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:
Mar. 14, 2017
Filed:
Oct. 22, 2012
Applicant:
Christian Böhm, Frankfurt am Main, DE;
Inventor:
Christian Böhm, Frankfurt am Main, DE;
Assignee:
Contintental Automotive GmbH, Hannover, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04C 2/344 (2006.01); F04C 14/06 (2006.01); F04C 11/00 (2006.01); F01C 21/08 (2006.01); F04C 2/10 (2006.01);
U.S. Cl.
CPC ...
F04C 2/3446 (2013.01); F01C 21/0863 (2013.01); F04C 11/006 (2013.01); F04C 14/06 (2013.01); F04C 2/10 (2013.01);
Abstract
A pump device having a vane-type pump has a check valve in a fluid duct which leads from a pressure region to an under-vane region. The check valve blocks in the direction of the pressure region, preventing pressure from escaping from the under-vane region into the pressure region during the start-up of the vane-type pump.