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:
May. 23, 1989
Filed:
Apr. 27, 1987
Applicant:
Inventors:
Chester G DuBois, Zion, IL (US);
David F Haman, Waukegan, IL (US);
Assignee:
Outboard Marine Corporation, Waukegan, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F01M / ;
U.S. Cl.
CPC ...
1231 / ; 1231 / ; 92156 ; 92159 ; 184-65 ;
Abstract
A wrist pin lubricating system for a multi-cylinder two-cycle engine comprises a passage system for collecting and distributing crankcase condensate to the piston wrist pin bearings. A slot in each piston skirt provides continuous communication between each wrist pin bearing and a passage in the cylinder wall delivering condensate from the engine crankcases. The condensate is collected at the low point of each crankcase and is pumped to the wrist pin bearings by the pressure differential between two crankcases. Check valves are provided in the passages to maintain a directional flow of the condensate.