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IMPLANTABLE INDUSION PUMP

  • US 3,731,681 A
  • Filed: 01/14/1972
  • Issued: 05/08/1973
  • Est. Priority Date: 05/18/1970
  • Status: Expired due to Term
First Claim
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1. An infusion pump for implantation in a living body comprising:

  • A. a housing, B. means for dividing the housing into first and second fluidtight chambers, the dividing means being movable relative to the housing so as to vary the volumes of the chambers in a reciprocal manner, C. an inlet conduit located at a first position on the housing leading to the second chamber, D. at least one outlet conduit located at a second position on the housing adjacent to but spaced from said inlet conduit communicating with the second chamber and for leading to an infusion site in the body, E. means in the first chamber for moving the dividing means to reduce the volume of the second chamber so that a fluid in the second chamber may be forced through the outlet conduit, and F. a self-sealing, penetrable member in said inlet conduit, said member being unobstructed so that the pump can be implanted in the body with the unobstructed penetrable member situated adjacent a surface area of the body whereby the second chamber can be refilled with fluid periodically by injection through the skin.

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