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:
Mar. 02, 1999
Filed:
May. 30, 1997
Industrial Technology Research Institute, Taiwan, CN;
Abstract
A bicycle sprocket set is composed of a small sprocket and a large sprocket coaxial with the small sprocket. The large sprocket is provided with an axially oriented recess in the bottom portion located between the first tooth and the second tooth of the large sprocket. The recess has a support curved face extending from the second tooth. The large sprocket is further provided with a support protrusion located under the support curved face such that the support protrusion is separated from the support curved face by a distance corresponding to about one tooth pitch. The support curved face and the support protrusion serve to support the inner and the outer chain plates of a drive chain at such time when the gearshifting takes place.