CA1317166C - Boat propulsion device - Google Patents
Boat propulsion deviceInfo
- Publication number
- CA1317166C CA1317166C CA000567973A CA567973A CA1317166C CA 1317166 C CA1317166 C CA 1317166C CA 000567973 A CA000567973 A CA 000567973A CA 567973 A CA567973 A CA 567973A CA 1317166 C CA1317166 C CA 1317166C
- Authority
- CA
- Canada
- Prior art keywords
- drive
- assembly
- boat
- steering
- drive shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
- B63H2005/1254—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis
- B63H2005/1256—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis with mechanical power transmission to propellers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Arrangement Of Transmissions (AREA)
- Steering Controls (AREA)
Abstract
BOAT PROPULSION DEVICE
ABSTRACT
A propulsion advice for a boat that mounts through a hole in a bottom surface of the boat, The engine is positioned inside the boat and the propeller drive is positioned under a bottom surface of the boat. The propulsion device includes a mounting assembly, a steering assembly rotatably connecting the drive to the mounting assembly for steering the propeller drive under the boat, a trimming assembly swingingly connecting the drive to the steering assembly for trimming/tilting of the propeller drive under the boat at any steered position, and a drive shaft means providing a drive connection between the engine and the propeller drive at any steered and trimmed position,
ABSTRACT
A propulsion advice for a boat that mounts through a hole in a bottom surface of the boat, The engine is positioned inside the boat and the propeller drive is positioned under a bottom surface of the boat. The propulsion device includes a mounting assembly, a steering assembly rotatably connecting the drive to the mounting assembly for steering the propeller drive under the boat, a trimming assembly swingingly connecting the drive to the steering assembly for trimming/tilting of the propeller drive under the boat at any steered position, and a drive shaft means providing a drive connection between the engine and the propeller drive at any steered and trimmed position,
Description
- t317166 1~,.2 S P E C I F I C ~ ~ 3 O N
~OQ~ PROPULSION DEVICE
~OQ~ PROPULSION DEVICE
2~C~GROUND OF T~E INVENT3ON
The field of the present invention i5 a ~Dat Dropulsion device and more particularly concerns the mounting, steering and trimming~tilting of a boat propulsion device having an engine insirJe a boat and attaching through a bottom surface of the boat to a drive under the coat wr-ich s~jnos under the boat for steering and trimming/tilting.
Prior boat propulsion devices which prDvide steerinq and trimming of a drive include the stern drive and the outboard. The stern drive has an engine inside the boat and a drive at the rear of the boat. The outboard is an unit assembly of engine and drive mounted outside the boat Other prior propulsion devices that have an engine inside the boat and a drive under the boat do not provide the drive with steering and trimming. In U.S. Patent, 2,20q,302 issued to L.J. Johnson et al steering of a drive and tilting of ~ drive described. In U.S. Patents 2,~7~,33~ ancl 3,1~4 "22 issued to L.J. Fageol steering and trimming of ~he entire boat propulsion device as an unit is described.
The stern drive anrJ outboard are satisfactory propulsion devices, but they are large, complex and costly. The other prior drives described above are not particularly desirable since they do not provide an arrangement which provides steering and trimming eguivalent to the stern drive.
SUMMARY OF THE INVENTION
The invention pertains to a propulsion device for a boat having a bottom surface comprising an engine for positioning inside the boat; a propeller drive for positioning under the bottom surface of the boat; and a mounting assembly for mounting within the bottom surface of the boat between the engine and the drive.
In one aspect, a steering assembly rotatably connects the drive to the mounting assembly, the steering assembly having a tubular portion extending upwardly through the mounting assembly and -the steering assembly rotating within the mounting assembly about a generally vertical axis. A trimlling system connects the drive to the steering assembly for providing a limited range of horizontal swinging movement therefrom; and a drive shaft means drivably couples the drive to the engine.
In another aspect the invention provides a steering assembly having a trimming assembly moun-ted thereto, the steering assembly connecting the drive to rotate on a generally vertical axis within the mounting assembly for generally vertical rotation for steering, the trimming assembly providiny for generally horizon-tal rotation for trimming. The steering and trimming assembly includes a drive shaft passageway means providing a sealed enclosure within the steering and trim~ing assembly during the trimming; and a drive shaft means drivably couples the engine with the drive through the drive shaf-t passageway means.
The invention also comprehends a propulsion device for a boat comprising an engine for positioning inside -the boat, the engine positioned with the crankshaft vertical and output end of the crankshaft down, and a propeller drive for positioning under a bottom surface of the boat. A mounting assembly is between the engine and the drive, the mounting assembly including an engine mounting portion for mounting the engine. A steering assembly connects the drive to the mounting assembly, the steering assembly constructed to rotate about a generally vertical axis with the mounting assembly, and the steering assembly including a steering member having a steering arm fixed thereto. A drive shaft means drivably couples the engine with -the drive, the drive shaft means including an upper drive shaft drivably connecting through the mounting assembly coaxial with the generally ver-tical axis.
Still further the invention provides a propulsion device for a boat c~mprising an engine for positioning inside the boat; a propeller drive for positioning under a bottom surface of the boat; a mounting assembly constructed to be mounted at a generally horizontal surface of the boat between the engine and the drive, and a steering and trimming assembly. The steering assembly rotatably connects the drive to the mounting assembly, the steering assembly having a depending first trunnion. The trimming assembly connects the drive to the steering assembly and has an upwardly ex-tending second trunnion, the first trunnion engaging with the second trunnion at a co~mon horizontal pivot means for providing swinging upward movement of the drive. The steering and trim~ing assembly have a drive shaft enclosure therein, and there is a drive shaft means including an upper drive shaft, a lower drive shaft with a universal joint connecting the upper and lower drive shafts, the upper and lower drive shafts and the universal joint positioned within the drive shaft enclosure.
More particularly, in the presen-t invention the mounting arrangement of a boat propulsion device supports a drive under and extending to the rear of the boat to provide an advantageous drive connection vertically through the boat hull. This arrangement achieves an improved orientation of the engine spaced relatively close to the boat transom and results in a more efficient use of the interior of the boat. In fact, the vertical placement of the engine significantly enhances the arrangement of interior seating at the stern of the boat.
2a-~, ~; s''' - 1 3 1 7 1 6~
Included with the drive positioning under the boat is a steering assembly which accomplishes the steering of the drive on the axis of the vertical engine thereby eliminating the difficulty associated with different axes. Also employed with the drive steering is a trimming assembly which achieves drive trim and tilt under the boat withou-t the necessity of lifting an entire outboard or the equally massive stern drive. The trim is accomplished with a horizontal pivot across which a trim adjusting system changes the trim and tilt angle. The drive transmission with ultimate design simplicity passes through the horizontal pivo-t with a flexible coupling resulting in a drive transmission configuration not realized with the conventional drives. The drive transmission flexible coupling also is conveniently enclosed and supported by drive shaft bearings.
The device of the present invention provides other advantages in the boat mounting, steering and trim/tilt mechanism which interfaces with the engine and the drive in ~ 2b-t317t66 ~Y~/2 a manner which simplifies installation and maintenance. ~he mountlng rotatably on bearings supports the arive and connects the steering arm inside the boat with easy accessibility for operation from the boat steering sy5tem seals the mounting hole and maintains rigid alignment of the engine to the drive thereby avoiding separate mechanisms compensating for bending of the hull.
8RIEF DESCRIPTlDN OF THE DR~WIN5S
Fjgure la is a general side elevatiDn view of the 0 boat propul~ion device of the invention.
Figure Ib i5 a general end elevation view of the boat propulsion device and boat of Figure la.
Figure Ic is a general bottom elevation view of a ooat propulsion device and boat of Figure la.
Figure 2 is a front elevation view of the boat propulsion device of the invention.
Figure 3 is a right side elevation view of the DOat propulsion device of Figure 2.
Flgure 4 is a back elevation view of the boat 20 prDpulsion device of the invention; shown wlth Figure 2.
Figure 5 is a cros5-5eCtion view of the boat propulsion device as shown in Figure 3.
Figure b is a cross-section view of the boat propulsion dævice as shDwn in Figure 2.
Figure 7 is a fragmentary bottom elevation view similar to Figure Ic showing the steering range o~ the boat propulsion device.
Figure 2 is a fragmentary side elevation view similar to Figure la showing the trimitilt range of the boat propulsion device.
1 3 1 7 1 6 6 ; ~b/2 DETQILED DES~RIPTION OF ~lE _ FERRED EM~OD~ENT
L-drive A boat propulsion device or L-Drive ~0 15 shown mounted on a water craft or boat 11 in Figures I through ~.
The boat propulsion device 10 includes an engine 12, a mounting assembly 13 and a propeller drive 14.
The engine 12 may be of either a 2 or 4 cycle internal combustion type. In the preferred embodiment an eighty five horsepower engine as used on the US Marine Force outboard is used. For increased horsepower, the one hundred twenty five horsepower engine as used on the US ~arine Force outboard may be used. The engine 12 is prevented from movement oy attachment to the mounting assembly 13~ ln the preferred embodiment She engine 12 is attached with the encJine on a vertical axis and connected for power transmission as will be described.
The mounting assembly 13 as shown in Figures 2 through 5 includes an engine mounting pDrtion IS for attachment Df the engine 12 to the mounting assembly 13, a boat mounting portion 16 for attachment of the mounting assembly to the boat 11, and a drive mounting`portion 17 for attachment of the drive 14 to the mounting assembly 13.
The engine mounting portion 16 as shDwn in Figures 3 and S is a spaced set of four engine pads or mounts l9 which extend or project downward from the engine adapter plate ~8. The adapter plate 18includes a mounting bolt pattern ~not shown) which matches the attachment bolt pattern (not shown) on the engine 12 to align the engine crankshaft.
The drive 14 as shown in Figure 2 through 5 includes a steering assembly 20, a trimming assembly 21 with a trim adjusting system 22, a propeller drive lDwer unit 23, a lower unit adapter 24, and a drive shaft means 25. The drive 14 1 ~1 7 1 66 ~ /2 rotates from si~e-to-sl~e about a vertical axis 2~ or S-S in t~e mounting assembly 13 to steer and pivots up-and-down about a hori~ontal axis ~7 or T-T to trim/tilt.
The boat mounting portion 1~ includes a central member 22, a boat connecting member or mrunting flange 29, and a resilient member 30 between the central member 28 and the mounting flange 2~. The central member 28 has a lower portion 31 forming a lower clamping surface 32 and an upper portion 33 forming an upper clamping surface 34. The mounting 0 flange 29 has an inner retaining surface 35 and an outer mounting flange surface 3~. The resilient member 30 is positioned clamped between the lower clamping surface 3Z, the upper clamping surface 34 and the inner retaining 5urface 35.
The resilient member 30 generally supports the L-Drive 10 and provides a limited amount of vibration isolation. The flanoe surface 36 attaches to the boat 11. The drive mounting por'ion 17 i5 the steering member 37 which is rotatably supported in spaced bearings 38 in the central member 28 shown in Figures 5 and ~.
The steering assembly 20 includes a steering member 37 and a steering arm 40 for rotating the steering member 37 to steer the boat 11. The steering member 37 as shown in Figures 3 and 5 is formed with an upper generally tubular portion or hr,llow spindle 42 which extends up through the mounting assembly 13 to a position above the mounting assembly 13 and within the engine mounting portion 15. The steering member 37 rotates on the axis S-S.
The steering arm 40 is attached to the top of the hollow spindle 42 o~ the steering member 37 with a key or spline (not shown~ so that they rotate as one unit. The steering arm 40 extends out generally horizontal from the hollow spindle 42 within the engine mounting portion 15 between two of the engine mounts 13 as shown in Figure 2. The two engine mounts 13 are ~ 31 7 1 66 l~b/2 positioned spaced to provi~e rotational steering ranae for the steering arm 40 and the height of the engine mounts 18 also provioes height clearance for the steering arm 40~ The steer~no arm 40 is connected with a boat steering system which rotates the steering member 37 to steer the drive 14.
The steering assembly 20 also Includes a lower depending portion, yoke or downward trunnion 48 which provides the hori20ntal trimming pivot 44 for the trimming assembly 21.
The trimming assembly 21 includes an upward trunnion 43 on the lower unit adapter 24 which pivotally mounts the adapter 24 to the downward trunnion 45 on the steering member 37 at trimming pivot 44. The overlapping or enoaging sides of the trunnions 43 and 45 each contains a pivot pin 4~ at trunnion pivot 44. The trimming assembly 21 also utilizes a trim adjusting system 22 which includes a hydraulic trim cylinder 47 on each side of the drive 14 connected between a cylinder upper pivot 48 on the steering member 37 and a cylinder lower pivot 4 on the lower unit 23. Operation of the hydraulic trim cylinder 47 pivots the drive 14 up-and-down about aligned pivot pins 4 for trim/tilt. ~Ithough two trim cylinders 47 are shown, one cylinder 47 may be used.
The lower unit 23 as shown in Figure 2 through 4 includes the propeller 50, a propeller shaft including reversing clutch and gearing (not shown), an anticavitation plate 51 and a trim fin 52 under the anticavitation plate 51. The lower unit 23 is of known construction used in an outboard. The preferred lower unit 23 is an eighty-five horsepower lower unit used in the Force ~utboard.
The lower unit adapter 24 as shown in Figure S
mounts to the top of the lower unit 23 to detachably interface or adapt from the lower unit 23 to the trimming assembly 21 at the trimming pivot 44.
19~3~/2 The drive shaft means 25 as shown in Figures ' an~
includes a first nr upper vertical drive shaft 53, a second or lower ~rive shaft 54, and a flexible coupling or universal Joint 55 connecting adjacent ends of the ~rive shafts 53 and 54. ~he upper drive shaft 53 is between the engine crankshaft 5~ and the trimming pivot 44 and the lower drive shaft 54 is between the trimming pivot 44 and the lower unit 23 attaching to the lo~er unit gearing ~not shown) as is known. The upper drive shaft 53 incluoes an external spline 57 which slidably engages the o internal spline 58 in the engine crankshaft 56. The lower drlve shaft 54 is generally vertical when the propeller shaft is horizontal. The upper drive shaft 53 is positioned on the vertical axis 5-5. The lower driveshaft 54 angles down from the upper drive shaft 53 at the universal joint 55 during trim/tilt. The upper and lower drive shafts 53 and 54 are coplanar with a plane that is perpendicular to the axis T-T
of the trimming pivot 44.
A drive shaft upper bearing support 59 is also provided as a depending portion of the engine mounting portion 15. The upper bearing support 59 is formed as a hollow member extending downward from the adapter plate 19 into the space between the hollow spindle 42 and the upper drive shaft S3. The lower end of the upper support 5q contains an upper shaft bearing 60 positioned adjacent the unusuas joint 55 for support of the upper drive shaft 53. The upper shaft bearing 60 aligns the upper drive shaft 53 with the engine crankshaft 56.
A lower driveshaft bearing support 61 is also provided as a hollow member extending upward from the lower unit adapter 24 into the space between the upward trunnion 45 and the lower drive shaft 54. The upper end of the upper bearing support 59 contains a lower drive shaft bearing ~Z positioned adjacent the universal joint 55 for support of the lower drive shaft 54.
The steering assembly and trimming assembly - 1317166 1~7~/2 generally include ~ central passdgeway t~rein forming a clc,sed compartment or enclosure ~3 around the drive shaft means 25 and particularly the universal ioint 55 as shown in Figure 5. The enclosure b3 extends from within the steering member 37 do~n to within the lower unit adapter 24. A tubular upper end portion ~4 within the steering member 37 forms the upper portion of the enclosures 63 and a tubular lower end portion 65 between the upward trunnion 45 forms a lower end of the enclosure b3.
flexible cover or universal jo}nt bellows b6 extends between the upper end portion b4 and the lower end portion bS to cover the universal joint 55. The bellows 66 is a resilient tubular connector which is slipped over the end portions 64 and 65 and fastened therewith by a hose clamp 67. The enclosure protects the universal joint 55 from water.
The L-Drive 10 also includes a shift assembly ~not shown) for operating the clutch ~not shown) in the lower unit Z3, an enoine water cooling system including a drive shaft driven pump ~not shown) and an engine exhaust system ~8.
The ~oat The boat 11 as shown in Figures la, lb, and lc includes a planing hull 70 and a generally vertical upri~ht transom 71. The hu1170 includes a bottom planing surface 72 and cavity 73 adjacent the transom 71. The cavity 71 extends upwardly into the hull 70 and has an open end extending through a notch 74 in the transom 71.
The cavity 73 includes a first portside wall 75, a second starboard side wall 7b and a third forward wall 77.
The forward wall 77 is preferably vertically upright similar to the transom 71. The forward wall 77 is positioned as far rearward as possible against the drive 14 to provide maximum bottom planing surface 72 forward of the drive 14. A hole 73 as shown in Figure 4 is formed in the top 77 of the cavity 73 to _~_ t317166 ~ ~a~/~
attac~ the mounting assembly 13.
ODeratior. of the Steering and ~rimming Svstem Steering and trimming of the L-Drive 10 is easily accomplished. To steer the boat 11, the driver turns the boat steering wheel which operates the boat steering system to turn the drive 14. To trim the boat 11, the operator operates the boat hydraulic system to power the hydraulic trim cylin~er 47 to lift or lower the drive 14. The steering of the drive 14 is about the horizontal axis T-~.
The steering i5 totally independent from the trimming or tilting. In other words, the operator can steer at any trim position and the operator can trim at any steered position.
The steering of the drive 14 is further described with respect to Figure 3 and 5. When the steering arm 40 is moved by the steering system of the boat 11, it rotates the steering member 37 to steer the drive 14. Steering the drive 14 redirects the propeller thrust. The redirected propeller thrust changes the direction of the boat 11 thereby directing or steering the boat in the oesired path.
In Figure 7 ~a bottom elevation view)~ the drive 14a ~shown in phantom lines) illustrates steering trJ starboard and the drive 14b ~shown in phantom lines) illustrates steering to port.
The trimming of the drive is further described with respect to Figures ~. When the drive 14 is being trimmed it swings up-and down about the hori20ntal pivot axis 27 or T-T. Swinging of the drive 14 changes the angle of the propeller thrust direction to lift or lower the bow of the boat. The range of angular direction of the propeller thrust from a boat stopped condition to an on plane condition generally defines the range of trim. The range of tilt is upwardly from the maximum up r,r out trim position to the highest position available. The tilt range `` 1317166 1~3~/2 is used to change the propeller and to lift the drive 14 when removing the ~oat 11 from the water on a trailer of for transporting storage. The propeller thrust is generally not used or available i the tilt-range therefore steering does not occur. In Figure a, the drive 14a (shown in phantom) shows a generally operating trim position and the drive 14b ~shown in phantom) shows a generally up-tilt position.
While an embodiment and application of the invention has been shown and describèd, it would be apparent 0 to those skilled in the art that modifications are possible without departing from the invention concepts herein.
Therefore, the invention is not to be restricted other than by the scope and equivalency of the following claims.
The field of the present invention i5 a ~Dat Dropulsion device and more particularly concerns the mounting, steering and trimming~tilting of a boat propulsion device having an engine insirJe a boat and attaching through a bottom surface of the boat to a drive under the coat wr-ich s~jnos under the boat for steering and trimming/tilting.
Prior boat propulsion devices which prDvide steerinq and trimming of a drive include the stern drive and the outboard. The stern drive has an engine inside the boat and a drive at the rear of the boat. The outboard is an unit assembly of engine and drive mounted outside the boat Other prior propulsion devices that have an engine inside the boat and a drive under the boat do not provide the drive with steering and trimming. In U.S. Patent, 2,20q,302 issued to L.J. Johnson et al steering of a drive and tilting of ~ drive described. In U.S. Patents 2,~7~,33~ ancl 3,1~4 "22 issued to L.J. Fageol steering and trimming of ~he entire boat propulsion device as an unit is described.
The stern drive anrJ outboard are satisfactory propulsion devices, but they are large, complex and costly. The other prior drives described above are not particularly desirable since they do not provide an arrangement which provides steering and trimming eguivalent to the stern drive.
SUMMARY OF THE INVENTION
The invention pertains to a propulsion device for a boat having a bottom surface comprising an engine for positioning inside the boat; a propeller drive for positioning under the bottom surface of the boat; and a mounting assembly for mounting within the bottom surface of the boat between the engine and the drive.
In one aspect, a steering assembly rotatably connects the drive to the mounting assembly, the steering assembly having a tubular portion extending upwardly through the mounting assembly and -the steering assembly rotating within the mounting assembly about a generally vertical axis. A trimlling system connects the drive to the steering assembly for providing a limited range of horizontal swinging movement therefrom; and a drive shaft means drivably couples the drive to the engine.
In another aspect the invention provides a steering assembly having a trimming assembly moun-ted thereto, the steering assembly connecting the drive to rotate on a generally vertical axis within the mounting assembly for generally vertical rotation for steering, the trimming assembly providiny for generally horizon-tal rotation for trimming. The steering and trimming assembly includes a drive shaft passageway means providing a sealed enclosure within the steering and trim~ing assembly during the trimming; and a drive shaft means drivably couples the engine with the drive through the drive shaf-t passageway means.
The invention also comprehends a propulsion device for a boat comprising an engine for positioning inside -the boat, the engine positioned with the crankshaft vertical and output end of the crankshaft down, and a propeller drive for positioning under a bottom surface of the boat. A mounting assembly is between the engine and the drive, the mounting assembly including an engine mounting portion for mounting the engine. A steering assembly connects the drive to the mounting assembly, the steering assembly constructed to rotate about a generally vertical axis with the mounting assembly, and the steering assembly including a steering member having a steering arm fixed thereto. A drive shaft means drivably couples the engine with -the drive, the drive shaft means including an upper drive shaft drivably connecting through the mounting assembly coaxial with the generally ver-tical axis.
Still further the invention provides a propulsion device for a boat c~mprising an engine for positioning inside the boat; a propeller drive for positioning under a bottom surface of the boat; a mounting assembly constructed to be mounted at a generally horizontal surface of the boat between the engine and the drive, and a steering and trimming assembly. The steering assembly rotatably connects the drive to the mounting assembly, the steering assembly having a depending first trunnion. The trimming assembly connects the drive to the steering assembly and has an upwardly ex-tending second trunnion, the first trunnion engaging with the second trunnion at a co~mon horizontal pivot means for providing swinging upward movement of the drive. The steering and trim~ing assembly have a drive shaft enclosure therein, and there is a drive shaft means including an upper drive shaft, a lower drive shaft with a universal joint connecting the upper and lower drive shafts, the upper and lower drive shafts and the universal joint positioned within the drive shaft enclosure.
More particularly, in the presen-t invention the mounting arrangement of a boat propulsion device supports a drive under and extending to the rear of the boat to provide an advantageous drive connection vertically through the boat hull. This arrangement achieves an improved orientation of the engine spaced relatively close to the boat transom and results in a more efficient use of the interior of the boat. In fact, the vertical placement of the engine significantly enhances the arrangement of interior seating at the stern of the boat.
2a-~, ~; s''' - 1 3 1 7 1 6~
Included with the drive positioning under the boat is a steering assembly which accomplishes the steering of the drive on the axis of the vertical engine thereby eliminating the difficulty associated with different axes. Also employed with the drive steering is a trimming assembly which achieves drive trim and tilt under the boat withou-t the necessity of lifting an entire outboard or the equally massive stern drive. The trim is accomplished with a horizontal pivot across which a trim adjusting system changes the trim and tilt angle. The drive transmission with ultimate design simplicity passes through the horizontal pivo-t with a flexible coupling resulting in a drive transmission configuration not realized with the conventional drives. The drive transmission flexible coupling also is conveniently enclosed and supported by drive shaft bearings.
The device of the present invention provides other advantages in the boat mounting, steering and trim/tilt mechanism which interfaces with the engine and the drive in ~ 2b-t317t66 ~Y~/2 a manner which simplifies installation and maintenance. ~he mountlng rotatably on bearings supports the arive and connects the steering arm inside the boat with easy accessibility for operation from the boat steering sy5tem seals the mounting hole and maintains rigid alignment of the engine to the drive thereby avoiding separate mechanisms compensating for bending of the hull.
8RIEF DESCRIPTlDN OF THE DR~WIN5S
Fjgure la is a general side elevatiDn view of the 0 boat propul~ion device of the invention.
Figure Ib i5 a general end elevation view of the boat propulsion device and boat of Figure la.
Figure Ic is a general bottom elevation view of a ooat propulsion device and boat of Figure la.
Figure 2 is a front elevation view of the boat propulsion device of the invention.
Figure 3 is a right side elevation view of the DOat propulsion device of Figure 2.
Flgure 4 is a back elevation view of the boat 20 prDpulsion device of the invention; shown wlth Figure 2.
Figure 5 is a cros5-5eCtion view of the boat propulsion device as shown in Figure 3.
Figure b is a cross-section view of the boat propulsion dævice as shDwn in Figure 2.
Figure 7 is a fragmentary bottom elevation view similar to Figure Ic showing the steering range o~ the boat propulsion device.
Figure 2 is a fragmentary side elevation view similar to Figure la showing the trimitilt range of the boat propulsion device.
1 3 1 7 1 6 6 ; ~b/2 DETQILED DES~RIPTION OF ~lE _ FERRED EM~OD~ENT
L-drive A boat propulsion device or L-Drive ~0 15 shown mounted on a water craft or boat 11 in Figures I through ~.
The boat propulsion device 10 includes an engine 12, a mounting assembly 13 and a propeller drive 14.
The engine 12 may be of either a 2 or 4 cycle internal combustion type. In the preferred embodiment an eighty five horsepower engine as used on the US Marine Force outboard is used. For increased horsepower, the one hundred twenty five horsepower engine as used on the US ~arine Force outboard may be used. The engine 12 is prevented from movement oy attachment to the mounting assembly 13~ ln the preferred embodiment She engine 12 is attached with the encJine on a vertical axis and connected for power transmission as will be described.
The mounting assembly 13 as shown in Figures 2 through 5 includes an engine mounting pDrtion IS for attachment Df the engine 12 to the mounting assembly 13, a boat mounting portion 16 for attachment of the mounting assembly to the boat 11, and a drive mounting`portion 17 for attachment of the drive 14 to the mounting assembly 13.
The engine mounting portion 16 as shDwn in Figures 3 and S is a spaced set of four engine pads or mounts l9 which extend or project downward from the engine adapter plate ~8. The adapter plate 18includes a mounting bolt pattern ~not shown) which matches the attachment bolt pattern (not shown) on the engine 12 to align the engine crankshaft.
The drive 14 as shown in Figure 2 through 5 includes a steering assembly 20, a trimming assembly 21 with a trim adjusting system 22, a propeller drive lDwer unit 23, a lower unit adapter 24, and a drive shaft means 25. The drive 14 1 ~1 7 1 66 ~ /2 rotates from si~e-to-sl~e about a vertical axis 2~ or S-S in t~e mounting assembly 13 to steer and pivots up-and-down about a hori~ontal axis ~7 or T-T to trim/tilt.
The boat mounting portion 1~ includes a central member 22, a boat connecting member or mrunting flange 29, and a resilient member 30 between the central member 28 and the mounting flange 2~. The central member 28 has a lower portion 31 forming a lower clamping surface 32 and an upper portion 33 forming an upper clamping surface 34. The mounting 0 flange 29 has an inner retaining surface 35 and an outer mounting flange surface 3~. The resilient member 30 is positioned clamped between the lower clamping surface 3Z, the upper clamping surface 34 and the inner retaining 5urface 35.
The resilient member 30 generally supports the L-Drive 10 and provides a limited amount of vibration isolation. The flanoe surface 36 attaches to the boat 11. The drive mounting por'ion 17 i5 the steering member 37 which is rotatably supported in spaced bearings 38 in the central member 28 shown in Figures 5 and ~.
The steering assembly 20 includes a steering member 37 and a steering arm 40 for rotating the steering member 37 to steer the boat 11. The steering member 37 as shown in Figures 3 and 5 is formed with an upper generally tubular portion or hr,llow spindle 42 which extends up through the mounting assembly 13 to a position above the mounting assembly 13 and within the engine mounting portion 15. The steering member 37 rotates on the axis S-S.
The steering arm 40 is attached to the top of the hollow spindle 42 o~ the steering member 37 with a key or spline (not shown~ so that they rotate as one unit. The steering arm 40 extends out generally horizontal from the hollow spindle 42 within the engine mounting portion 15 between two of the engine mounts 13 as shown in Figure 2. The two engine mounts 13 are ~ 31 7 1 66 l~b/2 positioned spaced to provi~e rotational steering ranae for the steering arm 40 and the height of the engine mounts 18 also provioes height clearance for the steering arm 40~ The steer~no arm 40 is connected with a boat steering system which rotates the steering member 37 to steer the drive 14.
The steering assembly 20 also Includes a lower depending portion, yoke or downward trunnion 48 which provides the hori20ntal trimming pivot 44 for the trimming assembly 21.
The trimming assembly 21 includes an upward trunnion 43 on the lower unit adapter 24 which pivotally mounts the adapter 24 to the downward trunnion 45 on the steering member 37 at trimming pivot 44. The overlapping or enoaging sides of the trunnions 43 and 45 each contains a pivot pin 4~ at trunnion pivot 44. The trimming assembly 21 also utilizes a trim adjusting system 22 which includes a hydraulic trim cylinder 47 on each side of the drive 14 connected between a cylinder upper pivot 48 on the steering member 37 and a cylinder lower pivot 4 on the lower unit 23. Operation of the hydraulic trim cylinder 47 pivots the drive 14 up-and-down about aligned pivot pins 4 for trim/tilt. ~Ithough two trim cylinders 47 are shown, one cylinder 47 may be used.
The lower unit 23 as shown in Figure 2 through 4 includes the propeller 50, a propeller shaft including reversing clutch and gearing (not shown), an anticavitation plate 51 and a trim fin 52 under the anticavitation plate 51. The lower unit 23 is of known construction used in an outboard. The preferred lower unit 23 is an eighty-five horsepower lower unit used in the Force ~utboard.
The lower unit adapter 24 as shown in Figure S
mounts to the top of the lower unit 23 to detachably interface or adapt from the lower unit 23 to the trimming assembly 21 at the trimming pivot 44.
19~3~/2 The drive shaft means 25 as shown in Figures ' an~
includes a first nr upper vertical drive shaft 53, a second or lower ~rive shaft 54, and a flexible coupling or universal Joint 55 connecting adjacent ends of the ~rive shafts 53 and 54. ~he upper drive shaft 53 is between the engine crankshaft 5~ and the trimming pivot 44 and the lower drive shaft 54 is between the trimming pivot 44 and the lower unit 23 attaching to the lo~er unit gearing ~not shown) as is known. The upper drive shaft 53 incluoes an external spline 57 which slidably engages the o internal spline 58 in the engine crankshaft 56. The lower drlve shaft 54 is generally vertical when the propeller shaft is horizontal. The upper drive shaft 53 is positioned on the vertical axis 5-5. The lower driveshaft 54 angles down from the upper drive shaft 53 at the universal joint 55 during trim/tilt. The upper and lower drive shafts 53 and 54 are coplanar with a plane that is perpendicular to the axis T-T
of the trimming pivot 44.
A drive shaft upper bearing support 59 is also provided as a depending portion of the engine mounting portion 15. The upper bearing support 59 is formed as a hollow member extending downward from the adapter plate 19 into the space between the hollow spindle 42 and the upper drive shaft S3. The lower end of the upper support 5q contains an upper shaft bearing 60 positioned adjacent the unusuas joint 55 for support of the upper drive shaft 53. The upper shaft bearing 60 aligns the upper drive shaft 53 with the engine crankshaft 56.
A lower driveshaft bearing support 61 is also provided as a hollow member extending upward from the lower unit adapter 24 into the space between the upward trunnion 45 and the lower drive shaft 54. The upper end of the upper bearing support 59 contains a lower drive shaft bearing ~Z positioned adjacent the universal joint 55 for support of the lower drive shaft 54.
The steering assembly and trimming assembly - 1317166 1~7~/2 generally include ~ central passdgeway t~rein forming a clc,sed compartment or enclosure ~3 around the drive shaft means 25 and particularly the universal ioint 55 as shown in Figure 5. The enclosure b3 extends from within the steering member 37 do~n to within the lower unit adapter 24. A tubular upper end portion ~4 within the steering member 37 forms the upper portion of the enclosures 63 and a tubular lower end portion 65 between the upward trunnion 45 forms a lower end of the enclosure b3.
flexible cover or universal jo}nt bellows b6 extends between the upper end portion b4 and the lower end portion bS to cover the universal joint 55. The bellows 66 is a resilient tubular connector which is slipped over the end portions 64 and 65 and fastened therewith by a hose clamp 67. The enclosure protects the universal joint 55 from water.
The L-Drive 10 also includes a shift assembly ~not shown) for operating the clutch ~not shown) in the lower unit Z3, an enoine water cooling system including a drive shaft driven pump ~not shown) and an engine exhaust system ~8.
The ~oat The boat 11 as shown in Figures la, lb, and lc includes a planing hull 70 and a generally vertical upri~ht transom 71. The hu1170 includes a bottom planing surface 72 and cavity 73 adjacent the transom 71. The cavity 71 extends upwardly into the hull 70 and has an open end extending through a notch 74 in the transom 71.
The cavity 73 includes a first portside wall 75, a second starboard side wall 7b and a third forward wall 77.
The forward wall 77 is preferably vertically upright similar to the transom 71. The forward wall 77 is positioned as far rearward as possible against the drive 14 to provide maximum bottom planing surface 72 forward of the drive 14. A hole 73 as shown in Figure 4 is formed in the top 77 of the cavity 73 to _~_ t317166 ~ ~a~/~
attac~ the mounting assembly 13.
ODeratior. of the Steering and ~rimming Svstem Steering and trimming of the L-Drive 10 is easily accomplished. To steer the boat 11, the driver turns the boat steering wheel which operates the boat steering system to turn the drive 14. To trim the boat 11, the operator operates the boat hydraulic system to power the hydraulic trim cylin~er 47 to lift or lower the drive 14. The steering of the drive 14 is about the horizontal axis T-~.
The steering i5 totally independent from the trimming or tilting. In other words, the operator can steer at any trim position and the operator can trim at any steered position.
The steering of the drive 14 is further described with respect to Figure 3 and 5. When the steering arm 40 is moved by the steering system of the boat 11, it rotates the steering member 37 to steer the drive 14. Steering the drive 14 redirects the propeller thrust. The redirected propeller thrust changes the direction of the boat 11 thereby directing or steering the boat in the oesired path.
In Figure 7 ~a bottom elevation view)~ the drive 14a ~shown in phantom lines) illustrates steering trJ starboard and the drive 14b ~shown in phantom lines) illustrates steering to port.
The trimming of the drive is further described with respect to Figures ~. When the drive 14 is being trimmed it swings up-and down about the hori20ntal pivot axis 27 or T-T. Swinging of the drive 14 changes the angle of the propeller thrust direction to lift or lower the bow of the boat. The range of angular direction of the propeller thrust from a boat stopped condition to an on plane condition generally defines the range of trim. The range of tilt is upwardly from the maximum up r,r out trim position to the highest position available. The tilt range `` 1317166 1~3~/2 is used to change the propeller and to lift the drive 14 when removing the ~oat 11 from the water on a trailer of for transporting storage. The propeller thrust is generally not used or available i the tilt-range therefore steering does not occur. In Figure a, the drive 14a (shown in phantom) shows a generally operating trim position and the drive 14b ~shown in phantom) shows a generally up-tilt position.
While an embodiment and application of the invention has been shown and describèd, it would be apparent 0 to those skilled in the art that modifications are possible without departing from the invention concepts herein.
Therefore, the invention is not to be restricted other than by the scope and equivalency of the following claims.
Claims (26)
1. A propulsion device for a boat having a bottom surface comprising:
an engine for positioning inside the boat:
a propeller drive for positioning under said bottom surface of said boat;
a mounting assembly for mounting within said bottom surface of said boat between said engine and said drive;
a steering assembly rotatably connecting said drive to said mounting assembly, said steering assembly having a tubular portion extending upwardly through said mounting assembly, said steering assembly rotating within said mounting assembly about a generally vertical axis;
a trimming system for connecting the drive to said steering assembly for providing a limited range of horizontal swinging movement therefrom; and a drive shaft means drivably coupling said drive to said engine.
an engine for positioning inside the boat:
a propeller drive for positioning under said bottom surface of said boat;
a mounting assembly for mounting within said bottom surface of said boat between said engine and said drive;
a steering assembly rotatably connecting said drive to said mounting assembly, said steering assembly having a tubular portion extending upwardly through said mounting assembly, said steering assembly rotating within said mounting assembly about a generally vertical axis;
a trimming system for connecting the drive to said steering assembly for providing a limited range of horizontal swinging movement therefrom; and a drive shaft means drivably coupling said drive to said engine.
2. The propulsion device defined in claim 1 wherein said mounting assembly includes a central member portion, and wherein said central member portion and said tubular portion include a cooperating bearing support and said steering assembly includes a bearing within said cooperating bearing support, said bearing rotatably supporting said tubular portion of said steering assembly in said central member portion for rotation therein about said generally vertical axis.
3. The propulsion device defined in claim 1 wherein said drive shaft means includes an upper drive shaft drivably connected through said mounting assembly, said upper drive shaft positioned through a drive shaft passageway formed in said tubular portion of said steering assembly, whereby said tubular portion with said drive shaft passageway rotates.
4. The propulsion device defined in claim 3 wherein said upper drive shaft and said tubular portion are concentrically positioned for relative rotation with respect to said mounting assembly, whereby said tubular portion rotates during steering and whereby said drive shaft rotates to provide drive power transmission to said propeller drive.
5. A propulsion device for a boat having a bottom surface comprising:
an engine for positioning inside the boat;
a propeller drive for positioning under said bottom surface of said boat;
a mounting assembly for mounting within said bottom surface of said boat between said engine and said drive;
a steering assembly rotatably connecting said drive to rotate within said mounting assembly on a generally vertical axis, said steering assembly having a depending portion for horizontally pivotably connecting to said drive, said steering assembly having a drive shaft passageway therein, a trimming assembly having an upwardly extending portion for said horizontally pivotably connecting with said steering assembly, said trimming assembly supporting said drive for providing horizontal swinging movement thereof on a generally horizontal axis whereby said steering assembly rotates within said mounting assembly for steering of said drive and whereby said trimming assembly rotates as a unit with said steering assembly on said generally vertical axis during steering and further swings on said generally horizontal axis during trimming.
an engine for positioning inside the boat;
a propeller drive for positioning under said bottom surface of said boat;
a mounting assembly for mounting within said bottom surface of said boat between said engine and said drive;
a steering assembly rotatably connecting said drive to rotate within said mounting assembly on a generally vertical axis, said steering assembly having a depending portion for horizontally pivotably connecting to said drive, said steering assembly having a drive shaft passageway therein, a trimming assembly having an upwardly extending portion for said horizontally pivotably connecting with said steering assembly, said trimming assembly supporting said drive for providing horizontal swinging movement thereof on a generally horizontal axis whereby said steering assembly rotates within said mounting assembly for steering of said drive and whereby said trimming assembly rotates as a unit with said steering assembly on said generally vertical axis during steering and further swings on said generally horizontal axis during trimming.
6. The propulsion device defined in claim 5 wherein said steering assembly and said trimming assembly have a common passageway therebetween, said passageway forming a drive shaft enclosure.
7. The propulsion device defined in claim 6 further including a lower end portion within said depending portion, an upper end portion within said upwardly extending portion and a drive shaft flexible housing sealably connected between said upper end portion and lower end portion.
8. A propulsion device for a boat having a bottom surface comprising:
an engine for positioning inside the boat;
a propeller drive for positioning under said bottom surface of said boat;
a mountinghorizonal assembly for mounting within said bottom surface of said boat between said engine and said drive;
a steering assembly having a trimming assembly mounted thereto, said steering assembly connecting said drive to rotate on a generally vertical axis within said mounting assembly for generally vertical rotation for steering, said trimming assembly providing for generally horizonal rotation for trimming, said steering and trimming assembly including a drive shaft passageway means providing a sealed enclosure within said steering and trimming assembly during said trimming; and a drive shaft means drivably coupling said engine with said drive through said drive shaft passageway means.
an engine for positioning inside the boat;
a propeller drive for positioning under said bottom surface of said boat;
a mountinghorizonal assembly for mounting within said bottom surface of said boat between said engine and said drive;
a steering assembly having a trimming assembly mounted thereto, said steering assembly connecting said drive to rotate on a generally vertical axis within said mounting assembly for generally vertical rotation for steering, said trimming assembly providing for generally horizonal rotation for trimming, said steering and trimming assembly including a drive shaft passageway means providing a sealed enclosure within said steering and trimming assembly during said trimming; and a drive shaft means drivably coupling said engine with said drive through said drive shaft passageway means.
9. The propulsion device defined in claim 8 wherein said drive shaft means includes an upper drive shaft, a lower drive shaft and a universal joint connecting said upper and lower drive shafts, said upper and lower drive shafts and said universal joint positioned within said drive shaft passageway means for providing drive power transmission therethrough during said steering and said trimming, whereby said lower drive shaft bends with respect to said upper drive shaft on a generally horizontal axis at said universal joint during said trimming of said drive.
10. The propulsion device defined in claim 9 wherein said universal joint is positioned within a flexible portion of said steering and trimming assembly, said flexible portion providing flexing during said -trimming, whereby said flexible portion flexes in the bending direction of said lower drive shaft.
11. A propulsion device for a boat having a bottom surface comprising:
an engine for positioning inside the boat;
a propeller drive for positioning under said bottom surface of said boat;
a mounting assembly for mounting within said bottom surface of said boat between said engine and said drive, said mounting assembly including a boat mounting portion for mounting with the boat and a drive mounting portion having a central member for mounting with the drive;
a steering assembly for connecting said drive to said mounting assembly, said steering assembly constructed to rotate about a generally vertical axis within said mounting assembly;
a trimming assembly for connecting the drive to said steering assembly for providing a limited range of horizontal swinging movement therefrom; and a drive shaft means drivable coupling said engine to said drive, said drive shaft means Including an upper drive shaft drivably connecting through said mounting assembly coaxial with said generally vertical axis.
an engine for positioning inside the boat;
a propeller drive for positioning under said bottom surface of said boat;
a mounting assembly for mounting within said bottom surface of said boat between said engine and said drive, said mounting assembly including a boat mounting portion for mounting with the boat and a drive mounting portion having a central member for mounting with the drive;
a steering assembly for connecting said drive to said mounting assembly, said steering assembly constructed to rotate about a generally vertical axis within said mounting assembly;
a trimming assembly for connecting the drive to said steering assembly for providing a limited range of horizontal swinging movement therefrom; and a drive shaft means drivable coupling said engine to said drive, said drive shaft means Including an upper drive shaft drivably connecting through said mounting assembly coaxial with said generally vertical axis.
12. The propulsion device defined in claim 1 wherein said drive mounting assembly includes a boat connector for attaching to a boat bottom surface, and a retaining member removably positioned between said drive mounting assembly and the boat connector.
13. The propulsion device defined in claim 12 wherein the retaining member is resilient for providing sealing and vibration isolation from the device to the boat.
14. The propulsion device defined in claim 12 wherein one of the central member and boat connector include two opposing portions which clamp said retaining member therebetween; one of said opposing portions being removable to disengage said central member from said boat connector.
15. A propuision device for a boat comprising an engine for positioning inside the boat said engine positioned with the crankshaft vertical and output end of crankshaft down, a propeller drive for positioning under a bottom surface of the boat, a mounting assembly between said engine and said drive, said mounting assembly including an engine mounting portion for mounting the engine, a steering assembly for connecting said drive to said mounting assembly, said steering assembly constructed to rotate about a generally vertical axis with said mounting assembly, said steering assembly including a steering member having a steering arm fixed thereto, and a drive shaft means drivably coupling said engine with said drive, said drive shaft means including an upper drive shaft drivably connecting through said mounting assembly coaxial with said generally vertical axis.
16. The propulsion device defined in claim 15 wherein said engine mounting portion includes upwardly extending mounts providing vertical height clearance and rotational clearance therebetween to permit turning of said steering arm within a desired steering range.
17. The propulsion device defined in claim 15 wherein said drive shaft means includes an upper drive shaft coaxial to said vertical steering axis, said drive shaft coaxially coupling with said output end of said engine crankshaft.
18. The propulsion device defined in claim 17 wherein said coupling is within said engine mounting portion.
19. The propulsion device defined in claim 17 wherein said coupling is an internal spline within said crankshaft output end and an engaging external spline on the upper end of said drive shaft.
20. The propulsion device defined in claim 15 wherein said steering assembly includes a trimming assembly having a horizontal trimming axis, said propulsion device further including a universal joint connected at the lower end of said upper drive shaft, said universal joint providing a drive angle change at about said horizontal trimming axis.
21. The propulsion device defined in claim 16 wherein said engine mounting portion includes an engine adapter member removably attached between said upwardly extending mounts and said engine.
22. A propulsion device for a boat comprising an engine for positioning inside the boat;
a propeller drive for positioning under a bottom surface of the boat;
a mounting assembly constructed to be mounted at a generally horizontal surface of said boat between said engine and said drive;
a steering and trimming assembly, said steering assembly rotatably connecting said drive to said mounting assembly, said steering assembly having a depending first trunnion, said trimming assembly connecting said drive to said steering assembly and having an upwardly extending second trunnion, said first trunnion engaging with said second trunnion at a common horizontal pivot means for providing swinging upward movement of said drive, said steering and trimming assembly having a drive shaft enclosure therein; and a drive shaft means including an upper drive shaft, a lower drive shaft, a universal joint connecting said upper and lower drive shafts, said upper and lower drive shafts and said universal joint positioned within said drive shaft enclosure.
a propeller drive for positioning under a bottom surface of the boat;
a mounting assembly constructed to be mounted at a generally horizontal surface of said boat between said engine and said drive;
a steering and trimming assembly, said steering assembly rotatably connecting said drive to said mounting assembly, said steering assembly having a depending first trunnion, said trimming assembly connecting said drive to said steering assembly and having an upwardly extending second trunnion, said first trunnion engaging with said second trunnion at a common horizontal pivot means for providing swinging upward movement of said drive, said steering and trimming assembly having a drive shaft enclosure therein; and a drive shaft means including an upper drive shaft, a lower drive shaft, a universal joint connecting said upper and lower drive shafts, said upper and lower drive shafts and said universal joint positioned within said drive shaft enclosure.
23. The propulsion device defined in claim 22 wherein said upper and lower drive shafts are rotatably supported by a drive shaft bearing within said enclosure whereby said support provided by said drive shaft bearing is adjacent said universal joint.
24. The propulsion device defined in claim 23 wherein said enclosure adjacent said universal joint is a flexible bellows tubular connector, said tubular connector bending without touching said universal joint during swinging of said drive about said horizontal pivot means to trim whereby said bending occurs only about a horizontal axis defined by said horizontal pivot means.
25. A propulsion device for a boat comprising:
an engine for positioning inside the boat;
a propeller drive for positioning under a bottom surface of the boat, said drive having a first trim cylinder mounting pivot;
a mounting assembly between said engine and said drive;
a steering member supporting said drive within said mounting assembly for rotation about a generally vertical axis, said steering member having a second trim cylinder mounting pivot under said mounting assembly a trimming assembly for connecting said drive to said steering member for rotation about a generally horizontal axis, said trimming assembly operatively rotating said drive about said generally horizontal axis for changing the trim angle; and a drive shaft means drivably coupling said engine with said drive.
an engine for positioning inside the boat;
a propeller drive for positioning under a bottom surface of the boat, said drive having a first trim cylinder mounting pivot;
a mounting assembly between said engine and said drive;
a steering member supporting said drive within said mounting assembly for rotation about a generally vertical axis, said steering member having a second trim cylinder mounting pivot under said mounting assembly a trimming assembly for connecting said drive to said steering member for rotation about a generally horizontal axis, said trimming assembly operatively rotating said drive about said generally horizontal axis for changing the trim angle; and a drive shaft means drivably coupling said engine with said drive.
26. The propulsion device defined in claim 25 wherein said first and second trim cylinder mounting pivots are positioned and connected by a trim cylinder means with said trim cylinder means retracted at full in-trim condition, said cylinder means extending to lift said drive.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US6244987A | 1987-06-15 | 1987-06-15 | |
| US07/062,449 | 1987-06-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1317166C true CA1317166C (en) | 1993-05-04 |
Family
ID=22042561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000567973A Expired - Fee Related CA1317166C (en) | 1987-06-15 | 1988-05-27 | Boat propulsion device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0194095A (en) |
| CA (1) | CA1317166C (en) |
| GB (1) | GB2208110B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB854788A (en) * | 1958-01-14 | 1960-11-23 | Transp Equipment Thornycroft L | Improvements in or relating to power-propelled boats |
| GB897086A (en) * | 1958-01-20 | 1962-05-23 | Edward Leipert | A screw propeller marine propulsion and steering device |
| GB1422160A (en) * | 1972-04-25 | 1976-01-21 | Scott C W | Marine propulsion apparatus |
| US3841257A (en) * | 1973-02-06 | 1974-10-15 | Outboard Marine Corp | High performance stern drive |
| IT1018254B (en) * | 1973-07-23 | 1977-09-30 | Hirmann G | PROPULSION DEVICE FOR NA TANTS |
| NL7802156A (en) * | 1978-02-27 | 1979-08-29 | Schottel Nederland Bv | VESSEL WITH TILTABLE RUDDER PROPELLER AND CONSTRUCTION UNIT INTENDED FOR SUCH VESSELS. |
| US4600395A (en) * | 1979-05-31 | 1986-07-15 | Ab Volvo Penta | Boat drive |
| SE446713B (en) * | 1981-02-10 | 1986-10-06 | Verkstadsservice Ab | INU DRIVE CONTROL DEVICE |
-
1988
- 1988-05-27 CA CA000567973A patent/CA1317166C/en not_active Expired - Fee Related
- 1988-06-14 JP JP63146678A patent/JPH0194095A/en active Pending
- 1988-06-15 GB GB8814212A patent/GB2208110B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| GB2208110B (en) | 1991-07-31 |
| GB8814212D0 (en) | 1988-07-20 |
| GB2208110A (en) | 1989-03-01 |
| JPH0194095A (en) | 1989-04-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |