Abstract: A method and apparatus for lowering and raising the floor bed of a transport trailer to facilitate loading and unloading, the transport trailer having at least one pair of wheels mounted on a swing arm, the swing arm connected to a transverse axle, the transverse axle having mounted thereon a first quarter bevel gear in communication with a worm drive gear combination for raising and lowering the swing arms and thus raising or lowering the trailer bed, there being at least one second quarter bevel gear and worm drive gear combination in communication with a motor and a V-shaped yoke, the worm gears being mounted on a common shaft extending from the motor rearwardly to a manual coupling which would permit the manual lowering and raising of the trailer bed in the absence of motor power.

Abstract: An improved peristaltic pump whereby the elastomeric tubing communicates with the peristaltic pump in a way that allows for axial movement of the tubing thereby extending the flex life of the pump tubing. A tubing element is fitted with a flange that allows tension to be applied to the tubing in a way that changes depending upon the location of the rotor at any given time. The tension can be applied via an elastic material located between the flange and the housing or between the housing and a device that communicates with the flange. The dynamic tension reduces the amount of stress on the tubing material when the rollers first engage the tubing on the suction side of the pump and when they depart the tubing on the discharge side of the pump. The invention is particularly useful for materials that have limited axial flexibility and for those with very large axial flexibility.

Abstract: A vehicle mounted filter assembly for entrapment of air pollutants, the filter assembly including a bracket mounted to the vehicle forward of the radiator assembly, or behind the radiator, the bracket having two opposed vertical channels for the slidable receipt of a filter assembly having a filter medium of charcoal, gauze or ionic attraction, the filter being slidably removable from the bracket for discard and a new filter inserted, this interchange occurring on a regular service basis.

Abstract: A valve seal for a rotary valve assembly for use in an internal combustion engine of the piston and cylinder type, wherein the cylinder head/combustion chamber is designed for high compression and of long stroke, such as a diesel engine, the rotary valves and the valve seals being positioned in relationship so as to permit charging of the cylinder with a fuel/air mixture and evacuation of spent gases, and to regulate the pressure within the valve seal and valve seat and hence regulate the pressure between the valve seal and the rotary valve.