The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 30, 1993
Filed:
Dec. 23, 1991
Philip D Arnold, Mt. Clemens, MI (US);
John P Walsh, Farmington Hills, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A crankshaft for a two stroke engine requiring a seal disc on each crank pin is formed by forging, machining and heat treating without a seal disc and then applying a two part seal disc to each crank pin. The two parts of the seal disc have a mating interface in line with the center of the crank pin and a semi-circular recess in each part surrounds half of the crank pin. The parts are dimensioned to effect an interference fit on the crank pin when assembled with sufficient force. The parts are secured together by laser welding, bolts or by adhesive bonding. In the case of welding, the parts are assembled with dowels normal to the interface to maintain the proper alignment during welding and to reinforce the strength of the final assembly.