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.:

US 8251031 B1

PDF
Full Text
Expired
Date of Patent:
Aug. 28, 2012

Filed:

Feb. 27, 2009
Applicants:

Yukihiro Tsubakino, Saitama, JP;

Shinsuke Yasui, Saitama, JP;

Isao Azumagakito, Saitama, JP;

Dai Koike, Saitama, JP;

Inventors:

Yukihiro Tsubakino, Saitama, JP;

Shinsuke Yasui, Saitama, JP;

Isao Azumagakito, Saitama, JP;

Dai Koike, Saitama, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01L 1/18 (2006.01);
U.S. Cl.
CPC ...
Abstract

In a four-cycle engine, the stiffness of a rocker shaft support portion is increased while avoiding an increase in the size of a cylinder head. The rocker shaft support portion that supports a rocker shaft is integrally formed on the cylinder head so as to be disposed between an engine valve and a camshaft as viewed from an axial direction of the camshaft and the rocker shaft. First reinforcement ribs are integrally disposed in a protruding condition on a plane orthogonal to an axis of a rocker shaft on a side face of rocker shaft support portions opposite a side of a camshaft.


Find Patent Forward Citations

Loading…