Pump

  • US 7,082,762 B1
  • Filed: 01/24/2005
  • Issued: 08/01/2006
  • Est. Priority Date: 07/16/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. A hydraulic pump for use in connection with an external reservoir for hydraulic fluid, the hydraulic pump comprising:

  • a housing rotatably supporting a pump shaft;

    an end cap attached to the housing, the end cap having a first surface attached to the housing to form an internal sump, a second surface formed opposite to the first surface and a plurality of sides between the first and second surfaces;

    hydraulic porting formed in the end cap;

    a cylinder block rotatably mounted in the internal sump and in fluid communication with the hydraulic porting;

    a bypass valve located in a first side of the end cap and connected to the hydraulic porting; and

    an inlet port formed in the first side of the end cap to connect the hydraulic porting to the external reservoir, wherein the inlet port is parallel to the bypass valve.

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