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:
Jul. 21, 2015
Filed:
Oct. 21, 2012
Holger Siebertz, Lohmar, DE;
Dirk Sickert, Bruehl, DE;
Klaus Becker, Cologne, DE;
Thomas Nied-menninger, Nottuln, DE;
Axel Fassbender, Wuppertal, DE;
Holger Siebertz, Lohmar, DE;
Dirk Sickert, Bruehl, DE;
Klaus Becker, Cologne, DE;
Thomas Nied-Menninger, Nottuln, DE;
Axel Fassbender, Wuppertal, DE;
FORD GLOBAL TECHNOLOGIES, LLC, Dearborn, MI (US);
Abstract
An adjustable rotary vane pump configured to reduce pressure pulsations during hydraulic fluid discharge includes a housing having two side plates positioned in parallel. Each side plate has multiple grooves formed in its surface. A rotor mounted between the side plates has multiple vanes extending radially outward. A lift ring surrounds the rotor, pivotally connected to the housing to swivel between positions eccentric to the housing. During rotation of the rotors, the vanes divide the annular region between the rotor and the lift ring into multiple cells, which alternately position themselves between a suction zone and a pressure zone of the pump. In a transition region between the suction and pressure zone, when the lift ring is between pre-determined angular positions, the grooves within lift ring and the side plate substantially align to create an overflow channel, which transfers the hydraulic fluid from the suction zone to the pressure zone.