Abstract: A spring nut assembly is inserted within the internal cavity of a shank tube until the nut is aligned with opposing side holes in the side walls of the shank tube. The spring maintains the nut in alignment with the opposing side walls. A hitch pin including a threaded portion for engaging the spring nut assembly is inserted through the side holes of the receiver tube and the shank tube until the threaded portion of the hitch pin engages the nut mounted within the shank tube. The hitch pin is then rotated relative to the nut to clamp the shank tube against the receiver tube. A lock or clip can be attached to the end of the hitch pin to prevent accidental or unauthorized removal of the hitch pin from the receiver assembly. A bushing can also be used over the reduced diameter portion of the hitch pin after it engages the nut.

Abstract: The hitch attachment has a base plate with a toe-heel receiver for the attachment carrier of a front end loader on one face side and a hydraulically operable hitch on the other face side. The hydraulically operable hitch has a draw bar extending out from the base plate with a hitching opening at its outer end. A boom mounted to the upper edge of the base plate projects angularly upward to an elevated location above the hitch opening of the draw bar, and a hydraulic ram assembly equipped with a hitching pin is removably suspended from the outer end of the boom. A mid-level assembly has a circumscribing bracing structure that holds the hydraulic ram assembly in stable condition for the entry of the hitching pin into the hitching opening of the draw bar. A removable link in the circumscribing bracing structure facilitates easy removal of the hydraulic ram assembly for replacement.

Abstract: A towing device for selectively locking a towing load has a support member that pivotably supports a link member at a first pivotal point near the first proximal end. A stopper is located on the support member for regulating a pivotal movement of the link member. A joint member is pivotably coupled to the link member near the first proximal end at a second pivotal point and has a tendency to pivot about the second pivotal point toward the first pivotal point to contact the stopper as the first proximal end pivots toward the stopper about the first pivotal point. A coupling member is connected to the second distal end of the joint member. An interference avoiding unit is located near the joint member for guiding the joint member to maintain a certain distance from the stopper as the link member pivots about the first pivotal point.

Abstract: An apparatus and method directed to a stowaway pintle hitch that is simple to manufacture and use having novel height adjustment means, retainer, retainer lock, and stowaway pivoting motion. The apparatus may have a swiveling mount that is free to swivel while towing a trailer. A cushioning spacer is disclosed for reducing impact forces and noise in pintle hitch towing systems. In certain embodiments an apparatus in accordance with the invention may have a trunnion for insertion into a receiver tube or cavity of a vehicle. A base may be secured to the trunnion or to the vehicle. The base may also have a mount secured thereto. The mount may have a platform that is sized and positioned to receive a hitch. The mount may also have a retainer that may be moved into position and locked in order to prevent removal of a pintle ring from around the hitch. The retainer may be mounted on a pivot allowing it to rotate into and out of position.

Abstract: A modular, bolt-in, rack and pinion assembly for replacing an existing steering gear box in a motor vehicle. A rack tube, including a pair of elongated slots in its sidewall, houses the rack. The rack tube is mounted to existing holes in the frame of the motor vehicle by means of a plurality of brackets. The rack has a tooth portion and a shaft portion. A pair of studs projects transversely from the shaft portion of the rack, each stud passing through a receptive slot. The studs are mounted to an elongated center link. The vehicle's factory tie rod assemblies are bolted to either end of the center link. A pinion housing is secured over a proximate end of the rack tube, maintaining a pinion gear in threaded engagement with the rack. In a manual embodiment of the invention, an outer end of the pinion is connected directly to the steering wheel shaft. In a powered embodiment, a servo having its own pinion gear is bolted to the pinion housing.

Abstract: An aircraft towbar apparatus comprises a pair of tubular members having proximal ends coupled to a hitch assembly for attachment to a towing vehicle. Each tubular member includes a gripping member at a distal end for gripping an aircraft wheel assembly. The apparatus includes a wheel assembly intermediate proximal and distal ends which serves as a fulcrum for vertical positioning of the gripping members relative to an aircraft wheel assembly. A support handle extends from the distal end of one tubular member to enable a user to vertically position the gripping members. A scissor jack is connected to the tubular members and extends therebetween at a position spaced from the distal ends. An elongate handle bar is coupled to the scissor jack and extends to a crank handle adjacent the hitch assembly such that a user may rotatably actuate the scissor jack to vary the spacing between the tubular members.

Abstract: The present invention addresses the need for a handle that is easily and removably attachable to the pin-connection hitch on the tongue of a towed vehicle allowing for manual movement and maneuvering of the towed vehicle. In the invention, a handle is provided that has a portion designed to be easily grippable with a human hand. The handle also has an attachment portion that is configured so as to be attachable with a pin to the pin-connection hitch on the tongue of the towed vehicle.

Abstract: A hitch handle for engaging and facilitating carrying of a hitch head assembly of the type which includes a substantially vertically extending adjustable hitch bar having one or more circular openings. The handle has an L-shaped portion, the elongated leg of which forms a hand grasp for the user and the shortened leg of which extends in a direction to in use bear against a part of the hitch bar. The front leg of the U member is secured to the elongated leg of the L-shaped portion, the U member being in a plane transverse to the plane of the L-shaped portion. The second leg of the U-shaped member is removably receivable in an opening in the substantially vertical hitch bar.

Abstract: A hitch assembly generally includes a hitch receiver that retains an insert by a pin. The pin is preferably hook-shaped and includes a primary pin segment and an engagement terminus. The primary pin segment defines a primary axis transverse to the common longitudinal axis of the hitch assembly. When assembled, the primary segment passes through an aperture located in a first wall of the hitch receiver, the insert aperture of the insert and another aperture in the second wall of the hitch receiver. As a fastener is threadably engaged with a threaded portion of the pin, the fastener pulls the primary pin segment through the hitch receiver and drives the engagement terminus through the second aperture against the insert. The fastener thereby introduces tension in the pin to restrict movement of the insert relative to the hitch receiver and minimize free-play therebetween. In one embodiment, a tamper resistant secondary retainer provides a lock which engages a conical end of the pin.

Abstract: The present invention concerns that of a new and improved apparatus which enables mounting of heavy duty equipment to existing trailer hitch hardware currently found on my pickups, vans, SUV's, recreational vehicles, and automobiles. The type of heavy duty equipment that could be attached to the apparatus of the present invention would include a heavy duty table, a work station, a vise, a spool and/or a winch, and a level working surface.

Abstract: A hitch pin retainer assembly that prevents unintended displacement of a shear pin from a trailer hitch includes a hitch plate assembly having a base plate formed with an aperture adapted to receive the shear pin assembly. The hitch plate assembly also includes a latch plate having a retainer ledge that carries a latch assembly that incorporates a receptacle projecting from the latch plate that captures a spring biased, slidable latch pin that is sized to extend, when in an extended position, above the shear pin. The latch pin is also formed with a handle at one end. The hitch pin retainer assembly can be either bolted or welded to an existing trailer hitch and also includes a tether that can be attached to the shear pin to prevent accidental loss.

Abstract: An articulated vehicle including a front and a rear part, and a coupling member which connects the front part to the rear part, and is adapted to permit articulation of the front part with respect to the rear part about a generally vertical axis whilst also permitting movement of the rear part with respect to the front part about a generally horizontal axis, characterised in that the coupling member includes a body made as a unitary casting.

Abstract: A folding trailer is described including a wheeled first frame portion having a tongue secured thereto which extends forwardly therefrom for connection to a hitch adapter which is mounted on the hitch of the an all-terrain vehicle. A second frame portion is pivotally secured to the rearward end of the wheeled frame portion and a rear frame portion is pivotally secured to the rearward end of the second frame portion in such a manner that it may be pivotally moved upwardly from a horizontally disposed position on the rearward end of the second frame portion to an upwardly extending position. The rear frame portion may be folded onto the second frame portion with those frame portions being folded upon the wheeled frame portion. The trailer may then be pivotally moved upwardly and secured to the rack of the all-terrain vehicle.

Abstract: An improved coupling device for connecting a towing vehicle to a semi-trailer and including a kingpin for attachment to a trailer and a tractor coupling plate for attachment to a towing vehicle, the tractor coupling plate having locking elements for positive and rotatable grasping of substantially rotationally symmetrical surfaces of the kingpin. The kingpin surfaces are formed by the outer surfaces of a thermally coated sleeve disposed about a kingpin stud and rotatable thereon. A method for corresponding modification of used coupling devices is also disclosed.

Abstract: The present invention discloses a quick release hitch pin which comprises an elongated member having a handle thereon which includes a locking assembly. The elongated member has a rod disposed in a central bore spring tensioned outwardly having a plunger on its inner end positioned between a pair of balls positioned in apertures which balls are urged outwardly by the plunger. As the balls are urged outwardly they form a locking member against the underside of the tow bar thereby preventing removal of the elongated member or pin. Alternative embodiments disclose a pair of tabs communicating with the lower portion of a looped rod, with the tabs having tangs thereon which tangs contact the underside of the tow bar when in the extended position thereby preventing removal of the elongated member.

Abstract: A hitch pin retainer assembly that prevents unintended displacement of a shear pin from a trailer hitch includes a hitch plate assembly having a base plate formed with an aperture adapted to receive the shear pin assembly and having a retainer ledge. The hitch plate assembly also includes a latch plate that carries a latch assembly that incorporates a receptacle projecting from the latch plate that captures a spring biased, slidable latch pin that is sized to extend, when in an extended position, above the shear pin. The latch pin is also formed with a handle at one end. The hitch pin retainer assembly can be either bolted or welded to an existing trailer hitch and also includes a tether that can be attached to the shear pin to prevent accidental loss.

Abstract: A hitch assembly for use with a vehicle, where the hitch assembly incorporates a tow loop adapted to be easily coupled to a claw, hook or other like implement of a towing chain or alternatively to a towing strap or rope. The hitch assembly comprises a receiver and a hitch member. The hitch member includes a base portion which slides into the receiver such that only a tow loop of the hitch member is exposed. When not needed, the hitch member can be easily removed from the receiver and a different hitch implement attached to the receiver.

Abstract: A hitch pin for connecting a drawn vehicle to a towing vehicle. The hitch pin includes a pin having a lower end and a transverse collar near its upper end, a handle mounting member extending upwardly at the upper end, and a handle pivotally connecting to the handle mounting member at an axis. The handle includes a pivot portion having a locking lever biased from pivoting downwardly and a latch portion. A first embodiment of the present invention includes the handle mounting member having two opposing flanges with flat inner surfaces and the pivot portion having flat sides such that pivot portion pivotally connects to the mounting member with the sides respectively facing the inner surfaces. A second embodiment thereof includes the handle mounting member having flat sides and the pivot portion having two opposing flanges with flat inner surfaces such that pivot portion pivotally connects to the mounting member with sides respectively facing the inner surfaces.

Abstract: A combination ball and pin trailer hitch for permitting connection to a trailer tongue with either a ball hitch or a pin hitch. The combination ball and pin trailer hitch includes a plate with top and bottom faces, a plurality of side edges, and plurality of corners. The plate has a plurality of bores therethrough extending between the top and bottom faces of the plate. Each of the bores of the plate is positioned adjacent an associated corner of the plate. The plate also has a spaced apart pair of holes therethrough extending between top and bottom faces of the plate. An elongate threaded portion of an attachment bolt is extended through a first of the bores of the plate. A threaded portion of a ball hitch is inserted through another of the bores of the plate. An elongate portion of a pin is inserted through one of the holes of the plate.

Abstract: A hitch assembly for coupling a first agricultural implement, such as a forage wagon, to a second agricultural implement, such as a self propelled or pull type forage harvester. The hitch assembly includes a substantially vertical hitch pin affixed to the first agricultural implement, and a drawbar affixed to and extending rearwardly from the second agricultural implement. A hitch plate, affixed to the drawbar, has a rearwardly facing notch adapted to accommodate the pin under conditions where the first agricultural implement is positioned adjacent the drawbar. A latch plate pivotally mounted on the hitch plate, reciprocates between open and closed positions, for holding the pin in the notch under conditions where the pin is accommodated by the notch and the latch plate is in the closed position. The latch plate is held in the closed position by a latch reciprocal between extended and retracted conditions.

Abstract: A towing head is provided including three primary members. The first member is stationary and includes a channel which receives the tow pin or towing fitting of an aircraft. The second member pivotally attaches to the first member and itself includes a channel which communicates with the channel of the first member. The third member rotatably attaches to the second member and includes a handle for which to place the towing head in either a locked, partially locked, or unlocked position. In the unlocked position, the second member is moved away from interfering with the channel of the first member so that the tow pin or fitting may be freely inserted or removed from within the channel of the first member. In the locked position, the second member is moved to a position so that it interferes with the channel of the first member and prevents the tow pin from being removed from the towing head.

Abstract: In the pinned connections between frame members of articulated machines, it is typical to utilize one or more pin assemblies that have one or more spaces between the various components in the pin assembly. The present invention comprehends a pin assembly 10 that utilizes a first plurality of fasteners 82 to secure a first lock plate 72 to one of a pair of frame members 12 and 18. A first shim assembly 86 is included to remove any space between components along a first path of force transfer. A second plurality of fasteners 92 is utilized to mount a second lock plate 90 to a pin member 44. A second shim assembly 94 is included to remove any space between components along a second path of force transfer. The fasteners 82 and 92 work in conjunction with one another to greatly reduce flexing, and thereby the tendency for the fasteners to loosen, that occurs in a pin assembly 10 due to the transfer of forces therethrough.

Abstract: A draw pin assembly includes a hammer strap that mounts on the drawbar and a draw pin that extends through aligned draw pin holes in the hammer strap and drawbar. A latch mechanism supports the draw pin in a retracted position while a trigger in the hitch-receiving space of the assembly releases the latch when a towed implement hitch comes into the proper alignment with the draw pin. An automatic locking mechanism is used to lock the draw pin against inadvertent release. The latch and locking functions are provided by a loop type handle connected to the draw pin. This eliminates elements projecting above the hammer strap to maximize the clearance for a tractor power takeoff.

Abstract: A towing arm device comprising an elongated arm with mounting structure at one end of the arm for pivotally attaching the arm to a tractor hitch at the rear of the tractor to enable pivoting of the arm upward and downward about the axis of the tractor hitch. The towing arm device has an eyelet mounting plate for mounting to the bumper of a truck for towing the truck by the tractor. The arm has a hydraulically actuated latch receivable in the eyelet from beneath the eyelet and hydraulically engagable with the eyelet for latching the other end of the towing arm to the eyelet on the bumper of the truck. The towing arm has a hydraulic piston and cylinder for pivoting the tow arm upward to engage the other end of the towing arm with the eyelet from beneath the eyelet for the latching operation whereby the towing arm may connect the tractor to the truck for the tractor to tow the truck.

Abstract: A draw pin assembly includes a hammer strap that mounts on the drawbar and a draw pin that extends through aligned draw pin holes in the hammer strap and drawbar. A latch mechanism supports the draw pin in a retracted position while a trigger in the hitch-receiving space of the assembly releases the latch when a towed implement hitch comes into the proper alignment with the draw pin. An automatic locking mechanism is used to lock the draw pin against inadvertent release. In one embodiment, the draw pin is fully recessed into the hammer strap when set and the latch and locking functions are provided by a loop type handle connected to the draw pin. This eliminates any elements projecting above the hammer strap to maximize the clearance for a tractor power takeoff.

Abstract: A system for coupling synthetic boomsticks having a pair of spaced parallel substantially horizontal coupling flanges projecting axially therefrom. The flanges form a loop receiving space therebetween and a coupling pin passes through this space between the flanges to lock a loop therein. The coupling pin is lockable in closed position to hold loop in place. A coupling pin and slot prevents rotation of the coupling pin except when the coupling pin is in retracted open position.

Abstract: A rack mounting support adapted for use with hitchless vehicles. The mounting support has a mount in the form of a receiving member and a socket member wherein the receiving member is attached onto a vehicle's frame members to minimize reduction of a vehicle's ground clearance. The socket member and frame member are dimensioned to allow the frame member to remain securedly inserted within the socket member and facilitate a person to attach the frame member to the socket member without having to simultaneously support the frame member.

Abstract: An implement hitch system is intended to be mounted on the tongue of a towed vehicle. The hitch has a hitch body with a standard ring coupling. A ring adapter can be mounted on the hitch body to adjust the size of the ring opening to accommodate draw pins of different sizes. The adjustment includes a resilient backstop that cushions the hitch and minimizes chattering. The system also includes a clevis attachment for the hitch that bolts onto the hitch body to provide a clevis type hitch for engaging a single tractor drawbar. An additional feature is a wear plate that may be bolted onto the ring to accommodate high vertical loads.

Abstract: A tow-behind implement and a hitch therefor are provided. The hitch is for securing the implement to a pulling vehicle such as a tractor. The hitch attaches a farm or industrial implement to the drawbar of a pulling vehicle. The hitch mechanism includes a clevis swingingly and rotatably mounted to an offset hitch component which is secured to the tongue or the like of the pull-behind implement. This swinging attachment is at a location forward of the hitch pin. The clevis remains parallel to the drawbar regardless of the attitude of the implement in order to increase contact surface area. In addition, the weight of the implement is ahead of the hitch pin in order to reduce stress on the drawbar. Angular movement which is provided by the hitch is greater than that provided by standard implement hitch devices.

Abstract: A quick-attachment fastener has an elongate barrel and a plunger translatable in forward and aft directions in the barrel. A pivot pin in the barrel extends through the plunger and has an axis fixed relative to the barrel. An arm on the pin swings between a retracted position in the barrel and a deployed position where the arm extends from the barrel. An aft facing part of the plunger engages the arm so that a spring biasing the plunger urges the arm toward the deployed position. A forward facing part of the plunger opposes the arm so that aft plunger translation swings the arm to the retracted position.

Abstract: There is disclosed an improved grain cart comprising a mobile frame adapted to be pulled by a vehicle, such as a tractor. The frame supports a grain hopper or box. The hopper includes an inset front corner area. An auger for unloading grain from the hopper is located entirely outside the hopper. The auger includes a sump for receiving grain from the hopper, the sump being positioned on a lower, outside wall portion of the inset front corner area. Between the sump and the surface of the outside wall portion of the inset front corner area there is a grain shut off door for controlling a flow of grain from the hopper to the sump. A hydraulic cylinder is mounted adjacent to the sump and is connected to the grain shut off door for opening and closing the door. A conduit is connected to the sump, and a drive assembly is provided for conveying grain through the conduit. The drive assembly includes a gear box having a shaft connected to auger flighting disposed inside the conduit, and a drive shaft.

Abstract: A power operated, draw bar mounted hitch for connection to the tongue of a farm implement has a fixed draw pin and a bottom hammer strap that engages under the tongue and raises the tongue onto the draw bar, where it is captured in place between the bottom hammer strap and a top hammer strap mounted on the draw bar. The hitch has an automatic self locking feature that automatically locks the hitch when it reaches the engaged position.

Abstract: A hitch assembly for releasably coupling an agricultural implement to a tractor frame. The hitch assembly includes a cantilevered drawbar rearwardly extending from the tractor frame. A free end of the drawbar is suited for connection to a tongue of the implement. A force transfer assembly interconnects the free end of the drawbar to the tractor frame and includes an elongated rigid link for transferring forces imparted to the drawbar by the implement to the tractor frame thereby enhancing support for the drawbar.

Abstract: A hitch to be used with a one-wheeled trailer to be towed by a bicycle, motorcycle, moped, or other cycle or two-wheeled vehicle. The hitch is mounted relatively permanently to the seat post of the towing cycle but is free to swivel around said seat post as the trailer tracks around curves. The frame of the trailer to be towed has a frame the front reach of which consists of transversely disposed rounded bar or tubing. The essential universal-joint connection that makes a one-wheeled trailer feasible is completed by this rounded front reach of the frame captured rotatably within a horizontally disposed, rearward-facing slot in the hitch block. The capture is completed by means of a vertical, quickly removable pin preferably containing a spring-ball plunger. The pin is inserted behind said bar or tubing.

Abstract: A hitch pin is arranged for coupling a tongue relative to a socket of a conventional hitch structure to include a central cylindrical body formed with a top plate member mounted to the body. The top plate member includes a plurality of first diametrically disposed latch members, each latch member including a concave saddle positioned at an upper end of each latch member at an upper end of a ramp of each latch member to receive a handle loop upon each saddle to withdraw a central lock rod through the cylindrical shaft. The lock rod includes an actuator plug mounted to the lock rod spaced from a lower terminal end thereof to effect displacement of a plurality of locking legs exteriorly of the shaft. The lower terminal end portion of the lock rod includes a lock rod lower end plate to capture a spring between the lower end plate and a cylindrical shaft cavity floor.

Abstract: A hitch for connecting the tongue of a towed vehicle to a drawbar on a towing vehicle is manually operated from the cab of the towing vehicle. The drawbar is of the double-tongue type that receives the trailer tongue between two drawbar arms. A draw pin is maintained on an arm below drawbar and pivots upwardly to couple the drawbar and tongue. The operating mechanism includes a manual actuator in the cab and a mechanical or hydraulic power transmission joining the actuator to the pin setting or pulling mechanism.

Abstract: A separator, for example of the type used for the separation of hazardous materials, is docked to an industrial vacuum source, such as a truck mounted industrial vacuum loader, utilizing a docking system adapted to provide ease of attachment and separation. The docking system allows rotational and elevational control of the separator and provides retrofit capability for existing systems. Furthermore, by using the readily detachable separator described in the present specification, a single separator may be used with a variety of trucks, thereby increasing overall fleet efficiency.

Abstract: A draw bar for a towing tractor includes a draw bar bracket mounted on a weight of the towing vehicle, a draw bar pin provided for axial movement in an insertion opening in the draw bar bracket, an actuating lever provided near a driver's seat of the towing tractor, and a link unit interconnecting the actuating lever and the draw bar pin for shifting the draw bar pin on actuation of the actuating lever. The link unit is provided in the weight through an opening formed in the vicinity of the draw bar bracket of the weight and an opening formed in the vicinity of the actuating lever.

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 safety device for maintaining in place a pin connecting the drawbar of a tractor to the tow bar or tongue of a towed piece of equipment. The safety device is mounted on the drawbar and is slideable along the drawbar. An arm extends outwardly from the device, and the device is moved so that the arm is over the top of the drawbar pin when the pin is in place thereby preventing it from becoming disengaged from the drawbar and tongue. A locking pin prevents the safety device from sliding along the drawbar so as to keep it in its pin retaining position.

Abstract: The present invention is directed to an apparatus for engaging and lifting the end of a hitch resting on the ground. The apparatus is particularly useful when attached to a yard tractor used for moving trailers or trailer dollys about a parking yard. The apparatus includes a rigid member pivotally attached to a frame attached to the yard tractor. The free end of the rigid member has a plate for scooping under the end of the hitch. A hydraulic actuator remotely rotates a pin into engagement with the end of the hitch. Another actuator pivots the rigid member upwardly to lift the end of the hitch for subsequent movement of the trailer or dolly.

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: A retainer assembly retains a pair of connecting pins in place within a drawbar arrangement. The connecting pins connect various draft implements to the drawbar and hold the drawbar in a preselected angular position. The retainer assembly provides easy connection of the pins to, or removal from, the drawbar while maintaining the pins in a secured working position. The retainer assembly includes a retainer plate which is spring loaded and is easily manipulated from a first position in which the pins are covered and constrained, and a second position in which the pins are vertically unconstrained. Previous pin retainers for drawbar arrangements used various means to lock or retain a pin in a coupled position, including keys, detents, screw threads, etc. Such previous pin retainers were cumbersome and generally required considerable time and effort to unlock and remove the pin. A worker generally needed to use two hands to couple or release the locking pins.

Abstract: A dolly for connecting two trailers in tandem comprises an axle, wheels rotatably mounted thereon, a fifth wheel secured to the axle, two towing eye hooks spaced apart from each other for connecting the dolly to the rear of the lead trailer so that controlled backing up of the entire tractor trailer rig is facilitated, and a sleeve swivelable about a tongue in such a manner so that the dolly may be hooked to the rear of the lead trailer on uneven ground and further so that side drag or "scooting" of the rear wheels on the lead trailer is avoided.

Abstract: In a trailer coupling having two independently effective securing arrangements, of which the one is formed by an opener lever and the other by a securing bolt, the opener lever engages in an upwardly partially open slot of the coupling bolt and is reinforced by a disengaging cam which emerges upwards from the slot and co-operates with the securing bolt in the direction of its disengagement.

Abstract: The present invention relates to a releasable lock mechanism (10) for preventing accidental displacement of a hitch tow pin (24). The tow pin (24) is alternately released and locked in place by pivoting a cam lever (40) 180 degrees which action causes a spring biased member (28) horizontally supported by a support bracket (12) to slide forward over the hitch tow pin (24) and alternately backward away from the hitch tow pin (24) to enable the hitch tow pin (24) to be readily removed.

Abstract: A trailer coupling is proposed which, after transference of the coupling bolt into the non-coupling position, is insensitive to small relative movements of the towing eye, still situated in the coupling body, in relation to the coupling body, that is to say does not drop back into the coupling position, and in which, on the other hand, the coupling bolt can be caused by the entry of the towing eye to return into the coupling position, without a repeated manual action upon the automatic coupling system being necessary.

Abstract: A towline is mounted on a pulling vehicle and at one end of the towline a hitching member is secured; the towing vehicle includes a bracket for receiving the hitching member and a locking pin for securing the hitching member in a socket of the bracket; with the locking pin removed, the winch can play out the cable to connect the hitching device to an implement to be towed or pull an implement toward the pulling vehicle.

Abstract: A self-locking, safety hitch pin for connecting the tongue of a farm implement to the drawbar of a towing vehicle, such as a tractor. The pin has a handle pivotally connected to it at its upper end, the handle extending to the lower end of the pin to prevent it from inadvertently falling out of the connection. A spring-biased locking member is combined with the upper end of the handle and pin to automatically lock the handle in place when the handle is lowered to a closed position.

Abstract: A device for locking a hitch pin in a tongue hitch including a sleeve around a pivot pin mounted on the tongue. A retainer plate is mounted against the sleeve and pivotable about the pivot pin between a first position clear of the hitch pin and a second position blocking the hitch pin from withdrawal from the hitch connection. Stops are provided on both the tongue and the plate and a spring biases the stops together, in which position the plate is disposed above the hitch pin to lock it in the hitch.