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:
Apr. 07, 1981
Filed:
Dec. 08, 1978
Applicant:
Inventor:
Tadashi Ueno, Sakai, JP;
Assignee:
Shimano Industrial Company, Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05G / ;
U.S. Cl.
CPC ...
745942 ; 474160 ;
Abstract
A multi-stage gear crank for a bicycle has chain detaching means facilitating disengagement of a driving chain from the teeth of sprockets, the detaching means being provided at teeth positioned in the vicinity of the upper and lower dead points of a larger diameter sprocket corresponding to the crank arms respectively, whereby the chain is adapted to be switched to a smaller diameter sprocket from the larger diameter sprocket at the upper dead point thereof.
Ueno, Tadashi. (1981). Multi-stage gear crank for a bicycle (U.S. Patent No. 4259880). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4259880
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile