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:
Oct. 13, 1981
Filed:
Jul. 19, 1979
Seiji Fukui, Sakai, JP;
Shimano Industrial Company, Limited, Osaka, JP;
Abstract
A two stage transmission hub for a bicycle is disclosed in which one of the hub end portions located at both axial ends of a hub body is extended axially outwardly of a hub flange to form a cylindrical extension integrated with the end portion; transmitting pawls are supported to the cylindrical extension; a sun gear is provided at a hub shaft positioned axially outwardly of the cylindrical extension; a gear frame having a planetary pinion in mesh with the sun gear is rotatably supported to the hub shaft and is arranged axially in series to the cylindrical extension; a cylindrical driving member which covers the outer peripheries of the cylindrical extension and gear frame is rotatably supported to the hub shaft and has at an inner periphery ratchet teeth in mesh with the transmitting pawls and inner teeth in mesh with the planetary pinions, and has at the outer periphery at least one sprocket; and a control member is provided to control the transmitting pawls; so that the driving force from the sprocket is speed-changed at two stages and transmitted to the hub body through the cylindrical extension.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile