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:
Nov. 28, 1989
Filed:
May. 10, 1988
Fred Blankenhagen, Penzberg, DE;
Hermann Putz, Schongau, DE;
Enfo Grundlagenforschungs AG, Dottingen, CH;
Abstract
A friction or rubbing element for clutches, brakes, bearings or the like consists of a metal ring element with at least one uneven friction or rubbing surface which is substantially rotationally symmetrical about the ring axis and comprises a spray-sintered lining directly sintered thereon. To produce this lining the ring element is arranged in a level position together with a sinter mould disposed substantially concentrically to the side of the friction or rubbing surface in such a manner as to maintain an annular gap. After filling the annular gap with sinter powder, the complete assembly is heated to sintering temperature. The sinter mould material has a coefficient of thermal expansion which in the case of an internal sinter mould is greater than and in the case of an external sinter mould is less than that of the ring element, pressure being applied during sintering by virtue of the different temperature expansion.