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:
Feb. 02, 2010
Filed:
Mar. 09, 2007
Markus Hanst, Oberschleiβheim, DE;
Martin Korn, Jetzendorf, DE;
Jörg Weissgärber, Munich, DE;
Christof Härle, Weingarten, DE;
Christof Lamparski, Mittelbiberach, DE;
Markus Hanst, Oberschleiβheim, DE;
Martin Korn, Jetzendorf, DE;
Jörg Weissgärber, Munich, DE;
Christof Härle, Weingarten, DE;
Christof Lamparski, Mittelbiberach, DE;
Shwaebische Huettenwerke Automotive GmbH & Co. KG, Aalen-Wasseralfingen, unknown;
Abstract
An external toothed wheel pump, comprising a delivery chamber comprising an inlet and an outlet for a fluid; a first feed wheel and a second feed wheel which can be rotationally driven for delivering the fluid and are in a toothed engagement with each other which separates the outlet from the inlet; and sealing surfaces which axially face the feed wheels and form axial sealing gaps with the feed wheels, wherein at least one of the sealing surfaces comprises a relieving pocket on a high-pressure side of the delivery chamber only and except for the relieving pocket, extends circumferentially up to at least the root circle and tip circle of the axially facing feed wheel.