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. 22, 2005
Filed:
Sep. 24, 2003
Hirokazu Matsuura, Aki-gun, JP;
Kouji Asanomi, Aki-gun, JP;
Toshiaki Nishimoto, Aki-gun, JP;
Taketoshi Yamauchi, Aki-gun, JP;
Hirokazu Matsuura, Aki-gun, JP;
Kouji Asanomi, Aki-gun, JP;
Toshiaki Nishimoto, Aki-gun, JP;
Taketoshi Yamauchi, Aki-gun, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A valve driving device including a tappet assembly adapted to slide in a tappet guide hole to drive a valve and including a high-speed center tappet and low-speed side tappet; and a high-speed center cam and a low-speed side cam provided corresponding to the center tappet and the side tappet. A depression is formed which is depressed from a base circle to roughly the same profile as a shaft section of the camshaft so that the cam portion over a predetermined angle range where a cam nose section is not formed in the centrally located center cam is smaller than the base circles of the outside located side cams in profile.