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:
May. 16, 1978
Filed:
Nov. 26, 1976
Applicant:
Inventor:
Takashi Segawa, Sakai, JA;
Assignee:
Shimano Industrial Company Limited, Osaka, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H / ; F16D / ;
U.S. Cl.
CPC ...
7421 / ; 192 64 ;
Abstract
A multistage freewheel for a bicycle, comprising a plurality of at least two or more sprockets which are rotatably and axially movably supported to a cylindrical support, each of which sprockets is individually applied with rotary resistance. When a driving chain is shifted by a derailleur the rotary resistance is increased following the chain's shifting motion and the rotary resistance is less at the single sprocket, thereby securing safety in the bicycle operation.
Segawa, Takashi. (1978). Multistage freewheel for bicycles (U.S. Patent No. 4089231). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4089231
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile