Patent ID: 8308185

Claim:
A pin-engaging drawbar and lock plate assembly for selectively immobilizing a drawbar having oppositely-disposed receiver pin openings, comprising: a pair of oppositely-disposed, vertically-elongated drawbar pin openings provided in said drawbar for selectively registering with said oppositely-disposed receiver pin openings in the receiver; a pin extending through said oppositely-disposed receiver pin openings and said pair of said oppositely-disposed, vertically-elongated drawbar openings; a lock plate movably disposed in said drawbar and an angle brace fixed to said lock plate for engaging said pin; a draw bolt engaging said lock plate and said drawbar for selectively moving said lock plate and tightening said angle brace against the pin in said drawbar and forcing the drawbar against the receiver responsive to manipulation of said draw bolt; wherein the drawbar has a top side and a bottom side therein and wherein said lock plate has a substantially flat bottom slidably disposed on said bottom side of the drawbar.