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:
Aug. 17, 2010
Filed:
Oct. 29, 2007
Takashi Nakagawa, Osaka, JP;
Hiroki Ishida, Osaka, JP;
Toshihiko Aoki, Osaka, JP;
Hirofumi Miki, Osaka, JP;
Takashi Nakagawa, Osaka, JP;
Hiroki Ishida, Osaka, JP;
Toshihiko Aoki, Osaka, JP;
Hirofumi Miki, Osaka, JP;
Tsubakimoto Chain Co., Osaka, JP;
Abstract
An oil-free chain has bushings which protrude from the outer surfaces of the inner link plates into which they are press-fit, and extend into bushing supporting bores formed in the inner surfaces of the outer link plates of the chain. These bushing supporting bores are formed by a pressing operation which produces offsets in portions of the outer plate, so that, as the bushing supporting bores are formed in the inner surfaces of the outer plates, bosses are simultaneously formed on the outer surfaces. The connecting pins of the chain are press-fit into pin holes in these bosses. The bushing supporting bores are formed without removal of material by machining, and therefore the strength of the outer plates is not compromised.