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:
Aug. 26, 1997
Filed:
Jan. 21, 1994
Applicant:
Inventor:
Gerhard Plamper, Valley City, OH (US);
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
B21D / ; B21B / ;
U.S. Cl.
CPC ...
2989332 ; 72 98 ;
Abstract
A method includes the steps of compacting powder metal to form a powder metal blank, and forming gear teeth on the powder metal blank by rolling the powder metal blank between rolling dies rotating about parallel axes. The step of forming gear teeth on the powder metal blank by rolling includes the steps of rotating the rolling dies about parallel axes and maintaining the distance between the parallel axes constant during forming of the gear teeth on the powder metal blank. Powder metal gears having 45.degree. helical gear teeth are cold rolled. Herringbone gears and pinion gears are made with the 45.degree. helical powder metal gears.