Patent ID: 6729826
Filing Date: 2004-05-04
Classification: B66F

Abstract:
A ramp for at least partially elevating a wheeled vehicle, comprising:a generally planar upper deck having a sloped platform and a generally horizontal platform; a generally planar horizontally disposed base, having first and second ends; at least one elongated support operatively connecting said base to said upper deck; and a wheel assembly, comprising at least a generally elongated lever having first and second end portions, a generally helically-shaped spring, an axle, and at least one wheel; said first end portion of said lever being operatively pivotably connected to said at least one elongated support said axle being operatively rotatably secured to said lever proximal the second end portion thereof; said spring being operatively coupled to said lever and said upper deck; said wheel assembly being adapted to extend and retract said at least one wheel with respect to said base; said wheel assembly being positioned with respect to said upper deck and said base to retract in a substantially upward direction to a position generally intermediate said upper deck and said base in response to said vehicle being at least partially wheeled onto the sloped platform of said upper deck.