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:
Feb. 11, 2014

Filed:

Oct. 20, 2010
Applicants:

Yosuke Tanaka, Saitama, JP;

Yasuo Shimizu, Saitama, JP;

Atsuhiko Yoneda, Saitama, JP;

Inventors:

Yosuke Tanaka, Saitama, JP;

Yasuo Shimizu, Saitama, JP;

Atsuhiko Yoneda, Saitama, JP;

Assignee:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16H 55/12 (2006.01);
U.S. Cl.
CPC ...
Abstract

Provided is a worm wheel that allows the residual stress in the plastic gear forming member thereof to be reduced, and suited for compact design. The worm wheel comprises a metallic core member () and a plastic gear forming member () formed on an outer periphery of the core member. In particular, the core member includes a boss portion () defining a pivot portion, an intermediate portion () extending radially from the outer periphery of the boss portion, and a cylindrical portion () connected to a radially outer end of the intermediate portion and having the gear forming member molded thereon coaxially with the boss, the cylindrical portion being formed with through holes () or cutouts () passed radially therethrough.


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