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:
Jun. 29, 1999
Filed:
Feb. 18, 1998
Applicant:
Inventors:
Takahiro Suzuki, Iwata, JP;
Takeo Yoshida, Iwata, JP;
Assignee:
Yamaha Hatsudoki Kabushiki Kaisha, Iwata, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01M / ;
U.S. Cl.
CPC ...
1231 / ; 1231 / ;
Abstract
An arrangement for lubricating the piston pin and associated bearing surfaces in a reciprocating machine wherein a charge is compressed in a crankcase chamber. The arrangement includes a groove in the cooperating bearing surfaces in which lubricant is retained. The opposite ends of the groove are exposed to different pressure areas in the engine that vary cyclically, but not in phase with each other so lubricant will be pumped back and forth in the groove during the cyclic engine operation.