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. 05, 1978
Filed:
Sep. 09, 1977
Alfred C Vennemeyer, Vandalia, OH (US);
Richard A Ernst, Dayton, OH (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An improved method is disclosed for making spur gears having teeth with axially crowned working faces. A sintered powdered metal compact is formed in the shape of the desired gear, but slightly oversized and preferably with gear teeth having working faces that are uncrowned in the direction parallel to axis of rotation of the gear. The compact is forced into a smooth circular die cavity having a diameter slightly less than the outer diameter of the compact. Only the tips of the gear teeth engage the die wall. While the compact is constrained within the die, axial compressing forces are applied to it and gear teeth having axially crowned working faces are produced. At the same time, the gear is finish sized to desired dimensions.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile