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.

Date of Patent:
Apr. 14, 1981

Filed:

May. 25, 1978
Applicant:
Inventors:

Masaki Watanabe, Niiza, JP;

Goroei Wakatsuki, Fujimi, JP;

Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16H / ; F16H / ;
U.S. Cl.
CPC ...
474156 ; 474151 ; 474161 ;
Abstract

A chain noise preventing device wherein a cushioning ring, having an outside diameter larger than that of a semicircular inscribed circle of chain formed when the chain meshes with a sprocket, is arranged on at least one side surface of the sprocket.


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