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:
Sep. 20, 2016
Filed:
Sep. 19, 2014
Vp Components Co., Ltd., Taichung, TW;
Wen-Hwa Lin, Taichung, TW;
VP COMPONENTS CO., LTD, Taichung, TW;
Abstract
The present invention provides a chain wheel assembly and chain wheel device using it, wherein the chain wheel device includes a driver, a switching sleeve, plural chain wheels with different diameter sizes, plural connectors, and a fastener. Therein, the driver is connected to a wheel hub of a back wheel of a bicycle for transmitting a torque. One end of the switching sleeve is screwed to the driver. The chain wheels, axially stacked from the largest one to the smallest one, are disposed in a direction from the driver toward the switching sleeve, with sprockets disposed on the periphery of each chain wheel, respectively, for optionally engaging chain. The ring-shaped connectors are coupled between each two of the chain wheels, respectively. The fastener is screwed to the other end of the switching sleeve for axially fixing the switching sleeve.