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. 12, 1977
Filed:
Jul. 15, 1975
Applicant:
Inventors:
Wulf Leitermann, Bad Wimpfen, DT;
Hans-Georg Zimmermann, Heilbronn, DT;
Assignees:
Audi NSU Auto Union Aktiengesellschaft, Neckarsulm, DT;
Wankel GmbH, Lindau Bodensee, DT;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23P / ;
U.S. Cl.
CPC ...
291566 ; 418178 ; 277 / ;
Abstract
A method of manufacturing arcuate sealing strips for the pistons of rotary piston machines. The running surface on one face of the strip carries a wear-resistant hard layer.