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Pressure and current reducing impeller

  • US 7,722,311 B2
  • Filed: 11/30/2006
  • Issued: 05/25/2010
  • Est. Priority Date: 01/11/2006
  • Status: Expired due to Fees
First Claim
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1. A pump comprising:

  • an inlet;

    an outlet;

    a pumping chamber;

    one or more sealing surfaces between said inlet and said outlet; and

    a pressure relief feature formed by at least one groove on said sealing surface, wherein said at least one groove extends across said sealing surface between said inlet and said outlet.

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