Abstract: A flip-over ramp assembly is normally stowed in a horizontal position in a recess in a vehicle floor, and can be pivoted upward and outwards to a downward sloping deployed position, after the vehicle door has been opened. The flip-over ramp assembly comprises a mounting enclosure and a ramp which are pivotably connected at their adjacent edges by a hinge which provides a horizontal axis for movement of the ramp between deployed and stowed positions. A driving mechanism comprises an actuator and a driving shaft which is rotatably connected to the actuator. A pair of linkage assemblies are connected to the driving shaft, where the actuator drives the driving shaft which in turn moves the linkage assemblies to lift the ramp to the stowed or deployed position. A positioning cam rotates with the driving shaft for indicating the position of the ramp.

Abstract: An improved safety barrier/ramp actuation mechanism for combination folding stair and platform wheelchair lifts which translate from one configuration to the other depending upon the purpose to be served and have a combination safety barrier/ramp at the outboard end of the platform, the mechanism comprising a triple link mechanism and internally contained piston and bellcrank for reciprocating said barrier/ramp, and a pressure relief for said system to prevent raising said barrier/ramp when a load is resting thereon in ramp position, and the invention includes new steps in the method of operation of the stair and lift combination to enhance the safety thereof.

Abstract: A combination folding stair and platform wheelchair lift which translates from one configuration to the other depending upon the purpose to be served utilizing a series of panels which form a flat platform or alternatively steps and risers and which reciprocate horizontally on a pair of side rails and which are raised and lowered vertically in a pair of side column frames by a pair of hydraulically driven endless chains.