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ELECTROMAGNETIC PUMP

  • US 3,601,509 A
  • Filed: 08/11/1969
  • Issued: 08/24/1971
  • Est. Priority Date: 08/11/1969
  • Status: Expired due to Term
First Claim
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1. A pump comprising:

  • a. a housing defining an internal pumping chamber and having inlet and outlet ports communicating with said chamber;

    b. a piston moveable in first and second directions within said chamber and having a fluid conducting opening extending between portions of said chamber proximal to said outlet port and other portions of said chamber;

    c. a seAling member connected to said piston to engage the inner walls of said chamber during movement of said piston in said first direction;

    d. means connected to said piston for supporting said sealing member when said piston moves in said first direction, said means having a contoured lateral surface adjacent said member to deflect said member substantially in conformity with the shape of said surface;

    e. means for biasing said piston in said second direction; and

    f. electromagnetic means for moving said piston in said first direction.

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