Patent ID: 7296817

Claim:
A fifth wheel assembly comprising: a. a frame composed of two parallel slide plates, each of said two slide plates having two ends; b. two tie bars for holding said slide plates in parallel, said at least two tie bars having ends, said tie bar ends having top surfaces, said top surfaces affixed to under sides of said slide plates ends; and c. four stop blocks, each of said stop blocks consisting essentially of: a generally rectangular solid member having a generally rectangular double curved longitudinal cross-section dividing said member into a long portion and a short portion whereby said long portion of said member is higher in elevation than said short portion of said member, wherein each of said four stop blocks is affixed to said assembly proximal to each end of each said slide plate by affixing each said long portion to the end of each said slide plate and said short portion to the top surface of the associated tie bar affixed to said slide plate.