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. 04, 1989
Filed:
Aug. 31, 1987
Applicant:
Inventors:
Robert G Alexander, Ann Arbor, MI (US);
George C Pratt, Ann Arbor, MI (US);
Assignee:
Federal-Mogul Corporation, Southfield, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B22F / ;
U.S. Cl.
CPC ...
428561 ; 384912 ; 252 12 ; 420474 ; 428553 ; 428677 ; 419-8 ; 419-9 ; 419 23 ; 419 28 ; 419 29 ; 419 55 ; 419 57 ; 148 132 ; 1481261 ; 148127 ; 148433 ;
Abstract
A process for making a composite bearing material comprising a steel backed, prealloyed, lead-bronze sintered powder metal matrix whereby the first sinter step includes induction heating the prealloyed powder and steel backing to above 650.degree. C. and thereafter sintering the same at temperatures of about 850.degree. C. in a second sintering furnace. A composite bearing material made by the same process and comprising a lead particle size averaging less than about 8 microns and having no lead islands larger than about 44 microns.