US20020003342A1 - Self-aligning hitch - Google Patents
Self-aligning hitch Download PDFInfo
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- US20020003342A1 US20020003342A1 US09/726,410 US72641000A US2002003342A1 US 20020003342 A1 US20020003342 A1 US 20020003342A1 US 72641000 A US72641000 A US 72641000A US 2002003342 A1 US2002003342 A1 US 2002003342A1
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- tongue
- hitch
- housing
- pin
- aperture
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/48—Traction couplings; Hitches; Draw-gear; Towing devices characterised by the mounting
- B60D1/52—Traction couplings; Hitches; Draw-gear; Towing devices characterised by the mounting removably mounted
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/14—Draw-gear or towing devices characterised by their type
- B60D1/143—Draw-gear or towing devices characterised by their type characterised by the mounting of the draw-gear on the towed vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/14—Draw-gear or towing devices characterised by their type
- B60D1/145—Draw-gear or towing devices characterised by their type consisting of an elongated single bar or tube
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/24—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions
- B60D1/36—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for facilitating connection, e.g. hitch catchers, visual guide means, signalling aids
- B60D1/40—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for facilitating connection, e.g. hitch catchers, visual guide means, signalling aids involving a temporarily extensible or alignable member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/24—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions
- B60D1/42—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for being adjustable
- B60D1/44—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for being adjustable horizontally
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Agricultural Machines (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
A hitch for coupling a towing vehicle and a trailer vehicle, particularly in situations where the vehicles are misaligned. The hitch has a tongue housing for attachment to one of the vehicles and a tongue for extension and retraction within a throat defined by the tongue housing. The tongue articulates laterally to couple misaligned vehicles. The tongue has a coupler, such as a clevis, ring or ball, on one end to effect coupling between the two vehicles. The tongue is movable to a locked position where a spring-biased pin is insertable through apertures in the tongue housing and the tongue to lock it in place. The tongue and the tongue housing have cooperating guide members to effect a smooth, guided movement of the tongue from an extended position to its retracted, locked position. The guide members have cooperating, rounded cam members and pockets which facilitate the smooth, guided movement of the tongue to its locked position. The tongue has a trunnion near to the end opposite the coupler to prevent the tongue from being completely withdrawn from the throat. Rounded side walls of the tongue housing define a generally hourglass shaped throat. The side walls guide the tongue during retraction into the housing, assisting in the smooth, guided movement to its locked position. The tongue housing may be configured to accommodate therein the entire length of the tongue when it is in its fixed, locked position.
Description
- This application is a continuation-in-part of U.S. patent application no. 09/612,569, filed Jul. 7, 2000.
- This invention pertains to hitches, and more particularly to self-aligning hitches for coupling two imprecisely aligned vehicles, for example, a towing vehicle and a trailer vehicle.
- Hitches are in wide use for towing many kinds of trailer vehicles by towing vehicles. Most traditional hitches comprise the combination of a first coupling means (for example, a ball) attached to one of the vehicles and a second coupling means (for example, a hollow, hemispherical coupler) attached to the other. Since such conventional coupling means are fixedly attached to the vehicles, it is necessary for the vehicles to be brought into precise alignment in order to achieve coupling. This can be a difficult and time-consuming task. In circumstances where precise alignment is not achieved, it may be possible to manually move the trailer vehicle to a position for coupling to the towing vehicle. While this may be acceptable for lightweight trailer vehicles, it is a near-impossible task for heavier trailer vehicles such as loaded airport freight carts. Persons attempting to manually position a heavy trailer vehicle may suffer injuries.
- Further, it is desirable to prevent the need for a second person to assist in coupling the towing and trailer vehicles. In general, having a second person, located behind the towing vehicle, to direct the operator of the towing vehicle presents dangerous circumstances. Further, it is inefficient to require two people to achieve a result which could be accomplished by a single person.
- In general, the prior art has attempted to address these problems with the provision of a hitch assembly comprising a tongue or rod which is slidably insertable into a housing mounted on one of the vehicles and which is capable of some longitudinal and lateral movement so that a rearward end of the tongue, fitted with a coupling means, can be manually positioned to engage the corresponding coupling means on the other vehicle. The hitch assemblies of some prior art references provide an automatic locking mechanism which locks the tongue into a “locked” position.
- However, the prior art hitch assemblies may suffer from one or more disadvantages. For example, several prior art hitch assemblies have been designed in such a way that it is only possible for the tongue to move to the “locked” position after the tongue becomes aligned with the vehicles. As a result, after the vehicles are coupled and the towing vehicle is moved forward from a slightly displaced lateral position (relative to the trailer vehicle), the tongue may be susceptible to banging from side to side within the housing until the tongue and the two vehicles achieve precise alignment. This is disadvantageous since it: (1) may damage the sides of the housing, ultimately requiring repair or replacement; and (2) may place undue pressure on the pivot pin retaining the proximal end of the tongue within the housing. After a period of time, the pin may become damaged to the point where repair or replacement is necessary.
- Along the same lines, several prior art hitch assemblies are designed in such a way that lateral movement of the tongue is not immediately possible after the locking mechanism is disengaged. Rather, the operator is required to withdraw the tongue entirely, or nearly so, from within the housing until lateral movement of the tongue is possible. This limits the use of the hitch assembly. In some circumstances, the operator may have backed the towing vehicle into close proximity to the trailer vehicle so that the tongue cannot be fully withdrawn since it will engage the front portion of the trailer vehicle. Since lateral movement is then not possible (since the tongue is not capable of being fully extended from the housing), the operator would be forced to get back into the towing vehicle and move it ahead to create sufficient space between the vehicles to enable full extension of the tongue, and thus, lateral movement of the tongue. This adds unnecessary time and effort into the process, and could be eliminated if one could laterally position the tongue immediately upon disengagement of the locking mechanism.
- Prior art hitch assemblies which may suffer from one or both of the above-noted disadvantages are described in: U.S. Pat. No. 3,912,119, issued to Hill et al., U.S. Pat. No. 2,871,029, issued to Demarest, U.S. Pat. No. 3,860,267, issued to Lyons and U.S. Pat. No. 4,991,865, issued to Francisco.
- The hitch assemblies described in Demarest, Hill et al., and Francisco may be susceptible to damage to the housing while the tongue is moving into the housing and towards its locked position from either side-to-side banging of the tongue therein, or from the longitudinal engagement of a proximal end of the tongue on a closed interior of the housing.
- Other prior art hitch assemblies include overly complex mechanisms which may render the hitch assembly too expensive for commercial application or too cumbersome for retrofitting existing towing vehicles. For example, U.S. Pat. No. 4,558,883, issued to Bouma, discloses such a complicated hitch mechanism.
- Some prior art hitch assemblies, such as the one disclosed in U.S. Pat. No. 5,277,447, issued to Blaser, disclose housing and tongue designs which allow limited lateral movement of the tongue. This may be disadvantageous if the towing vehicle is sufficiently misaligned relative to the trailer vehicle to be outside the lateral movement range of the tongue. Repeated positioning of the towing vehicle relative to the trailer vehicle would be required to overcome such a limitation.
- It is an object of the present invention to provide a hitch for coupling two vehicles, particularly in situations where the vehicles are misaligned.
- In accordance with an aspect of this invention, a hitch for coupling a first vehicle to a second vehicle is disclosed. The hitch comprises: (a) a tongue housing for attaching to the first vehicle, the tongue housing having a forward end and a rear end, the tongue housing comprising a top wall, a bottom wall spaced apart from the top wall by two spaced apart side walls disposed therebetween, the top, bottom and side walls defining a throat, the throat having an open first end and an open second end; (b) a first guide member attached to the housing, comprising: (i) a first cam member; (ii) a first pocket and a second pocket, the first and second pockets being located on either side of the first cam member; (c) a tongue having a first end and a second end, the tongue being extendable and retractable within the throat, the tongue having a width narrower than the distance between the two spaced apart side walls of the tongue housing; (d) retaining means for preventing the tongue from being removed from the throat; (e) a second guide member, coplanar with the first guide member and attached to the second end of the tongue, the second guide member comprising: (i) a second cam member and a third cam member; (ii) a third pocket located between the second and third cam members; (f) a coupler attached to the second end of the tongue; wherein the first and second guide members become matingly engaged upon retraction of the tongue within the throat and wherein the first and second guide members cooperate to align the tongue with the first and second vehicles by the mating engagement of the first cam member with the third pocket and the second and third cam members with the first and second pockets; (g) lock means for locking the tongue in a fixed position relative to the tongue housing upon full engagement of the first and second guide members; and wherein the tongue is capable of lateral articulation when the tongue is not locked in the fixed position.
- The cam members and the pockets may be rounded. The second guide member may pivot about either of the first pocket or the second pocket upon the retraction of the tongue from a laterally misaligned position. The bottom wall of the tongue housing may be the first guide member. The side walls of the tongue housing may be centrally rounded to define a generally hourglass shaped throat between the top and bottom walls.
- The top wall of the tongue housing may define a first aperture therethrough and the tongue may define a second aperture therethrough in a location intermediate to the first and second ends of the tongue, the first and second apertures being aligned upon full engagement of the first and second guide members. The lock means may be a lock pin insertable through the first and second apertures. The bottom wall may also define a third aperture therethrough for insertion of the lock pin, the third aperture being aligned with the first aperture. The hitch may further comprise means for biasing the pin towards insertion into the first, second and third apertures. The means for biasing the pin towards insertion into first, second and third apertures may be a first spring on the lock pin, the first spring mounted between a top wall of a lock pin housing attached to the top wall of the tongue housing and a spring retaining member mounted on an intermediate portion of the lock pin, the top wall of the lock pin housing further comprising a fourth aperture for insertion of the lock pin, the fourth aperture being aligned with the first and third apertures and wherein the second aperture becomes aligned with the first, third and fourth apertures upon full engagement of the first and second guide members. The lock pin housing may comprise opposed, bevelled side walls.
- The coupler may be selected from the group consisting of a clevis, a ring and a ball.
- The coupler may be a clevis comprising: (a) an upper arm, the upper arm defining a first aperture therethrough; (b) a lower arm, the upper and lower arms being spaced apart by a vertical arm support wall, wherein the upper and lower arms define an opening facing away from the first vehicle for the insertion therein of a coupling means of the second vehicle; (c) a hitch pin insertable through the first aperture, the hitch pin being movable between a first, raised position and a second, lowered position, the hitch being capable of receiving the coupling means of the second vehicle when the hitch pin is in the first, raised position; (d) a release member extending above an upper surface of the horizontal upper arm and through a second aperture defined in the upper arm; (e) a hitch pin engaging member housed between a first shelf and a second shelf within the upper arm, the first shelf and the second shelf being on either side of the first aperture, the hitch pin engaging member defining a third aperture therethrough for accommodating the insertion of the hitch pin, a lower end of the release member contacting a first end of the hitch pin engaging member; (f) a second spring mounted within the first shelf, the second spring contacting the hitch pin engaging member, wherein the bias of the second spring maintains the hitch pin engaging member in an angled position to frictionally engage the hitch pin; and wherein application of downward force upon the release member causes the hitch pin engaging member to move to a substantially horizontal position against the bias of the second spring and frictionally disengage the hitch pin to permit upward vertical movement of the hitch pin within the first and third apertures.
- The vertical arm support wall may abut the tongue housing upon full engagement of the first and second guide members.
- The movement of the hitch pin from the first, raised position to the second, lowered position may be achieved through the application of downward force upon the hitch pin and wherein movement of the hitch pin from the second, lowered position to the first, raised position is achieved by lifting the hitch pin after the pin engaging member is frictionally disengaged from the hitch pin through the application of downward force upon the release member, causing the hitch pin engaging member to move to the substantially horizontal position.
- The hitch pin may comprise a sleeve at its lower end and the upper arm may comprise a flange extending into the first aperture to define a radius smaller than the radius of the sleeve, so that the hitch pin cannot be fully withdrawn from the first aperture. The lower arm may define a fourth aperture aligned with the first aperture. A flange may extend into the fourth aperture to define a radius smaller than the radius of the sleeve so that the lower end of the hitch pin cannot extend through the lower arm of the clevis.
- The hitch may comprise a first vertical wall substantially enclosing a forward end of the tongue housing and defining a slot therein, the slot having a width of at least the distance between the side walls of the tongue housing and having a height of at least the thickness of the tongue. The retaining means for preventing the tongue from being removed from the throat may comprise a trunnion extending through the tongue at a location proximal to the first end of the tongue, the trunnion having a height greater than the height of the slot in the vertical wall.
- The hitch may comprise a first square tubing portion attached to and extending from the tongue housing towards the first vehicle, the first square tubing portion having means for attaching the first square tubing portion to a cooperating second square tubing portion attached to and extending from the vehicle.
- The length of the top wall of the tongue housing may extend beyond the first end of the tongue when the tongue is in the fixed position.
- The tongue housing may also comprise a second vertical wall for attaching the forward end of the tongue housing to the first vehicle, the second vertical wall being attached to and extending substantially perpendicular to the top wall of the tongue housing.
- The tongue housing may also comprise a third side wall and fourth side wall, the third and fourth side walls being attached to and extending downwardly from the opposite forward side edges of the top wall.
- The tongue housing may be wider at its forward end than at its rear end.
- In accordance with another aspect of the invention, a hitch capable of coupling a first vehicle to a laterally misaligned second vehicle is disclosed. The hitch comprises: (a) a tongue housing for attaching to the first vehicle, the tongue housing comprising two spaced apart side walls defining a throat; (b) a first guide member attached to the housing, comprising: (i) a first cam member; (ii) a first pocket and a second pocket, the first and second pockets being located on either side of the first cam member; (c) a tongue having a first end and a second end, the tongue being extendable and retractable within the throat, the tongue having a width narrower than the distance between the two spaced apart side walls of the tongue housing; (d) a second guide member, coplanar with the first guide member and attached to the second end of the tongue, comprising: (i) a second cam member and a third cam member; (ii) a third pocket located between the second and third cam members; (e) a coupler attached to the second end of the tongue; wherein the first and second guide members become matingly engaged in an aligned, locked position upon the full retraction of the tongue within the throat from a laterally misaligned position; and wherein the tongue is guided from the laterally misaligned position into the aligned, locked position through the combination of: (i) the mating engagement of the first cam member with the third pocket and the second and third cam members with the first and second pockets; and (ii) the guided retraction of the tongue along at least one of the side walls of the tongue housing.
- In accordance with another aspect of the invention, the bottom wall may also comprise a fourth pocket positioned opposite of the first cam member. In this case, the retaining means for preventing the tongue from being removed from the throat may comprise a trunnion attached to and extending below the tongue at a location proximal to the first end of the tongue, wherein the trunnion engages the fourth pocket upon full extension of the tongue.
- The cam members and the pockets may be rounded. The bottom wall of the tongue housing may be the first guide member. The side walls of the tongue housing may be centrally rounded to define a generally hourglass shaped throat between the top and bottom walls.
- The top wall of the tongue housing may define a first aperture therethrough and the tongue may define a second aperture therethrough in a location intermediate to the first and second ends of the tongue, the first and second apertures being aligned upon fall engagement of the first and second guide members. The lock means may be a lock pin insertable through the first and second apertures. The bottom wall may also define a third aperture therethrough for insertion of the lock pin, the third aperture being aligned with the first aperture. The hitch may firther comprise means for biasing the pin towards insertion into the first and second apertures. The means for biasing the pin towards insertion into first and second apertures may be a first spring on the lock pin, the first spring mounted between a top wall of a lock pin housing attached to the top wall of the tongue housing and a spring retaining member mounted on an intermediate portion of the lock pin, the top wall of the lock pin housing further comprising a third aperture for insertion of the lock pin, the third aperture being aligned with the first aperture and wherein the second aperture becomes aligned with the first and third apertures upon full engagement of the first and second guide members. The lock pin housing may comprise opposed, bevelled side walls.
- The coupler may be selected from the group consisting of a clevis, a ring and a ball.
- The coupler may be a clevis comprising: (a) an upper arm, the upper arm defining a first aperture therethrough; (b) a lower arm, the upper and lower arms being spaced apart by a vertical arm support wall, wherein the upper and lower arms define an opening facing away from the first vehicle for the insertion therein of a coupling means of the second vehicle; (c) a hitch pin insertable through the first aperture, the hitch pin being movable between a first, raised position and a second, lowered position, the hitch being capable of receiving the coupling means of the second vehicle when the hitch pin is in the first, raised position; (d) a release member extending above an upper surface of the horizontal upper arm and through a second aperture defined in the upper arm; (e) a hitch pin engaging member housed between a first shelf and a second shelf within the upper arm, the first shelf and the second shelf being on either side of the first aperture, the hitch pin engaging member defining a third aperture therethrough for accommodating the insertion of the hitch pin, a lower end of the release member contacting a first end of the hitch pin engaging member; (f) a second spring mounted within the first shelf, the second spring contacting the hitch pin engaging member, wherein the bias of the second spring maintains the hitch pin engaging member in an angled position to frictionally engage the hitch pin; and wherein application of downward force upon the release member causes the hitch pin engaging member to move to a substantially horizontal position against the bias of the second spring and frictionally disengage the hitch pin to permit upward vertical movement of the hitch pin within the first and third apertures.
- The vertical arm support wall may abut the tongue housing upon full engagement of the first and second guide members.
- The movement of the hitch pin from the first, raised position to the second, lowered position may be achieved through the application of downward force upon the hitch pin and wherein movement of the hitch pin from the second, lowered position to the first, raised position is achieved by lifting the hitch pin after the pin engaging member is frictionally disengaged from the hitch pin through the application of downward force upon the release member, causing the hitch pin engaging member to move to the substantially horizontal position.
- The hitch pin may comprise a sleeve at its lower end and the upper arm may comprise a flange extending into the first aperture to define a radius smaller than the radius of the sleeve, so that the hitch pin cannot be fully withdrawn from the first aperture. The lower arm may define a fourth aperture aligned with the first aperture. A flange may extend into the fourth aperture to define a radius smaller than the radius of the sleeve so that the lower end of the hitch pin cannot extend through the lower arm of the clevis.
- The hitch may comprise a first square tubing portion attached to and extending from the tongue housing towards the first vehicle, the first square tubing portion having means for attaching the first square tubing portion to a cooperating second square tubing portion attached to and extending from the vehicle.
- The length of the top wall of the tongue housing may extend beyond the first end of the tongue when the tongue is in the fixed position.
- The tongue housing may also comprise a second vertical wall for attaching the forward end of the tongue housing to the first vehicle, the second vertical wall being attached to and extending substantially perpendicular to the top wall of the tongue housing.
- The tongue housing may also comprise a third side wall and fourth side wall, the third and fourth side walls being attached to and extending downwardly from the opposite forward side edges of the top wall.
- The tongue housing may be wider at its forward end than at its rear end.
- In accordance with another aspect of the invention, a hitch for coupling a towing vehicle to a trailer vehicle is disclosed. The hitch comprises: (a) a tongue housing for attaching to the towing vehicle, the tongue housing having a forward end and a rear end and comprising a top wall, a bottom wall spaced apart from the top wall by two spaced apart and centrally rounded side walls disposed therebetween and a vertical wall for attaching said forward end of said tongue housing to said towing vehicle, the vertical wall being attached to and extending substantially perpendicular to the top wall of the tongue housing, the top, bottom and side walls defining a throat, the throat having an open first end and an open second end and being generally hourglass shaped, the top wall defining a first aperture therethrough; (b) a tongue having a first end and a second end, the tongue being extendable and retractable within the throat, the tongue having a width narrower than the distance between the two spaced apart side walls, the tongue defining a third aperture therethrough in a position intermediate to the first and second ends of the tongue; (c) the bottom wall comprising a first guide member, the first guide member comprising: (i) a first rounded cam member; (ii) a first rounded pocket and a second rounded pocket, the first and second pockets being located on either side of the first cam member; and (iii) a fourth rounded pocket positioned opposite of the first rounded cam member; (d) a trunnion attached to and extending below the tongue at a location proximal to the first end of the tongue, wherein the trunnion engages the third pocket upon full extension of the tongue; (e) a second guide member, coplanar with the first guide member and attached to the second end of the tongue, the second guide member comprising: (i) a second rounded cam member and a third rounded cam member; (ii) a third rounded pocket located between the second and third cam members; (f) a coupler attached to second end of the tongue; wherein the second guide member is matingly received by the first guide member upon retraction of the tongue within the throat and wherein the first and second guide members cooperate to align the tongue with the towing and trailer vehicles by the mating engagement of the first cam member with the third pocket and the second and third cam members with the first and second pockets; (g) a lock pin housing attached to the top wall of the tongue housing, the lock pin housing comprising a top wall and two opposed side walls, the top wall of the lock pin housing defining a third aperture therethrough, the aperture being aligned with the third aperture; (h) a lock pin insertable through the first, second and third apertures; (i) a spring mounted on the lock pin between the top wall of the lock pin housing and a spring retaining member mounted on an intermediate portion of the lock pin, the spring biasing the lock pin towards insertion into the first, second and third apertures; wherein: k) when the first, second and third apertures become aligned upon full reception of second guide member by the first guide member the lock pin is inserted into the first, second and third apertures to lock the tongue in a fixed position relative to the housing; (k) the tongue is capable of lateral articulation when the tongue is not locked in the fixed position; and (1) the length of the top wall of the tongue housing extends beyond the first end of the tongue when the tongue is in the fixed position.
- In the drawings which illustrate specific embodiments of the invention, but which should not be construed as restricting the spirit or scope of the invention in any way:
- FIG. 1 is a perspective view of an embodiment of the hitch of the present invention illustrating its tongue in a retracted, locked position;
- FIG. 2 is a perspective view of the hitch of FIG. 1 illustrating its tongue in an extended, unlocked position;
- FIG. 3 is a perspective view of the tongue of the hitch of FIG. 1;
- FIG. 4 is a bottom perspective view of the tongue housing of the hitch of FIG. 1 illustrating the side walls of the throat in dotted outline;
- FIG. 5 is a partial cross-section view taken along line5-5 of FIG. 1 illustrating the insertion of the lock pin through the apertures in the tongue, tongue housing and lock pin housing;
- FIG. 6 is a partial cross-section view taken along line6-6 of FIG. 3 illustrating the hitch pin in a slightly lowered position as compared to FIG. 3;
- FIGS.7-10 are bottom views illustrating the guided movement of the tongue from an extended, laterally misaligned position to a retracted, aligned and locked position;
- FIG. 11 is a perspective view of a first alternative embodiment of the coupler illustrated in FIG. 3;
- FIG. 12 is a perspective view of a second alternative embodiment of the coupler illustrated in FIG. 3;
- FIG. 13 is a perspective view of a first alternative embodiment of the hitch of FIG. 1;
- FIG. 14 is a perspective view of the hitch of FIG. 1 mounted to a towing vehicle;
- FIG. 15 is a perspective, exploded view of the hitch of FIG. 13 with a ball coupler.
- FIG. 16 is a perspective view of third alternative embodiment of the hitch of the invention;
- FIGS. 17 and 18 are perspective views of prior art “E” type hitches;
- FIG. 19 is a perspective view of the hitch of FIG. 16 mounted to an airport pallet or container carrier;
- FIG. 20 is a perspective view of the hitch of FIG. 16 mounted to an airport freight vehicle;
- FIG. 21 is a bottom view of the hitch of the invention with an alternative embodiment of the bottom wall of the tongue housing and illustrating its tongue in an extended, laterally misaligned position;
- FIG. 22 is a bottom view of the hitch of FIG. 21 illustrating its tongue in a retracted, aligned and locked position;
- FIG. 23 is a perspective view of the hitch of the invention with an alternative embodiment of the tongue housing and illustrating its tongue in an extended position; and
- FIG. 24 is a bottom view of the hitch of FIG. 23 illustrating the tongue in a retracted, aligned and locked position.
- The hitch of the present invention allows the coupling of a towing vehicle to a trailer vehicle and is particularly suited for situations where there is imprecise alignment of the coupling means of the two vehicles. As used herein, the term “towing vehicle” encompasses any vehicle for pulling, towing or otherwise drawing a subsequent vehicle, referred to as a “trailer vehicle”, coupled therewith. For example, a towing vehicle could be a truck, an RV, a car or a tractor vehicle used at airports for pulling freight (i.e. luggage, etc.) carts. The term “trailer vehicle”, on the other hand, encompasses any vehicle which is designed to be pulled, towed or otherwise drawn by a towing vehicle. For example, a towing vehicle could be a boat trailer, an airport freight cart or an airport pallet or container cart. As will be explained later, “towing vehicle” also encompasses a first trailer vehicle which is used to tow a second trailer vehicle in a multiple trailer vehicle train.
- FIG. 1 illustrates a
hitch 10, which includes atongue housing 12 and atongue 14.Tongue housing 12 is adapted for attachment to a rear end of a towing vehicle, such as, for example, a tractor for pulling freight carts at airports. - Turning to FIG. 4 in conjunction with FIG. 1,
tongue housing 12 includes atop wall 16 and abottom wall 18, which are in a substantially parallel relationship and which are spaced apart by a distance at least as great as the thickness oftongue 14. Spaced apartside walls top wall 16 andbottom wall 18. Together,top wall 16,bottom wall 18 andside walls throat 23.Side walls throat 23 has a width greater than the width oftongue 14, thus allowing for lateral articulation oftongue 14. Referring to FIGS. 4, 7 and 8,side walls central portions throat 23 is generally hourglass shaped. Avertical wall 24 substantially encloseshousing 12 at its forward end 12 a.Vertical wall 24 abuts the forward ends of each oftop wall 16,bottom wall 18 andside walls Vertical wall 24 has ahorizontal slot 26 defined therein, which permits the slidable extension and retraction oftongue 14 withintongue housing 12. FIG. 5 illustrates the width ofslot 26 between centralrounded portions side walls slot 26 widens at the forward opening ofthroat 23, as with the illustrated rear opening ofthroat 23 in FIG. 4. - Referring to FIG. 14,
vertical wall 24 may conveniently be welded or fastened (such as by bolting) to avertical surface 25 on the rear end of a towingvehicle 27 to attachtongue housing 12, and ultimately hitch 10, to towingvehicle 27. It will be appreciated by those skilled in the art that the attachment ofhitch 10 viavertical walls tongue housing 12 could alternatively be attached to towingvehicle 27 in any suitable manner, such as for example, by welding or fasteningbottom wall 18 to ahorizontal skirt 29 of a standard vehicle commercial bumper.Hitch 10 can thus be easily retrofitted to existing towing vehicles. - For proper operation of
hitch 10,housing 12 must be attached to towingvehicle 27 so thattongue 14 is capable of extension and retraction without engagingrear wall 25. This may require, for example, attachinghitch 10 so thatslot 26 is slightly below the lower-most edge of the rear end ofrear wall 25. Alternatively, a slot (not shown) could be cut from arear wall 25 of the towing vehicle at a location aligned withslot 26 to accommodate the insertion oftongue 14 therethrough. - Turning to FIG. 3,
tongue 14 has afirst end 28, and asecond end 30.Tongue 14 is extendable, retractable and capable of lateral articulation withinthroat 23. As used herein, the term “extendable” refers to the movement of extendingsecond end 30 oftongue 14 away fromtongue housing 12. For example,tongue 14 is illustrated in an extended position in FIG. 2 relative to the position shown in FIG. 1. The term “retractable”, on the other hand, refers to the movement of retractingsecond end 30 oftongue 14 from an extended position towardstongue housing 12. FIG. 1 illustratestongue 14 in its fully retracted position. -
Tongue 14 includes atrunnion 32, in a location proximal tofirst end 28.Trunnion 32 extends vertically above and below (see FIG. 7 for an illustration of the extension oftrunnion 32 below tongue 14)tongue 14 and has a height greater than the height ofslot 26.Trunnion 32 is thus able to retainfirst end 28 from being fully removed fromhousing 12 upon extension of tongue 14 (see FIG. 7), and simultaneously permitssecond end 30 to articulate laterally, relative tofirst end 28, whentongue 14 is fully extended, so as to allowhitch 10 to couple towingvehicle 27 to an imprecisely aligned trailer vehicle (not shown). -
Tongue 14 has aclevis 36 at itssecond end 30 for coupling to a cooperating coupler (not shown) operatively secured to the trailer vehicle (not shown).Clevis 36 has alower arm 38, anupper arm 40, supported by verticalarm support wall 42, and ahitch pin 44. As illustrated in FIG. 6,hitch pin 44 is insertable through anaperture 46 inupper arm 40 and partially insertable intoaperture 48 inlower arm 38.Clevis 36 further includes arelease member 92, having itsupper end 92 a extending throughaperture 93 above anupper surface 40 a ofupper arm 40, and its lower end 92 b in contact withpin engaging member 94. End 92 b is shaped to a size larger thanaperture 93 so thatrelease member 92 cannot be upwardly withdrawn fromupper arm 40 throughaperture 93. Pin engagingmember 94 has afirst end 94 a and a second end 94 b. First end 94 a is in contact withspring 96 andrelease member 92. Pin engagingmember 94 is disposed inshelves 98 and 100 withinupper arm 40. Pin engagingmember 94 has anaperture 99 intermediate to ends 94 a and 94 b to accommodate the insertion ofhitch pin 44 therethrough. End 94 b ofpin engaging member 94 rests within shelf 100. A lower end ofspring 96 is mounted intosunken portion 98 a ofshelf 98. - In operation,
hitch pin 44 is normally in a raised position, illustrated in FIG. 1, so that it is possible to position a corresponding ring (not shown) of a trailer vehicle (not shown) within clevis 36 (betweenarms 38 and 40) so that coupling can occur with the downward insertion ofhitch pin 44 through the ring.Hitch pin 44 is maintained in its raised position bypin engaging member 94. Specifically, whenpin engaging member 94 is in an angled position, as illustrated in FIG. 6, there is frictional engagement between an inside edge of pin engaging member 94 (surrounding aperture 99) with the shaft ofhitch pin 44 so thathitch pin 44 is maintained in its raised position.Grooves 102 assist in this frictional engagement. When a ring (not shown) is positioned in the clevis betweenarms hitch pin 44 through the ring (not shown) by applying a downward force onhitch pin 44. This downward force will causepin engaging member 94 to move to a substantially horizontal position, against the bias ofspring 96, so that the shaft ofhitch pin 44 frictionally disengagespin engaging member 94, allowing free vertical movement ofhitch pin 44. Oncehitch pin 44 is inserted downwardly through the ring (not shown) and the downward force ceases, the bias ofspring 96 causes pin engaging member to return to its angled position of FIG. 6, again frictionally engaginghitch pin 44 to maintain it in the lowered position. This preventshitch pin 44 from inadvertently lifting so as to de-couple the trailer vehicle's coupling ring (not shown). Again,grooves 102 assist in the frictional engagement. When de-coupling is desired, the operator applies a downward force to theupper end 92 a ofrelease member 92 causingend 94 a ofpin engaging member 94 to move downwardly so thatpin engaging member 94 moves to a substantially horizontal position so that the internal edge of pin engaging member 94 (surrounding aperture 99) frictionally disengageshitch pin 44, allowing vertical upward movement ofhitch pin 44 for de-coupling. - Clevis36 thus allows for the easy and safe coupling and decoupling of a ring or other coupling means on the trailer vehicle. Coupling is achieved in a straightforward motion by the application of downward force on
hitch pin 44. However, clevis 36, and specifically pin engagingmember 94, also increase the safety of the entire operation by locking the ring (not shown) in place, thus minimizing the prospects that inadvertent de-coupling will take place at an inopportune time or place. -
Hitch pin 44 is fitted with asleeve 104 at its lower end, which in combination withflange 106 onupper arm 40, prevents the upward removal ofhitch pin 44 fromclevis 36.Flange 106 extends intoaperture 46 to define a smaller radius thansleeve 104. Thus, vertical sliding ofpin 44 inaperture 46 is possible, but complete removal ofpin 44 is prevented.Flange 108 withinaperture 48 oflower arm 38 acts in a similar manner to preventhitch pin 44 from being lowered to a position belowlower arm 38, where it would be vulnerable to inadvertent contact by extraneous objects. -
Second end 30 oftongue 14 has attached on its underside aguide member 50.Guide member 50 may be welded (or otherwise fastened) tosecond end 30 ortongue 14 may be configured so thatguide member 50 is integral with it. As illustrated in FIG. 7,guide member 50 is “Y-shaped” and comprisesrounded cam members rounded pocket 56, which generally faces towardstongue housing 12. Anaperture 90 is located ontongue 14 in a location intermediate tofirst end 28 andsecond end 30, near topocket 56. - Turning to FIGS. 4 and 7,
bottom wall 18 ofhousing 12 comprises a “W-shaped”guide member 60, which in operation matingly receivesguide member 50 upon retraction oftongue 14 withinhousing 12. To accommodate this mating reception, guidemembers Guide member 60 comprises roundedcentral cam member 62 and adjacentrounded pockets tongue housing 12. Outside edges 68,70 flare outwardly frompockets bottom wall 18 need not necessarily compriseguide member 60. Rather, these could be separate elements wherebybottom wall 18 is identical in shape totop wall 16 and guidemember 60 was attached to the underside of that embodiment of bottom wall 18 (it will be understood that in such an arrangement,guide member 50 would be similarly modified so that it remained coplanar with guide member 60). However,bottom wall 18 and guidemember 60 are described herein as one integral element. - Referring to FIGS. 1 and 5,
lock pin housing 72 is attached on the upper surface oftop wall 16 ofhousing 12.Lock pin housing 72 comprises bevelledside walls top wall 78. The bevelled shape ofside walls Housing 72 houses lockpin 80, which is biased downwardly byspring 83.Spring 83 is coiled around avertical shaft 84 oflock pin 80 and betweentop wall 78 andspring retaining member 82, maintained onshaft 84 bynotch 85, which extends throughshaft 84.Lock pin 80 is insertable throughapertures top wall 78,top wall 16,tongue 14 and bottom wall 18 (see FIG. 5). Whenlock pin 80 is inserted through alignedapertures tongue 14 is “locked” in a fixed axial and lateral position relative totongue housing 12. -
Hitch 10 operates in the following manner. Towingvehicle 27, havinghitch 10 attached to its rear end as described above and illustrated in FIG. 14, is positioned near to the forward end of a trailer vehicle (not shown). At this time,tongue 14 is in its “locked” position of FIG. 1 (i.e.guide members lock pin 80 is inserted throughapertures hitch 10 to the trailer vehicle (not shown),lock pin 80 is lifted upwardly against the bias ofspring 83 and withdrawn fromapertures bottom wall 18 andtongue 14, respectively.Lock pin 80 is not, however, removed fromapertures Tongue 14 is then extended fromthroat 23 and manually positioned so thatclevis 36 can be coupled to a cooperating coupling means (not shown) provided on a trailer vehicle or alternatively on a draw bar (not shown) attached to the forward end of a trailer vehicle (not shown). This “unlocking” and coupling action is achieved in a straight-forward and timely manner, allowinghitch 10 to be used repeatedly and efficiently by an operator over a period of time. This simple, yet reliable action may be particularly advantageous for coupling an airport tractor to a freight cart, which is done repeatedly and continuously by airport employees during the course of a day. -
Tongue 14 is capable of extension untiltrunnion 32 engagesvertical wall 24 immediately surroundingslot 26. This defines the length of the axial extension oftongue 14. Lateral articulation oftongue 14 is possible to couple imprecisely aligned towing and trailer vehicles. Specifically,tongue 14 is free to articulate laterally, subject only to the lateral constraints ofside walls throat 23, as soon aslock pin 80 is raised fromapertures tongue 14 is required for lateral articulation to be possible, thus permitting coupling of misaligned vehicles which are in very close proximity to one another. Whentongue 14 is fully extended,trunnion 32 engagesvertical wall 24 ofhousing 12 as described above and provides a point at whichsecond end 30 oftongue 14 can pivot relative tofirst end 28. This is illustrated byarrow 7 and the phantom outline oftongue 14 and guidemember 50 in FIG. 7. - Whenever
tongue 14 is not in its “locked position” of FIG. 1,lock pin 80 will be downwardly biased byspring 82 so that it rides along thetop surface 14 a oftongue 14. - After
tongue 14 is manually positioned (axially and/or laterally),clevis 36 can then be coupled to cooperating coupling means, such as a ring (not shown). As explained above, this is accomplished by inserting downward force onhitch pin 44 causing it to be inserted through the ring (not shown).Hitch pin 44 can be downwardly inserted from its position in FIG. 1, through a ring member (not shown), until its lower end is at least partially withinaperture 48. Pin engagingmember 94, through the bias ofspring 96, returns to its angled position of FIG. 6, frictionally engaginghitch pin 44 and thus preventing any vertical movement of thehitch pin 44 which would allow the inadvertent de-coupling of the ring member (not shown).Grooves 102 assist in this “locking” ofhitch pin 44. - Once this coupling takes place, the towing
vehicle 27 is advanced in a forward direction. Very shortly thereafter, the brakes of the towingvehicle 27 are applied. As a result of applying the brakes, the forward inertia of the trailer vehicle (not shown) will causetongue 14 to retract from an extended position and slide further intothroat 23. If the towing and trailer vehicles are precisely aligned upon coupling, this retraction takes place in a simple manner untilguide members pin 80 falls throughapertures aperture 90 becomes aligned withapertures - If, however, the towing and trailer vehicles are imprecisely aligned upon coupling, the smooth guided movement of
tongue 14 into its locked position of FIG. 2 is achieved through: (1) the interaction ofguide members cam members tongue 14 withside walls - Turning to FIG. 7,
tongue 14 is illustrated in an extended, laterally misaligned position. The shape ofthroat 23permits tongue 14 to be laterally articulated to a large degree, as illustrated in FIG. 7, though it is possible to modifyhitch 10 so that the articulation range can meet various operational requirements. This wide range of lateral articulation is advantageous because it permitshitch 10 to couple towing and trailer vehicles from misaligned positions that might not be possible with prior art hitches. Additionally, it permits the movement oftongue 14 to its locked position from any number of laterally misaligned positions. - Following coupling to the coupling means on a trailer vehicle (not shown), the forward inertia of the trailer vehicle (achieved as described above) causes
tongue 14 to retract further intothroat 23, as illustrated in FIG. 8. During this retraction, anouter edge 54 a ofcam member 54 engagesoutside edge 70 ofguide member 60. Continued retraction oftongue 14 intothroat 23 pullscam member 54 into engagement withpocket 66 of guide member 60 (see FIG. 9).Guide member 50 then pivots about a rounded front portion 54 b ofcam member 54 and into alignment withguide member 60 as follows.Pocket 56 engagescam member 62 ofguide member 60.Cam member 52 then falls into place, first upon the engagement of itsinner edge 52 c withcam member 62, and second, upon further retraction oftongue 14, by the engagement of a rounded front portion 52 b with roundedpocket 64 ofguide member 60. Whencam members pockets aperture 90 becomes fully aligned withapertures lock pin 80 to be inserted therethrough by the downward bias ofspring 83, thus movinghitch 10 to its “locked” position, illustrated in FIG. 10.Hitch 10 is “locked” in thattongue 14 is fixed, laterally and longitudinally, relative totongue housing 12. As illustrated in FIGS. 7-10,hitch 10 is thus self-aligning in that it operates to facilitate alignment of towing and trailer vehicles. - The progression of
tongue 14 from its position in FIG. 7 to its position in FIG. 10 is achieved not only by the mating engagement ofcoplanar guide members tongue 14 withside walls tongue 14, upon retraction, are slidably engaged by arear edge 20 b ofside wall 20 and afront edge 22 c ofside wall 22. The sliding engagement oftongue 14 within and intothroat 23 helps with the smooth, guided movement oftongue 14 from its most laterally articulated position (FIG. 7) into its locked, aligned and filly retracted position (FIG. 10). It will be appreciated thattongue 14 may be slidably engaged by only one ofside walls - Once
tongue 14 moves into its locked position of FIG. 10, the operator is thus free to move the towing vehicle-trailer vehicle train to its destination. The mating engagement ofguide members arm support wall 42 withtongue housing 12 andlock pin housing 72, causeshitch 10 to have a sturdy construction in its locked position. This sturdy construction minimizes the possibility of damage occurring to hitch 10 upon any inadvertent collisions involving the towing or trailer vehicles whenhitch 10 is in use. - It will be appreciated that the engagement of
guide members cam member 52 ofguide member 50 which first engagespocket 64 ofguide member 60 and then guidemember 50 is pivoted untilcam member 54 engagespocket 66. This would occur, for example, from the laterally misaligned position as shown in phantom outline in FIG. 7. It will also be appreciated thattongue 14 can move from any number of laterally misaligned positions within the lateral articulation range oftongue 14 illustrated in Figure 7 to its locked position, depending upon the positions of the towing and trailer vehicles. - It will also be appreciated that the arrangement of
hitch 10 helps to overcome the previously-discussed problems that prior art hitch assemblies may suffer from. The rounded edges ofcam members tongue 14 withside walls throat 23, allow for the smooth, guided transition oftongue 14 from an extended, misaligned position to its locked position. Because of this arrangement ofhitch 10, it is not necessary to first align the vehicles before applying the brakes, as it is with some prior art hitches. Rather, the arrangement ofhitch 10 allows for the self-alignment oftongue 14 withhousing 12 upon the forward inertia oftongue 14 from any number of laterally misaligned positions. This is advantageous in situations where the operator is faced with limited room to operate, thus limiting the ability to move the towing vehicle-trailer vehicle train into aligned arrangement before locking the hitch. - As will be apparent to those skilled in the art in the light of the foregoing disclosure, many alterations and modifications are possible in the practice of this invention without departing from the spirit or scope thereof. For example, clevis36 could be replaced with a
ring 110 or aball 112, illustrated respectively in FIGS. 11 and 12, or any other suitable means for couplinghitch 10 to a trailer vehicle (not shown). Similarly, hitch 10 could be modified as illustrated in FIG. 13 so that the attachment ofhousing 12 to the towingvehicle 27 could be accomplished by the engagement ofsquare tubing portion 114 with correspondingsquare tubing portion 116, mounted on the underside of a towing vehicle (not shown).Pin 118 is insertable throughapertures 114 a and 116 a onportions portion 114 withinportion 116, thus attachinghitch 10 to the towingvehicle 27. In the embodiment of the hitch illustrated in FIG. 13,square tubing portion 114 would thus replacelock pin housing 72 from the previously discussed embodiment and would be attached totongue housing 12 by means of welding or the like to atop surface 16 a oftop wall 16. FIG. 15 illustrates this embodiment of the hitch in association with a towingvehicle 27. In FIG. 15, clevis 36 has been replaced withball 112. - Similarly, it is within the inventive scope herein to utilize
hitch 10 not only on the rear of towingvehicle 27, but also on the rear of a trailer vehicle (not shown) where more than one trailer vehicle (not shown) will be pulled by the same towing vehicle. In theory, each trailer vehicle in a multiple trailer vehicle train could be fitted on its rear end withhitch 10 for coupling to a following trailing trailer. - Similarly, it is within the inventive scope of the invention to attach
hitch 10 to the front of a trailer vehicle, rather than to a rear surface of towingvehicle 27. In such an embodiment,tongue 14 would thus extend (afterpin 80 is unlocked) away from the trailer vehicle (not shown) and towards towingvehicle 27 for coupling to a coupler attached to the rear of towingvehicle 27. In such an embodiment, it would be guidemember 60 which would matingly engageguide member 50 upon the forward inertia of the trailer vehicle (not shown), rather than the opposite as described above. - Similarly, it would also be possible to modify
hitch 10 for use as an intermediate between vehicles having already-installed coupling means. That is,housing 12 could be fitted with a coupling means (not shown) for coupling to coupling means (not shown) attached to a rear end of a towing vehicle.Clevis 36 could then be used to couple to corresponding coupling means (not shown) at the front of a trailer vehicle (not shown) and the operation ofhitch 10 would remain the same as described above, except thathitch 10 would be releasably coupled to both the towing vehicle and the trailer vehicle. - Similarly, it is within the inventive scope of the invention to modify the length of
tongue 14, if the need arises. - The elements of
hitch 10 are preferably constructed of a durable steel material, though it will be appreciated that this is not required for operation ofhitch 10.Tongue housing 12 andclevis 36 have both been illustrated herein as being of a cast construction. Alternatively, these elements could be constructed of multiple layered, horizontal plates which are fastened (by bolting, welding or any other suitable means) together. - Those skilled in the art will appreciate that the clevis of the invention could be attached directly to a vehicle, apart from
hitch 10 as described, for use in coupling other vehicles. This embodiment of the invention is illustrated in FIG. 16. -
Hitch 120 is comprised ofclevis 136, which is identical in structure and operation to clevis 36 described above and illustrated in FIGS. 1-3, 6, 13 and 14 except that clevisupper arm 140 is illustrated as being constructed fromhorizontal plates 140 a, 140 b and 140 c. Plate 140 a is integral with verticalarm support wall 142.Plates 140 a, 140 b and 140 c are fastened together by any suitable means (such as welding or bolts).Upper arm 140 could also be of a cast construction, as illustrated forupper arm 40 ofclevis 36 in FIG. 6. -
Hitch 120 also compriseswall 146, attached to forward portions ofupper arm 140,lower arm 138 and verticalarm support wall 142.Wall 146 may be conveniently be bolted (throughapertures 148 and 149) to anairport freight vehicle 150, as illustrated in FIG. 20, an airport pallet orcontainer carrier 152, as illustrated in FIG. 19, or to any other towing or trailer vehicle.Wall 146 could alternatively be attached by welding to the towing or trailer vehicle. - FIGS. 17 and 18 illustrate prior art “E” type hitches, which are in common use on airport carts and carriers. Some “E” type hitches, such as
hitch 160 illustrated in FIG. 17, do not include any mechanism to lock the hitch pin in a lowered position, other than the bias of a spring 162 (whennotch 164 is rotated to disengage lockingmember 166, and the hitch pin is lowered). This is disadvantageous since inadvertent de-coupling can occur if the spring malfunctions and the hitch pin rises, allowing the trailer vehicle's coupling means to be released fromhitch 160. Other “E” type hitches, such ashitch 170, illustrated in FIG. 18, include a slottedspring plate 172 that prevents upward or downward movement of the hitch pin from its lowered or raised positions, respectively, unlessslot 174 is aligned with lockingmember 176. The “E” hitch illustrated in FIG. 18 is, however, disadvantageous because the unlocking of the hitch can be difficult when the operator is in a hurry. Slot 174 can easily become misaligned relative to lockingmember 176 so that the operator will be forced to see or manually feel for the alignment ofslot 174 and lockingmember 176, something which may be difficult in dark conditions or inclement weather. Further, “E” type hitches often have a “high” profile so that when used on airport freight vehicles they can interfere with the loading and unloading of the freight vehicles when the hitch pin is inadvertently left in its raised position. -
Hitch 120 overcomes these disadvantages by providing a low profile, easy to manufacture hitch which automatically locks its hitch pin in both its lowered and raised positions, thus increasing the safety of the entire operation.Hitch 120 is also easy and quick to operate. - FIGS. 21 and 22 illustrate a
hitch 210 having an alternative embodiment of the bottom wall described above and illustrated in FIGS. 4 and 7-10. - In contrast to bottom wall18 (of hitch 10),
hitch 210 differs in thatbottom wall 218 includes a roundedpocked 219 and twoedges Rounded pocket 219 faces a direction opposite ofrounded pockets central cam member 262. It will be appreciated by those skilled in the art that the recess inbottom wall 218 formingrounded pocket 219 results in a different shape for the slot (not shown) ofvertical wall 224, as compared to slot 26 defined invertical wall 24 ofhitch 10. - As illustrated in FIG. 21,
first end 228 oftongue 214 is capable of being extended intotongue housing 212 whentongue 214 is fully extended. This differs fromhitch 10 wherefirst end 28 oftongue 14 is not capable of being extended intotongue housing 12 due to the engagement oftrunnion 32 against vertical wall 24 (see FIG. 7). To accommodate this extension forhitch 210,trunnion 232 ontongue 214 extends only vertically belowtongue 214 and does not extend vertically abovetongue 214 astrunnion 32 does abovetongue 14 withhitch 10. As a result,tongue 214 is capable of being extended untiltrunnion 232 engages roundedpocket 219, as illustrated in FIG. 21, thus providing additional extension oftongue 214 in comparison totongue 14 of hitch 10 (see FIG. 7).Tongue 214 is prevented from being removed from the throat ofhitch 210 by the engagement oftrunnion 232 androunded pocket 219.Rounded pocket 219 also provides a pivot point fortongue 214 to articulate from whentongue 214 is fully extended and hitch 210 is used to couple two laterally misaligned vehicles. -
Bottom wall 218 ofhitch 210 does not have an aperture corresponding toaperture 91 inbottom wall 18 ofhitch 10.Rounded pocket 219 is aligned with apertures (not shown) in top wall 216 (corresponding toaperture 88 intop wall 16 of hitch 10) and in the top wall of the lock pin housing (corresponding toaperture 86 intop wall 76 oflock pin housing 72 of hitch 10). A lock pin 280 (corresponding to lockpin 80 of hitch 10) lockstongue 214 into the fully retracted, locked position of FIG. 22 upon the alignment of theaperture 290 in tongue 214 (corresponding toaperture 90 in tongue 14) and the apertures intop wall 216 and the top wall of the lock pin housing (not shown). -
Hitch 210 is otherwise identical to hitch 10 in terms of structure and operation. - FIGS. 23 and 24 illustrate a
hitch 310 having an alternative embodiment of the tongue housing described above and illustrated in FIG. 1.Tongue housing 312 allowshitch 310 to be attached to a towing (or trailer) vehicle without thetongue 314 being inserted through (as in FIG. 14) or underneath the rear surface of the vehicle.Tongue housing 312 has been modified to accommodate the entire retraction range oftongue 314 therein. -
Tongue housing 312 includes atop wall 316, abottom wall 318, two spaced apartside walls vertical wall 324. -
Bottom wall 318, as illustrated in FIG. 24, is configured like bottom wall 218 (in that it includes arounded pocket 319 like rounded pocket 218) except that the outward side edges 318 a and 318 b flare outwardly in a diverging relationship. It will be appreciated thatbottom wall 318 could alternatively be configured similar to bottom wall 18 (i.e. not including a rounded pocket 319), rather thanbottom wall 218. -
Side walls side walls hitch 10 with the similar exception that the outward side edges thereof flare outwardly in a diverging relationship similar tooutside edges 318 a and 318 b ofbottom wall 318. -
Top wall 316 differs fromtop wall 16 in that it extends a length greater than the length oftongue 214, until it attaches to vertically-extendingwall 324. That is,top wall 316 extends beyondfirst end 328 oftongue 314 whentongue 314 is in its locked position, as illustrated in FIG. 24. The outward side edges oftop wall 316 flare away from one another in a diverging relationship likebottom wall 318 andside walls Lower side walls top wall 316 and extend downwardly to the depth ofbottom wall 318.Tongue housing 312 is thus fan-shaped (in thatforward end 312 a oftongue housing 312 is wider than rear end 312 b) and defines an interior cavity betweenside walls tongue 314 from laterally misaligned positions. -
Tongue housing 312 does not include a vertical wall similar tovertical wall 24 as inhitch 10. -
Lock pin housing 372 is not illustrated in FIG. 23 with bevelled side walls (as withhousing 72 of hitch 10), though it will be appreciated that such a modification could readily be made. -
Tongue housing 312 may also include abracket 329 for storage of a chain. -
Tongue housing 312 is attached to a vertical surface of a towing (or trailer) vehicle by attachingvertical wall 324 thereto by welding, or any other suitable fastening means (e.g. bolting, etc.). The full range of motion offirst end 328 oftongue 314 is thus withintongue housing 312 and it is not necessary to inserttongue 314 through or underneath the rear wall of the vehicle. - Otherwise,
hitch 310 is identical in operation to hitch 10 and hitch 210 as described above. - Accordingly, the scope of the invention is to be construed in accordance with the substance defined by the following claims.
Claims (43)
1. A hitch for coupling a first vehicle to a second vehicle, said hitch comprising:
(a) a tongue housing for attaching to said first vehicle, said tongue housing having a forward end and a rear end, said tongue housing comprising a top wall, a bottom wall spaced apart from said top wall by two spaced apart side walls disposed therebetween, said top, bottom and side walls defining a throat, said throat having an open first end and an open second end;
(b) a first guide member attached to said housing, comprising:
(i) a first cam member;
(ii) a first pocket and a second pocket, said first and second pockets being located on either side of said first cam member;
(c) a tongue having a first end and a second end, said tongue being extendable and retractable within said throat, said tongue having a width narrower than the distance between said two spaced apart side walls of said tongue housing;
(d) retaining means for preventing said tongue from being removed from said throat;
(e) a second guide member, coplanar with said first guide member and attached to said second end of said tongue, said second guide member comprising:
(i) a second cam member and a third cam member;
(ii) a third pocket located between said second and third cam members;
(f) a coupler attached to said second end of said tongue;
wherein said first and second guide members become matingly engaged upon retraction of said tongue within said throat and wherein said first and second guide members cooperate to align said tongue with said first and second vehicles by the mating engagement of said first cam member with said third pocket and said second and third cam members with said first and second pockets; and
(g) lock means for locking said tongue in a fixed position relative to said tongue housing upon full engagement of said first and second guide members; and
wherein said tongue is capable of lateral articulation when said tongue is not locked in said fixed position.
2. The hitch of claim 1 wherein said cam members and said pockets are rounded.
3. The hitch of claim 1 wherein said bottom wall is said first guide member.
4. The hitch of claim 1 wherein said side walls are centrally rounded to define a generally hourglass shaped throat between said top and bottom walls.
5. The hitch of claim 1 wherein said top wall of said tongue housing defines a first aperture therethrough and wherein said tongue defines a second aperture therethrough in a location intermediate to said first and second ends of said tongue, said first and second apertures being aligned upon fall engagement of said first and second guide members, and wherein said lock means is a lock pin insertable through said first and second apertures.
6. The hitch of claim 5 wherein said bottom wall defines a third aperture therethrough for insertion of said lock pin, said third aperture being aligned with said first aperture.
7. The hitch of claim 6 further comprising means for biasing said lock pin towards insertion into said first, second and third apertures.
8. The hitch of claim 7 wherein said means for biasing said lock pin towards insertion into first, second and third apertures is a first spring on said lock pin, said first spring mounted between a top wall of a lock pin housing attached to said top wall of said tongue housing and a spring retaining member mounted on an intermediate portion of said lock pin, said top wall of said lock pin housing further comprising a fourth aperture for insertion of said lock pin, said fourth aperture being aligned with said first and third apertures and wherein said second aperture becomes aligned with said first, third and fourth apertures upon fall engagement of said first and second guide members.
9. The hitch of claim 8 wherein said lock pin housing farther comprises opposed, bevelled side walls.
10. The hitch of claim 1 wherein said coupler is selected from the group consisting of a clevis, a ring and a ball.
11. The hitch of claim 1 wherein said coupler is a clevis comprising:
(a) an upper arm, said upper arm defining a first aperture therethrough;
(b) a lower arm, said upper and lower arms being spaced apart by a vertical arm support wall, wherein said upper and lower arms define an opening facing away from said first vehicle for the insertion therein of a coupling means of said second vehicle;
(c) a hitch pin insertable through said first aperture, said hitch pin being movable between a first, raised position and a second, lowered position, said hitch being capable of receiving said coupling means of said second vehicle when said hitch pin is in said first, raised position;
(d) a release member extending above an upper surface of said horizontal upper arm and through a second aperture defined in said upper arm;
(e) a hitch pin engaging member housed between a first shelf and a second shelf within said upper arm, said first shelf and said second shelf being on either side of said first aperture, said hitch pin engaging member defining a third aperture therethrough for accommodating the insertion of said hitch pin, a lower end of said release member contacting a first end of said hitch pin engaging member;
(f) a second spring mounted within said first shelf, said second spring contacting said first end of said hitch pin engaging member, wherein the bias of said second spring maintains said hitch pin engaging member in an angled position to frictionally engage said hitch pin; and
wherein application of downward force upon said release member causes said hitch pin engaging member to move to a substantially horizontal position against the bias of said second spring and frictionally disengage said hitch pin to permit upward vertical movement of said hitch pin within said first and third apertures.
12. The hitch of claim 11 wherein said vertical arm support wall abuts said tongue housing upon full engagement of said first and second guide members.
13. The hitch of claim 11 wherein movement of said hitch pin from said first, raised position to said second, lowered position is achieved through the application of downward force upon said hitch pin and wherein movement of said hitch pin from said second, lowered position to said first, raised position is achieved by lifting said hitch pin after said pin engaging member is frictionally disengaged from said hitch pin through the application of downward force upon said release member, causing said hitch pin engaging member to move to said substantially horizontal position.
14. The hitch of claim 11 wherein said hitch pin further comprises a sleeve at its lower end and wherein said upper arm further comprises a flange extending into said first aperture to define a radius smaller than the radius of said sleeve, so that said hitch pin cannot be fully withdrawn from said first aperture, and wherein said lower arm defines a fourth aperture, said fourth aperture being aligned with said first aperture, and wherein said lower arm further comprises a flange extending into said fourth aperture to define a radius smaller than the radius of said sleeve so that said lower end of said hitch pin cannot extend through said lower arm of said clevis.
15. The hitch of claim 1 firther comprising a first vertical wall substantially enclosing a forward end of said tongue housing and defining a slot therein, said slot having a width of at least the distance between said spaced apart side walls of said tongue housing and having a height of at least the thickness of said tongue.
16. The hitch of claim 15 wherein said retaining means for preventing said tongue from being removed from said throat comprises a trunnion extending through said tongue at a location proximal to said first end of said tongue, said trunnion having a height greater than the height of said slot in said vertical wall.
17. The hitch of claim 16 wherein the length of said top wall extends beyond the first end of said tongue when said tongue is in said fixed position.
18. The hitch of claim 17 wherein said tongue housing further comprises a second vertical wall for attaching said forward end of said tongue housing to said first vehicle, said second vertical wall being attached to and extending substantially perpendicular to said top wall of said tongue housing.
19. The hitch of claim 18 wherein said tongue housing further comprises a third side wall and fourth side wall, said third and fourth side walls attached to and extending downwardly from the two opposite forward side edges of said top wall.
20. The hitch of claim 19 wherein said tongue housing is wider at its forward end than at its rear end.
21. The hitch of claim 1 further comprising a first square tubing portion attached to and extending from said tongue housing towards said first vehicle, said first square tubing portion having means for attaching said first square tubing portion to a cooperating second square tubing portion attached to and extending from said first vehicle.
22. The hitch of claim 2 wherein said second guide member pivots about either of said first pocket or said second pocket upon the retraction of said tongue from a laterally misaligned position.
23. The hitch of claim 1 wherein said bottom wall further comprises a fourth pocket positioned opposite of said first cam member.
24. The hitch of claim 23 wherein said retaining means for preventing said tongue from being removed from said throat comprises a trunnion attached to and extending below said tongue at a location proximal to said first end of said tongue, wherein said trunnion engages said fourth pocket upon full extension of said tongue.
25. The hitch of claim 24 wherein said cam members and said pockets are rounded.
26. The hitch of claim 24 wherein said bottom wall is said first guide member.
27. The hitch of claim 24 wherein said side walls are centrally rounded to define a generally hourglass shaped throat between said top and bottom walls.
28. The hitch of claim 24 wherein said top wall of said tongue housing defines a first aperture therethrough, and wherein said tongue defines a second aperture therethrough in a location intermediate to said first and second ends of said tongue, said first and second apertures being aligned upon full engagement of said first and second guide members, and wherein said lock means is a lock pin insertable through said first and second apertures.
29. The hitch of claim 28 further comprising means for biasing said lock pin towards insertion into said first and second apertures.
30. The hitch of claim 29 wherein said means for biasing said lock pin towards insertion into first and second apertures is a first spring on said lock pin, said first spring mounted between a top wall of a lock pin housing attached to said top wall of said tongue housing and a spring retaining member mounted on an intermediate portion of said lock pin, said top wall of said lock pin housing further comprising a third aperture for insertion of said lock pin, said third aperture being aligned with said first aperture and wherein said second aperture becomes aligned with said first and third apertures upon full engagement of said first and second guide members.
31. The hitch of claim 30 wherein said lock pin housing further comprises opposed, bevelled side walls.
32. The hitch of claim 24 wherein said coupler is selected from the group consisting of a clevis, a ring and a ball.
33. The hitch of claim 24 wherein said coupler is a clevis comprising:
(a) an upper arm, said upper arm defining a first aperture therethrough;
(b) a lower arm, said upper and lower arms being spaced apart by a vertical arm support wall, wherein said upper and lower arms define an opening facing away from said first vehicle for the insertion therein of a coupling means of said second vehicle;
(c) a hitch pin insertable through said first aperture, said hitch pin being movable between a first, raised position and a second, lowered position, said hitch being capable of receiving said coupling means of said second vehicle when said hitch pin is in said first, raised position;
(d) a release member extending above an upper surface of said horizontal upper arm and through a second aperture defined in said upper arm;
(e) a hitch pin engaging member housed between a first shelf and a second shelf within said upper arm, said first shelf and said second shelf being on either side of said first aperture, said hitch pin engaging member defining an third aperture therethrough for accommodating the insertion of said hitch pin, a lower end of said release member contacting a first end of said hitch pin engaging member;
(f) a second spring mounted within said first shelf, said second spring contacting said first end of said hitch pin engaging member, wherein the bias of said second spring maintains said hitch pin engaging member in an angled position to frictionally engage said hitch pin; and
wherein application of downward force upon said release member causes said hitch pin engaging member to move to a substantially horizontal position against the bias of said second spring and frictionally disengage said hitch pin to permit upward vertical movement of said hitch pin within said first and third apertures.
34. The hitch of claim 33 wherein said vertical arm support wall abuts said tongue housing upon full engagement of said first and second guide members.
35. The hitch of claim 33 wherein movement of said hitch pin from said first, raised position to said second, lowered position is achieved through the application of downward force upon said hitch pin and wherein movement of said hitch pin from said second, lowered position to said first, raised position is achieved by lifting said hitch pin after said pin engaging member is frictionally disengaged from said hitch pin through the application of downward force upon said release member, causing said hitch pin engaging member to move to said substantially horizontal position.
36. The hitch of claim 33 wherein said hitch pin further comprises a sleeve at its lower end and wherein said upper arm further comprises a flange extending into said first aperture to define a radius smaller than the radius of said sleeve, so that said hitch pin cannot be fully withdrawn from said first aperture, and wherein said lower arm defines a fourth aperture, said fourth aperture being aligned with said first aperture and said lower arm further comprises a flange extending into said fourth aperture to define a radius smaller than the radius of said sleeve so that said lower end of said hitch pin cannot extend through said lower arm of said clevis.
37. The hitch of claim 24 further comprising a first square tubing portion attached to and extending from said tongue housing towards said first vehicle, said first square tubing portion having means for attaching said first square tubing portion to a cooperating second square tubing portion attached to and extending from said first vehicle.
38. The hitch of claim 24 wherein the length of said top wall extends beyond the first end of said tongue when said tongue is in said fixed position.
39. The hitch of claim 38 wherein said tongue housing further comprises a vertical wall for attaching said forward end of said tongue housing to said first vehicle, said vertical wall being attached to and extending substantially perpendicular to said top wall of said tongue housing.
40. The hitch of claim 39 wherein said tongue housing further comprises a third side wall and fourth side wall, said third and fourth side walls being attached to and extending downwardly from the two opposite forward side edges of said top wall.
41. The hitch of claim 40 wherein said tongue housing is wider at its forward end than at its rear end.
42. A hitch capable of coupling a first vehicle to a laterally misaligned second vehicle, said hitch comprising:
(a) a tongue housing for attaching to said first vehicle, said tongue housing comprising two spaced apart side walls defining a throat;
(b) a first guide member attached to said housing, comprising:
(i) a first cam member;
(ii) a first pocket and a second pocket, said first and second pockets being located on either side of said first cam member;
(c) a tongue having a first end and a second end, said tongue being extendable and retractable within said throat, said tongue having a width narrower than the distance between said two spaced apart side walls of said tongue housing;
(d) a second guide member, coplanar with said first guide member and attached to said second end of said tongue, said second guide member comprising:
(i) a second cam member and a third cam member;
(ii) a third pocket located between said second and third cam members;
(e) a coupler attached to said second end of said tongue; wherein said first and second guide members become matingly engaged in an aligned, locked position upon the fall retraction of said tongue within said throat from a laterally misaligned position; and wherein said tongue is guided from said laterally misaligned position into said aligned, locked position through the combination of:
(i) the mating engagement of said first cam member with said third pocket and said second and third cam members with said first and second pockets; and
(ii) the guided retraction of said tongue along at least one of said side walls of said tongue housing.
43. A hitch for coupling a towing vehicle to a trailer vehicle, said hitch comprising:
(a) a tongue housing for attaching to said towing vehicle, said tongue housing having a forward end and a rear end, said tongue housing comprising a top wall, a bottom wall spaced apart from said top wall by two spaced apart, centrally rounded side walls disposed therebetween and a vertical wall for attaching said forward end of said tongue housing to said towing vehicle, said vertical wall being attached to and extending substantially perpendicular to said top wall of said tongue housing, said top, bottom and side walls defining a throat, said throat having an open first end and an open second end and being generally hourglass shaped, said top wall defining a first aperture therethrough;
(b) a tongue having a first end and a second end, said tongue being extendable and retractable within said throat, said tongue having a width narrower than the distance between said two spaced apart side walls, said tongue defining a second aperture therethrough in a position intermediate to said first and second ends of said tongue;
(c) said bottom wall comprising a first guide member, said first guide member comprising:
(i) a first rounded cam member;
(ii) a first rounded pocket and a second rounded pocket, said first and second pockets being located on either side of said first cam member; and
(iii) a fourth rounded pocket positioned opposite of said first rounded cam member;
(d) a trunnion attached to and extending below said tongue at a location proximal to said first end of said tongue, wherein said trunnion engages said third pocket upon full extension of said tongue;
(e) a second guide member, coplanar with said first guide member and attached to said second end of said tongue, said second guide member comprising:
(i) a second rounded cam member and a third rounded cam member;
(ii) a third rounded pocket located between said second and third cam members;
(f) a coupler attached to said second end of said tongue; wherein said second guide member is matingly received by said first guide member upon retraction of said tongue within said throat and wherein said first and second guide members cooperate to align said tongue with said towing and trailer vehicles by the mating engagement of said first cam member with said third pocket and said second and third cam members with said first and second pockets;
(g) a lock pin housing attached to said top wall of said tongue housing, said lock pin housing comprising a top wall and two opposed side walls, said top wall of said lock pin housing defining a third aperture therethrough, said third aperture being aligned with said first aperture;
(h) a lock pin insertable through said first, second and third apertures;
(i) a spring mounted on said lock pin between said top wall of said lock pin housing and a spring retaining member mounted on an intermediate portion of said lock pin, said spring biasing said lock pin towards insertion into said first, second and third apertures;
wherein:
(j) when said first, second and third apertures become aligned upon full reception of second guide member by said first guide member said lock pin is inserted into said first, second and third apertures to lock said tongue in a fixed position relative to said housing;
(k) said tongue is capable of lateral articulation when said tongue is not locked in said fixed position; and
(l) the length of the top wall of said tongue housing extends beyond the first end of said tongue when said tongue is in said fixed position.
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/726,410 US6328326B1 (en) | 2000-07-07 | 2000-12-01 | Self-aligning hitch |
AU7226901A AU7226901A (en) | 2000-07-07 | 2001-07-06 | Self-aligning hitch |
DE60116320T DE60116320T2 (en) | 2000-07-07 | 2001-07-06 | SELF-ORIENTED TRAILER COUPLING |
CNB2006100935851A CN100425463C (en) | 2000-07-07 | 2001-07-06 | Hitch for connecting two vehicles |
EP01951285A EP1301362B9 (en) | 2000-07-07 | 2001-07-06 | Self-aligning hitch |
PCT/CA2001/001000 WO2002004238A1 (en) | 2000-07-07 | 2001-07-06 | Self-aligning hitch |
CN 01812439 CN1264701C (en) | 2000-07-07 | 2001-07-06 | Self-aligning hitch |
MXPA02012800A MXPA02012800A (en) | 2000-07-07 | 2001-07-06 | Self-aligning hitch. |
AU2001272269A AU2001272269C1 (en) | 2000-07-07 | 2001-07-06 | Self-aligning hitch |
CA2413004A CA2413004E (en) | 2000-07-07 | 2001-07-06 | Self-aligning hitch |
HK03107390A HK1055098A1 (en) | 2000-07-07 | 2003-10-15 | A hitch for coupling two vehicles |
HK07105613.9A HK1099541A1 (en) | 2000-07-07 | 2007-05-29 | Self-aligning hitch |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/612,569 US6286852B1 (en) | 2000-07-07 | 2000-07-07 | Self-aligning hitch |
US09/726,410 US6328326B1 (en) | 2000-07-07 | 2000-12-01 | Self-aligning hitch |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/612,569 Continuation-In-Part US6286852B1 (en) | 2000-07-07 | 2000-07-07 | Self-aligning hitch |
Publications (2)
Publication Number | Publication Date |
---|---|
US6328326B1 US6328326B1 (en) | 2001-12-11 |
US20020003342A1 true US20020003342A1 (en) | 2002-01-10 |
Family
ID=24453724
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/612,569 Expired - Lifetime US6286852B1 (en) | 2000-07-07 | 2000-07-07 | Self-aligning hitch |
US09/726,410 Expired - Lifetime US6328326B1 (en) | 2000-07-07 | 2000-12-01 | Self-aligning hitch |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/612,569 Expired - Lifetime US6286852B1 (en) | 2000-07-07 | 2000-07-07 | Self-aligning hitch |
Country Status (3)
Country | Link |
---|---|
US (2) | US6286852B1 (en) |
CN (1) | CN100425463C (en) |
HK (1) | HK1099541A1 (en) |
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US20080169628A1 (en) * | 2007-01-17 | 2008-07-17 | Kerpash Robert S | Low profile trailer hitch |
US20100213687A1 (en) * | 2009-02-24 | 2010-08-26 | Patrick Kermit Mcdaniel | Trailer hitch assembly |
US7909350B1 (en) * | 2009-04-21 | 2011-03-22 | Landry William M | Method and apparatus for adjustable trailer hitch |
US20110101645A1 (en) * | 2009-11-02 | 2011-05-05 | Williams Jr Thomas M | Teleswivel Hitch Apparatus |
US20110101647A1 (en) * | 2009-11-02 | 2011-05-05 | Williams Jr Thomas M | Towing Apparatus for Vehicles |
US8302987B2 (en) | 2010-11-04 | 2012-11-06 | Williams Innovations, Llc | Adjustable towing apparatus for vehicles |
US8905425B2 (en) | 2010-03-09 | 2014-12-09 | Teleswivel, Llc | Hitch apparatus for vehicles |
US9182038B2 (en) | 2010-01-07 | 2015-11-10 | Panasonic Intellectual Property Management Co., Ltd. | Cooker with steam generating function |
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US7273223B2 (en) * | 2001-07-30 | 2007-09-25 | Master Lock Company Llc | Trailer hitch ball |
US6846002B2 (en) * | 2001-07-30 | 2005-01-25 | Master Lock Company | Hitch ball lock |
US7004488B2 (en) * | 2002-02-12 | 2006-02-28 | New Design Corporation, Inc. | Self-aligning hitch assembly |
US7293791B1 (en) | 2002-07-26 | 2007-11-13 | Williams Jr Thomas M | Telescoping and swiveling hitch assembly |
US6679512B1 (en) * | 2002-09-30 | 2004-01-20 | Dickie M. Plessala | Tractor hitch guide |
US7584984B1 (en) | 2005-05-16 | 2009-09-08 | Williams Innovations, Llc | Telescoping and swiveling hitch assembly |
US7677588B2 (en) * | 2006-10-26 | 2010-03-16 | Deere & Company | Hitch assembly with a guide element |
US7425014B1 (en) * | 2007-08-13 | 2008-09-16 | Van Bradford Palmer | Trailer hitch |
US7850192B2 (en) * | 2008-11-13 | 2010-12-14 | Inventive, Llc | Adjustable hitch for towing |
US20110140393A1 (en) * | 2009-12-14 | 2011-06-16 | Padilla Randy M | Height adjustable articulated tow hitch |
US20120068439A1 (en) * | 2010-09-20 | 2012-03-22 | Roger Fast | Fast Hook-Up Hitch |
US8474852B1 (en) | 2011-08-01 | 2013-07-02 | Matthew David Granados | Trailer hitch |
RU2014124382A (en) * | 2013-08-21 | 2015-12-27 | СиЭнЭйч ИНДАСТРИАЛ АМЕРИКА ЭлЭлСи | CONNECTED ASSEMBLY FOR AGRICULTURAL WEAPONS USING HARDENED PINS |
US10309871B2 (en) * | 2016-09-22 | 2019-06-04 | Ford Global Technologie, Llc | Trailer for measuring operating characteristics of a vehicle |
US10427478B2 (en) * | 2017-06-20 | 2019-10-01 | Robert Coleman | Tow ball adaptor |
US11485003B2 (en) * | 2018-05-23 | 2022-11-01 | Milwaukee Electric Tool Corporation | Powerhead unit for tool |
US11571937B2 (en) * | 2018-08-08 | 2023-02-07 | James Wade | Apparatus and method for an improved trailer hitch |
US11034197B2 (en) | 2018-10-01 | 2021-06-15 | Clyde Machines | Aligning hitch device |
CN112918963B (en) * | 2021-02-05 | 2023-05-05 | 福龙马集团股份有限公司 | Adjustable quick connector fixing seat |
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- 2000-12-01 US US09/726,410 patent/US6328326B1/en not_active Expired - Lifetime
-
2001
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2007
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080169628A1 (en) * | 2007-01-17 | 2008-07-17 | Kerpash Robert S | Low profile trailer hitch |
US7669876B2 (en) * | 2007-01-17 | 2010-03-02 | Kerpash Sr Robert S | Low profile trailer hitch |
US20100213687A1 (en) * | 2009-02-24 | 2010-08-26 | Patrick Kermit Mcdaniel | Trailer hitch assembly |
US7909350B1 (en) * | 2009-04-21 | 2011-03-22 | Landry William M | Method and apparatus for adjustable trailer hitch |
US20110101645A1 (en) * | 2009-11-02 | 2011-05-05 | Williams Jr Thomas M | Teleswivel Hitch Apparatus |
US20110101647A1 (en) * | 2009-11-02 | 2011-05-05 | Williams Jr Thomas M | Towing Apparatus for Vehicles |
US9182038B2 (en) | 2010-01-07 | 2015-11-10 | Panasonic Intellectual Property Management Co., Ltd. | Cooker with steam generating function |
US8905425B2 (en) | 2010-03-09 | 2014-12-09 | Teleswivel, Llc | Hitch apparatus for vehicles |
US8925954B2 (en) | 2010-03-09 | 2015-01-06 | Teleswivel, Llc | Hitch apparatus for vehicles |
US8302987B2 (en) | 2010-11-04 | 2012-11-06 | Williams Innovations, Llc | Adjustable towing apparatus for vehicles |
US8789842B2 (en) | 2010-11-04 | 2014-07-29 | Teleswivel, Llc | Weight distribution hitch apparatus |
Also Published As
Publication number | Publication date |
---|---|
US6286852B1 (en) | 2001-09-11 |
CN100425463C (en) | 2008-10-15 |
HK1099541A1 (en) | 2007-08-17 |
CN1868775A (en) | 2006-11-29 |
US6328326B1 (en) | 2001-12-11 |
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