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:
May. 25, 1999
Filed:
Aug. 29, 1997
Applicant:
Inventor:
Tateo Aoyama, Iwata, JP;
Assignee:
Yamaha Hatsudoki Kabushiki Kaisha, Iwata, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02B / ;
U.S. Cl.
CPC ...
123432 ; 123 9048 ;
Abstract
A five valve per cylinder twin overhead cam internal combustion engine wherein the valve placement is such that the cam shafts may be located so as to directly operate the valves and still provide threaded fastener attachments that can be tightened when the cam shaft is in place. The placement of the valves and the size of their actuating tappets is such to maintain optimum strength and durability while maintaining a compact construction.