Abstract:
The assembly is mounted on the tilt cab by base 136 and latches to the chassis by latch 20. Air bag 166 can be filled and emptied by conduit 168. Piston rod 148 coupled by universal joint 174 to base 136 carries piston 156 in damping cylinder 150. Fluid flows between cylinder 150 and reservoir 160 by multiple passages 162 and 164 at opposite ends of the cylinder and a one-way valve 176 controls flow through the piston. Numerous variants are described for use at front and rear of the cab including one-way valves and adjustable orifices controlling flow between the cylinder and the reservoir and flow through a by-pass connecting the ends of the cylinder. The reservoir may be separate. To lock the piston in the down position after deflating the bag a selectively operable valve is provided between the upper part of the cylinder and the reservoir.