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:
Feb. 13, 2001
Filed:
Oct. 25, 1999
Applicant:
Inventor:
Minoru Yonezawa, Iwata, JP;
Assignee:
Yamaha Hatsudoki Kabushiki Kaisha, Iwata, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01L 1/344 ;
U.S. Cl.
CPC ...
F01L 1/344 ;
Abstract
An improved variable valve timing mechanism for an internal combustion engine wherein the variable valve timing mechanism includes a control valve mounted by a bearing cap for the cam shaft and specifically one end of the cam shaft. The bearing cap is fastened to the cylinder head by threaded fasteners that are disposed on opposite sides of a bearing surfaces a cam shaft in which at least one oil control groove is formed. Oil is supplied to this control groove by a valve element that is mounted in the bearing cap in spaced relation to the threaded fasteners.