Abstract: An urban delivery motor vehicle, provided with a front towing unit having a vertical front-rear symmetry tiable to a towed unit, and comprising a central part forming a driver-passenger cockpit substantially symmetrical about a substantially vertical axis and having a rear part provided with a space located below the cockpit and opened on its sides and on its rear part; two front wheels and at least one rear wheel located within the space and coplanar with the vertical front-rear symmetry of the towing unit, and an attachment located close to the vertical axis for receiving a complementary attachment of the towed unit to link it thereto.

Abstract: A towing head assembly, designed to be mounted on a tow bar of a towing vehicle, which is structured to innerconnect the towing vehicle to a tow pin of the type normally found on aircraft landing gear. A connecting structure includes a rotatable cam selectively positionable into a clamping or locking position defined by camming engagement of a cam structure with the tow pin of the aircraft forcing it to be clamped between a remainder of the mounting structure such as one or more hook members. The cam structure includes an adjusting feature which adjustably forces a portion thereof into camming engagement with the tow pin so as to overcome wear of the tow pin and ensure a firm, clamping engagement therewith.

Abstract: A trailer coupling including an intermediate unit to be inserted between a standard-type connecting coupling and a trailing vehicle and having integrated therein a force measuring cell for determining vertical forces. Furthermore, horizontal pushing and pulling forces may be determined by integrating at least one force measuring cell acting in horizontal direction. The fifth wheel coupling of semi-trailers may have integrated force measuring cells measuring forces acting in vertical, longitudinal, horizontal and/or lateral horizontal directions.

Abstract: A trailer hitch including a pin that extends axially from a pivotal mounting by a universal joint of a rocking or tilting platform of a trailer draw or towbar. The pin is preferably cylindrical and is grooved circumferentially for fitting into a wide head end of a keyhole or keyway slot formed in a mounting plate attached to a truck bed. The keyway forward circular end includes a flange therearound that fits into the cylindrical pin groove, prohibiting the pin from lifting from the keyway. To complete the locking of the pin to mounting plate, either the pin includes a plug for extending axially into a hole formed in the mounting plate in the center of the keyway forward end, or a brace plate is installed in a keyway large rearward end, resting against the pin prohibiting the pin for being slid therefrom. Which plug is extended or withdrawn by turning a locking or camming rod journaled across the pin, which locking or camming rod is spring biased to a plug extended attitude.

Abstract: A vehicle dual function tow hook bent from one length of steel bar stock into a generally P-shaped member so as to be available for either a tie-down line, a towing line, or a tow bar. The tow hook comprises upper and lower longitudinally extending rod-stem portions having their aft ends terminating in upper and lower eyelet portions separated by a gap for receiving a substructure flange of the vehicle therein. With the eyelet portion central openings aligned with an aperture in a flange a single fastener secures the tow hook on the flange. The upper rod-stem portion has a length at least twice the length of the lower rod-stem portion while the lower rod-stem portion forward end terminates in a bend portion joined to a downwardly sloped rod-angled portion. The forward ends of the upper rod-stem portion and the rod-angled portion are joined by an open loop portion available for a towing or tie-down line.

Abstract: An improved trailer hitch assembly to be attached to a drawbar for towing a trailer, the assembly including an upright elongated hitch post threaded at the lower end by which it is attached to a drawbar, the upper end being of cylindrical external configuration and the post having a central passageway therein communicating with the bottom end, a grease fitting threadably received in an opening in the bottom end communicating with the passageway and the upper end of the passageway communicating with the external cylinder surface, and a ball having an opening therethrough rotatably received on the hitch post and a keeper ring secured to the upper end of the hitch post to retain the ball in position, grease being deposited from the grease fitting through the passageway to lubricate the cylindrical surface between the hitch post and the ball.

Abstract: A trailer coupling which receives the annular eye of a drawbar over a rearwardly and upwardly-projecting pintle, has a latch which engages the pintle and overlies the drawbar to prevent the drawbar from becoming dislodged during use. The latch is rotatable forwardly toward the body of the hitch, which is attached to the towing vehicle, to uncover the drawbar and permit its installation onto and removal from the pintle. A pawl mounted on the body of the coupling engages a tang on the latch when the latch is in its latched position to prevent rotation of the latch to its unlatched position. Thus the latch cannot inadvertently open during use. The pawl can be rotated away from the latch when it is desired to install or remove the drawbar.

Abstract: An improved trailer hitch is disclosed for coupling a towing vehicle and a trailer. The invention is suitable for accommodating both ball and socket-type couplings and ring and pintle-type couplings. The integral body of the trailer hitch has the known elements of a rear mount for attaching the body to a towing vehicle, a ball housing with a bore for mounting a removable ball stud, a plate for mating with the attachment means of a towed vehicle, and a passage for connecting a latching arm. The improvement comprises four elements. First, the latching arm has a head, having a front face and a rear face, and a pair of substantially parallel legs integrally attached to opposite sides of the head and extending beyond the faces of the head. Each leg has an aperture for mating with the passage of the integral body and engaging a pin. Second, to prevent rotation of the latching arm, a notch on the integral body seats the rear face of the latching arm.

Abstract: A pintle hook type tractor-trailer coupling component for heavy duty use. Multiple detent and safety hook means are provided for maintaining it securely, but releasably, in its operative position, coupled to the eye component of a pulling truck or tractor. Automatic take-up means assure a snug fit between the hook and the eye, irrespective of wear.

Abstract: A trolley transfer unit for a tunnel furnace is to be used between trolleys when ceramic sintered products are loaded onto and unloaded from the trolleys in sintering the products in the tunnel furnace. The trolley transfer unit comprises a bar member for connecting the two trolleys with a predetermined interval, protrusions provided at both ends of the bar member for engaging the trolleys to be connected, and a support bar secured to the bar member and engaging a frame of the other trolley to support the bar member.

Abstract: An improved hitch pin assembly for releasably connecting a towed vehicle to a towing vehicle is disclosed. The hitch pin assembly includes a shaft and a generally C-shaped retaining arm, one end of which is pivotally supported at the top of the shaft for rotation between a first position in which it locks the pin in place in service and a second position in which it does not interfere with the removal of the pin. A magnet is positioned on the pin to retain the arm in the first position under most service conditions. The other end of the C-shaped arm includes a foot portion or guide bars to restrict that end from lateral movement relative to the shaft.

Abstract: A trailer hitch ball assembly includes a vertical post for attachment to a vehicle drawbar. The post has a smooth cylindrical upper portion and a circumferential retainer groove for receiving and retaining a ball while permitting rotation of the ball. The ball includes a central bore which receives the post upper portion and a retainer screw for engaging the retainer groove. A threaded lower portion and two nuts are utilized to secure the post on the drawbar. The threaded portion may include an exposed free portion for storing a replacement ball of the same or different diameter.

Abstract: In a cargo-carrying vehicle having a power unit, a first cargo-carrying unit releasably affixed to the power unit, the first cargo-carrying unit not being pivotal on the power unit, and a second cargo-carrying unit releasably and pivotally connected to the first cargo-carrying unit, wherein the improvement comprises:a drawbar affixed to said cargo-carrying unit;an eye affixed to a free end of said drawbar;a safety hook connected to said drawbar;a chassis affixed to said first cargo-carrying unit;a ring affixed to said chassis and adapted to receive said safety hook; anda coupler affixed to said chassis and adapted to engage said eye.

Abstract: An improved trailer hitch is disclosed for coupling a towing vehicle and a trailer. The invention is suitable for accommodating both ball and socket-type couplings and ring and pintle-type couplings. The integral body of the trailer hitch has the known elements of a rear mount for attaching the body to a towing vehicle, a ball housing with a bore for mounting a removable ball stud, a plate for mating with a towed vehicle, and a passge for connecting a latching arm. The improvement comprises four elements. First, the latching arm has a head, having a front face and a rear face, and a pair of substantially parallel legs integrally attached to opposite sides of the head and extending beyond the faces of the head. Each leg has an aperture for mating with the passage of the integral body and engaging a pin. Second, to prevent rotation of the latching arm, a notch on the integral body seats the rear face of the latching arm.

Abstract: In a cargo-carrying vehicle having a power unit, a first cargo-carrying unit releasably affixed to the power unit, the first cargo-carrying unit not being pivotal on the power unit, and a second cargo-carrying unit releasably and pivotally connected to the first cargo-carrying unit, wherein the improvement comprises:a plurality of cross members extending across the width of the second cargo-carrying unit;a tie plate located on each lateral edge portion of the second cargo-carrying unit, said cross members being rigidly affixed between said tie plates; anda drawbar rigidly affixed to said cross members.

Abstract: A trailer hitch for connecting a trailer to a hitch ball on a towing vehicle. There are two converging sides arranged as a V which has an apex at the hitch ball receiving area. A top plate covers extends over most of the sides. There are a pair of holes in the sides which extend through the hitch ball receiving compartment. A pin with pin lock lever extends through the holes for securing the hitch ball in place.

Abstract: A coupler for a pickup drawbar has a removable stud mounted to the end of the drawbar for engaging an implement hitch. A main bracket is mounted to the drawbar between the stud and the work vehicle. A top strap is pivotally mounted in the main bracket and is pivotal between a position engaging the top of the stud and a position removed therefrom to allow the implement hitch access to and from the stud. The top strap is lockable in its closed position engaging the stud and preferably also in its fully open position laying back against the drawbar. The coupler is readily modifiable for use with various implement hitches simply by replacing the stud and top strap.

Abstract: A ball hitch for towing trailers and the like may be assembled in either of two possible configurations so that the resultant assembled ball structure has a selected diameter complemental to the socket of the trailer tongue. The hitch includes an integral body presenting two end portions having a truncated spherical configuration, and a specially adapted bolt may be inserted in either of two directions in a central bore of the body so that the selected end portion of the latter may be located in an outermost disposition for use. Preferably, a smoothly rounded head of the bolt has a radius of curvature equal to the average of the radii of the end portions of the body so that the bolt head and the selected end portion of the body, when the hitch is installed in the vehicle, cooperate to present a rounded structure of a generally spherical configuration.

Abstract: A novel latch mechanism for a trailer hitch assembly used to interconnect a towing vehicle to a drawn vehicle. The hitch assembly includes a frame, mounted on the towing vehicle, having an upwardly extending pintle and a cavity disposed adjacent the pintle for receiving the coupling element of the drawn vehicle; a spring-biased, pivotally-mounted latch extending over the frame cavity, having a notch and a ledge disposed adjacent its forward end; and a spring-biased, pivotally-mounted pawl, generally overlying the latch, having a cam disposed adjacent its forward end and its rear end adjacent and in seated relation in the notch of the latch.

Abstract: A semi-trailer and its releasable coupler for use in rail transportation of intermodal containers and other adaptable cargo. That capability is met by structuring a centered longitudinal beam to the cargo deck and fitting it with the releasable coupler of this invention, permitting the trailer to be one of an infinite number of like trailers joined end to end as a train, the flexibility and longitudinal strength gained through the beam/coupler assembly. Ease of releasing and engaging a trailer from or to the train is made practical by this coupler and the front end supports, the latter having ability to raise and lower the front section of the trailer and separating the coupler segments.

Abstract: The so-called spinner hitch is a centrally apertured quadrangle member adapted to be pivotally secured between spaced mounting frame members by a rod projecting through apertures in the frame members and through the central aperture through the quadrangle member. The quadrangle member has four spaced angularly related platforms to receive thrust transmitting balls of different sizes, or spaced apertured members to receive therebetween thrust transmitting clevises. The mounting frame members have locking blocks secured to their inside surfaces to engage the horizontal and vertical surfaces of the quadrangle member that is spaced oppositely from the thrust transmitting platform that is transmitting the load to restrain the quadrangle member from shifting angularly as forward or reverse thrust is exerted on the torque transmitting member by the pulling vehicle.

Abstract: The locking mechanism of the present invention is comprised of a pawl which is rotatable to a locking position, where it contacts the latch which covers the pintle that carries the trailer drawbar. The pawl has a central cavity which contains a pair of rotatably mounted prongs that normally extend outwardly from the sides of the pawl but which can be placed into the cavity when manually deflected. When the pawl is in its locking position, against the latch, the prongs extend into notches in the side walls of the body of the coupling and thereby prevent the pawl from being lifted off of the latch. A cam, which is rotatably mounted on the bolt which journals the pawl, has paired plates which fit behind the prongs and prevent them from being deflected into the cavity. Thus, before the prongs can be deflected and thereafter the pawl lifted to unlock the latch, the cam must be rotated to a position where its faces are moved away from the prongs.

Abstract: A bicycle trailer hitch which attaches to the bicycle between the chain stay and the seat stay at the crotch formed at the convergence of the two stays, the method of attachment being by three attaching members affixed to and extending inward from a main hitch member to which the bicycle trailer is connected. The three attaching members include a cone-plate member, wherein the intersection of a cone and a plate form a notch which engages the crotch between the two stays; a fixed finger located beneath the chain stay, and a movable finger located above the seat stay. Movement of the movable finger towards the seat stay is accomplished a pivoting member and a threaded tightening member, each attached pivotally at one end to the main hitch member, wherein the non-attached, threaded end of the tightening member passes through an aperture in the pivoting member so that rotation of a threaded knob engaged to the tightening member past the pivoting member will cause the knob to press against the pivoting member.

Abstract: A mounting for the draw rod of the coupling body of a trailer coupling is proposed. The draw rod passes through a cross-piece bore of a cross-piece fast with the towing vehicle. The cross-section of the draw rod at the passage through the cross-piece bore corresponds to the cross-section of the cross-piece bore. A bearing tube secured to the cross-piece for the guidance of the draw rod extends from the cross-piece only in the direction pointing away from the coupling body. Between the end of the draw rod remote from the cross-piece and the end of the bearing tube remote from the cross-piece a support acting in both force directions is provided, that is to say a support for traction force transmission and a support for thrust force transmission. In the solution according to the invention the cross-section of the draw rod can be enlarged compared with conventional forms of embodiment.

Abstract: A trailer hitch is disclosed for providing coupling about three independent axes between a towing vehicle and a trailer. The hitch includes a first U-shaped yoke member having a base plate adapted for attachment to the towing vehicle and having a pair of spaced-apart arms receiving and supporting a first hinge pin extending along a horizontal, transverse axis. A second U-shaped yoke member having a pair of spaced-apart arms supports a second hinge pin about a vertical axis. The first and second U-shaped yoke members are intercoupled by first and second hollow cylindrical sections joined together in the form of a cross, the first hollow cylindrical section being supported upon the first hinge pin and the second cylindrical section being supported upon the second hinge pin to form a universal coupling.

Abstract: The drawbar device of this invention illustrates two structures, both substantially similar, and providing a beam member that is removably mounted in a slide guide and retaining bracket. This device may use an I-beam or a tubular steel member. Each beam is provided with divergent arms, with ear portions adapted to be secured, as by pins, to a retainer plate secured to the frame of a dump truck. A front plate on the beam has an adjustably-secured trailer hitch hook by which a trailer may be attached for towing. The retaining bracket is also fixedly secured to the frame of the dump truck.

Abstract: Mechanism for attaching a military mine roller to the front end of a miliy tank. Latch structures of simplified design are utilized to minimize the adverse effects of manufacturing tolerances on latch structure performance. Each latch structure includes an arcuate curved surface partially encircling a pin means carried by the mine roller, whereby the pin means is firmly retained against escape from the latch structure.

Abstract: A safety hitch pin having an enlarged upper end or head that is adapted to rest upon apertured parts secured by the pin. An annular retention device or keeper adapted to receive the lower end of the pin therethrough is provided that has a retainer chain attached. The free end of the chain and enlarged upper end of the pin are provided with parts that are adapted to coact so that a selected portion of the chain can be releasably secured to the upper end or head portion of the hitch pin.

Abstract: An elongated trailer tongue having a forward end equipped with tow hitch structure is provided and an elongated handle is supported from the tongue rearward of the tow hitch structure in at least slightly elevated position relative to the tongue. The handle is mounted from the tongue for angular displacement about a vertical axis generally centered transversely of the tongue and the handle and also disposed centrally intermediate the opposite ends of the handle. The handle is angularly displaceable relative to the tongue between two positions with the handle generally paralleling the tongue in the first position thereof and disposed transverse to the tongue in the second position thereof.

Abstract: A bracket is described which is adapted to be detachably mounted to the rear crossmember of the frame of a truck tractor. The bracket includes a horizontal base member, first and second depending legs, and securement means which is adapted to secure the bracket to the rear crossmember. A pintle hook is secured to the second leg member.

Abstract: A drawbar pickup system includes a drawbar in the form of a shaft rotatably coupled between aft ends of a pair of draft links, and a latch fixed to the shaft to define an aperture therebetween. A hook is fixed to an implement tongue so that it opens towards the drawbar. The drawbar is rotatable to a position wherein the hook can be inserted into and removed from the aperture and to a position wherein the latch member engages the bight portion of the hook to prevent separation of the hook from the drawbar. A locking mechanism is operable to rotate the drawbar and to releasably hold the drawbar in its positions.

Abstract: A powered vacuum is mounted between a tractor carrying a rotary mower and a trailer carrying a receptacle for moving material from the mower discharge to the receptacle. A mounting frame carries a blower which may include either an internal combustion engine or gearbox and a fan coupled directly to the engine or gearbox. The mounting frame is mounted to the tractor by connections defining three coplanar ball joints located to permit relative pitch and roll between the tractor and trailer. The mounting frame is easily releasably secured to the tongue of the trailer. The mounting frame is articulated between its opposite ends for movement about a tight vertical axis. The mounting frame, in one form, defines a receptacle for receiving a support member of a wheeled dolly for supporting the powered vacuum when the mounting frame is disconnected from the tractor and trailer, and in another form includes retractable wheels which may be selectively placed in an operative condition for supporting the vacuum.

Abstract: A trailer hitch adapted for attachment to a lunette coupler or a ball coupler comprises a pintle hook and a ball mounted on the hook and adapted to receive a ball coupler, and a closure pivotally mounted on the hook and pivotable between a closed position in engagement with the ball and an open position spaced from the ball.

Abstract: An adapter for existing tow bars or spotting dollies to tow aircraft having on-conventional landing gears has a vertical member which is dimensioned to fit into a socket mounted in the bottom of the aircraft in the vicinity of the nose or tail. A structural cross member, integral with the bottom of the vertical member, has holes in the ends which receive the axle pins located at the ends of the tow bar arms or the lifting arms of the spotting dolly.

Abstract: This motorcycle towing device comprises a towing unit body adapted to be fastened detachably or permanently to the front fork of a motorcycle to be towed, a hitching member retained by a spring-loaded bolt responsive to a traction cable connected to a control lever, for example the clutch control lever.

Abstract: In the case of the adjustable upper link in a three-point suspension device for a tractor, comprising a locking device in the form of a line fitted with a shut-off device and connecting together the two end-faces of the hydraulic cylinder, the invention simplifies the operation of the device in that it may be adjusted effortlessly from the tractor-seat. This is achieved in that the shut-off device is in the form of a ball-valve having an axis secured to a forked actuating lever, and in that springs are provided to urge the said actuating lever towards the shut-off position. A scale provides the tractor-driver with an accurate indication of the setting of the link. The design of a tube accommodating one end of the piston-rod as a compressed-air chamber ensures automatic displacement of the piston in the hydraulic cylinder.

Abstract: A safety trailer hitch for mounting on the bumper of a vehicle or the like. The hitch characterized by having a mounting bracket with a hook base and a "J" shaped hook extending outwardly and upwardly therefrom. The hook adapted for receiving the end of a tongue of a trailer therearound. The top of the "J" shaped hook having a threaded end portion for receiving a threaded bolt thereon to prevent the tongue from being disengaged from the hitch when the hitch is used for pulling a trailer therebehind.

Abstract: A hitch for mounting on the back of a vehicle for towing a trailer or other equipment. A ball is mounted on the extended end of a hook portion of the main hitch body and is adapted to receive either a lunette or hooded-type coupler thereon. A closure latch is pivotally mounted on a rear portion of the hitch body and is engageable with the ball when securing a lunette coupler on the hitch and is alternately engageable with the hood of a hooded coupler when securing such a coupler on the ball. A spring-biased first locking pawl is pivotally mounted on the closure latch and is clamped against a shoulder on the hitch body by a spring to lock the latch in closed position with a hooded coupler. A second locking pawl is pivotally mounted on the first locking pawl and is clamped against the shoulder by the spring to lock the closure latch in engaged position with the hitch ball when securing a lunette coupler thereon.

Abstract: An improved head assembly for a towing device for use in connecting to an aircraft to tow the same, said assembly including a body having a central operating opening therethrough and a communicating downwardly opening recess for hooked-up engagement with the towing bracket of an aircraft and wherein a cam is swingably carried in the operating chamber with a portion adapted for rotation into and out of closing relation of the downwardly facing recess to captivate a towing bracket of an aircraft.

Abstract: A tow bar coupling head removably attachable to the cross pin of an aircraft nose wheel strut has a solid metal body portion with a transverse slot in its underside within which the cross pin is received. A positive deadbolt slide lock retains the cross pin in place. A removable locking pin extending vertically through the body portion prevents accidental withdrawal of the deadbolt slide lock.

Abstract: A hitch pin assembly for connecting a hitch of a towing vehicle (e.g. an agricultural tractor) with a tongue of a towed vehicle (e.g. an agricultural implement) includes a coupling pin having a pinhead and handle at its upper end. The coupling pin is inserted through the hitch and tongue, and is held in place by a collar, which is connected to the lower end of the coupling pin. The collar and the pin are locked together by a locking mechanism which includes a pair of L shaped channels at the lower end of the coupling pin, a pair of locking pins carried by the collar which cooperate with the channels, and a bias spring carried on the collar. The bias spring provides an axial bias force which holds the locking pins in locking seat portions of the channels during normal use.

Abstract: A load rod for vehicles, especially motor vehicles, which rod is constructed so as to be a tow rod, an impact rod, a mounting rod, or similar rod. The load rod includes a loop portion as well as force distributing legs that diverge from the loop portion and extend at a distance from each other. The force distributing legs are provided with a mounting section for enabling a mounting of the force distribution legs at portions of a body of the motor vehicle that have greater rigidity. The mounting sections are joined to the body portion of the motor vehicle by a welding. The load rod, formed as a connecting rod, includes at least two individual shaped rods having a predetermined cross section. The individual shaped rods are, within a connecting level, placed against each other with their rod loop portions and are welded together, while the individual force distributing legs diverge outwardly in a direction from both sides of the connecting level.

Abstract: To prevent personal injury and property damage by accidental displacement of a hitch tow-pin, an easily mountable unit has an arm horizontally swingable to and from a position above the upper end of the conventional tow-pin of a clevis-type hitch. The pivot pin for the swingable arm can also serve as part of the unit's mounting structure by extending through a bore in, and anchored to, a draw bar. Or the pivot pin can be fixed to a sleeve slidable over a draw bar. Each species employs a detent device to prevent accidental arm movement away from its draw-pin-retaining position.

Abstract: An adaptor assembly for converting a pintle hook hitch to a ball-and-socket type is disclosed. The assembly comprises a cylindrical bar of sufficient length that is closely received through the eyelet of the pintle hook hitch and a base plate which is affixed along the length of the bar and extends directly therefrom. The base plate includes a first aperture centrally located to accommodate the hook and closure members of the pintle hook and a second aperture spaced near the rear of the base plate to receive the ball member of a ball-and-socket hitch. Threaded bolts are placed through each end section of the bar and are directly threaded through the rear mounting of a towing vehicle to which the pintle hook hitch is mounted.

Abstract: A towbar assembly wherein two individual towbars are arranged in a V-configuration between a towing vehicle and a towed vehicle. The leading ends of the towbars have special end connectors that hook around a single towing pintle so that each towbar carries approximately the same tensile loading irrespective of changes in vehicle pitch or roll attitude. Each towbar is essentially independent of the other towbar, whereby the towbar loadings are essentially in the direction of the bar longitudinal axis; bending forces are to a great extent eliminated. The invention is designed primarily for use in towing large heavy vehicles weighing in excess of fifty tons.

Abstract: An automatic hitch mechanism that permits a tractor driver to connect and disconnect an implement without leaving the cab of the tractor. The hitch includes a tractor drawbar equipped with a power-driven slide member, hook member, and power coupling assembly all interconnected for coordinated movement so that during a hitching operation the hook member first swings into operative engagement with the latch ring of an implement and then, in a continuous sequence of automatic steps, the hook member is locked in its operative position, the power coupling assemblies of the tractor and implement are joined together, the jack supporting the implement tongue is retracted, and one of the coupling assemblies is de-stabilized so that thereafter the tractor and implement may execute turns and traverse uneven terrain without damaging or disengaging the coupling assemblies. Automatic unhitching of the tractor and implement involves a reversal in the direction and order of such steps.

Abstract: A coupling hook assembly having a hook body defining an enclosed hook pocket with a locking bolt extending from a first aperture in the hook body into operative engagement with a hook jaw to lock and unlock an implement pin for joining a trailer with an agricultural tractor. The locking bolt is pivotally connected with an operating lever mounted on a fixed pivot within the hook body and extending through a second aperture therein. A yoke pivotally mounted on the operating lever is adapted to engage with a notch formed on the external surface of the hook body to secure the locking bolt in the locked position or into engagement with a recess in a part of the operating lever to secure the coupling hook assembly in the unlocked position.

Abstract: Towing attachments for attaching trailers to the end of various vehicles are disclosed, including a tubular sleeve attached to the vehicle, an extension bar having one end rotatably attached to the tow bar of the trailer while the other end is adapted to be releasably attached to the tubular sleeve and having a cross-sectional shape which is complementary to that of the tubular sleeve so that it may slide smoothly into same for attachment thereto, and a clamp for releasably clamping the end of the extension bar to the tubular sleeve, the clamp including a fixed trunnion extending from the tubular sleeve and a resilient clamp affixed to the extension bar so that the resilient clamp can be releasably clamped to the fixed trunnion when the extension bar slides into the tubular sleeve, the resilient clamp being pivotable between a first position in which it does not interfere with the sliding of the extension bar into the tubular sleeve and a second position in which it prevents the extension bar from being slida

Abstract: A reversible push block-rear bumper assembly for attachment to a motor vehicle is provided in which a support unit having a forwardly inclined downwardly extending surface is secured to the underside of a vehicle in close proximity to the rear end of the vehicle. A block unit having an upper incline surface which can be mated with the forwardly incline downwardly extending surface of the support unit is also provided, such surfaces being adapted so that when the block unit and support unit are secured together, the block unit will either extend downwardly from the support unit in a plane substantially perpendicular to the longitudinal plane of the vehicle and thus function as a bumper or, upon rotating the block unit 180.degree. into a reverse position, the block unit will extend outwardly from the rear end portion of the vehicle for use as a push block. An extension unit for modifying the length as well, as the angular relationship of the block unit to the support means, is also provided.

Abstract: A device is provided for releasably securing a parked vehicle to an adjacent structure. The device is provided with a first member hingedly mounted for movement between an operative mode and an inoperative mode. When the first member is in an operative mode the distal end thereof will releasably engage a portion of the parked vehicle and retain same in a desired position relative to the adjacent structure. When the first member is in an inoperative mode, it assumes a vehicle-release position. The first member is provided with means for moving same from the inoperative mode to the operative mode. A further means is provided for automatically locking the first member in an operative mode. The further means includes a means for effecting controlled unlocking of the first member whereby the latter will automatically return to its inoperative mode.