US 5,040,817 AGranted

Trailer hitch assembly

OwnerRichard P. Dunninventor

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Abstract

An improved trailer hitch assembly to be attached to a drawbar for towing a trailer, the assembly including an upright elongated hitch post threaded at the lower end by which it is attached to a drawbar, the upper end being of cylindrical external configuration and the post having a central passageway therein communicating with the bottom end, a grease fitting threadably received in an opening in the bottom end communicating with the passageway and the upper end of the passageway communicating with the external cylinder surface, and a ball having an opening therethrough rotatably received on the hitch post and a keeper ring secured to the upper end of the hitch post to retain the ball in position, grease being deposited from the grease fitting through the passageway to lubricate the cylindrical surface between the hitch post and the ball.

Claims7

Dependent claims

An improved trailer hitch assembly adapted to be attached to a drawbar for towing a trailer, the drawbar having an opening therethrough, the assembly comprising:

an upstanding elongated hitch post having an upper and a lower end and having threads adjacent said lower end, the lower end being receivable in an opening in a drawbar;
means to retain said hitch post securely uprightly from a drawbar, said hitch post having a portion at said upper end of cylindrical external configuration having a cylindrical external surface, the hitch post having a passageway therein communicating between one of said hitch post ends and said post external cylindrical surface;
a grease fitting means received in said passageway in said hitch post at one of said hitch post ends providing means for conveying grease through said passageway;
a ball having an opening therethrough dimensioned to rotatably receive said hitch post portion having said external cylindrical surface, the ball being rotatably received on said hitch post;
and
means of removably retaining said ball on said portion of said hitch post having said cylindrical surface.

3 more elements

Dependencies are inferred from the claim text.