Patent ID: 6203265
Filing Date: 2001-03-20
Classification: A61G,B60P,B60R,F16H,Y10S,Y10T

Abstract:
A ramp assembly, comprising:a frame having a first pin;a ramp platform mounted in the frame and defining trailing and forward ends;a reciprocating mechanism for extending and retracting the ramp platform along a length of the frame between stowed and deployed positions, the ramp platform being arranged when deployed such that the forward end extends down toward the ground;a first lever having a distal end attached to the trailing end of the ramp platform, a second end rotatably attached to the reciprocating mechanism, the first lever configured to rotate about the second end as the reciprocating mechanism is extended, thereby lifting the trailing end of the ramp platform upward wherein the first pin is engaged by the first lever when the ramp platform is extended, thereby causing the first lever to rotate and lift the trailing end of the ramp platform; anda first bias spring having a first end attached to the lever so as to bias the trailing end of the ramp platform upward.