US20040112658A1 - All terrain vehicle with passenger seating configuration - Google Patents
All terrain vehicle with passenger seating configuration Download PDFInfo
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- US20040112658A1 US20040112658A1 US10/647,779 US64777903A US2004112658A1 US 20040112658 A1 US20040112658 A1 US 20040112658A1 US 64777903 A US64777903 A US 64777903A US 2004112658 A1 US2004112658 A1 US 2004112658A1
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- atv
- passenger
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- center
- gravity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K5/00—Cycles with handlebars, equipped with three or more main road wheels
- B62K5/01—Motorcycles with four or more wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D33/00—Superstructures for load-carrying vehicles
- B62D33/02—Platforms; Open load compartments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J1/00—Saddles or other seats for cycles; Arrangement thereof; Component parts
- B62J1/12—Box-shaped seats; Bench-type seats, e.g. dual or twin seats
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J1/00—Saddles or other seats for cycles; Arrangement thereof; Component parts
- B62J1/28—Other additional equipment, e.g. back-rests for children
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J7/00—Luggage carriers
- B62J7/02—Luggage carriers characterised by the arrangement thereof on cycles
- B62J7/04—Luggage carriers characterised by the arrangement thereof on cycles arranged above or behind the rear wheel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J7/00—Luggage carriers
- B62J7/02—Luggage carriers characterised by the arrangement thereof on cycles
- B62J7/06—Luggage carriers characterised by the arrangement thereof on cycles arranged above the front wheel, e.g. on the handlebars
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K5/00—Cycles with handlebars, equipped with three or more main road wheels
- B62K5/02—Tricycles
- B62K5/027—Motorcycles with three wheels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S180/00—Motor vehicles
- Y10S180/908—Motor vehicles with short wheelbase
Definitions
- This invention relates to all-terrain vehicles (ATVs), and in particular ATVs in which two riders (a driver and a passenger) can be accommodated.
- the present invention also relates to the seat positioning of the driver and/or passenger on the ATV.
- ATV or all-terrain vehicle has been limited to straddle-seat, wheeled vehicles that are constructed to accommodate just one rider/driver.
- the Consumer Product Safety Commission uses the one-rider limitation to define “ATV” due to the belief that straddle-seat, wheeled vehicles could not safely accommodate more than one rider.
- FIGS. 11A and 11B despite numerous warnings that a conventional ATV 1000 is designed for just one driver 1010 , in practice, a passenger 1020 often rides on the one-person ATV 1000 . Placing two riders 1010 , 1020 on the one-rider ATV 1000 creates several problems. First, as illustrated in FIG. 11A, because the seat of the one-person ATV 1000 is designed to accommodate just one rider, the passenger 1020 must uncomfortably squeeze onto the ATV's one-person seat between the driver 1010 and a rear rack 1030 . Second, as illustrated in FIG. 11B, a footrest 1040 of the ATV 1000 is similarly designed to only be long enough to accommodate the feet of the one intended rider 1010 .
- the wheelbase of the ATV 1000 limits the space between front and rear fenders 1050 , 1060 . Consequently, the driver 1010 and passenger 1020 must uncomfortably share the one-person footrest 1040 . Third, because the driver 1010 and passenger 1020 must be so tightly squeezed together, the legs of the passenger 1020 inhibit the ability of the driver 1010 to move, while the body of the driver 1010 inhibits the ability of the passenger 1020 to move. Such limited mobility disadvantageously limits the abilities of both riders 1010 , 1020 to actively position themselves (e.g., lean into curves or slopes to stabilize the ATV 1000 ). Fourth, as shown in FIG.
- a center of gravity of the passenger 1020 is longitudinally positioned at, near, or even behind a rear wheel axis 1070 of the ATV 1000 such that the back of the passenger 1020 is disposed rearwardly of the rear wheel axis 1070 .
- Such positioning disadvantageously shifts the combined center of gravity of the ATV 1000 and riders 1010 , 1020 rearwardly, thereby increasing the risk of tipping the ATV 1000 .
- a conventional after-market passenger seat 1100 was developed in an attempt to provide a seat for the passenger 1020 that can be attached to a conventional one-person ATV like the ATV 1000 . While the passenger seat 1100 provides more longitudinal space for the passenger 1020 , it suffers from many of the same deficiencies encountered when the passenger 1020 rides on the ATV 1000 without a passenger seat 1100 (as shown in FIGS. 11A and 11B). Furthermore, the seat 1100 creates additional problems for the ATV 1000 and riders 1010 , 1020 . First, in order to give the passenger 1020 more longitudinal space, the seat 1100 must be shifted far to the rear of the ATV 1000 . As illustrated in FIG.
- the extremely elevated position of the seat 1100 relative to the driver's seat could cause the knees of the passenger 1020 to interfere with the elbows of the driver 1010 .
- upwardly extending, rigid sides 1110 of the seat 1100 force the legs of the passenger 1020 laterally inwardly, which further reduces the mobility of both the driver 1010 and the passenger 1020 and impairs their abilities to actively position themselves during operation of the ATV 1000 .
- placing the passenger seat 1100 on top of the rear rack 1030 disadvantageously eliminates the storage space on the rear rack 1030 . While the passenger seat 1100 opens up to provide a small, internal storage compartment, such a storage compartment is quite limited as compared to the large, open space provided above the rear rack 1030 when the passenger seat 1100 is removed.
- Amacker U.S. Pat. No. 4,247,030 discloses a passenger seat for an ATV that is similar to the after-market passenger seat 1100 illustrated in FIGS. 12A and 12B and suffers from many of the same shortcomings.
- the passenger's center of gravity is disposed well behind the rear axis and therefore disadvantageously increases the risk of rearward rollover of the ATV.
- both the passenger's legs and feet and the driver's legs and feet must be disposed at the same longitudinal position on the ATV, which causes the driver and the passenger to interfere with each other's mobility and thereby inhibit their ability to actively position themselves
- the inventors of the present invention determined that if multiple riders are going to ride ATVs that are designed for one rider despite all contraindications and/or other warnings, then ATVs should be constructed to safely accommodate multiple riders.
- one aspect of embodiments of the invention provides an ATV that can safely accommodate two riders (a driver and a passenger).
- the wheelbase of the ATV can be extended (e.g., by about 8′′ to 12′′ or more) compared to conventional ATVs such that the driver is more centered between the front and rear wheels, which creates additional space to accommodate an additional rider behind the driver.
- An advantage to this structure is that the driver's riding position is more active and comfortable, and the passenger can be accommodated in a safe manner.
- Another aspect of embodiments of the invention provides an ATV on which a single rider, i.e., the driver, can be placed in a position that is more centered between the front and rear pairs of wheels, thereby improving driver comfort and/or reducing the chances for roll-over of the ATV.
- Another aspect of embodiments of the present invention provides a two-person ATV that allows the driver and passenger to actively position themselves during operation of the ATV.
- an ATV including a frame and four wheels suspended from the frame, two of which are rear wheels and two of which are front wheels; the front wheels define a front axis and the rear wheels define the rear axis and each of the wheels includes an ATV-type tire.
- the ATV also includes a power unit for driving at least one of the wheels disposed on the frame and a straddle-type seat supported by the frame including a main seat portion for a driver and a secondary seat portion, rearward of the main portion, for a standard passenger.
- the ATV also includes a steering member connected to the frame comprising a handlebar for steering at least one of the wheels.
- the straddle-type seat is constructed and arranged such that, in use, a center of gravity of the passenger sitting in a standard riding position on the secondary seat portion is disposed in front of the rear axis.
- Another aspect of the embodiments of the invention provide an ATV wherein the distance between the front and the rear axes is between 52 and 72 inches.
- Still other aspects of the embodiments of the invention provide ATVs wherein the straddle-type seat is constructed and arranged such that, in use, the center of gravity is disposed in front of the rear axis by between 1 and 19 inches, by between 4 and 19 inches or by between 5 and 19 inches.
- ATVs wherein the straddle-type seat is constructed and arranged such that, in use, a ratio of a distance between the front axis and the center of gravity to a distance between the center of gravity and the rear axis is less than 13, is less than 11, may be less than 9, and may be between 2 and 13.
- an ATV including a frame and four wheels suspended from the frame, two of which being rear wheels and two of which being front wheels; the front and rear wheels have front and rear axes and each of the wheels includes an ATV-type tire.
- the ATV also includes a power unit for driving at least one of the wheels disposed on the frame and a straddle-type seat including a main seat portion for a driver and a secondary seat portion, rearward of the main portion, for a passenger.
- the ATV also includes a steering member connected to the frame and including a handlebar for steering at least one of the wheels.
- the straddle-type seat is constructed and arranged such that, in use, a center of gravity of the driver sitting in a standard riding position on the main seat portion is disposed in front of the rear axis by at least 13 inches.
- Another aspect of the embodiments of the invention provide an ATV wherein the distance between the front and the rear axes is between 52 and 72 inches.
- Another aspect of the embodiments of the invention provide an ATV wherein the straddle-type seat is constructed and arranged such that, in use, the center of gravity is disposed in front of the rear axis by at least 15 inches, by at least 19 inches or by between 21 and 30 inches.
- FIG. 1 is a left side view of an ATV according to a preferred embodiment of the present invention.
- FIG. 2A is a perspective view of the rear, left side of the ATV shown in FIG. 1;
- FIG. 2B is a rear view of the ATV shown in FIG. 1;
- FIG. 3A is a perspective view of the top, left side of the ATV shown in FIG. 1;
- FIG. 3B is a top left partial perspective view of the seat of the ATV shown in FIG. 1;
- FIG. 3C is a forward left partial perspective view of a backrest of the ATV shown in FIG. 1;
- FIG. 3D is a right perspective view of the backrest of the ATV shown in FIG. 1;
- FIG. 4A is a partial left side view of a left passenger grab handle of the ATV shown in FIG. 1;
- FIG. 4B is a partial top view of the left passenger grab handle of the ATV shown in FIG. 1;
- FIG. 4C is a partial perspective view of the left passenger grab handle of the ATV shown in FIG. 1;
- FIG. 5A is a partial perspective view of the top and side of a left footrest of the ATV shown in FIG. 1;
- FIG. 5B is a partial top perspective view of the left footrest of the ATV shown in FIG. 1;
- FIG. 5C is a left side view of the left footrest of the ATV shown in FIG. 1;
- FIG. 6 is a partial top view of the ATV shown in FIG. 1 with the seat removed;
- FIG. 7 is a partial perspective view taken from the top, rear side of the ATV shown in FIG. 1 with the seat removed;
- FIG. 8 is a side view of the ATV shown in FIG. 1 with comparative centers of gravity of various components of the ATV shown in FIG. 1 and of the conventional ATVs shown in FIGS. 11 A- 12 B;
- FIG. 9 is a partial cut away side view of the ATV shown in FIG. 1 illustrating the power unit
- FIG. 10 is a partial perspective view of the ATV of FIG. 1 with a back rest and grab handles according to an alternative embodiment of the present invention
- FIG. 11A is a left side view of two riders riding a conventional one-person ATV
- FIG. 11B is a forward left partial perspective view of the riders and ATV shown in FIG. 1A;
- FIG. 12A is a left side view of two riders riding a conventional one-person ATV with an after market passenger seat attached thereto;
- FIG. 12B is a forward left partial perspective view of the two riders and ATV shown in FIG. 12A;
- FIG. 13 illustrates a front elevational view of a standard rider
- FIG. 14 illustrates a side elevational view of the standard rider illustrated in FIG. 13.
- FIG. 15 is a left side view of a three person ATV according to an alternative embodiment of the present invention.
- FIGS. 1 - 9 show an ATV 100 according to a preferred embodiment of the present invention.
- the term ATV shall not be limited to the conventional one-rider definition. Rather, the ATV 100 is still referred to as an ATV despite the fact that it is designed to accommodate a driver and a passenger, and could be designed to accommodate a driver and multiple passengers. Moreover, the ATV 100 is designed to comfortably accommodate just the driver as well.
- the ATV 100 includes a frame 102 that supports a pair of laterally-spaced, front wheels 105 and a pair of laterally-spaced, rear wheels 110 .
- the wheels 105 , 110 are preferably equally sized.
- the wheels preferably have a diameter of between about 20 to 30 inches, and more preferably about 25 inches.
- a wheelbase L defined between the axes of rotation 107 , 108 of the wheels 105 , 110 , respectively, is significantly longer than in conventional ATVs, and is preferably at least about 8 to 14 inches longer than conventional ATV wheelbases.
- the wheelbase is about 10 to 12 inches longer than a standard ATV wheelbase.
- the wheelbase L is preferably between 52 and 72 inches, is more preferably between 55 and 65 inches, is even more preferably between 56 and 64 inches, and is even more preferably about 61 inches.
- the elongated wheelbase L provides numerous advantages over shorter conventional ATVs.
- These advantages may include improved stability (less susceptibility to tipping or rolling), a more comfortable ride for the driver, the comfortable facilitation of a seat for a passenger, active positioning of the driver and passenger, and reduced physical interference between the driver and passenger (i.e., via increased space for the driver and passenger and/or improved driver and passenger mobility).
- the wheelbase L should be measured over the longest longitudinal span between longitudinally adjacent axes. For example, if the ATV comprises six wheels (three pairs of longitudinally spaced wheels), the wheelbase L should be measured as the longer of (a) the distance between the front and middle pairs of wheels, and (b) the distance between the middle and rearward pairs of wheels. Similarly, the front and rear wheels are defined as the most-longitudinally-spaced-apart, longitudinally adjacent wheels. Consequently, “front” and “rear” wheels are defined relative to each other and not relative to additional wheels that may also be present on the ATV.
- the frame 102 is similar to a conventional ATV frame except that the frame 102 is extended to provide for the extended wheelbase L. Additional longitudinal structural elements may be added to the frame 102 to strengthen the frame 102 over the extended gap between the wheels 105 , 110 .
- the illustrated ATV 100 has a ground clearance G, which is similar to the ground clearance of conventional ATVs.
- the ground clearance G is defined by the vertical distance between the ground and the lowest point on the frame 102 and is preferably about 10 inches.
- a change in ground clearance should be further considered. For example, if the wheelbase L is extended further, the ground clearance G should be increased accordingly.
- the ATV 100 includes four wheels 105 , 110
- the ATV 100 could alternatively include just three wheels (e.g., two rear wheels and a single front wheel or two front wheels and a single rear wheel).
- the front wheels 105 are suspended from the frame 102 by an appropriate front suspension 106
- the rear wheels 110 are suspended from the frame 102 by an appropriate rear suspension 111 .
- the ATV 100 includes a front bumper 115 and a rear bumper 120 , and a front rack 125 and a rear rack 130 .
- a steering member e.g., a pair of handlebars 134 , is positioned just behind the front rack 125 and is operably coupled to the front wheels 105 for steering purposes.
- the ATV 100 includes front fenders 135 positioned above the front wheels 105 and rear fenders 137 positioned above the rear wheels 110 .
- the rear rack 130 preferably comprises a plurality of interconnected, elongated members, which are preferably tubular.
- a rear member 130 a defines a rearward end of the rear rack 130 .
- side members 130 b define the outer lateral sides of the rear rack 130 .
- a plurality of interior members 130 c are also provided. It should be noted, however, that the structure of the rear rack 130 may be modified or the rear rack 130 may be eliminated entirely without deviating from the scope of the present invention.
- the ATV 100 includes a straddle-type seat 139 that includes a main seat portion 140 and a secondary seat portion 145 , which are connected together with a transition 142 , which may provide a definite dividing line between the main and secondary seat portions 140 , 145 . Because the transition 142 angles upwardly at approximately a 45 degree angle from the main seat portion 140 to the secondary seat portion 145 , the transition 142 generally provides a rear portion to the main seat portion 140 that tends to discourage the driver (i.e., the person sitting in the main seat portion 140 ) from sliding rearwardly onto the secondary seat portion 145 .
- a precise transition 142 may be eliminated altogether such that the main and secondary seat portions 140 , 145 together form a single, elongated, seat portion. Furthermore, the transition may comprise a gap between the main and secondary seat portions 140 , 145 such that the seat 139 has two separated portions.
- a longitudinal length S of the seat 139 formed between a forward end 140 a of the main seat portion 140 and a rearward end 145 a of the secondary seat portion 145 a is significantly longer than in the prior art.
- the length S is preferably between 30 and 60 inches, is more preferably between 31 and 50 inches, is even more preferably between 32 and 45 inches, and is even more preferably about 37 inches.
- the forward end 140 a of the seat 139 is defined as a point that is slightly rearward (preferably 2-5 inches) of the rear end of the handlebars 134 .
- the forward end 140 a is also preferably disposed slightly forward or at the same longitudinal position as a heel stop 280 of a footrest 250 .
- the forward end 140 a is defined as the forwardmost longitudinal position on the seat 139 that is designed to support any portion of the driver.
- the rearward end 145 a of the seat 139 is defined by a longitudinal position of a forward surface 150 a of a back rest 150 of the ATV 100 . However, if a back rest 150 is not provided on the ATV 100 , the rearward end 145 a is quantitatively defined by the rearwardmost longitudinal position on the seat 139 that is designed to support any portion of the passenger.
- the rearward end 140 a of the seat and/or the forward surface 150 a of the back rest 150 are preferably disposed in front of a majority of the rear rack 130 so that they do not interfere substantially with an open storage space provided on top of the rear rack 130 . Accordingly, the rearward end 140 a and the forward surface 150 a are preferably disposed in front of a back side 130 a of the rear rack by a horizontal distance J, which is preferably between 5 and 20 inches, is more preferably between 8 and 20 inches, is even more preferably between 10 and 20 inches, and is even more preferably between 14 and 20 inches.
- a horizontal distance J which is preferably between 5 and 20 inches, is more preferably between 8 and 20 inches, is even more preferably between 10 and 20 inches, and is even more preferably between 14 and 20 inches.
- the back side 130 a of the rear rack is generally longitudinally aligned with a rear end of the ATV 100 as a whole, the rearward end 140 a and the forward surface 150 a bear the same or similar relationship to the rear end of the ATV 100 as they do to the back side 130 a of the rear rack 130 .
- the main seat portion 140 accommodates a standard driver in a standard driving position while the ATV 100 is headed straight forward (i.e., to the left as illustrated in FIG. 1) on flat terrain.
- the main portion 140 is positioned behind the front wheel axis 105 by approximately the same longitudinal extent as a conventional rider seat on a conventional ATV.
- the main seat portion 140 includes a main supporting range 140 b , which is defined on the upper surface of the main seat portion 140 by a range of positions of a center of the weight distribution on the main seat portion 140 of a driver who is sitting on the main seat portion 140 in an operating position.
- a center of the main supporting range is preferably longitudinally disposed at the same point as the center of gravity 520 of the driver (as shown in FIG. 8 and described in greater detail below).
- they could be different, if desired and depending on the layout of the other components of the ATV 100 such as the engine 215 .
- the main supporting range 140 b is generally centered at a lateral center of the main seat portion 140 two thirds of the way back on the main seat portion 140 from the forward end 140 a (i.e. positioned behind the forward end 140 a by two thirds of the longitudinal length of the main seat portion 140 , which is defined generally as a distance M between the forward end 140 a and the uppermost edge of the transition/rear end 142 of the main seat portion 140 ).
- the main supporting range may be located at a different relative position on the main seat portion 140 .
- the main supporting range 140 b preferably extends forwardly and rearwardly from its center by about 5 inches.
- the center of the main supporting range 140 b is disposed longitudinally rearwardly from the front wheel axis 107 by a distance T, which is preferably about 40-80% of the wheelbase L, is more preferably about 45-70% of the wheelbase L, and is even more preferably about 55-65% of the wheelbase L.
- the center of the main supporting range 140 b is disposed in front of the rear wheel axis 108 by a distance that is preferably about 20-60% of the wheelbase L, is more preferably about 30-55% of the wheelbase L, and is even more preferably about 35-45% of the wheelbase L.
- the center of the main supporting range 140 b is positioned in front of the rear wheel axis 108 by a distance L minus T, which is preferably between 21 and 30 inches, and is more preferably about 21.6 inches. In an alternative embodiment, distance L minus T is preferably about 22-30 inches, and is more preferably about 24-27 inches.
- the position of the main seat portion 140 places the driver closer to the center of the wheelbase L than in conventional ATVs. Positioning the driver close to the center of the wheelbase L of the ATV 100 advantageously improves the driver's comfort. This positioning may also improve the handling of the ATV 100 due to the driver's active positioning.
- the secondary portion 145 is designed to accommodate a passenger in a standard riding position.
- a secondary supporting range 145 b is disposed on the secondary seat portion 145 and is defined in the same manner as the main supporting range 140 a .
- a longitudinal length N of the secondary seat portion 145 is preferably 5% to 45% shorter than the length M of the main seat portion 140 , but could alternatively be the same as the length M or even longer than the length M.
- a back rest 150 is provided behind the secondary portion 145 to help support the back of the passenger.
- the back rest 150 also deters additional unauthorized passengers from riding the ATV 100 .
- the back rest 150 mounts on a post 152 that attaches to the rear rack 130 or directly to the frame 102 .
- the post 152 is bent at its lower end and includes a slot 153 through which a plurality of bolts 154 extend to attach the post 152 to the rear rack 130 .
- the slot 153 allows the longitudinal position of the back rest 150 to be adjusted.
- other longitudinal adjustment mechanisms may alternatively be used.
- the back rest 150 is adapted to accommodate a standard sized passenger, but may also be vertically adjustable to accommodate different sized passengers.
- the post 152 (or some other part) of the backrest 150 is preferably designed such that the backrest 150 may deflect forwardly and rearwardly by several inches (e.g., 3 to 4 inches) during normal operation when subjected to a longitudinal load. This deflection enables the backrest 150 to more comfortably accommodate the passenger's back.
- the post 152 may comprise a resilient material such as spring steel that creates the desired flexibility.
- FIG. 10 illustrates an alternative back rest 160 that may mount onto the ATV 100 instead of the back rest 150 .
- the back rest 160 is mounted to the ATV 100 via two laterally-spaced support posts 162 that extend between opposite lateral sides of the back rest 160 and a structural portion of the ATV 100 such as the frame 102 or the rear rack 130 .
- a forward back-supporting surface 160 a of the back rest 160 arches rearwardly in its middle portion such that a middle of the surface 160 a is disposed rearwardly of the lateral sides of the surface 160 a.
- a back-supporting forward surface 150 a is adapted to support and rest against a back of the passenger.
- the forward surface 150 a is preferably disposed in front of the axis 108 of the rear wheels 110 by a distance B.
- the forward surface 150 a could alternatively be disposed behind the rear axis 108 if other components are moved, the danger of rollover is minimized, and/or the dynamic handling of the ATV is not significantly adversely affected.
- the distance B is preferably greater than zero, is more preferably between 1 ⁇ 2 and 10 inches, and is even more preferably between about 1 ⁇ 2 and 3 inches.
- the distance B may preferably be between about 1 and 10 inches, and more preferably between about 1 and 3 inches.
- the forward surface 150 a is preferably disposed in front of a majority of, if not all of, the rear rack 130 . Accordingly, the back rest 150 does not significantly, if at all, interfere with the storage space above the rear rack 130 (i.e., the rear rack 130 is usable even when the back rest 150 is attached to the ATV 100 ). Furthermore, the forward surface 150 a is preferably disposed at generally the same longitudinal position along the ATV 100 as a rearward end 145 a of the secondary seat portion 145 . Accordingly, the rearward end 145 a of the secondary seat portion 145 and the forward surface 150 a preferably bear the same or similar longitudinal relationships to the axis 108 and rear rack 130 .
- a secondary supporting range 145 b of the secondary seat portion 145 is disposed farther forward relative to the rear wheel axis 108 on the ATV 100 than the after-market passenger seat on conventional ATVs (as described above), which are disposed behind the driver's seat. Accordingly, as illustrated in FIG. 8 and discussed in greater detail below, a passenger on the secondary seat portion 145 of the ATV 100 is positioned closer to the center of gravity 500 of the ATV 100 than passengers on conventional aftermarket passenger seats of conventional ATVs. Placing the passenger closer to the center of the wheelbase L of the ATV 100 improves the passenger's comfort and reduces the risk of roll-over.
- the passenger's weight is more evenly distributed over the wheelbase L of the ATV 100 than in conventional aftermarket passenger seats, where a center of gravity 570 of a passenger might disadvantageously be positioned behind the rear wheel axis 108 .
- the secondary seat portion 145 should be disposed high enough above the rear wheel axis 108 that it does not interfere with the rear wheels 110 and/or rear fenders 137 . Accordingly, the secondary seating range 145 b of the secondary seat portion 145 is preferably disposed higher than the rear wheel axis 108 by a distance R. (see FIG. 1).
- the distance R is preferably between 20 and 35 inches, and is more preferably about 25 inches. In an exemplary embodiment, if the wheels 105 , 110 have 26 inch diameters and the distance R is 25 inches, the secondary seat portion 145 would be disposed above the ground by about 38 inches.
- the secondary seat portion 145 is disposed lower on the ATV 100 than conventional aftermarket passenger seats on conventional ATVs.
- the lower positioning is possible because the secondary seat portion 145 is disposed in front of the rear rack 130 and/or rear wheels 110 , instead of directly over the rear wheels or even behind the rear wheels as in the prior art. Accordingly, the rear wheels 110 and rear fenders 137 interfere less with the secondary seat portion 145 than the rear wheels and fender of a conventional ATV interfere with conventional aftermarket passenger seats. As illustrated in FIG.
- the center of gravity 550 of a passenger on the secondary seat portion 145 of the ATV 100 is lower than the center of gravity 570 of a passenger on a prior art passenger seat.
- Lowering the passenger's center of gravity 550 advantageously improves the passenger's comfort, as well as the performance of the ATV 100 .
- the main supporting range 140 b is disposed below the secondary supporting range 145 b by a vertical height H.
- the height H is preferably between 0 and 8 inches, is more preferably between 1 and 4 inches, and is even more preferably about 2 inches. While the height H is preferably greater than 1 inch, the height H should be limited. If the height H is too large, the passenger's knees may interfere with the elbows of the driver and inhibit the driver's ability to steer the ATV 100 . To avoid this problem, the height H is preferably less than 8 inches and is more preferably less than 4 inches. The height H may alternatively be zero (or even negative) such that the main and supporting ranges 140 b , 145 b are disposed at approximately equal heights.
- the center of the main supporting range 140 b is longitudinally spaced from the center of the secondary supporting range 145 b by a distance Q, which is preferably about 8 to 20 inches, is more preferably about 12 to 17 inches.
- the distance Q provides adequate longitudinal space for both the driver and the passenger such that the riders to not significantly interfere with each other.
- the distance Q provides adequate longitudinal space for the riders to comfortably and actively position themselves.
- the forward part of the secondary seat portion 145 is preferably narrower than a rearward part of the main seat portion 140 .
- the wider rearward parts of the seat portions 140 , 145 provide comfortable support for the riders while the narrower forward parts of the seat portions 140 , 145 provide the riders with greater leg mobility that improves the riders' abilities to actively position themselves.
- the riders when making a left turn during operation of the ATV, it is advantageous for the riders to be able to actively position themselves by shifting their weight to the left to stabilize the ATV 100 .
- the inward taper of the forward parts of the right side of the seat portions 140 , 145 enables the riders to better position themselves by comfortably angling their right legs to a greater extent.
- FIG. 6 is a partial top view of the ATV 100 with the seat 139 removed to expose the power unit 215 , which in this embodiment comprises an internal combustion engine.
- the power unit 215 is operatively connected to at least one of the wheels 105 , 110 via one or more driveshafts 216 to power the ATV 100 .
- the power unit 215 is preferably operatively connected to all the wheels 105 , 110 .
- the center of gravity of the riders and vehicle 100 should be located properly.
- the riders (driver and passenger) should be located as close as possible to the center of the wheelbase L. This positioning enables the riders to naturally pivot between the front and rear wheels 105 , 110 and experience as little jostling forces as possible during operation of the ATV 100 .
- the comfort provided by such passenger positioning is best illustrated with reference to a school bus, in which a person sitting in the back of the bus is far away from the bus's wheelbase center and experiences significant jostling as the bus pivots over bumps. Accordingly, the combined center of gravity of the vehicle, driver, and passenger should each be close to the center of the wheelbase L of the ATV 100 in order to obtain dynamic behavior that is as neutral as possible.
- FIG. 8 comparatively illustrates the centers of gravity of an exemplary ATV 100 , driver, and passenger relative to the centers of gravity of (1) the conventional ATV 1000 , its driver, and an unauthorized passenger (as shown in FIGS. 11A and 11B), and (2) the conventional ATV 1000 , its driver, and a passenger sitting in the after market passenger seat 1100 (as shown in FIGS. 12A and 12B). All positions are shown relative to the rear axis of the relevant ATV 100 , 1000 .
- the exemplary ATV 100 is shown in phantom to provide perspective to the various positions.
- the wheelbase L is about 61 inches
- the distance R is about 25 inches
- the distance H is about 2 inches
- the distance B is about 3 ⁇ 4 of an inch
- the distance S is about 37 inches (see dimensions in FIG. 1).
- an ATV 100 center of gravity 500 is horizontally disposed in front of the axis 108 by a distance A xR , which is preferably between 26 and 35 inches, is more preferably between 27 and 34 inches, and is even more preferably about 29 inches.
- a center of gravity 510 of the ATV 1000 is only disposed 25 inches in front of the rear wheel axis 1070 (see FIG. 11A).
- a ratio of a horizontal distance A xR between the rear axis 108 and the center of gravity 500 of the ATV 100 to the distance L is preferably between 0.25 and 0.75, is more preferably between 0.4 and 0.6, and is even more preferably between about 0.45 and 0.55.
- a ratio of a horizontal distance A xF between the front axis 107 and the center of gravity 500 of the ATV 100 to the distance A xR (between the center of gravity 500 and the rear axis 108 ), which equals the distance L divided by the distance A xR minus one, is preferably between 1.05 and 2, is more preferably greater than 1.07, is even more preferably greater than 1.09, is even more preferably greater than 1.1, and is even more preferably about 1.12.
- the center of gravity 500 is disposed above the rear wheel axis 108 by a distance A y , which is preferably between about 0 and 10 inches, and is more preferably about 7 inches. In an alternative embodiment, the distance A y is about 5 inches.
- an angle ⁇ R is formed between the front wheel axis 107 , the rear wheel axis 108 , and the center of gravity 500 .
- an angle ⁇ F is formed between the rear wheel axis 108 , the front wheel axis 107 , and the center of gravity 500 .
- the angles ⁇ R and ⁇ F are preferably less than 20 degrees and more preferably about 15 degrees.
- the angle ⁇ R may alternatively be about 10 degrees.
- the angle ⁇ F may alternatively be about 9 degrees.
- a line that forms the base of the angles ⁇ R , ⁇ F and extends between the front and rear axes 107 , 108 is preferably generally level because the front and rear wheels 105 , 110 are preferably generally equally sized.
- the front wheel 105 has a 25 inch diameter while the rear wheel 110 has a 26 inch diameter.
- a center of gravity 520 of the driver sitting on the main seat portion 140 of the ATV 100 is horizontally disposed in front of the axis 108 by a distance D xR , which is preferably between 13 and 30 inches, is more preferably between 15 and 30 inches, is even more preferably between 19 and 30 inches, and is even more preferably about 22 inches.
- the driver on the ATV 1000 without a passenger seat 1100 who is squished forwardly to provide space for the passenger 1020 as shown in FIG. 11A, has a center of gravity 530 that is only disposed about 19 inches in front of the rear wheel axis 1070 .
- FIG. 8 illustrates that the elongation of the frame 102 and wheelbase L of the ATV 100 enable the driver on the ATV 100 to be positioned farther in front of the rear wheel axis 108 than on conventional ATVs.
- the center of gravity 520 is disposed above the rear wheel axis 108 by a distance D y , which is preferably between about 10 and 35 inches, is more preferably between 15 and 35 inches, and is even more preferably about 22 inches.
- an angle ⁇ R is formed between the front wheel axis 107 , the rear wheel axis 108 , and the center of gravity 520 .
- An angle ⁇ F is formed between the rear wheel axis 108 , the front wheel axis 107 , and the center of gravity 520 .
- the angles ⁇ R and ⁇ F are preferably between 30 and 60 degrees, are more preferably between 30 and 51 degrees, and are even more preferably about 45 degrees.
- the angle ⁇ F is preferably between 15 and 45 degrees, is more preferably between 15 and 33 degrees, and is even more preferably about 32 degrees.
- a center of gravity 550 of the passenger sitting on the secondary seat portion 145 of the ATV 100 is horizontally disposed in front of the rear axis 108 by a distance P xR , which is preferably greater than zero, is more preferably between 1 and 19 inches, is even more preferably between 4 and 15 inches, and is even more preferably about 7 inches.
- a center of gravity 560 of the unauthorized passenger on the ATV 1000 without the passenger seat is only disposed about 4 inches in front of the rear axis 1070 .
- a center of gravity 570 of the passenger on the passenger seat 1100 (as shown in FIG. 12A) is actually disposed behind the rear axis 1070 by about 6 inches. Accordingly, FIG.
- FIG 8 illustrates that the elongation of the frame 102 and wheelbase L and the positioning of the secondary seat portion 145 enable the passenger on the ATV 100 to be disposed farther forward on the ATV 100 than on conventional ATVs. Such positioning improves the stability and comfort of the passenger on the ATV 100 .
- a ratio of a distance P xF between the front axis 107 and the center of gravity 550 of the passenger on the ATV 100 to the distance P xR (between the center of gravity 550 and the rear axis 108 ), which equals the distance L divided by the distance PXR minus one, is preferably between 2 and 13, is more preferably between 2 and 11, is even more preferably between 2 and 9, and is even more preferably about 8.
- a ratio of the distance between the front axis 107 and center of the secondary supporting range 145 b to the distance between the center of the secondary supporting range 145 b and the rear axis 108 is preferably between 2 and 50, is more preferably between 2 and 40, is even more preferably between 2 and 30, and is even more preferably between 10 and 20.
- the center of gravity 550 is disposed above the rear wheel axis 108 by a distance P y , which is preferably between about 20 and 40 inches, and is more preferably about 27 inches.
- an angle ⁇ R is formed between the front wheel axis 107 , the rear wheel axis 108 , and the center of gravity 550 .
- the angle RR is preferably between 60 and 90 degrees, is more preferably between 70 and 80 degrees, and is even more preferably about 76 degrees.
- An angle ⁇ F is formed between the rear wheel axis 108 , the front wheel axis 107 , and the center of gravity 550 .
- the angle ⁇ F is preferably between 15 and 45 degrees, is more preferably between 15 and 30 degrees, and is even more preferably about 27 degrees.
- a combined center of gravity 580 of the ATV 100 and the two riders is horizontally disposed in front of the rear axis 108 by about 25 inches.
- a combined center of gravity 590 is only disposed about 21 inches in front of the rear axis 1070 .
- a combined center of gravity 600 is only disposed about 19 inches in front of the rear axis 1070 .
- the combined center of gravity 580 is preferably disposed rearwardly of the front axis 107 by a distance C xF that is preferably between 25 and 50 inches, is more preferably between 30 and 45 inches, is even more preferably between 33 and 45 inches, is even more preferably between 34 and 45 inches, and is even more preferably about 36 inches.
- the combined center of gravity 580 is preferably disposed above the rear wheel axis 108 by a distance C y , which is preferably between 5 and 20 inches, and is more preferably by about 11 inches.
- an angle ⁇ R is formed between the front wheel axis 107 , the rear wheel axis 108 , and the combined center of gravity 580 .
- the angle ⁇ R is preferably between 15 and 45 degrees, is more preferably between 15 and 35 degrees, and is even more preferably about 30 degrees. In an alternative embodiment, the angle ⁇ R is preferably between 15 and 30 degrees, is more preferably between 15 and 25 degrees, and is even more preferably about 24 degrees.
- An angle ⁇ F is formed between the rear wheel axis 108 , the front wheel axis 107 , and the combined center of gravity 580 .
- the angle ⁇ F is preferably between 10 and 45 degrees, is more preferably between 10 and 30 degrees, is even more preferably between 15 and 30 degrees, and is even more preferably about 20 degrees. In an alternative embodiment, the angle ⁇ F is preferably between 10 and 18 degrees, and is more preferably about 17 degrees.
- the power unit 215 is located in front of the rear wheel axis 108 by a distance E.
- the distance E is preferably about 22 to 40 inches and is more preferably about 24 to 38 inches. In an alternative embodiment, the distance E is preferably about 22-30 inches, and is more preferably about 24-27 inches. Because the power unit 215 is preferably disposed at generally the same longitudinal position on the ATV 100 as the main supporting range 140 b , the distances E plus T equal the wheelbase L. However, such a relationship between the power unit 215 and the main supporting range 140 b is not required. Furthermore, a ratio of the distance E to the distance L is preferably between 0.25 and 0.75 and is more preferably between 0.4 and 0.6.
- the centers of gravity of the riders are measured when the riders are seated on their respective seat portions in standard riding positions.
- the driver's feet are placed on the footrests, the driver is sitting on the seat portion 140 , and the driver's hands are grabbing the handlebars 134 of other steering device.
- the passenger's feet are placed on the footrests, the passenger is sitting on the seat portion 145 , and the passenger's hands are holding onto the passenger grab handles, if provided.
- the standard driver and passenger have the weight and dimensions of a 50 th percentile human male, which are illustrated in FIGS. 13 and 14.
- the power unit 215 which is among the heaviest components on the ATV 100 , is disposed in front of the rear axis 108 by the distance E, and the wheelbase L of the ATV 100 is longer than on conventional ATVs, the center of gravity 500 of the ATV 100 is shifted proportionally rearwardly relative to wheelbases of conventional ATVs. Accordingly, the center of gravity 500 of the ATV 100 is shifted rearwardly and is therefore closer to the main and secondary supporting ranges 140 b , 145 b (and consequently closer to the centers of gravity 520 , 550 of the riders) than on conventional ATVs. Also, while the power unit is typically disposed in front of the driver seat in conventional ATVs, a forward end of the power unit 215 is preferably disposed longitudinally rearwardly from the forward end 140 a of the main seat portion 140 of the ATV 100 .
- the combined center of gravity 580 should be as centered on the wheelbase L as possible. If the center of gravity of the vehicle 500 is centered on the wheelbase L, the center of gravity of the driver 520 and the passenger 550 should be as close to the center of the wheelbase L as possible. Because it is difficult to simultaneously center each of the driver, passenger, and ATV 100 on the wheelbase L, the ATV 100 should be designed so that the center the combined center of gravity 580 is positioned as close to the center of the wheelbase L as possible. It is anticipated that a single rider (the driver) will ride the ATV 100 about 70% of the time and two riders (the driver and the passenger) will ride the ATV about 30% of the time.
- the center of gravity 500 of the ATV 100 is preferably positioned such that when a combined center of gravity 580 is determined using a percentage-of-use-based weighted average of the positions and weights of the driver and passenger, the combined center of gravity 580 is positioned as close to the center of the wheelbase L as possible.
- the dynamic characteristics of the ATV 100 and comfort of the driver and passenger may be improved by positioning the center of gravity 500 of the ATV 100 as close as possible to the centers of gravity 520 , 550 of the riders.
- the center of gravity 500 of the ATV 100 could be moved part way between the centers of gravity 520 , 550 of the driver and passenger with the exact placement of the center of gravity 500 being determined by the weighted average of the percentage of use of the ATV 100 in one-rider and two-rider modes.
- the main and secondary supporting ranges 140 b , 145 b are reasonably close to the longitudinal positions of the centers of gravity 520 , 550 of the driver and passenger, respectively, when riding the ATV 100 .
- the centers of the supporting ranges 140 b , 145 b will be used herein as reference points for describing the placement of the center of gravity 500 of the ATV 100 .
- the centers of gravity 520 , 550 are disposed in front of the centers of the supporting ranges 140 b , 145 b by between about 2 and 5 inches.
- the centers of gravity 520 , 550 are disposed above the centers of the supporting ranges 140 b , 145 b by several inches (e.g., 4-6 inches).
- the center of gravity 500 of the ATV 100 is preferably longitudinally positioned between the supporting ranges 140 b , 145 b , and is more preferably disposed rearwardly of the main supporting range 140 b by about 30% of the distance Q between the centers of the supporting ranges 140 b , 145 b .
- the center of gravity of the ATV 100 is preferably disposed closer to the main supporting range 140 b than to the secondary supporting range 145 b because a driver rides the ATV 100 70% more often than a passenger.
- the power unit 215 may be shifted further rearward in order to shift the center of gravity 500 of the ATV 100 farther rearward.
- a hydraulic brake actuating system is typically provided rearwardly of the power unit. Such positioning is convenient because it is close enough to the footrest to conveniently provide a mechanical connection between a foot brake pedal and the hydraulic brake actuating system.
- a front (or main) footrest portion 260 of a footrest 250 of the ATV 100 which is described in greater detail below, is disposed in front of the power unit 215 , which places the front foot rest portion 260 well forward of the conventional position of the hydraulic brake actuating system.
- a hydraulic brake actuating system 217 of the ATV 100 is disposed in front of the power unit 215 (see FIGS. 6 and 7).
- the system 217 includes a master cylinder 220 operatively connected via hydraulic lines 221 to conventional hydraulic brakes (not shown) that are connected to one or more of the wheels 105 , 110 .
- the master cylinder 220 includes mating cylinder and piston portions 220 a , 220 b .
- An axis of the master cylinder 220 extends in a direction that is generally perpendicular to the longitudinal direction of the ATV 100 . As best seen in FIG.
- the master cylinder 220 is angled slightly downwardly such that the piston portion 220 b is disposed below the cylinder portion 220 a .
- the cylinder portion 220 a is mounted (via bolts or other fasteners) to a portion of the frame 102 .
- a swing arm 223 is also pivotably connected at a first end 223 a to the frame 102 for relative pivotal movement about a swing arm axis 224 that extends in the longitudinal direction of the ATV 100 .
- a second end 223 b of the swing arm 223 is pivotably connected to the piston portion 220 b such that pivotal movement of the swing arm 223 actuates the master cylinder 220 .
- a hand brake lever 226 (see FIG. 1) is operatively connected to the second end 223 b of the swing arm 223 via a flexible sheathed cable 225 (see FIG. 7).
- a laterally-extending foot brake 227 attaches (preferably via a weld) to the first end 223 a of the swing arm 223 for common pivotal movement-about the swing arm axis 224 relative to the frame 102 .
- the foot brake 227 includes a foot pedal 227 a that is conveniently disposed above a right, front portion 260 of a right footrest 250 .
- a tension spring 228 connects between the foot brake 227 and a portion of the frame 102 to bias the foot brake 227 upwardly and thereby bias the second end 223 b and piston portion 220 b to the left as illustrated in FIG. 7.
- the driver can either squeeze the hand brake 226 or depress the foot pedal 227 a to move the second end 223 b of the swing arm 223 to the right, move the piston portion 220 b to the right, and contract the master cylinder 220 .
- the spring 228 pulls the foot brake 227 upwardly, which pushes the second end 223 b of the swing arm 223 back to the left to extend the master cylinder 220 and release the brakes.
- the longitudinal elongation of the frame 102 enables ATV 100 components such as the power unit 215 , brake actuating system 217 , batteries, etc. to be longitudinally spaced from each other to a greater extent than in conventional ATVs.
- ATV 100 components such as the power unit 215 , brake actuating system 217 , batteries, etc.
- the lack of longitudinal space forces designers to stack ATV components into longitudinally cramped locations.
- the longitudinal elongation of ATV 100 allows components to be spread out over the longer length of the frame 102 of the ATV 100 .
- the longitudinal spacing makes access to individual components such as the brake actuating system 217 (see FIGS. 6 and 7) much simpler.
- the removable seat 139 which is removably connected to the ATV 100 using conventional fasteners (e.g., a latch, etc.), an operator can access many of the components of the ATV 100 for necessary maintenance and/or servicing. Otherwise, the space can be used for additional storage.
- conventional fasteners e.g., a latch, etc.
- Each of the rear fenders 137 includes a series of ventilation openings 230 that direct air to the air intake of the power unit 215 and/or a radiator/fan assembly (not shown). Additional ventilation openings 235 are provided for the power unit 215 below the forward end 140 a of the main seat portion 140 a.
- the ATV 100 includes left and right footrests 250 , which include front portions 260 for the driver sitting on the main seat portion 140 and rear portions 270 for the passenger sitting on the secondary seat portion 145 .
- the front and rear portions 260 , 270 preferably include upper surfaces 260 a , 270 a that are each generally horizontal and include anti-slip surface treatments.
- the upper surfaces 260 a , 270 a may alternatively be angled forwardly or rearwardly.
- the front and rear footrest portions 260 , 270 preferably include respective heel stops 280 , 290 that extend upwardly from the upper surfaces 260 a , 270 a.
- the upper surface 270 a of the rear footrest portion 270 is elevated relative to the upper surface 260 a of the front footrest portion 260 by a vertical distance X, which preferably approximates the vertical distance H formed between the seat portions 140 , 145 .
- the distance X may alternatively be larger than the distance H such that an average sized passenger sitting on the secondary seat portion 145 must bend his/her legs to a greater extent than the driver who sits on the main seat portion 140 .
- the distance X is preferably between 1 and 10 inches, is more preferably between 3 and 8 inches, is even more preferably between 3 and 7 inches, is even more preferably between 4 and 6 inches, and is even more preferably about 5 inches.
- the larger distance X also advantageously accommodates a passenger who is smaller than the driver.
- the rear footrest portion 270 preferably comprises a plurality of sheets of material that connect together to elevate the upper surface 270 a relative to the upper surface 260 a .
- the upper surface 270 a is defined by an upper sheet member 270 d of the rear footrest portion 270 .
- the footrest portion 270 also includes a front, generally-planar, sheet member 270 b , which extends vertically from a forward edge of the upper sheet member 270 d to an upper rear edge of the front footrest portion 260 .
- a side, generally-planar, sheet member 270 c extends vertically from an outer lateral edge of the upper sheet member 270 d to a side guard 300 , which is described in greater detail below.
- the sheet members 270 b , 270 c , 270 d preferably comprise sheet metal and may include holes and/or openings to reduce their weight without significantly adversely affecting their strength.
- the separate members 270 b , 270 c , 270 d may be integrally formed by bending a unitary sheet of material, or may alternatively be welded, glued, bolted, or otherwise fastened together.
- the footrests 250 preferably extend over a full longitudinal distance F formed between the fenders/mudguards 135 , 137 . Because the wheelbase L of the ATV 100 is significantly longer than in conventional ATVs, the distance F between the fenders 135 , 137 is also significantly longer than in conventional ATVs.
- the length F is preferably as large or larger than two average-sized shoes lined up end to end. Accordingly, the length F is preferably between 17 and 40 inches, is more preferably between 20 and 40 inches, is even more preferably between 25 and 35 inches, and is even more preferably about 30 inches. Such a length F allows the driver and passenger to both use the footrests 250 without interfering with each other's feet.
- a ratio of the wheelbase L to the length F is preferably between 1 and 2.7, is more preferably less than 2.6, is even more preferably less than 2.5, and is even more preferably about 2.
- right and left side guards (or side bumpers or tree guards or side rails) 300 preferably extend laterally outwardly from the frame 102 and/or footrests 250 to positions that are laterally outward from the outer lateral ends of the footrests 250 .
- the side guards 300 preferably extend longitudinally from a forward end of the front footrest portion 260 to a rearward end of the rearward footrest portion 270 . At least a portion of the side guards 300 also preferably extends laterally outwardly beyond the rear fenders 137 .
- a middle portion of each side guard 300 angles laterally outwardly and upwardly as it progresses rearwardly.
- the illustrated side guards 300 provide support for the footrests 250 . Accordingly, the upward angle of the middle portion of the side guards 300 preferably creates at least a portion of the gap X between the front and rear portions 260 , 270 of the footrests 250 . However, the side guards 300 and footrests 250 may alternatively be completely distinct.
- Each of the illustrated side guards 300 preferably comprises strong, metallic, unitary, tubular members.
- the unitary member may be a composite of integrally connection sections.
- the integral connection between sections of each side guard 300 may be formed by welding, gluing, or using any other comparable permanent attachment mechanism.
- the unitary member may result from integral formation, such as would be the case if each side guard comprised a single, elongated, tubular member.
- Each of the illustrated side guards 300 are designed to withstand an impact with a tree or other stationary object during operation of the ATV 100 . If the driver steers the ATV 100 too close to a stationary object, the side guards 300 will contact the object and deflect the ATV 100 away from the object to prevent the object from squeezing laterally against and/or breaking fragile components of either the ATV 100 (e.g., the fenders 135 , 137 , the rear rack 130 , or the grab handles 340 ) or, more importantly, the riders' arms and legs.
- the ATV 100 e.g., the fenders 135 , 137 , the rear rack 130 , or the grab handles 340
- An open space 330 is provided in front of the main portion 140 of the seat 139 .
- the open space 330 is provided to facilitate entry and exit from the ATV 100 , as described in commonly assigned U.S. application Ser. No. 09/057,652, filed on Apr. 9, 1998, which is incorporated herein by reference in its entirety.
- the open space 330 could be provided just behind the main seat portion 140 and just in front of the secondary seat portion 145 .
- an open space could be provided in front of the main portion 140 and in front of the secondary portion 145 , to facilitate ingress/agress of both the driver and passenger.
- the open space 330 could be omitted entirely without deviating from the scope of the present invention.
- right and left grab handles 340 are provided on the right and left lateral sides of the secondary seat portion 145 to help the passenger sitting on the secondary seat portion 145 stabilize himself/herself during operation of the ATV 100 .
- the grab handles 340 preferably do not extend laterally outwardly beyond the side guards 300 or the side members 130 b of the rear rack 130 .
- the illustrated grab handles 340 attach to and are supported by the rear rack 130 , but may alternatively attach to any other suitable portion of the ATV 100 (e.g., directly to the frame, etc.).
- the grab handles 340 extend forwardly from a forward portion of the rear rack 130 .
- the grab handles 340 are clamped to the rear rack 130 with bolts 342 but may alternatively be attached to the rear rack 130 using a variety of other attachment techniques (e.g., integral formation with the rear rack, glue, direct bolts, welds, etc.). As illustrated in FIGS. 1 and 4A, the grab handles 340 are positioned at roughly the same longitudinal position as the secondary supporting range 145 b of the secondary seat portion 145 to provide the passenger with easy access to the grab handles 340 . Further, the grab handles 340 are preferably conveniently disposed at about the same height as the secondary supporting range 145 b .
- the grab handles 340 are high enough that the passenger can easily reach them while seated on the secondary seat portion 145 , the grab handles 340 are low enough that they do not significantly interfere, if at all, with the lateral movement of the passenger's legs or with the passenger's ability to mount and dismount the ATV 100 . Consequently, if the ATV 100 happens to roll over, the grab handles 340 will not trap the passenger on the ATV 100 . Furthermore, the combination of physical freedom and support that the grab handles 340 provide the passenger help to enable the passenger to comfortably and actively position himself/herself while riding the ATV 100 .
- the grab handle 340 preferably includes a ring-shaped portion 340 a that provides a variety of gripping portions that the passenger can easily, firmly grip with his/her hands.
- the grab handle 340 may also include a gripping knob 340 b disposed within the opening inside the ring-shaped portion 340 a .
- the passenger may grab onto the gripping knob 340 b or the ring-shaped portion 340 a to help stabilize and actively position himself/herself on the ATV 100 while riding.
- the ring-shaped portion 340 a may function as a hand guard to prevent the passenger's hands from hitting objects such as branches that the ATV 100 brushes by during operation. While the illustrated grab handle 340 includes a ring-shaped portion 340 a and a gripping knob 340 b , a variety of alternatively shaped grab handles may also be used without deviating from the scope of the present invention.
- the ring-shaped portion 340 a of the grab handle 340 is preferably flexible enough that it can deform when a passenger dismounts the secondary seat portion 145 and yet rigid enough that the ring-shaped portion 340 a can provide sufficient support for the passenger.
- the grab handles 340 preferably comprise metal portions that are covered with a resilient material such as rubber or plastic.
- the ring-shaped portion 340 a may be blow molded and hollow so that it provides the needed flexibility and strength.
- the ring-shaped portion 340 a preferably comprises a resilient material such as rubber or plastic.
- the resilient material preferably provides a more comfortable grip for the passenger than a hardened, purely metal, grab handle.
- the grab handles 340 may be heated to provide the passenger with added comfort during cold weather use.
- Electric heating elements (not shown) may be mounted to or in the grab handles 340 and operatively connected to the ATV's electrical system so as to provide the desired electric heating.
- grab handles 340 extend generally horizontally (i.e., their horizontal component is substantially greater than their vertical component) on the ATV 100
- the grab handles 340 could alternatively extend upwardly on either side of the secondary seat portion 245 .
- the location and orientation of such grab handles may be similar to the grab handles described in commonly assigned U.S. Provisional Application Serial No. 60/354,968, titled “QUICK RELEASE PASSENGER SEAT WITH FLEXIBLE GRAB HANDLE,” filed on Feb. 11, 2002, which is incorporated herein by reference in its entirety.
- Such grab handles may still be mounted to the rear rack 130 or to the top of the rear fenders 137 .
- FIG. 10 illustrates alternative grab handles 344 that may replace the grab handles 340 .
- the grab handles 344 each comprise generally U-shaped, tubular members 346 .
- the ends of the U-shaped members 346 extend rearwardly and attach to the front end of the rear rack 130 via bolts, welds, etc.
- the tubular members 346 may comprise metal tubes.
- the forward portion of the U-shaped members 346 are preferably covered with a non-slip coating such as a resilient rubber cover 348 that enables the passenger to comfortably and securely grip the grab handles 344 .
- a gear shift 350 is provided on the left hand of the steering column of the handlebars 134 .
- the gear shift 350 is movable between various positions, including a park position (P), neutral (N), drive (H, L) and reverse (R).
- the two-person ATV 100 may be modified to accommodate three or even more riders on an ATV 400 .
- the two-person ATV 100 may be converted into the three-person ATV 400 by adding a longitudinal extension to the ATV 100 between the main and secondary seat portions 145 .
- a seat 405 of the ATV 400 includes a main seat portion 410 for a driver, a secondary seat portion 420 for a first passenger, and a tertiary seat portion 430 for a second passenger.
- the wheelbase L, the length F, and the length S should each be increased (e.g., by 8 to 15 inches per rider).
- the lateral distance between the wheels 105 , 110 should be set to give comfort and stability to the vehicle. Furthermore, for each additional passenger, the straddle-type seat 139 should include an additional passenger seat portion and the footrests 250 should include an additional, appropriately positioned footrest portion.
- the power unit 215 would be longitudinally positioned to optimize the ATV's center of gravity based on a weighted average of the proportional occupancy time for each seat portion.
- the scope of the present invention is not limited to the combination of every one of the features. Rather, the invention may comprise any combination of one or more of these features (e.g., elongated wheelbase, improved ATV center of gravity, centrally located brake actuating system, passenger seat, passenger seat positioning, driver seat, driver seat positioning, backrest, elongated and/or stepped footrests, side grab handles, low passenger positioning, tapering driver and passenger seat portions, side guards, open storage space on top of the rear rack, facilitation of active positioning for the driver and/or passenger, etc.).
- these features e.g., elongated wheelbase, improved ATV center of gravity, centrally located brake actuating system, passenger seat, passenger seat positioning, driver seat, driver seat positioning, backrest, elongated and/or stepped footrests, side grab handles, low passenger positioning, tapering driver and passenger seat portions, side guards, open storage space on top of the rear rack, facilitation of active positioning for the driver and/or passenger, etc.
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Abstract
An all-terrain vehicle (ATV) includes a frame and a pair of front and rear wheels suspended from the frame. A straddle-type seat has a main portion and a secondary portion to accomodate a driver and a passenger. The straddle-type seat is constructed and arranged such that, in use, a center of gravity of the passenger sitting in a standard riding position on the secondary seat portion is disposed in front of the axis of the rear wheels.
Description
- This application also claims priority to U.S. Provisional Patent Application No. 60/475,511 titled “ATV WITH IMPROVED DRIVER POSITIONING AND/OR MULTI PASSENGER CAPACITY,” filed on Jun. 4, 2003, which is incorporated herein by reference.
- This invention relates to all-terrain vehicles (ATVs), and in particular ATVs in which two riders (a driver and a passenger) can be accommodated. The present invention also relates to the seat positioning of the driver and/or passenger on the ATV.
- Conventionally, the term ATV or all-terrain vehicle has been limited to straddle-seat, wheeled vehicles that are constructed to accommodate just one rider/driver. The Consumer Product Safety Commission uses the one-rider limitation to define “ATV” due to the belief that straddle-seat, wheeled vehicles could not safely accommodate more than one rider.
- As illustrated in FIGS. 11A and 11B, despite numerous warnings that a conventional ATV1000 is designed for just one
driver 1010, in practice, apassenger 1020 often rides on the one-person ATV 1000. Placing tworiders passenger 1020 must uncomfortably squeeze onto the ATV's one-person seat between thedriver 1010 and arear rack 1030. Second, as illustrated in FIG. 11B, afootrest 1040 of the ATV 1000 is similarly designed to only be long enough to accommodate the feet of the one intendedrider 1010. The wheelbase of the ATV 1000 limits the space between front andrear fenders driver 1010 andpassenger 1020 must uncomfortably share the one-person footrest 1040. Third, because thedriver 1010 andpassenger 1020 must be so tightly squeezed together, the legs of thepassenger 1020 inhibit the ability of thedriver 1010 to move, while the body of thedriver 1010 inhibits the ability of thepassenger 1020 to move. Such limited mobility disadvantageously limits the abilities of bothriders passenger 1020 is longitudinally positioned at, near, or even behind arear wheel axis 1070 of theATV 1000 such that the back of thepassenger 1020 is disposed rearwardly of therear wheel axis 1070. Such positioning disadvantageously shifts the combined center of gravity of the ATV 1000 andriders - As illustrated in FIGS. 12A and 12B, a conventional after-
market passenger seat 1100 was developed in an attempt to provide a seat for thepassenger 1020 that can be attached to a conventional one-person ATV like the ATV 1000. While thepassenger seat 1100 provides more longitudinal space for thepassenger 1020, it suffers from many of the same deficiencies encountered when thepassenger 1020 rides on the ATV 1000 without a passenger seat 1100 (as shown in FIGS. 11A and 11B). Furthermore, theseat 1100 creates additional problems for the ATV 1000 andriders passenger 1020 more longitudinal space, theseat 1100 must be shifted far to the rear of the ATV 1000. As illustrated in FIG. 12A, such positioning places the center of gravity of thepassenger 1020 well behind therear wheel axis 1070 of the ATV 1000, which results in a combinedATV 1000 andrider passenger seat 1100 is positioned on top of the conventionalrear rack 1030 of theATV 1000, thepassenger seat 1100 places the center of gravity of thepassenger 1020 in an elevated position on theATV 1000, which further impairs the stability of both thepassenger 1020 and theATV 1000. Furthermore, as illustrated in FIG. 12B, the extremely elevated position of theseat 1100 relative to the driver's seat could cause the knees of thepassenger 1020 to interfere with the elbows of thedriver 1010. Fourth, upwardly extending,rigid sides 1110 of theseat 1100 force the legs of thepassenger 1020 laterally inwardly, which further reduces the mobility of both thedriver 1010 and thepassenger 1020 and impairs their abilities to actively position themselves during operation of the ATV 1000. Still further, placing thepassenger seat 1100 on top of therear rack 1030 disadvantageously eliminates the storage space on therear rack 1030. While thepassenger seat 1100 opens up to provide a small, internal storage compartment, such a storage compartment is quite limited as compared to the large, open space provided above therear rack 1030 when thepassenger seat 1100 is removed. - Amacker (U.S. Pat. No. 4,247,030) discloses a passenger seat for an ATV that is similar to the after-
market passenger seat 1100 illustrated in FIGS. 12A and 12B and suffers from many of the same shortcomings. As illustrated in FIG. 3 of Amacker, the passenger's center of gravity is disposed well behind the rear axis and therefore disadvantageously increases the risk of rearward rollover of the ATV. Furthermore, both the passenger's legs and feet and the driver's legs and feet must be disposed at the same longitudinal position on the ATV, which causes the driver and the passenger to interfere with each other's mobility and thereby inhibit their ability to actively position themselves - The inventors of the present invention determined that if multiple riders are going to ride ATVs that are designed for one rider despite all contraindications and/or other warnings, then ATVs should be constructed to safely accommodate multiple riders.
- Accordingly, through the present invention, the inventors resolved safety concerns of the industry regarding multi-person ATVs.
- Accordingly, one aspect of embodiments of the invention provides an ATV that can safely accommodate two riders (a driver and a passenger). For example, the wheelbase of the ATV can be extended (e.g., by about 8″ to 12″ or more) compared to conventional ATVs such that the driver is more centered between the front and rear wheels, which creates additional space to accommodate an additional rider behind the driver. An advantage to this structure is that the driver's riding position is more active and comfortable, and the passenger can be accommodated in a safe manner.
- Another aspect of embodiments of the invention provides an ATV on which a single rider, i.e., the driver, can be placed in a position that is more centered between the front and rear pairs of wheels, thereby improving driver comfort and/or reducing the chances for roll-over of the ATV.
- Another aspect of embodiments of the present invention provides a two-person ATV that allows the driver and passenger to actively position themselves during operation of the ATV.
- Another aspect of embodiments of the invention provides an ATV including a frame and four wheels suspended from the frame, two of which are rear wheels and two of which are front wheels; the front wheels define a front axis and the rear wheels define the rear axis and each of the wheels includes an ATV-type tire. The ATV also includes a power unit for driving at least one of the wheels disposed on the frame and a straddle-type seat supported by the frame including a main seat portion for a driver and a secondary seat portion, rearward of the main portion, for a standard passenger. The ATV also includes a steering member connected to the frame comprising a handlebar for steering at least one of the wheels. The straddle-type seat is constructed and arranged such that, in use, a center of gravity of the passenger sitting in a standard riding position on the secondary seat portion is disposed in front of the rear axis.
- Another aspect of the embodiments of the invention provide an ATV wherein the distance between the front and the rear axes is between 52 and 72 inches.
- Still other aspects of the embodiments of the invention provide ATVs wherein the straddle-type seat is constructed and arranged such that, in use, the center of gravity is disposed in front of the rear axis by between 1 and 19 inches, by between 4 and 19 inches or by between 5 and 19 inches.
- Other aspects of the embodiments of the invention provide ATVs wherein the straddle-type seat is constructed and arranged such that, in use, a ratio of a distance between the front axis and the center of gravity to a distance between the center of gravity and the rear axis is less than 13, is less than 11, may be less than 9, and may be between 2 and 13.
- Another aspect of the embodiments of the invention provide an ATV including a frame and four wheels suspended from the frame, two of which being rear wheels and two of which being front wheels; the front and rear wheels have front and rear axes and each of the wheels includes an ATV-type tire. The ATV also includes a power unit for driving at least one of the wheels disposed on the frame and a straddle-type seat including a main seat portion for a driver and a secondary seat portion, rearward of the main portion, for a passenger. The ATV also includes a steering member connected to the frame and including a handlebar for steering at least one of the wheels. The straddle-type seat is constructed and arranged such that, in use, a center of gravity of the driver sitting in a standard riding position on the main seat portion is disposed in front of the rear axis by at least 13 inches.
- Another aspect of the embodiments of the invention provide an ATV wherein the distance between the front and the rear axes is between 52 and 72 inches. Another aspect of the embodiments of the invention provide an ATV wherein the straddle-type seat is constructed and arranged such that, in use, the center of gravity is disposed in front of the rear axis by at least 15 inches, by at least 19 inches or by between 21 and 30 inches.
- Additional and/or alternative aspects of the embodiments of the present invention will be described in or apparent from the following description of the preferred embodiments.
- FIG. 1 is a left side view of an ATV according to a preferred embodiment of the present invention;
- FIG. 2A is a perspective view of the rear, left side of the ATV shown in FIG. 1;
- FIG. 2B is a rear view of the ATV shown in FIG. 1;
- FIG. 3A is a perspective view of the top, left side of the ATV shown in FIG. 1;
- FIG. 3B is a top left partial perspective view of the seat of the ATV shown in FIG. 1;
- FIG. 3C is a forward left partial perspective view of a backrest of the ATV shown in FIG. 1;
- FIG. 3D is a right perspective view of the backrest of the ATV shown in FIG. 1;
- FIG. 4A is a partial left side view of a left passenger grab handle of the ATV shown in FIG. 1;
- FIG. 4B is a partial top view of the left passenger grab handle of the ATV shown in FIG. 1;
- FIG. 4C is a partial perspective view of the left passenger grab handle of the ATV shown in FIG. 1;
- FIG. 5A is a partial perspective view of the top and side of a left footrest of the ATV shown in FIG. 1;
- FIG. 5B is a partial top perspective view of the left footrest of the ATV shown in FIG. 1;
- FIG. 5C is a left side view of the left footrest of the ATV shown in FIG. 1;
- FIG. 6 is a partial top view of the ATV shown in FIG. 1 with the seat removed;
- FIG. 7 is a partial perspective view taken from the top, rear side of the ATV shown in FIG. 1 with the seat removed;
- FIG. 8 is a side view of the ATV shown in FIG. 1 with comparative centers of gravity of various components of the ATV shown in FIG. 1 and of the conventional ATVs shown in FIGS.11A-12B;
- FIG. 9 is a partial cut away side view of the ATV shown in FIG. 1 illustrating the power unit;
- FIG. 10 is a partial perspective view of the ATV of FIG. 1 with a back rest and grab handles according to an alternative embodiment of the present invention;
- FIG. 11A is a left side view of two riders riding a conventional one-person ATV;
- FIG. 11B is a forward left partial perspective view of the riders and ATV shown in FIG. 1A;
- FIG. 12A is a left side view of two riders riding a conventional one-person ATV with an after market passenger seat attached thereto;
- FIG. 12B is a forward left partial perspective view of the two riders and ATV shown in FIG. 12A;
- FIG. 13 illustrates a front elevational view of a standard rider;
- FIG. 14 illustrates a side elevational view of the standard rider illustrated in FIG. 13; and
- FIG. 15 is a left side view of a three person ATV according to an alternative embodiment of the present invention.
- FIGS.1-9 show an
ATV 100 according to a preferred embodiment of the present invention. - Throughout this description, unless otherwise expressly stated, all dimensions and relationships between elements are measured when the
ATV 100 is unloaded (i.e., without riders or baggage), has a full oil reservoir and tank of fuel, is on level ground, and is steered straight forward. Furthermore, unless otherwise indicated, the driver and passenger have the weight and dimensions of a standard rider. The standard rider is a 50th percentile human male who weighs 78 kg and has the dimensions illustrated in FIGS. 13 and 14. - Throughout this description, the term ATV shall not be limited to the conventional one-rider definition. Rather, the
ATV 100 is still referred to as an ATV despite the fact that it is designed to accommodate a driver and a passenger, and could be designed to accommodate a driver and multiple passengers. Moreover, theATV 100 is designed to comfortably accommodate just the driver as well. - As shown in FIG. 1, the
ATV 100 includes aframe 102 that supports a pair of laterally-spaced,front wheels 105 and a pair of laterally-spaced,rear wheels 110. Thewheels - A wheelbase L, defined between the axes of
rotation wheels - If greater than four wheels are provided on the
ATV 100, the wheelbase L should be measured over the longest longitudinal span between longitudinally adjacent axes. For example, if the ATV comprises six wheels (three pairs of longitudinally spaced wheels), the wheelbase L should be measured as the longer of (a) the distance between the front and middle pairs of wheels, and (b) the distance between the middle and rearward pairs of wheels. Similarly, the front and rear wheels are defined as the most-longitudinally-spaced-apart, longitudinally adjacent wheels. Consequently, “front” and “rear” wheels are defined relative to each other and not relative to additional wheels that may also be present on the ATV. - The
frame 102 is similar to a conventional ATV frame except that theframe 102 is extended to provide for the extended wheelbase L. Additional longitudinal structural elements may be added to theframe 102 to strengthen theframe 102 over the extended gap between thewheels - As shown in FIG. 1, the illustrated
ATV 100 has a ground clearance G, which is similar to the ground clearance of conventional ATVs. The ground clearance G is defined by the vertical distance between the ground and the lowest point on theframe 102 and is preferably about 10 inches. However, as the wheelbase L elongates more and more, a change in ground clearance should be further considered. For example, if the wheelbase L is extended further, the ground clearance G should be increased accordingly. - While the illustrated
ATV 100 includes fourwheels ATV 100 could alternatively include just three wheels (e.g., two rear wheels and a single front wheel or two front wheels and a single rear wheel). Thefront wheels 105 are suspended from theframe 102 by anappropriate front suspension 106, while therear wheels 110 are suspended from theframe 102 by an appropriaterear suspension 111. TheATV 100 includes afront bumper 115 and arear bumper 120, and afront rack 125 and arear rack 130. A steering member, e.g., a pair ofhandlebars 134, is positioned just behind thefront rack 125 and is operably coupled to thefront wheels 105 for steering purposes. TheATV 100 includesfront fenders 135 positioned above thefront wheels 105 andrear fenders 137 positioned above therear wheels 110. - As best illustrated in FIGS. 2A, 3A,3C and 3D, the
rear rack 130 preferably comprises a plurality of interconnected, elongated members, which are preferably tubular. Arear member 130 a defines a rearward end of therear rack 130. Similarly,side members 130 b define the outer lateral sides of therear rack 130. A plurality ofinterior members 130 c are also provided. It should be noted, however, that the structure of therear rack 130 may be modified or therear rack 130 may be eliminated entirely without deviating from the scope of the present invention. - As illustrated in FIGS. 1, 2A,3A, and 3B, the
ATV 100 includes a straddle-type seat 139 that includes amain seat portion 140 and asecondary seat portion 145, which are connected together with atransition 142, which may provide a definite dividing line between the main andsecondary seat portions transition 142 angles upwardly at approximately a 45 degree angle from themain seat portion 140 to thesecondary seat portion 145, thetransition 142 generally provides a rear portion to themain seat portion 140 that tends to discourage the driver (i.e., the person sitting in the main seat portion 140) from sliding rearwardly onto thesecondary seat portion 145. Alternatively, aprecise transition 142 may be eliminated altogether such that the main andsecondary seat portions secondary seat portions seat 139 has two separated portions. - Because the
seat 139 is a two-person seat rather than a conventional one-person seat, a longitudinal length S of theseat 139 formed between aforward end 140 a of themain seat portion 140 and arearward end 145 a of thesecondary seat portion 145 a is significantly longer than in the prior art. The length S is preferably between 30 and 60 inches, is more preferably between 31 and 50 inches, is even more preferably between 32 and 45 inches, and is even more preferably about 37 inches. - The
forward end 140 a of theseat 139 is defined as a point that is slightly rearward (preferably 2-5 inches) of the rear end of thehandlebars 134. Theforward end 140 a is also preferably disposed slightly forward or at the same longitudinal position as aheel stop 280 of afootrest 250. Alternatively, ifhandlebars 134 are not provided or do not reasonably define theforward end 140 a of the seat, theforward end 140 a is defined as the forwardmost longitudinal position on theseat 139 that is designed to support any portion of the driver. While the vast variation in conventional seat styles and shapes makes it difficult to precisely define theforward end 140 a of a seat of every different ATV without specific reference to each different seat style, a forward end of a seat of any ATV is readily determinable by one of ordinary skill in the art. - The
rearward end 145 a of theseat 139 is defined by a longitudinal position of aforward surface 150 a of aback rest 150 of theATV 100. However, if aback rest 150 is not provided on theATV 100, therearward end 145 a is quantitatively defined by the rearwardmost longitudinal position on theseat 139 that is designed to support any portion of the passenger. - As illustrated in FIG. 3D, the
rearward end 140 a of the seat and/or theforward surface 150 a of theback rest 150 are preferably disposed in front of a majority of therear rack 130 so that they do not interfere substantially with an open storage space provided on top of therear rack 130. Accordingly, therearward end 140 a and theforward surface 150 a are preferably disposed in front of aback side 130 a of the rear rack by a horizontal distance J, which is preferably between 5 and 20 inches, is more preferably between 8 and 20 inches, is even more preferably between 10 and 20 inches, and is even more preferably between 14 and 20 inches. Because theback side 130 a of the rear rack is generally longitudinally aligned with a rear end of theATV 100 as a whole, therearward end 140 a and theforward surface 150 a bear the same or similar relationship to the rear end of theATV 100 as they do to theback side 130 a of therear rack 130. - The
main seat portion 140 accommodates a standard driver in a standard driving position while theATV 100 is headed straight forward (i.e., to the left as illustrated in FIG. 1) on flat terrain. Themain portion 140 is positioned behind thefront wheel axis 105 by approximately the same longitudinal extent as a conventional rider seat on a conventional ATV. - As illustrated in FIGS. 1 and 3B, the
main seat portion 140 includes a main supportingrange 140 b, which is defined on the upper surface of themain seat portion 140 by a range of positions of a center of the weight distribution on themain seat portion 140 of a driver who is sitting on themain seat portion 140 in an operating position. Accordingly, a center of the main supporting range is preferably longitudinally disposed at the same point as the center ofgravity 520 of the driver (as shown in FIG. 8 and described in greater detail below). Of course, they could be different, if desired and depending on the layout of the other components of theATV 100 such as theengine 215. Themain supporting range 140 b is generally centered at a lateral center of themain seat portion 140 two thirds of the way back on themain seat portion 140 from theforward end 140 a (i.e. positioned behind theforward end 140 a by two thirds of the longitudinal length of themain seat portion 140, which is defined generally as a distance M between theforward end 140 a and the uppermost edge of the transition/rear end 142 of the main seat portion 140). However, if themain seat portion 140 were shaped differently, the main supporting range may be located at a different relative position on themain seat portion 140. Themain supporting range 140 b preferably extends forwardly and rearwardly from its center by about 5 inches. - The center of the main supporting
range 140 b is disposed longitudinally rearwardly from thefront wheel axis 107 by a distance T, which is preferably about 40-80% of the wheelbase L, is more preferably about 45-70% of the wheelbase L, and is even more preferably about 55-65% of the wheelbase L. Conversely, the center of the main supportingrange 140 b is disposed in front of therear wheel axis 108 by a distance that is preferably about 20-60% of the wheelbase L, is more preferably about 30-55% of the wheelbase L, and is even more preferably about 35-45% of the wheelbase L. In absolute terms, the center of the main supportingrange 140 b is positioned in front of therear wheel axis 108 by a distance L minus T, which is preferably between 21 and 30 inches, and is more preferably about 21.6 inches. In an alternative embodiment, distance L minus T is preferably about 22-30 inches, and is more preferably about 24-27 inches. - As illustrated in FIG. 8 and discussed in greater detail below, the position of the
main seat portion 140 places the driver closer to the center of the wheelbase L than in conventional ATVs. Positioning the driver close to the center of the wheelbase L of theATV 100 advantageously improves the driver's comfort. This positioning may also improve the handling of theATV 100 due to the driver's active positioning. - The
secondary portion 145 is designed to accommodate a passenger in a standard riding position. Asecondary supporting range 145 b is disposed on thesecondary seat portion 145 and is defined in the same manner as the main supportingrange 140 a. A longitudinal length N of thesecondary seat portion 145 is preferably 5% to 45% shorter than the length M of themain seat portion 140, but could alternatively be the same as the length M or even longer than the length M. - As illustrated in FIGS.1-3D, a
back rest 150 is provided behind thesecondary portion 145 to help support the back of the passenger. Theback rest 150 also deters additional unauthorized passengers from riding theATV 100. Theback rest 150 mounts on apost 152 that attaches to therear rack 130 or directly to theframe 102. As shown in FIG. 3D for the illustrated embodiment, thepost 152 is bent at its lower end and includes aslot 153 through which a plurality ofbolts 154 extend to attach thepost 152 to therear rack 130. Theslot 153 allows the longitudinal position of theback rest 150 to be adjusted. However, other longitudinal adjustment mechanisms may alternatively be used. Although not shown, theback rest 150 is adapted to accommodate a standard sized passenger, but may also be vertically adjustable to accommodate different sized passengers. - The post152 (or some other part) of the
backrest 150 is preferably designed such that thebackrest 150 may deflect forwardly and rearwardly by several inches (e.g., 3 to 4 inches) during normal operation when subjected to a longitudinal load. This deflection enables thebackrest 150 to more comfortably accommodate the passenger's back. Thepost 152 may comprise a resilient material such as spring steel that creates the desired flexibility. - While the illustrated back
rest 150 utilizes just one centrally-positionedsupport post 152, the back rest could be attached to theATV 100 in a variety of other manners as well. For example, FIG. 10 illustrates analternative back rest 160 that may mount onto theATV 100 instead of theback rest 150. Theback rest 160 is mounted to theATV 100 via two laterally-spaced support posts 162 that extend between opposite lateral sides of theback rest 160 and a structural portion of theATV 100 such as theframe 102 or therear rack 130. As illustrated in FIG. 10, a forward back-supportingsurface 160 a of theback rest 160 arches rearwardly in its middle portion such that a middle of thesurface 160 a is disposed rearwardly of the lateral sides of thesurface 160 a. - A back-supporting forward surface150 a is adapted to support and rest against a back of the passenger. The
forward surface 150 a is preferably disposed in front of theaxis 108 of therear wheels 110 by a distance B. However, theforward surface 150 a could alternatively be disposed behind therear axis 108 if other components are moved, the danger of rollover is minimized, and/or the dynamic handling of the ATV is not significantly adversely affected. The distance B is preferably greater than zero, is more preferably between ½ and 10 inches, and is even more preferably between about ½ and 3 inches. Alternatively, the distance B may preferably be between about 1 and 10 inches, and more preferably between about 1 and 3 inches. Similarly, theforward surface 150 a is preferably disposed in front of a majority of, if not all of, therear rack 130. Accordingly, theback rest 150 does not significantly, if at all, interfere with the storage space above the rear rack 130 (i.e., therear rack 130 is usable even when theback rest 150 is attached to the ATV 100). Furthermore, theforward surface 150 a is preferably disposed at generally the same longitudinal position along theATV 100 as arearward end 145 a of thesecondary seat portion 145. Accordingly, therearward end 145 a of thesecondary seat portion 145 and theforward surface 150 a preferably bear the same or similar longitudinal relationships to theaxis 108 andrear rack 130. - As shown in FIGS. 1 and 3B, a
secondary supporting range 145 b of thesecondary seat portion 145 is disposed farther forward relative to therear wheel axis 108 on theATV 100 than the after-market passenger seat on conventional ATVs (as described above), which are disposed behind the driver's seat. Accordingly, as illustrated in FIG. 8 and discussed in greater detail below, a passenger on thesecondary seat portion 145 of theATV 100 is positioned closer to the center ofgravity 500 of theATV 100 than passengers on conventional aftermarket passenger seats of conventional ATVs. Placing the passenger closer to the center of the wheelbase L of theATV 100 improves the passenger's comfort and reduces the risk of roll-over. Furthermore, because the forward positioning of thesecondary seat portion 145 places the center ofgravity 550 of the passenger between the front and rear wheel axes 107, 108, the passenger's weight is more evenly distributed over the wheelbase L of theATV 100 than in conventional aftermarket passenger seats, where a center ofgravity 570 of a passenger might disadvantageously be positioned behind therear wheel axis 108. - The
secondary seat portion 145 should be disposed high enough above therear wheel axis 108 that it does not interfere with therear wheels 110 and/orrear fenders 137. Accordingly, thesecondary seating range 145 b of thesecondary seat portion 145 is preferably disposed higher than therear wheel axis 108 by a distance R. (see FIG. 1). The distance R is preferably between 20 and 35 inches, and is more preferably about 25 inches. In an exemplary embodiment, if thewheels secondary seat portion 145 would be disposed above the ground by about 38 inches. - The
secondary seat portion 145 is disposed lower on theATV 100 than conventional aftermarket passenger seats on conventional ATVs. The lower positioning is possible because thesecondary seat portion 145 is disposed in front of therear rack 130 and/orrear wheels 110, instead of directly over the rear wheels or even behind the rear wheels as in the prior art. Accordingly, therear wheels 110 andrear fenders 137 interfere less with thesecondary seat portion 145 than the rear wheels and fender of a conventional ATV interfere with conventional aftermarket passenger seats. As illustrated in FIG. 8 and discussed in greater detail below, because thesecondary seat portion 145 is lower than conventional aftermarket passenger seats, the center ofgravity 550 of a passenger on thesecondary seat portion 145 of theATV 100 is lower than the center ofgravity 570 of a passenger on a prior art passenger seat. Lowering the passenger's center ofgravity 550 advantageously improves the passenger's comfort, as well as the performance of theATV 100. - The
main supporting range 140 b is disposed below the secondary supportingrange 145 b by a vertical height H. The height H is preferably between 0 and 8 inches, is more preferably between 1 and 4 inches, and is even more preferably about 2 inches. While the height H is preferably greater than 1 inch, the height H should be limited. If the height H is too large, the passenger's knees may interfere with the elbows of the driver and inhibit the driver's ability to steer theATV 100. To avoid this problem, the height H is preferably less than 8 inches and is more preferably less than 4 inches. The height H may alternatively be zero (or even negative) such that the main and supportingranges - As illustrated in FIGS. 1 and 3B, the center of the main supporting
range 140 b is longitudinally spaced from the center of the secondary supportingrange 145 b by a distance Q, which is preferably about 8 to 20 inches, is more preferably about 12 to 17 inches. The distance Q provides adequate longitudinal space for both the driver and the passenger such that the riders to not significantly interfere with each other. The distance Q provides adequate longitudinal space for the riders to comfortably and actively position themselves. - As best illustrated in FIG. 3B, forward parts of both the main and
secondary seat portions secondary seat portion 145 is preferably narrower than a rearward part of themain seat portion 140. The wider rearward parts of theseat portions seat portions ATV 100. In this situation, the inward taper of the forward parts of the right side of theseat portions - FIG. 6 is a partial top view of the
ATV 100 with theseat 139 removed to expose thepower unit 215, which in this embodiment comprises an internal combustion engine. Thepower unit 215 is operatively connected to at least one of thewheels more driveshafts 216 to power theATV 100. Thepower unit 215 is preferably operatively connected to all thewheels - To maximize the comfort of the ATV riders (driver and passenger) and improve the dynamic behavior of the
vehicle 100, the center of gravity of the riders andvehicle 100 should be located properly. To achieve this maximum comfort, the riders (driver and passenger) should be located as close as possible to the center of the wheelbase L. This positioning enables the riders to naturally pivot between the front andrear wheels ATV 100. The comfort provided by such passenger positioning is best illustrated with reference to a school bus, in which a person sitting in the back of the bus is far away from the bus's wheelbase center and experiences significant jostling as the bus pivots over bumps. Accordingly, the combined center of gravity of the vehicle, driver, and passenger should each be close to the center of the wheelbase L of theATV 100 in order to obtain dynamic behavior that is as neutral as possible. - FIG. 8 comparatively illustrates the centers of gravity of an
exemplary ATV 100, driver, and passenger relative to the centers of gravity of (1) theconventional ATV 1000, its driver, and an unauthorized passenger (as shown in FIGS. 11A and 11B), and (2) theconventional ATV 1000, its driver, and a passenger sitting in the after market passenger seat 1100 (as shown in FIGS. 12A and 12B). All positions are shown relative to the rear axis of therelevant ATV exemplary ATV 100 is shown in phantom to provide perspective to the various positions. In theexemplary ATV 100 illustrated in FIG. 8, the wheelbase L is about 61 inches, the distance R is about 25 inches, the distance H is about 2 inches, the distance B is about ¾ of an inch, and the distance S is about 37 inches (see dimensions in FIG. 1). - As illustrated, an
ATV 100 center ofgravity 500 is horizontally disposed in front of theaxis 108 by a distance AxR, which is preferably between 26 and 35 inches, is more preferably between 27 and 34 inches, and is even more preferably about 29 inches. Conversely, a center ofgravity 510 of theATV 1000 is only disposed 25 inches in front of the rear wheel axis 1070 (see FIG. 11A). - In one embodiment of the present invention, a ratio of a horizontal distance AxR between the
rear axis 108 and the center ofgravity 500 of theATV 100 to the distance L is preferably between 0.25 and 0.75, is more preferably between 0.4 and 0.6, and is even more preferably between about 0.45 and 0.55. - In an alternative embodiment of the present invention, a ratio of a horizontal distance AxF between the
front axis 107 and the center ofgravity 500 of theATV 100 to the distance AxR (between the center ofgravity 500 and the rear axis 108), which equals the distance L divided by the distance AxR minus one, is preferably between 1.05 and 2, is more preferably greater than 1.07, is even more preferably greater than 1.09, is even more preferably greater than 1.1, and is even more preferably about 1.12. - The center of
gravity 500 is disposed above therear wheel axis 108 by a distance Ay, which is preferably between about 0 and 10 inches, and is more preferably about 7 inches. In an alternative embodiment, the distance Ay is about 5 inches. - As illustrated in FIG. 9, an angle αR is formed between the
front wheel axis 107, therear wheel axis 108, and the center ofgravity 500. Similarly, an angle αF is formed between therear wheel axis 108, thefront wheel axis 107, and the center ofgravity 500. The angles αR and αF are preferably less than 20 degrees and more preferably about 15 degrees. The angle αR may alternatively be about 10 degrees. The angle αF may alternatively be about 9 degrees. A line that forms the base of the angles αR, αF and extends between the front andrear axes rear wheels front wheel 105 has a 25 inch diameter while therear wheel 110 has a 26 inch diameter. - As illustrated in FIG. 8, a center of
gravity 520 of the driver sitting on themain seat portion 140 of theATV 100 is horizontally disposed in front of theaxis 108 by a distance DxR, which is preferably between 13 and 30 inches, is more preferably between 15 and 30 inches, is even more preferably between 19 and 30 inches, and is even more preferably about 22 inches. Conversely, the driver on theATV 1000 without apassenger seat 1100, who is squished forwardly to provide space for thepassenger 1020 as shown in FIG. 11A, has a center ofgravity 530 that is only disposed about 19 inches in front of therear wheel axis 1070. Similarly a center ofgravity 540 of the driver on theATV 1000 with the passenger seat 1100 (as shown in FIG. 12A) is only disposed about 12 inches in front of theaxis 1070. Accordingly, FIG. 8 illustrates that the elongation of theframe 102 and wheelbase L of theATV 100 enable the driver on theATV 100 to be positioned farther in front of therear wheel axis 108 than on conventional ATVs. - The center of
gravity 520 is disposed above therear wheel axis 108 by a distance Dy, which is preferably between about 10 and 35 inches, is more preferably between 15 and 35 inches, and is even more preferably about 22 inches. - As illustrated in FIG. 9, an angle δR is formed between the
front wheel axis 107, therear wheel axis 108, and the center ofgravity 520. An angle δF is formed between therear wheel axis 108, thefront wheel axis 107, and the center ofgravity 520. The angles δR and δF are preferably between 30 and 60 degrees, are more preferably between 30 and 51 degrees, and are even more preferably about 45 degrees. In an alternative embodiment, the angle δF is preferably between 15 and 45 degrees, is more preferably between 15 and 33 degrees, and is even more preferably about 32 degrees. - A center of
gravity 550 of the passenger sitting on thesecondary seat portion 145 of theATV 100 is horizontally disposed in front of therear axis 108 by a distance PxR, which is preferably greater than zero, is more preferably between 1 and 19 inches, is even more preferably between 4 and 15 inches, and is even more preferably about 7 inches. Conversely, a center ofgravity 560 of the unauthorized passenger on theATV 1000 without the passenger seat (as shown in FIG. 11A) is only disposed about 4 inches in front of therear axis 1070. A center ofgravity 570 of the passenger on the passenger seat 1100 (as shown in FIG. 12A) is actually disposed behind therear axis 1070 by about 6 inches. Accordingly, FIG. 8 illustrates that the elongation of theframe 102 and wheelbase L and the positioning of thesecondary seat portion 145 enable the passenger on theATV 100 to be disposed farther forward on theATV 100 than on conventional ATVs. Such positioning improves the stability and comfort of the passenger on theATV 100. - A ratio of a distance PxF between the
front axis 107 and the center ofgravity 550 of the passenger on theATV 100 to the distance PxR (between the center ofgravity 550 and the rear axis 108), which equals the distance L divided by the distance PXR minus one, is preferably between 2 and 13, is more preferably between 2 and 11, is even more preferably between 2 and 9, and is even more preferably about 8. Similarly, a ratio of the distance between thefront axis 107 and center of the secondary supportingrange 145 b to the distance between the center of the secondary supportingrange 145 b and therear axis 108 is preferably between 2 and 50, is more preferably between 2 and 40, is even more preferably between 2 and 30, and is even more preferably between 10 and 20. - The center of
gravity 550 is disposed above therear wheel axis 108 by a distance Py, which is preferably between about 20 and 40 inches, and is more preferably about 27 inches. - As illustrated in FIG. 9, an angle πR is formed between the
front wheel axis 107, therear wheel axis 108, and the center ofgravity 550. The angle RR is preferably between 60 and 90 degrees, is more preferably between 70 and 80 degrees, and is even more preferably about 76 degrees. An angle πF is formed between therear wheel axis 108, thefront wheel axis 107, and the center ofgravity 550. The angle πF is preferably between 15 and 45 degrees, is more preferably between 15 and 30 degrees, and is even more preferably about 27 degrees. - When both a driver and a passenger ride the
ATV 100, a combined center ofgravity 580 of theATV 100 and the two riders is horizontally disposed in front of therear axis 108 by about 25 inches. Conversely, when two riders ride theATV 1000 without a passenger seat 1100 (as shown in FIG. 11A), a combined center of gravity 590 is only disposed about 21 inches in front of therear axis 1070. Similarly, when two riders ride theATV 1000 with a passenger seat 1100 (as shown in FIG. 12A), a combined center ofgravity 600 is only disposed about 19 inches in front of therear axis 1070. - Similarly, the combined center of
gravity 580 is preferably disposed rearwardly of thefront axis 107 by a distance CxF that is preferably between 25 and 50 inches, is more preferably between 30 and 45 inches, is even more preferably between 33 and 45 inches, is even more preferably between 34 and 45 inches, and is even more preferably about 36 inches. - The combined center of
gravity 580 is preferably disposed above therear wheel axis 108 by a distance Cy, which is preferably between 5 and 20 inches, and is more preferably by about 11 inches. - As illustrated in FIG. 9, an angle κR is formed between the
front wheel axis 107, therear wheel axis 108, and the combined center ofgravity 580. The angle κR is preferably between 15 and 45 degrees, is more preferably between 15 and 35 degrees, and is even more preferably about 30 degrees. In an alternative embodiment, the angle κR is preferably between 15 and 30 degrees, is more preferably between 15 and 25 degrees, and is even more preferably about 24 degrees. An angle κF is formed between therear wheel axis 108, thefront wheel axis 107, and the combined center ofgravity 580. The angle κF is preferably between 10 and 45 degrees, is more preferably between 10 and 30 degrees, is even more preferably between 15 and 30 degrees, and is even more preferably about 20 degrees. In an alternative embodiment, the angle κF is preferably between 10 and 18 degrees, and is more preferably about 17 degrees. - As illustrated in FIGS. 1, 6, and9, the
power unit 215 is located in front of therear wheel axis 108 by a distance E. The distance E is preferably about 22 to 40 inches and is more preferably about 24 to 38 inches. In an alternative embodiment, the distance E is preferably about 22-30 inches, and is more preferably about 24-27 inches. Because thepower unit 215 is preferably disposed at generally the same longitudinal position on theATV 100 as the main supportingrange 140 b, the distances E plus T equal the wheelbase L. However, such a relationship between thepower unit 215 and the main supportingrange 140 b is not required. Furthermore, a ratio of the distance E to the distance L is preferably between 0.25 and 0.75 and is more preferably between 0.4 and 0.6. - The centers of gravity of the riders are measured when the riders are seated on their respective seat portions in standard riding positions. As would be appreciated by those of ordinary skill in the art, when in a standard riding position, the driver's feet are placed on the footrests, the driver is sitting on the
seat portion 140, and the driver's hands are grabbing thehandlebars 134 of other steering device. Similarly, the passenger's feet are placed on the footrests, the passenger is sitting on theseat portion 145, and the passenger's hands are holding onto the passenger grab handles, if provided. The standard driver and passenger have the weight and dimensions of a 50th percentile human male, which are illustrated in FIGS. 13 and 14. - Because the
power unit 215, which is among the heaviest components on theATV 100, is disposed in front of therear axis 108 by the distance E, and the wheelbase L of theATV 100 is longer than on conventional ATVs, the center ofgravity 500 of theATV 100 is shifted proportionally rearwardly relative to wheelbases of conventional ATVs. Accordingly, the center ofgravity 500 of theATV 100 is shifted rearwardly and is therefore closer to the main and secondary supporting ranges 140 b, 145 b (and consequently closer to the centers ofgravity power unit 215 is preferably disposed longitudinally rearwardly from theforward end 140 a of themain seat portion 140 of theATV 100. - To optimize the comfort of the riders and the dynamic performance of the
ATV 100, the combined center ofgravity 580 should be as centered on the wheelbase L as possible. If the center of gravity of thevehicle 500 is centered on the wheelbase L, the center of gravity of thedriver 520 and thepassenger 550 should be as close to the center of the wheelbase L as possible. Because it is difficult to simultaneously center each of the driver, passenger, andATV 100 on the wheelbase L, theATV 100 should be designed so that the center the combined center ofgravity 580 is positioned as close to the center of the wheelbase L as possible. It is anticipated that a single rider (the driver) will ride theATV 100 about 70% of the time and two riders (the driver and the passenger) will ride the ATV about 30% of the time. Accordingly, the center ofgravity 500 of theATV 100 is preferably positioned such that when a combined center ofgravity 580 is determined using a percentage-of-use-based weighted average of the positions and weights of the driver and passenger, the combined center ofgravity 580 is positioned as close to the center of the wheelbase L as possible. - In an alternative embodiment of the present invention, the dynamic characteristics of the
ATV 100 and comfort of the driver and passenger may be improved by positioning the center ofgravity 500 of theATV 100 as close as possible to the centers ofgravity gravity 500 of theATV 100 could be moved part way between the centers ofgravity gravity 500 being determined by the weighted average of the percentage of use of theATV 100 in one-rider and two-rider modes. The main and secondary supporting ranges 140 b, 145 b are reasonably close to the longitudinal positions of the centers ofgravity ATV 100. Accordingly, the centers of the supportingranges gravity 500 of theATV 100. In other embodiments, the centers ofgravity ranges gravity ranges - In this alternative embodiment, the center of
gravity 500 of theATV 100 is preferably longitudinally positioned between the supportingranges range 140 b by about 30% of the distance Q between the centers of the supportingranges ATV 100 is preferably disposed closer to the main supportingrange 140 b than to the secondary supportingrange 145 b because a driver rides theATV 100 70% more often than a passenger. In this alternative embodiment, thepower unit 215 may be shifted further rearward in order to shift the center ofgravity 500 of theATV 100 farther rearward. - In conventional ATVs, a hydraulic brake actuating system is typically provided rearwardly of the power unit. Such positioning is convenient because it is close enough to the footrest to conveniently provide a mechanical connection between a foot brake pedal and the hydraulic brake actuating system. Conversely, in the
ATV 100, a front (or main)footrest portion 260 of afootrest 250 of theATV 100, which is described in greater detail below, is disposed in front of thepower unit 215, which places the frontfoot rest portion 260 well forward of the conventional position of the hydraulic brake actuating system. - Accordingly, to simplify the mechanical connection between the foot brake pedal and the hydraulic brake actuating system, a hydraulic
brake actuating system 217 of theATV 100 is disposed in front of the power unit 215 (see FIGS. 6 and 7). As best shown in FIG. 7, thesystem 217 includes amaster cylinder 220 operatively connected viahydraulic lines 221 to conventional hydraulic brakes (not shown) that are connected to one or more of thewheels master cylinder 220 includes mating cylinder andpiston portions master cylinder 220 extends in a direction that is generally perpendicular to the longitudinal direction of theATV 100. As best seen in FIG. 6, themaster cylinder 220 is angled slightly downwardly such that thepiston portion 220 b is disposed below thecylinder portion 220 a. Thecylinder portion 220 a is mounted (via bolts or other fasteners) to a portion of theframe 102. - A
swing arm 223 is also pivotably connected at afirst end 223 a to theframe 102 for relative pivotal movement about aswing arm axis 224 that extends in the longitudinal direction of theATV 100. Asecond end 223 b of theswing arm 223 is pivotably connected to thepiston portion 220 b such that pivotal movement of theswing arm 223 actuates themaster cylinder 220. A hand brake lever 226 (see FIG. 1) is operatively connected to thesecond end 223 b of theswing arm 223 via a flexible sheathed cable 225 (see FIG. 7). A laterally-extendingfoot brake 227 attaches (preferably via a weld) to thefirst end 223 a of theswing arm 223 for common pivotal movement-about theswing arm axis 224 relative to theframe 102. As illustrated in FIGS. 6 and 7, thefoot brake 227 includes afoot pedal 227 a that is conveniently disposed above a right,front portion 260 of aright footrest 250. Atension spring 228 connects between thefoot brake 227 and a portion of theframe 102 to bias thefoot brake 227 upwardly and thereby bias thesecond end 223 b andpiston portion 220 b to the left as illustrated in FIG. 7. - As shown in FIG. 7, to actuate the brakes of the
ATV 100, the driver can either squeeze thehand brake 226 or depress thefoot pedal 227 a to move thesecond end 223 b of theswing arm 223 to the right, move thepiston portion 220 b to the right, and contract themaster cylinder 220. When the driver releases the hand andfoot brakes spring 228 pulls thefoot brake 227 upwardly, which pushes thesecond end 223 b of theswing arm 223 back to the left to extend themaster cylinder 220 and release the brakes. - As illustrated in FIG. 6, the longitudinal elongation of the
frame 102 enablesATV 100 components such as thepower unit 215,brake actuating system 217, batteries, etc. to be longitudinally spaced from each other to a greater extent than in conventional ATVs. In conventional ATVs, the lack of longitudinal space forces designers to stack ATV components into longitudinally cramped locations. Conversely, as is apparent in FIG. 6, the longitudinal elongation ofATV 100 allows components to be spread out over the longer length of theframe 102 of theATV 100. The longitudinal spacing makes access to individual components such as the brake actuating system 217 (see FIGS. 6 and 7) much simpler. By simply removing theremovable seat 139, which is removably connected to theATV 100 using conventional fasteners (e.g., a latch, etc.), an operator can access many of the components of theATV 100 for necessary maintenance and/or servicing. Otherwise, the space can be used for additional storage. - Each of the
rear fenders 137 includes a series ofventilation openings 230 that direct air to the air intake of thepower unit 215 and/or a radiator/fan assembly (not shown).Additional ventilation openings 235 are provided for thepower unit 215 below theforward end 140 a of themain seat portion 140 a. - As illustrated in FIGS. 1, 3A,5, and 6, the
ATV 100 includes left andright footrests 250, which includefront portions 260 for the driver sitting on themain seat portion 140 andrear portions 270 for the passenger sitting on thesecondary seat portion 145. As illustrated in FIGS. 5A-5C, the front andrear portions upper surfaces upper surfaces rear footrest portions upper surfaces - The
upper surface 270 a of therear footrest portion 270 is elevated relative to theupper surface 260 a of thefront footrest portion 260 by a vertical distance X, which preferably approximates the vertical distance H formed between theseat portions secondary seat portion 145 must bend his/her legs to a greater extent than the driver who sits on themain seat portion 140. In such an embodiment, the distance X is preferably between 1 and 10 inches, is more preferably between 3 and 8 inches, is even more preferably between 3 and 7 inches, is even more preferably between 4 and 6 inches, and is even more preferably about 5 inches. The larger distance X also advantageously accommodates a passenger who is smaller than the driver. - As best illustrated in FIGS.5A-5C, the
rear footrest portion 270 preferably comprises a plurality of sheets of material that connect together to elevate theupper surface 270 a relative to theupper surface 260 a. Theupper surface 270 a is defined by anupper sheet member 270 d of therear footrest portion 270. Thefootrest portion 270 also includes a front, generally-planar,sheet member 270 b, which extends vertically from a forward edge of theupper sheet member 270 d to an upper rear edge of thefront footrest portion 260. A side, generally-planar,sheet member 270 c extends vertically from an outer lateral edge of theupper sheet member 270 d to aside guard 300, which is described in greater detail below. Thesheet members separate members - As best illustrated in FIG. 5A, the
footrests 250 preferably extend over a full longitudinal distance F formed between the fenders/mudguards ATV 100 is significantly longer than in conventional ATVs, the distance F between thefenders footrests 250 without interfering with each other's feet. Similarly, a ratio of the wheelbase L to the length F is preferably between 1 and 2.7, is more preferably less than 2.6, is even more preferably less than 2.5, and is even more preferably about 2. - As illustrated in FIGS. 1 and 5, right and left side guards (or side bumpers or tree guards or side rails)300 preferably extend laterally outwardly from the
frame 102 and/orfootrests 250 to positions that are laterally outward from the outer lateral ends of thefootrests 250. The side guards 300 preferably extend longitudinally from a forward end of thefront footrest portion 260 to a rearward end of therearward footrest portion 270. At least a portion of the side guards 300 also preferably extends laterally outwardly beyond therear fenders 137. As best illustrated in FIGS. 5B and 5C, a middle portion of eachside guard 300 angles laterally outwardly and upwardly as it progresses rearwardly. The illustratedside guards 300 provide support for thefootrests 250. Accordingly, the upward angle of the middle portion of the side guards 300 preferably creates at least a portion of the gap X between the front andrear portions footrests 250. However, the side guards 300 andfootrests 250 may alternatively be completely distinct. - Each of the illustrated
side guards 300 preferably comprises strong, metallic, unitary, tubular members. The unitary member may be a composite of integrally connection sections. The integral connection between sections of eachside guard 300 may be formed by welding, gluing, or using any other comparable permanent attachment mechanism. Alternatively, the unitary member may result from integral formation, such as would be the case if each side guard comprised a single, elongated, tubular member. - Each of the illustrated
side guards 300 are designed to withstand an impact with a tree or other stationary object during operation of theATV 100. If the driver steers theATV 100 too close to a stationary object, the side guards 300 will contact the object and deflect theATV 100 away from the object to prevent the object from squeezing laterally against and/or breaking fragile components of either the ATV 100 (e.g., thefenders rear rack 130, or the grab handles 340) or, more importantly, the riders' arms and legs. - An
open space 330 is provided in front of themain portion 140 of theseat 139. Theopen space 330 is provided to facilitate entry and exit from theATV 100, as described in commonly assigned U.S. application Ser. No. 09/057,652, filed on Apr. 9, 1998, which is incorporated herein by reference in its entirety. Alternatively, theopen space 330 could be provided just behind themain seat portion 140 and just in front of thesecondary seat portion 145. Of course, an open space could be provided in front of themain portion 140 and in front of thesecondary portion 145, to facilitate ingress/agress of both the driver and passenger. Alternatively, theopen space 330 could be omitted entirely without deviating from the scope of the present invention. - As illustrated in FIGS.1-3B, 3D, and 4A-4C, right and left grab handles 340 are provided on the right and left lateral sides of the
secondary seat portion 145 to help the passenger sitting on thesecondary seat portion 145 stabilize himself/herself during operation of theATV 100. As best illustrated in FIGS. 3A and 4B, the grab handles 340 preferably do not extend laterally outwardly beyond the side guards 300 or theside members 130 b of therear rack 130. The illustrated grab handles 340 attach to and are supported by therear rack 130, but may alternatively attach to any other suitable portion of the ATV 100 (e.g., directly to the frame, etc.). The grab handles 340 extend forwardly from a forward portion of therear rack 130. In the illustrated embodiment, the grab handles 340 are clamped to therear rack 130 withbolts 342 but may alternatively be attached to therear rack 130 using a variety of other attachment techniques (e.g., integral formation with the rear rack, glue, direct bolts, welds, etc.). As illustrated in FIGS. 1 and 4A, the grab handles 340 are positioned at roughly the same longitudinal position as the secondary supportingrange 145 b of thesecondary seat portion 145 to provide the passenger with easy access to the grab handles 340. Further, the grab handles 340 are preferably conveniently disposed at about the same height as the secondary supportingrange 145 b. Accordingly, while the grab handles 340 are high enough that the passenger can easily reach them while seated on thesecondary seat portion 145, the grab handles 340 are low enough that they do not significantly interfere, if at all, with the lateral movement of the passenger's legs or with the passenger's ability to mount and dismount theATV 100. Consequently, if theATV 100 happens to roll over, the grab handles 340 will not trap the passenger on theATV 100. Furthermore, the combination of physical freedom and support that the grab handles 340 provide the passenger help to enable the passenger to comfortably and actively position himself/herself while riding theATV 100. - As best illustrated in FIGS. 4B and 4C, the
grab handle 340 preferably includes a ring-shapedportion 340 a that provides a variety of gripping portions that the passenger can easily, firmly grip with his/her hands. Thegrab handle 340 may also include agripping knob 340 b disposed within the opening inside the ring-shapedportion 340 a. The passenger may grab onto thegripping knob 340 b or the ring-shapedportion 340 a to help stabilize and actively position himself/herself on theATV 100 while riding. If the passenger uses thegripping knob 340 b instead of the ring-shapedportion 340 a of thegrab handle 340, the ring-shapedportion 340 a may function as a hand guard to prevent the passenger's hands from hitting objects such as branches that theATV 100 brushes by during operation. While the illustratedgrab handle 340 includes a ring-shapedportion 340 a and agripping knob 340 b, a variety of alternatively shaped grab handles may also be used without deviating from the scope of the present invention. - The ring-shaped
portion 340 a of thegrab handle 340 is preferably flexible enough that it can deform when a passenger dismounts thesecondary seat portion 145 and yet rigid enough that the ring-shapedportion 340 a can provide sufficient support for the passenger. The grab handles 340 preferably comprise metal portions that are covered with a resilient material such as rubber or plastic. The ring-shapedportion 340 a may be blow molded and hollow so that it provides the needed flexibility and strength. The ring-shapedportion 340 a preferably comprises a resilient material such as rubber or plastic. The resilient material preferably provides a more comfortable grip for the passenger than a hardened, purely metal, grab handle. - The grab handles340 may be heated to provide the passenger with added comfort during cold weather use. Electric heating elements (not shown) may be mounted to or in the grab handles 340 and operatively connected to the ATV's electrical system so as to provide the desired electric heating.
- While the illustrated grab handles340 extend generally horizontally (i.e., their horizontal component is substantially greater than their vertical component) on the
ATV 100, the grab handles 340 could alternatively extend upwardly on either side of the secondary seat portion 245. The location and orientation of such grab handles may be similar to the grab handles described in commonly assigned U.S. Provisional Application Serial No. 60/354,968, titled “QUICK RELEASE PASSENGER SEAT WITH FLEXIBLE GRAB HANDLE,” filed on Feb. 11, 2002, which is incorporated herein by reference in its entirety. Such grab handles may still be mounted to therear rack 130 or to the top of therear fenders 137. - FIG. 10 illustrates alternative grab handles344 that may replace the grab handles 340. The grab handles 344 each comprise generally U-shaped,
tubular members 346. The ends of theU-shaped members 346 extend rearwardly and attach to the front end of therear rack 130 via bolts, welds, etc. Thetubular members 346 may comprise metal tubes. The forward portion of theU-shaped members 346 are preferably covered with a non-slip coating such as aresilient rubber cover 348 that enables the passenger to comfortably and securely grip the grab handles 344. - A
gear shift 350 is provided on the left hand of the steering column of thehandlebars 134. Thegear shift 350 is movable between various positions, including a park position (P), neutral (N), drive (H, L) and reverse (R). - As illustrated in FIG. 15, the two-
person ATV 100 may be modified to accommodate three or even more riders on anATV 400. The two-person ATV 100 may be converted into the three-person ATV 400 by adding a longitudinal extension to theATV 100 between the main andsecondary seat portions 145. Accordingly, aseat 405 of theATV 400 includes amain seat portion 410 for a driver, asecondary seat portion 420 for a first passenger, and atertiary seat portion 430 for a second passenger. For each additional rider to be added, the wheelbase L, the length F, and the length S should each be increased (e.g., by 8 to 15 inches per rider). The lateral distance between thewheels type seat 139 should include an additional passenger seat portion and thefootrests 250 should include an additional, appropriately positioned footrest portion. Thepower unit 215 would be longitudinally positioned to optimize the ATV's center of gravity based on a weighted average of the proportional occupancy time for each seat portion. - While the preferred embodiments include many features, the scope of the present invention is not limited to the combination of every one of the features. Rather, the invention may comprise any combination of one or more of these features (e.g., elongated wheelbase, improved ATV center of gravity, centrally located brake actuating system, passenger seat, passenger seat positioning, driver seat, driver seat positioning, backrest, elongated and/or stepped footrests, side grab handles, low passenger positioning, tapering driver and passenger seat portions, side guards, open storage space on top of the rear rack, facilitation of active positioning for the driver and/or passenger, etc.).
- While preferred embodiments have been discussed with reference to specific features therein, it is to be understood that the preferred embodiments are examples only and that other preferred embodiments would be apparent to those of ordinary skill in the art without falling outside the spirit and scope of the present invention.
Claims (14)
1. An ATV comprising:
a frame;
only four wheels suspended from the frame, two of which are rear wheels and two of which are front wheels, the front wheels defining a front axis and the rear wheels defining the rear axis and each of the wheels includes an ATV-type tire;
a power unit for driving at least one of the wheels disposed on the frame;
a straddle-type seat supported by the frame including a main seat portion for a driver and a secondary seat portion, rearward of the main portion, for a standard passenger; and
a steering member connected to the frame comprising a handlebar for steering at least one of the wheels,
wherein the straddle-type seat is constructed and arranged such that, in use, a center of gravity of the passenger sitting in a standard riding position on the secondary seat portion is disposed in front of the rear axis.
2. The ATV of claim 1 , wherein the distance between the front and the rear axes is between 52 and 72 inches.
3. The ATV of claim 2 , wherein the straddle-type seat is constructed and arranged such that, in use, the center of gravity is disposed in front of the rear axis by between 1 and 19 inches.
4. The ATV of claim 3 , wherein the straddle-type seat is constructed and arranged such that, in use, the center of gravity is disposed in front of the rear axis by between 4 and 19 inches.
5. The ATV of claim 4 , wherein the straddle-type seat is constructed and arranged such that, in use, the center of gravity is disposed in front of the rear axis by between 5 and 19 inches.
6. The ATV of claim 2 , wherein the straddle-type seat is constructed and arranged such that, in use, a ratio of a distance between the front axis and the center of gravity to a distance between the center of gravity and the rear axis is less than 13.
7. The ATV of claim 6 , wherein the ratio is less than 11.
8. The ATV of claim 7 , wherein the ratio is less than 9.
9. The ATV of claim 6 , wherein the ration is between 2 and 13.
10. An ATV comprising:
a frame;
only four wheels suspended from the frame, two of which are rear wheels and two of which are front wheels, the front and rear wheels having front and rear axes and each of the wheels includes an ATV-type tire;
a power unit for driving at least one of the wheels disposed on the frame;
a straddle-type seat including a main seat portion for a driver and a secondary seat portion, rearward of the main portion, for a passenger; and
a steering member connected to the frame comprising a handlebar for steering at least one of the wheels, wherein the straddle-type seat is constructed and arranged such that, in use, a center of gravity of the driver sitting in a standard riding position on the main seat portion is disposed in front of the rear axis by at least 13 inches.
11. The ATV of claim 10 , wherein the distance between the front and the rear axes is between 52 and 72 inches.
12. The ATV of claim 11 , wherein the straddle-type seat is constructed and arranged such that, in use, the center of gravity is disposed in front of the rear axis by at least 15 inches.
13. The ATV of claim 12 , wherein the straddle-type seat is constructed and arranged such that, in use, the center of gravity is disposed in front of the rear axis by at least 19 inches.
14. The ATV of claim 13 , wherein the straddle-type seat is constructed and arranged such that, in use, the center of gravity is disposed in front of the rear axis by between 21 and 30 inches.
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US10/647,779 US20040112658A1 (en) | 2000-09-13 | 2003-08-26 | All terrain vehicle with passenger seating configuration |
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US39311402P | 2002-07-03 | 2002-07-03 | |
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US10/292,813 US6968917B2 (en) | 2000-09-13 | 2002-11-13 | ATV with improved driver positioning and/or multi passenger capacity |
US47551103P | 2003-06-04 | 2003-06-04 | |
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US10/647,786 Abandoned US20040134707A1 (en) | 2000-09-13 | 2003-08-26 | All terrain vehicle with specific wheel base |
US10/647,785 Abandoned US20040108158A1 (en) | 2000-09-13 | 2003-08-26 | All terrain vehicle with rear rack |
US10/647,788 Abandoned US20040108159A1 (en) | 2000-09-13 | 2003-08-26 | All terrain vehicle with driver and passenger seating configuration |
US10/647,780 Expired - Fee Related US7121371B2 (en) | 2000-09-13 | 2003-08-26 | All terrain vehicle with a seat backrest |
US10/647,779 Abandoned US20040112658A1 (en) | 2000-09-13 | 2003-08-26 | All terrain vehicle with passenger seating configuration |
US10/647,781 Abandoned US20040113389A1 (en) | 2000-09-13 | 2003-08-26 | All terrain vehicle with passenger seating configuration |
US10/647,782 Abandoned US20040135342A1 (en) | 2000-09-13 | 2003-08-26 | All terrain vehicle with driver and passenger seating |
US11/181,751 Abandoned US20050247506A1 (en) | 2000-09-13 | 2005-07-15 | All-terrain vehicle with driver and passenger seating |
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US10/647,785 Abandoned US20040108158A1 (en) | 2000-09-13 | 2003-08-26 | All terrain vehicle with rear rack |
US10/647,788 Abandoned US20040108159A1 (en) | 2000-09-13 | 2003-08-26 | All terrain vehicle with driver and passenger seating configuration |
US10/647,780 Expired - Fee Related US7121371B2 (en) | 2000-09-13 | 2003-08-26 | All terrain vehicle with a seat backrest |
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US10/647,782 Abandoned US20040135342A1 (en) | 2000-09-13 | 2003-08-26 | All terrain vehicle with driver and passenger seating |
US11/181,751 Abandoned US20050247506A1 (en) | 2000-09-13 | 2005-07-15 | All-terrain vehicle with driver and passenger seating |
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Cited By (1)
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7404568B1 (en) | 2004-03-08 | 2008-07-29 | Bombardier Recreational Products Inc. | Flip-down footrests for an all-terrain vehicle |
US7543836B2 (en) | 2004-03-08 | 2009-06-09 | Bombardier Recreational Products Inc. | Flip-down footrest for an all-terrain vehicle |
Also Published As
Publication number | Publication date |
---|---|
US20030102694A1 (en) | 2003-06-05 |
US20040135342A1 (en) | 2004-07-15 |
US7121371B2 (en) | 2006-10-17 |
US20040134707A1 (en) | 2004-07-15 |
US20050247506A1 (en) | 2005-11-10 |
US6968917B2 (en) | 2005-11-29 |
US20040113389A1 (en) | 2004-06-17 |
US20040108159A1 (en) | 2004-06-10 |
US20040129484A1 (en) | 2004-07-08 |
US20040108158A1 (en) | 2004-06-10 |
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Owner name: BOMBARDIER RECREATIONAL PRODUCTS INC., CANADA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BOMBARDIER INC.;REEL/FRAME:014296/0079 Effective date: 20031218 |
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