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:
Dec. 21, 2010
Filed:
Aug. 23, 2007
Applicant:
Gary L. Anderson, St. Marys, PA (US);
Inventor:
Gary L. Anderson, St. Marys, PA (US);
Assignee:
Keystone Investment Corporation, Wilmington, DE (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B22F 3/17 (2006.01); B22F 5/08 (2006.01); B23P 15/14 (2006.01); B32B 15/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a low cost technique for manufacturing dual helical gears, such as herringbone gears, from powder metals. The dual helical gears made by this technique are of high density (greater than 92% of theoretical density) and offer superior strength. The present invention more specifically discloses a forged metal herringbone gear which is comprised of a body and a plurality of teeth wherein the metal has a density of greater than 92% of theoretical and wherein the grain in the teeth is one range higher on the ASTM E 112 grain size chart than the grain in the body of the gear.