Patent Number: 8,512,018

Title: Gear pump with pressure relief groove

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.

Inventors: Jordan; Martin (Duesseldorf, DE), Hoppe; Stephan (Willich, DE), Floerchinger; Juergen (Erkrath, DE)

Assignee: TRW Automotive GmbH

International Classification: F01C 1/18 (20060101); F01C 1/24 (20060101); F01C 21/18 (20060101); F04C 2/18 (20060101); F04C 2/24 (20060101); F04C 15/06 (20060101)

Expiration Date: 2021-08-20 0:00:00