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. 29, 2011
Filed:
Jun. 23, 2007
Applicants:
Marco Grethel, Bühlertal, DE;
Oswald Friedmann, Lichtenau, DE;
Christoph Vetter, Karlsruhe, DE;
Eric Müller, Kaiserslautern, DE;
Inventors:
Marco Grethel, Bühlertal, DE;
Oswald Friedmann, Lichtenau, DE;
Christoph Vetter, Karlsruhe, DE;
Eric Müller, Kaiserslautern, DE;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01C 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A positive-displacement pump having an eccentrically positioned internal ring gear and pinion within a pump housing. Pressurized operating fluid is provided by the pump to actuate an actuation piston of a clutch unit, such as a double clutch unit. The clutch unit is drivingly coupled with the pump for movement between engaged and disengaged positions. At least one throughbore is provided in the pump housing within which throughbore the clutch actuation piston is guided.