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:
Mar. 07, 2000
Filed:
Apr. 26, 1999
Applicant:
Inventor:
Masahiro Uchida, Iwata, JP;
Assignee:
Yamaha Hatsudoki Kabushiki Kaisha, Iwata, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01C / ; F01L / ;
U.S. Cl.
CPC ...
123 9034 ; 1231933 ; 1231 / ;
Abstract
Two embodiments of VVT mechanisms for internal combustion engines. The VVT mechanisms are hydraulically operated by the engine lubricating oil through control passages formed in the forward-most bearing portion of the camshaft. However, spaced on both sides of these control passages, there are provided lubricant supplies to the forwardmost and rearward most ends of the forward bearing surfaces of the camshaft so as to provide good lubrication, particularly in the more highly loaded forwardmost portion thereof.