Abstract: An air driven actuator (100) uses oppositely disposed reciprocating air drivers (122, 124) to cause a single ratchet (146) to rotate via a drive plate (150) and a pawl (170). The ratchet (146) rotates a drive tube (144) that can further extend or retract landing gear on a semi-trailer.

Abstract: An air driven actuator (100) uses oppositely disposed reciprocating air drivers (122, 124) to cause a single ratchet (146) to rotate via a drive plate (150) and a pawl (170). The ratchet (146) rotates a drive tube (144) that can further extend or retract landing gear on a semi-trailer.

Abstract: A vehicle suspension assembly that includes first and second main beams each having a first end operably coupled to a vehicle frame, and a second end having a cavity formed therein, and first and second extension members each having an aperture extending therethrough, wherein the first and second extensions are interference-fit within and extend outwardly from the cavity of the first and second main beams, respectively. The assembly further including a torsion member having apertured first and second ends that receive the first and second extension members therein, and threaded mechanical fasteners extending through the apertures of the first and second extension members and engage nuts that are frictionally engaged by the first and second main beams.

Abstract: A height control valve is preferably adapted to be mounted in a trailing arm suspension and fluidly interconnected to a source of pressurized air and to an air spring. The height control valve comprises a housing having a cylindrical bore, a supply port, an exhaust port and an air spring port each of which extends through the housing and fluidly communicates with the bore. A rotor is preferably rotatably mounted in the bore and interconnected to the arm wherein pivotal movement of the arm rotates the rotor with respect to the housing between first, second and third rotational positions.

Abstract: A height control valve is preferably adapted to be mounted in a trailing arm suspension and fluidly interconnected to a source of pressurized air and to an air spring. The height control valve comprises a housing having a cylindrical bore, a supply port, an exhaust port and an air spring port each of which extends through the housing and fluidly communicates with the bore. A rotor is preferably rotatably mounted in the bore and interconnected to the arm wherein pivotal movement of the arm rotates the rotor with respect to the housing between first, second and third rotational positions.

Abstract: A vibration dampening assembly and a suspension system for use, for example, between a cab and a flame of a truck, has a link with a first end pivotably interconnected with a second plate at a first support pivot, a lever with a first end pivotably interconnected with the second end of the link at a link pivot, a shock absorber, the first end of which is pivotably interconnected with the lever second end at a shock pivot and the second end of which is pivotably interconnected to a first or the second plate at a second pivot support spaced from the first support pivot wherein the lever is pivotably interconnected with the first plate at a main pivot connection located intermediate the first and second ends thereof. In one embodiment, the shock absorber central axis and the lever longitudinal axis are parallel when the supporting body and the suspended body are in a static condition.

Abstract: A vehicle cab suspension unit has a foundation which is secured to an outer rail of the frame of the vehicle and pivotally connects one end of a track arm. The other end of the track arm is supported above the foundation by an air spring, and a cab support yoke is pivotally connected between the ends of the track arm so as to support and secure the cab at a position along the track arm between its ends. Shock absorbers are provided between the foundation and the cab support yoke on both sides of the track arm. A height control valve maintains the height of the suspension unit and elastomeric snubbers on the foundation provide limits to the range of travel of the unit.