Abstract: A hydraulically-operated support device for semitrailers is disclosed comprising a hydraulic cylinder semitrailer support and a pump subassembly having three independently operable pumps for generating and controlling the hydraulic operating pressure. The hydraulic cylinder semitrailer support has an extending piston in an extending cylinder, in the bottom end of which is formed a load-raising cylinder for a load raising-piston. A first annular space is formed between the extending piston and the extending cylinder and a second annular space is formed between the load-raising piston and the load-raising cylinder. The annular spaces allow application of pressure in the retraction direction. The pump subassembly comprises an extending pump acting on the extending piston, a load-raising pump acting on the load-raising piston and a retracting pump acting on the annular spaces.

Abstract: Disclosed is a utility trailer having one or more stabilizers attached thto. The stabilizer is comprised of a pair of flat arms pivoted to the trailer and extending away therefrom, the arms defining holes disposed one above the other. A stanchion is vertically translatable through the holes in the arms and a spring in tension is stretched between the free end of the arms, whereby the free ends are biased toward each other and the edges of the arm holes bind against the stanchion to hold it in position. The arms may be pivoted away from each other to free the stanchion from the edges of the arm holes so as to allow the stanchion to be vertically translated to a new position relative to the trailer. A ground engaging foot is connected to the lower end of the stanchion.

Abstract: Landing gear for a vehicle such as a trailer, comprising a leg, a foot at the lower end of the leg adapted for engagement with the ground, a pair of generally channel-shaped members forming a tube which extends up from the foot and telescopically receives the lower end of the leg, an elastomeric member disposed in the tube between the lower end of the leg and the foot, and a bearing plate in the tube interposed between the elastomeric member and the lower end of the leg. The tube is attached to the lower end of the leg to permit limited telescopic movement of the leg and the foot whereby the foot is adapted to move upwardly relative to the leg as the landing gear accepts the weight of the vehicle thereby resiliently to compress the elastomeric member between the foot and the bearing plate. A method of making the foot and tube of the landing gear is also disclosed.

Abstract: A remote actuator and interlock for a trailer hitch of the type having a main body, a ball receiving socket at one end of the main body with the other end of the main body being attachable to the end of a trailer. A pivotal member is hinged at the ball receiving socket end of the hitch. The main body and the pivotal member form hinged sections and the socket is formed jointly in the two hinged sections. A collar is reciprocatingly received about the main body and positioned to releasably receive the free marginal end of the pivotal member therein to thereby releasably latch the hinged sections together so that a ball can be captured therewithin. A remote actuator with interlock is mounted to the hitch apparatus by which the hinged sections are forced together and thereafter the collar is moved into the latched position over the hinged sections. The remote actuator includes a control lever pivotally mounted for movement respective to said main body.

Abstract: A parking stand for supporting the tongue of a parked trailer. The parking stand has a coupling ball at its upper end for engagement in the socket of a coupling part on the front end of the trailer tongue and a castor wheel or fixed base at its lower end for supporting the stand on the ground. A clamp on the upper end of the stand acts against the trailer coupling part to secure the stand against swivel movement relative to the trailer tongue.

Abstract: The invention provide an improved trailer dolly and an improved trailer dolly tongue support jack. More specifically, the invention provides a trailer dolly which includes a tongue support jack which is effective and convenient to operate. In the preferred embodiment, the improved dolly includes a tongue support assembly permits the dolly tongue jack to be rotated between and automatically locked in the tongue support positions and the trailer use positions. Although the tongue jack was developed primarily for use with trailer dollys it can be used to support conventional trailer tongues and similar uses.

Abstract: A tractor-trailer landing gear mechanism for helping support a trailer end, includes a pair of elongated extendable and retractable telescoping legs. A reversible electrical motor interconnects the legs, for causing them to be retracted or extended to a desired predetermined latching position. The upright tubular member includes a plurality of outwardly extending bores, for receiving a plurality of corresponding latching pins. A plurality of similar normally deactivated solenoids are disposed on the outer sleeve to drive a safety pin into latching engagement with a corresponding bore, when the leg is extended to a desired length. A plurality of normally deactivated detectors are mounted on corresponding solenoids, for sensing the presence of a predetermined latching position. A control board includes a plurality of manually activated switches, for causing the motor to rotate in predetermined directions, and for causing the landing gear mechanism to either retract or extend.

Abstract: Landing gear for a vehicle such as a trailer, comprising a leg, a foot at the lower end of the leg adapted for engagement with the ground, a pair of generally channel-shaped members forming a tube which extends up from the foot and telescopically receives the lower end of the leg, the members being generally symmetric about a central vertical plane of the tube, an elastomeric member disposed in the tube between the lower end of the leg and the foot, and a bearing plate in the tube interposed between the elastomeric member and the lower end of the leg. The tube is attached to the lower end of the leg to permit limited telescopic movement of the leg and the foot whereby the foot is adapted to move upwardly relative to the leg as the landing gear accepts the weight of the vehicle thereby resiliently to compress the elastomeric member between the foot and the bearing plate. A method of making the foot and tube of the landing gear is also disclosed.

Abstract: An auxiliary wheeled support for the rear of a trailer works in combination with the wheeled front trailer jack to increase the maneuverability of the trailer by raising the main trailer wheels off the ground. The invention disclosed swings to a storage position when not in use, and is adjustable to fit a range of trailer heights.

Abstract: A hitch assembly and method for connecting a vehicle to a towed apparatus and releasing the towed apparatus from connection to the underlying supporting surface has a tongue which is connected to the towed apparatus and a socket engaging device mounted on the vehicle. The socket engaging device is movable from a first position at which the tongue is free from connection to the vehicle to a second position elevationally spaced from the first position at which the tongue is connected to the socket engaging device. An actuator which is mounted on the vehicle and connected to the socket engaging device elevationally moves the socket engaging device between the first and second positions. A tongue supporting member is movable from a surface supported position to a socket engaging device supported position spaced from the underlying surface in response to movement of the socket engaging device from the first position to the second position.

Abstract: A hitch adapter couples a semi-integral, PTO-driven implement to a quick coupler carried by a tractor three-point hitch. The hitch adapter includes a drawbar located significantly below the level of the connection of lower three-point hitch link with the quick coupler and a parking stand is integral with the bottom of the drawbar. Lowering of the three-point hitch from a normal working position results in the stand engaging the ground to prevent interference between the hitch and the drive shaft coupling the implement to the tractor PTO shaft. Once the stand engages the ground, the hitch adapter can be disconnected from the quick coupler hooks by releasing latches associated with the lower hooks and lowering the three-point hitch.

Abstract: A trailer swivel wheel assembly incorporating a gooseneck-shaped axle to carry a standard wheel rim and tire. The axle is removably received within a swivel housing pivotably mounted to the tongue bar of a trailer, and pivotable to position the wheel between raised position above the tongue bar, a lowered position below the tongue bar, and intermediate positions therebetween. The trailer swivel is secured at each position by a spring loaded locking pin carried on the swivel housing. The axle swivels within the swivel housing to permit the trailer to be maneuverably positioned while the trailer tongue is supported on the wheel rim and tire.

Abstract: An attachment for a boat trailer to enable a boat carried by the trailer to be raised and stored above the water, the attachment being readily applied to a conventional trailer by the use of relatively simple tools and comprising a pair of extensible legs which are moved from a normal retracted position to an extended position to raise the trailer sufficiently with respect to the water that the boat is supported above the surface of the water.The extensible legs may either be legs which are rocked or legs which are formed of two telescoping parts so that one part of each leg can be moved with respect to the other part to effectively extend the leg.

Abstract: A cultivator has a blade secured to a frame. The blade is downwardly projected from the frame and has an edge at the forward side thereof. An air injector is provided at a lower portion of the blade. The frame is supported with the blade and the injector above the ground by a pair of supporting wheels and a stand which are changeable to a criss-crossed stored position to permit the cultivator to be moved downwardly to its operative position.

Abstract: A hitch linkage for hitching an implement to a front mount riding mower including a plurality of hitch arms detachably mounted to the lift arms of the riding mower. A cross-link is pivotally mounted between the hitch arms. The support struts of a support wheel are fixably mounted to the cross-link. A cylinder selectively pivots the cross-link to raise or lower the support wheel. When the support wheel is lowered into ground engaging position, the support wheel is leading to the drive wheels of the riding mower during implement transport.

Abstract: A dual function cart convertible between a wheelbarrow-type load transporter and a vehicle towed cart. The cart comprises a frame supporting a load carrying tube, the frame including a transversing extending axle having relatively large diameter spoked wheels journaled for rotation on opposed ends of the axle. Pivotally secured to the frame is a handle assembly in the form of a rectangular loop which, when latched by a removable rod in a first position orients the handle in an upright plane where the vehicle can be operated as a wheelbarrow. Alternatively, the removable rod may be used to latch the handle in a generally horizontal plane at an elevation facilitating connection thereof by a clevis to a hitch on a towing vehicle. The cart also includes an auxiliary side member which may be secured to the tub for increasing the effective load-carrying volume of the tub.

Abstract: Structurally integrated apparatus of various configurations is selectively, individually or conjointly detachably attachable to an all terrain vehicle for conveying or carrying various types of cargo and for preventing rearward tilting of the vehicle. Supports extending from the framework of the vehicle are adapted to receive and retain with quick disconnect fittings frame elements of each configuration of the apparatus. The frame elements may be adjustable to accommodate variations in size, shape and weight of the cargo supported by the respective apparatus.

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: This invention is an adjustable height hitching device adapted to connect a towed vehicle to a towing vehicle. The invention consists of a tow bar pivoted upon an attaching element which is coupled to the towed vehicle. The end height of the tow bar can be varied by a turnbuckle movably coupled between the tow bar and the attaching element. The height of the coupling portion of the tow bar can be adjusted to the height of the coupling on the towing vehicle.

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: A flat-floored trailer having wheels, a load bed and coupling structure assembly including a load floor structure having a lateral cross section in the form of an "inverted top hat" and comprising a central rectangular floor panel attached by suitable fastener means along each longitudinal edge to the lower horizontal flange of a formed panel incorporating a lateral section of "Z" form with a vertical wall joining the lower horizontal flange to an upper horizontal flange or floor surface; the right formed "Z" section panel being a mirror image form of the left formed "Z" section panel and each formed panel being shaped in a parallel configuration of bends and edges and being of approximately the same length as the central rectangular floor panel;the load bed being attached to an "A" frame coupling structure comprising left and right structural bar legs joined at their forward ends to a common coupling bracket and joined toward, but forward of, their rearward ends to a common structural bar cross member; the "

Abstract: This hitch assembly includes a frame which is fixedly attached to the rear of a truck and extends widthwise of the truck to provide upper and lower horizontal rails. A transverse carriage having upper and lower roller assemblies engageable with the rails is mounted to the frame and moved laterally relative to the frame by means of a ram assembly. The ram assembly includes a piston extending from end-to-end of the frame and a cylinder which is fixedly attached to the carriage and movably mounted to the piston. A vertical lift carriage is slidably mounted to the transverse carriage and is movable vertically relative to the frame by a ram assembly. The vertical carriage includes a hitch ball for attachment of a trailer tow bar and the transverse and vertical carriages provide the hitch connection and the tow bar with vertical and laterally horizontal components of movement.

Abstract: A load handling vehicle having two mutually articulated chassis elements respectively carrying ground engaging wheels and a drive motor, the first chassis element carrying a prop located below the articulation pivot and moveable between a raised retracted position and a downwardly extended work position in which the prop raises the wheels of the second chassis element from the ground so that the second chassis element can be rotated about the articulation pivot to angularly position a load bearing arm carried by the second chassis element with respect to the longitudinal axis of the vehicle.

Abstract: A boat trailer including a frame having a tongue rigidly connected thereto and an axle with wheels thereon connected to the frame by springs, the frame also having pivotally connected thereto a ramp mounted on the rearward end of the frame on an axis perpendicular to the longitudinal axis of the tongue of the trailer, the ramp being mounted independently of the wheels supporting the frame, the ramp having the major portion of its length extending forwardly of the perpendicular axis of the frame and a plurality of rollers mounted in the center thereof, and having two flat runners extending parallel and perpendicular to the pivotal axis of the ramp for supporting the weight of the boat.

Abstract: A camping and recreation trailer that can be used as an ice fishing house in winter, a summer picnicing unit, can be disassembled for storage and has a foldable hitch that locks the unit into a stable position.

Abstract: A downwardly opening inverted channel is provided for mounting to the underside of a trailer tongue with the channel extending longitudinally of the tongue. The channel includes a pair of depending opposite side flanges interconnected along the upper marginal edges by a bight portion extending therebetween and a generally U-shaped leg assembly including upstanding legs interconnected at their lower ends by a horizontal cross piece has the upper ends of first and second legs thereof pivotally supported from the outer sides of first and second flanges, respectively, of the channel by first and second pivot structures for angular displacement of the U-shaped leg assembly relative to the channel about substantially aligned axes extending transversely of the channel. The leg assembly is swingable between a downwardly extended depending and slightly downwardly and forwardly inclined position and a rearwardly projecting upwardly retracted horizontal position.

Abstract: The cargo retainer comprises a floor contacting member having an upwardly facing load bearing surface which is adapted to project forwardly beneath the cargo load and an upright member secured to the floor contacting member in spaced relation from the forward end of the floor contacting member for engaging with the face of the cargo load. Transversely spaced wheels are rotatably mounted adjacent to the rear end of the floor contacting member and are out of contact with the floor when the floor contacting member of the cargo retainer is resting on the floor. The wheels engage with the floor for wheeled maneuvering of the retainer only when the forward end of the floor contacting member is raised relative to the floor. Further, the upright member is vertically extendible to accommodate load heights exceeding the normal height of the retainer unit.

Abstract: Recreation and work-type trailers are difficult to maneuver once detached from the towing vehicle even with the conventional dolley wheel in place. This device includes a horizontal main bar with a pair of plates one at each end being mounted to the underside of the main bar by a bolt and spring loaded to give a limited flexibility thereto. A central socket is pivoted to the upper side of the main bar and receives the stem of the trailer hitch. A handle socket is secured adjacent each end of the main bar also on the upper surface thereof and incline upwardly and outwardly therefrom and selectively receive an elongated handle so that the respective end of the main bar can be elevated by the handle and "walked" forwardly or backwardly or sideways as desired thus maneuvering the trailer readily and easily.

Abstract: An implement coupling arrangement characterized by a plate selectively positionable along an upstanding column onto which an implement connecting sleeve is slidably received, where the aforesaid plate supports a conventional jack for accomplishing vertical adjustment of the implement to a desired hitching height. The jack is arranged for rotation from a use position to a transporting position, where provision is made for maintaining the jack handle at a fixed location during transporting.

Abstract: A mount is provided for securing a jack to the tongue of a trailer, and the like. The mount in one embodiment includes two separate brackets, each having a gusset-like configuration; the brackets being welded or bolted to the tongue in position such that the forward edges of a pair of upright sides of each of the brackets engages the jack in essentially diametrically opposite relationship to the jack. These edges are welded to the jack, and the resulting assembly provides a rugged, rigid, strong and simple mount for the jack. In a second embodiment the mount is formed of a single piece.

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 hitch for connecting a prime mover such as a tractor to an implement such as a plough to be drawn by the prime mover. The hitch comprises a two part prime mover drawbar and a separate single part implement drawbar. One part of the prime mover drawbar is connectable to the prime mover, the other part carries a spring loaded first latch, the implement drawbar carries a second latch, the first and second latches being arranged to secure the prime mover drawbar and the implement drawbar.

Abstract: A device is disclosed which is securable to a vehicle with a single rear wheel comprising a cart which is ground-engaging, an attachment device securing the cart to the vehicle with a single rear wheel at a point above the single rear wheel, and a cart framework within the cart which is positioned above the center of gravity of the cart.

Abstract: A cargo retainer having a floor contacting member provided with an upwardly facing load bearing surface and an upright member secured adjacent to one end of the floor contacting member is provided with a floor piercing element. The floor piercing element is movably mounted adjacent to the juncture between the floor contacting member and the upright member and is movable between a floor piercing position and a position rendering the element incapable of piercing the floor.

Abstract: A hitch for allowing a trailer to be first disconnected from a vehicle, to be then jacked so it is level with the support surface, and then be automatically jacked back to the level of the vehicle so that it can be easily reconnected to the vehicle. A switch is pivotally associated with the trailer for movement in a plane parallel to a vertical plane extending along the longitudinal axis of the trailer. A lock is provided for locking the switch in any one of an infinite number of positions with the longitudinal axis of the switch in the plane parallel to the vertical plane extending along the longitudinal axis of the trailer.

Abstract: A demountable transporter for ISO containers has attaching elements with quick attachment latches including shear blocks, for insertion into the openings of the corner fittings, and locking plates, for insertion into the interior cavity of the corner fitting where they may be turned to secure the locking plate. Wheeled jacks are mounted on the lower attaching element of the transporter for easy movement of the transporter to the container and subsequent alignment. The two transporter sections may be joined together without the container by means of the lower attaching elements fastening to a joining block having openings like an ISO corner, and joining plates on the frames of the sections to which the upper attaching elements of opposite frames may be secured.

Abstract: Apparatus for mounting a spare wheel on a tongue of a trailer including a wheel supporting hub, a first shaft extending from the rear of the wheel supporting hub, the shaft being rotatably carried within a first shaft supporting sleeve, a retainer for retaining the first shaft within the first sleeve, an arm extending from the first sleeve substantially perpendicular to the axis of the first shaft disposed within the first sleeve, the end of the arm remote from the first sleeve being affixed to one end of a second shaft, the second shaft being disposed substantially parallel to the first shaft and extending from the arm in a direction opposite to that from which the wheel supporting hub extends from the first shaft, the second shaft being rotatably carried by a second sleeve, biasing means associated with the second shaft urging the arm toward the second sleeve, locking devices for fixing the arm with respect to the adjacent second sleeve in more than one position, and a mounting assembly associated with the

Abstract: Apparatus for hitching mobile equipment, such as a towing vehicle and a towed vehicle, comprising a U-shaped locking member slidably mounted for lateral movement on the rearwardly extending draw bar of the towing vehicle. The draw bar is provided with a rearwardly opening slot that is adapted to receive therein a pin on the forward portion of the tongue connected to the vehicle to be towed. The rear leg of the U-shaped locking member is movable across the rearwardly opening slot in the draw bar to lock the tongue pin therein. The U-shaped locking member is biased to the closed or locking position by a spring, and a manually operable locking pin is movably mounted on the draw bar to releasably lock the U-shaped locking member in an open or a closed position.

Abstract: A dump body vehicle module for connection to a tractor module to form a complete vehicle. The dump body module includes a horizontally disposed frame with wheels adjacent one end and a coupling portion adjacent the other end for connecting it to a tractor module. A dump body is pivotally mounted on the frame for movement between a carrying position and a dumping position and hydraulic actuators are provided to move the dump body between the two positions. A pair of leg members are pivotally mounted on the dump body for movement between three positions, one a leg storage position, another for supporting the module on the ground, and the third for supporting the dump body in an elevated position relative to the frame.

Abstract: A self-releasing jack for installation on a trailer tongue that releases upon the application of strong rotational forces applied to the base of the jack when the trailer is inadvertently towed without raising the jack.

Abstract: A hitch bar pivotally attached to a clevis connection of a towed vehicle mates with a hollow hitch body resiliently mounted to a towing vehicle. The hitch bar has a pivotal support leg which maintains it at the proper elevation and which is automatically pivoted to a raised storage position when the hitch components are coupled together. As the hitch body receives the bar during the coupling process, a spring loaded latch block enters a notch in the bar to secure the hitch components together. The latch is maintained in the hitching position by a rigid locking pin.

Abstract: A pneumatic jack assembly is pivotally secured to the tongue of a single axle trailer to assist an operator in lifting the tongue for engagement with the coupling member of a tow truck. The jack assembly includes a ground-engaging strut pivotally secured to the tongue and a pneumatic power assembly transversely disposed with respect to the tongue. The power assembly includes a cylindrical housing for receiving compressed air and a piston operably coupled to the housing for transmitting a mechanical force in response to power derived from the compressed air. The housing is pivotally secured to the tongue and the piston is pivotally secured to the strut to permit rotational movement of the housing and tongue relative to each other and relative to the strut as the tongue is lifted by the force exerted by the piston. In a preferred embodiment, the penumatic power assembly derives its operating energy from a source of compressed air carried by the trailer.

Abstract: Apparatus for hitching mobile equipment, such as a towing vehicle and a towed vehicle, comprising a U-shaped locking member slidably mounted for lateral movement on the rearwardly extending draw bar of the towing vehicle. The draw bar is provided with a rearwardly opening slot that is adapted to receive therein a pin on the forward portion of the tongue connected to the vehicle to be towed. The rear leg of the U-shaped locking member is movable across the rearwardly opening slot in the draw bar to lock the tongue pin therein. The U-shaped locking member is biased to the closed or locking position by a spring, and a manually operable locking pin is movably mounted on the draw bar to releasably lock the U-shaped locking member in an open or a closed position.

Abstract: A trailer frame is provided with a positioning member for releasably receiving a towbar and parking stand thereto. The towbar is provided with a releasable locking device thereon for positioning the towbar in a plurality of positions. Generally, the towbar is adaptable for positioning in a towing position, an operating position, and a storage position.

Abstract: An elongated bar is mounted on a trailer tongue for longitudinal sliding and lateral pivoting movement relative thereto, the forward end of the bar providing releasable engagement with a trailer hitch ball component on a tow vehicle. In one embodiment the forward end of the bar has a centering notch arranged to engage the stem of the hitch ball, the bar underlying the companion hitch socket component on the trailer tongue. In another embodiment the forward end of the bar is provided with the socket component of a trailer hitch for engagement with the companion ball component on a tow vehicle. The rearward end of the bar is connected to a pair of restraining chains or rods which are connected to laterally spaced terminals on the tongue, such that the chains or rods limit the rearward, forward and lateral movement of the bar.

Abstract: A waste collection system including a trailer and a towing vehicle which is selectively interconnectable with the trailer. The trailer, which may be divided into a number of separate interior compartments, has a prow-shaped forward end wall which extends beyond and above the trailer hitch to enlarge the material-receiving capacity of the trailer. A towing vehicle is disclosed which can selectively elevate and tilt the trailer sufficiently to dump the contents of the trailer. An alternative towing vehicle is disclosed which provides a trailer hitch having a limited extent of vertical adjustment necessary to raise and lower a parking support associated with the trailer. The trailer is provided with a ground support stand which is automatically locked in downward support position.

Abstract: A castor wheel, preferably of the swivel type is mounted at the distal end of a leg support which is in turn connected to pivot on an axle transverse and beneath the tongue of a trailer. Means are provided to connect a winch associated with the trailer tongue to the leg support opposite the castor. The application of force through the winch pulls the castor wheel downward beneath the trailer tongue, thereby adjusting the elevation of a hitch mechanism carried by the trailer tongue.

Abstract: A mounting plate enables the stand to be mounted to any standard hitch bar. A front leg is pivoted by the upper end thereof to the front of the plate and extends downwardly and rearwardly thereof, terminating in a curved ground engaging skid. Over-center linkage is pivoted between the skid and the mounting plate extending upwardly and rearwardly towards said mounting plate when in the extended position. A lever action makes or breaks the over-center linkage thereby extending or retracting the jack stand.

Abstract: A concrete mixer truck and a concrete mixer trailer with each adapted for mixing a concrete mix in transit and at a construction site and for discharging the mix at the site. The concrete mixer trailer towed by a concrete mixer truck includes a leading axle, an intermediate axle, and a trailing axle mounted on a trailer frame in longitudinally spaced relation and each having dual wheels on each of the opposite ends thereof for substantially equal weight distribution thereon. A longitudinally adjustable tongue structure has one end thereof pivotally connected to a leading end portion of the trailer frame for vertical swinging movement and the other end thereof adapted to be connected to a concrete mixing truck.

Abstract: An improved trailer jacking device and method. The device comprises a trailer tongue frame, an adjustable pivotal strut mounted medially of said frame, and caster and wheel provided with a lock at the lower end of the strut. To connect a vehicle to a trailer equipped with such device, the strut stands in a position back past vertical, holding the tongue and female hitch member at a predetermined height, and the vehicle above the elevation of the hitch ball is backed toward the trailer tongue. As the vehicle pushes the trailer tongue backward, the strut will pivot forward, lowering the female member on the ball hitch and removing the weight of the trailer tongue from the strut. The strut is then moved upward to stowage position, or removed for stowage in the vehicle.