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:
Jan. 31, 2012
Filed:
Feb. 27, 2009
Hiroshi Kuribara, Saitama, JP;
Mitsuyoshi Kamiya, Saitama, JP;
Shingo Ueda, Saitama, JP;
Sumiko Fukuzawa, Saitama, JP;
Hiroshi Kuribara, Saitama, JP;
Mitsuyoshi Kamiya, Saitama, JP;
Shingo Ueda, Saitama, JP;
Sumiko Fukuzawa, Saitama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A bolt fastening structure for an internal combustion engine includes bolt fitting holes formed in a cylinder of the engine. An inner wall of a top portion of a crankcase includes boss portions having openings, as an extension to the corresponding bolt fitting holes, with internal threads formed therein. The crankcase further includes hollow recesses formed thereon between the boss portions and crankshaft rotational support portions. Fastening bolts, each having an external thread formed at a tip portion thereof, are extended through the bolt fitting holes, and engaged with the internal threads of the boss portion. The hollow recesses include portions of the openings of the boss portions having the internal threads opened therein.