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. 30, 1985
Filed:
Aug. 24, 1983
Applicant:
Inventors:
Rainer Sudbeck, Wassenberg, DE;
Hans Baumgartner, Viersen, DE;
Manfred Brandstadter, Dusseldorf, DE;
Assignee:
Pierburg GmbH & Co KG, Neuss, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04C / ;
U.S. Cl.
CPC ...
418 59 ; 418-6 ;
Abstract
A positive displacement rotary gas compressor pump comprising a ring piston having an annular wall with a gap forming confronting inlet and outlet ends, the outlet end, during the compression of the gas in the inner and/or outer pumping chambers, cooperating with a bridging wall portion joining two concentric cylinder walls, or with the end of the inner cylinder wall near its transfer port, so that the gas is compressed before being discharged from the pump.