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:
Apr. 24, 2007
Filed:
Dec. 02, 2003
Applicants:
David Mark Pascoe, Newmarket, CA;
David Dorigo, Oakville, CA;
Cheng Mu, Toronto, CA;
Jianwen LI, Toronto, CA;
Inventors:
David Mark Pascoe, Newmarket, CA;
David Dorigo, Oakville, CA;
Cheng Mu, Toronto, CA;
Jianwen Li, Toronto, CA;
Assignee:
Tesma International Inc., Concord, Ontario, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21K 1/30 (2006.01); B23P 15/14 (2006.01); F16H 57/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method is disclosed for making a differential housing having a ring gear integrally formed therein. The method includes the steps of forging a conical frustum from a steel rod; deforming the frustum between upper and lower die halves of a tool to produce a differential housing having an annular rim; and forging a plurality of teeth in the annular rim defining the rim gear.