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:
Aug. 26, 2014
Filed:
Nov. 08, 2012
Schwäbische Hüttenwerke Automotive Gmbh, Aalen-Wasseralfingen, DE;
Jürgen Ebinger, Ochsenhausen, DE;
Michael Ehringer, Bad Schussenried, DE;
Kim Boris Friedrich, Ilshofen-Gaugshausen, DE;
Stefan Küchle, Biberach, DE;
Boris Memel, Bad Schussenried, DE;
Sven Peters, Bad Schussenried, DE;
Lothar Preisler, Bad Schussenried, DE;
Anton Schmid, Ummendorf, DE;
Klaus Wiggenhauser, Ostrach, DE;
Schwabische Huttenwerke Automotive GmbH, Aalen-Wasseralfingen, DE;
Abstract
A rotary pump with an improved seal on a control pressure chamber, including: a housing having a delivery chamber; a feed wheel rotatable in the delivery chamber; an actuating member surrounding the feed wheel forming delivery cells and moveable in the housing relative to the feed wheel. The control pressure chamber is delineated by the actuating member together with axially facing axial co-operating surfaces, forming an axial sealing gap and a radial sealing gap. A control fluid can be introduced into the control pressure chamber for applying pressure to the actuating member to exert an actuating force in the actuating direction; a restoring device for generating a restoring force; and a sealing element arranged on the actuating member or the circumferential co-operating surface. To compensate for a change in gap width of one of the axial sealing gaps, a base leakage cross-section is provided on the sealing element.