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:
Jul. 16, 2002
Filed:
May. 19, 2000
Applicant:
Inventors:
Terry M. Cadle, Wauwatosa, WI (US);
Carl J. Landgraf, Waukesha, WI (US);
Joel H. Mandel, Hartford, WI (US);
Assignee:
Zenith Sintered Products, Inc., Germantown, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22F 3/24 ;
U.S. Cl.
CPC ...
B22F 3/24 ;
Abstract
A sintered powder metal part is prepared for machining by injecting grease into the surface of the part to be machined to a depth at least equal to the depth of machining. The grease is injected under very high pressure using repressing tooling by applying a certain volume of grease between the surface to be machined and the mating tool surface and applying pressure sufficient to uniformly inject the grease into the surface. A rim may be formed in the part adjacent to the surface which acts as a seal during grease injection and is compressed into the part.