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:
Jul. 23, 1991
Filed:
Jul. 02, 1990
Applicant:
Inventors:
Assignee:
Mazda Motor Corporation, Hiroshima, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01L / ;
U.S. Cl.
CPC ...
123 9027 ; 1231 / ;
Abstract
A valve drive apparatus comprises a pair of valve trains, each having a rocker arm and a hydraulic lash adjuster, arranged symmetrically with respect to a center axis of each cylinder of a double overhead camshaft engine. Either one of the pair of valve trains that has a rocker arm leverage greater than a rocker arm leverage of the other of the pair of valve trains is adapted and designed so as to have a structural rigidity higher than the structural rigidity of the other.