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. 20, 2013
Filed:
Sep. 28, 2007
Applicants:
Martin Jordan, Duesseldorf, DE;
Stephan Hoppe, Willich, DE;
Juergen Floerchinger, Erkrath, DE;
Inventors:
Assignee:
TRW Automotive GmbH, Alfdorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01C 1/18 (2006.01); F01C 1/24 (2006.01); F01C 21/18 (2006.01); F04C 2/18 (2006.01); F04C 2/24 (2006.01); F04C 15/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A hydraulic device has an inlet side and an outlet side and includes two meshing cogwheels. Each cogwheel has external oblique teeth and is arranged between an inlet side and an outlet side. At least one control groove is provided on an end side of the cogwheels. The control groove periodically produces a pressure equalizing connection during the rotation of the cogwheels.