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:
Dec. 02, 2008
Filed:
Feb. 27, 2007
Masaki Yoneyama, Saitama, JP;
Naoki Kono, Saitama, JP;
Kohji Minami, Saitama, JP;
Fumiaki Okubo, Saitama, JP;
Hiroshi Kuribara, Saitama, JP;
Masaki Yoneyama, Saitama, JP;
Naoki Kono, Saitama, JP;
Kohji Minami, Saitama, JP;
Fumiaki Okubo, Saitama, JP;
Hiroshi Kuribara, Saitama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
An internal combustion engine is provided with a crankcase partitioned into an upper section and a lower section. A fastening bolt is provided for fastening the upper and lower crankcase sections together in the vicinity of a crankshaft. A bolt hole is formed in the crankcase, and the fastening bolt is inserted and tightened in the bolt hole. An opening is formed at an end of the bolt hole within the upper crankcase, the end of the bolt hole is made to communicate with this opening, and the end of the fastening bolt protrudes into the opening when the engine is assembled, to lighten the crankcase, and in order to avoid concentrating stress in the bolt hole near the end of the bolt.