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:
Mar. 20, 2012
Filed:
Oct. 23, 2008
Takeshi Kondo, Osaka, JP;
Toshihiko Takashima, Osaka, JP;
Ikutaro Nakagawa, Osaka, JP;
Takahisa Andoh, Osaka, JP;
Masahide Komeda, Osaka, JP;
Takeshi Kondo, Osaka, JP;
Toshihiko Takashima, Osaka, JP;
Ikutaro Nakagawa, Osaka, JP;
Takahisa Andoh, Osaka, JP;
Masahide Komeda, Osaka, JP;
Tsubakimoto Chain Co., Osaka, JP;
Abstract
The oil-free chain is obtained by connecting a pair of inner link plates which are connected by oil-impregnated bushings and a pair of outer link plates, which are connected by pins inserted into adjacent oil-impregnated bushings of adjacent inner link plates alternately. The oil-impregnated bushing is obtained by impregnating a bushing made of a metal sintered body with perfluoropolyether having a kinematic viscosity at 40° C. equal to or higher than 350 mm/s. The bushing is impregnated with perfluoropolyether having a kinematic viscosity corresponding to the operating temperature of the oil-free chain.