Abstract: A fifth wheel assembly safety coupling arrangement includes a fifth wheel hitch including a top support surface and a recess configured to receive a kingpin member therein, a locking arrangement moveable between a locked position, wherein the kingpin is prevented from being removed from within the recess by the locking arrangement, and an unlocked position, wherein the kingpin is not prevented from being removed from within the recess by the locking arrangement, and a pneumatic cylinder assembly configured to receive a first pneumatic input from a first air supply exerting a first force on the pneumatic cylinder assembly, and a second pneumatic input from a second air supply exerting a second force on the pneumatic cylinder assembly, wherein the pneumatic cylinder assembly prevents the locking arrangement from moving from the locked position to the unlocked position when the sum of the biasing force and the first force is greater than the second force.

Abstract: The present invention relates to a coupling apparatus for the pivoted coupling of a vehicle having two vehicle sections, with coupling elements which are arranged to pivot towards each other, and which can be permanently coupled to a vehicle section. A brake arrangement operates between the coupling elements and forms an adjustable frictional grip between the coupling elements, which blocks the ability of the vehicle sections to pivot toward each other. In addition, the brake apparatus includes a hydraulic cylinder unit which operates on multiple radially acting brake elements.

Abstract: A rotational jack assembly is provided to support a portion of a trailer. The jack assembly has a pivot mount with a pivot axis, a mounting plate rotatable about the pivot axis and a pin receptor with a first and second portion. The mounting plate carries a support assembly and a locking pin. The locking pin is engagable with the pin receptor, and adapted to move between the first and second portions of the pin receptor upon application of rotational force. A force activated locking assembly and a breakaway support assembly are also provided for supporting a portion of a trailer. A method of use for the rotational breakaway trailer jack assembly is also disclosed.

Abstract: A steering gear pinion bearing assembly adapted to support a pinion in a rack and pinion steering apparatus comprises a pinion support member including a first end, a second end and a stepped body portion; and a bearing assembly carried by the pinion support member, the bearing assembly including at least a plurality of bearings and an outer race.

Abstract: A system for monitoring the coupling of a tractor to a trailer of an articulated road vehicle, the tractor mounting a hitch assembly (7) for coupling to a king pin (9) downwardly depending from the underside of the trailer (10), comprises a sensor (14) producing an electrical signal proportional to the vertical distance between the hitch assembly and the underside of the trailer, and indicator means (16) connected to the sensor for providing an indication of the vertical distance.

Abstract: A recreational vehicle is made up of a pickup truck, a camper which is releasably mounted on the pickup truck and includes an accessway between the cab of the pickup truck and the camper, and a trailer which communicates with the camper through an articulated passage or walkway to permit movement of occupants between the camper and trailer while the vehicle is in motion.

Abstract: An auxiliary back-up and trailer coupling device for motor vehicles includes ultrasonic sensors mounted on the motor vehicle. The ultrasonic sensors transmit and receive sound waves, and are linked to a control and display device. The device permits the position of a trailer unit that is equipped with a coupling device and arranged behind the motor vehicle to be exactly determined. The trailer is equipped with a coupling device, preferably a tow bar, and has an additional transmitting and receiving ultrasonic sensor.

Abstract: A system for temporarily releasing spring actuated emergency brakes on semi-trailers without the necessity for the operator to leave the cab of the tractor for movement within marshalling yards comprises an air receiving valve centrally positioned at the front of the trailer a specific distance from the kingpin and connected to the emergency air system through a valve which seals the gladhand when the system is in use, an air injection probe extendibly mounted on a trolley which travels on an arcuate track mounted below and ahead of the fifth wheel of the tractor such that the probe travels in an arc at a distance from the center of the fifth wheel equal to that between the receiving valve and the king pin, a sensing switch for sensing alignment of the injector probe with the receiving valve, a drive mechanism for moving the trolley to align the injector probe and receiving valve, an air actuated cylinder for extending and retracting the injector probe to make and break contact with the receiving valve, a sol

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 system for raising and lowering an auxiliary retractable wheel train of a truck trailer to permit neutralizing the braking mechanism of the wheels of the auxiliary train when the latter rises. A selection valve for rising and falling of the auxiliary retractible wheel train cooperates with a relay slide valve which, according to whether it is opened or closed, allows or cuts off the flow of braking fluid in the piping across which relay valve is mounted.