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. 04, 2009
Filed:
Jan. 08, 2007
Akira Fujiwara, Saitama, JP;
Morinobu Kawamura, Saitama, JP;
Akira Fujiwara, Saitama, JP;
Morinobu Kawamura, Saitama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A pin is relatively rotatably fitted into a pin hole formed in an outer link plate of a chain. A plurality of helical grooves are formed on an outer circumferential surface of the pin. A pitch P between adjacent helical grooves in the axial direction is equal to or less than a width in the axial direction of the pin hole of the outer link plate. At least one helical groove is arranged to oppose an arbitrary generatrix on an inner circumferential surface of the pin hole. Also, when a radius of the pin is R and a relative rotation angle with the mating member is θ, a pitch P' in the circumferential direction between adjacent helical grooves is Rθ or less. Thus, at least one helical groove is arranged to always pass each position in a sliding range between the pin and the pin hole.