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Infusate injection apparatus

  • US 4,190,048 A
  • Filed: 07/14/1978
  • Issued: 02/26/1980
  • Est. Priority Date: 07/14/1978
  • Status: Expired due to Term
First Claim
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1. Apparatus for injecting infusate percutaneously through a septum into an infusate chamber implanted in a body comprising:

  • A. a housing,B. a needle projecting from the housing, said needle having a longitudinal passage,C. means for slidably mounting the needle in the housing so that it is movable between an extended positon and a retracted position,D. means for biasing the needle toward its extended position,E. means for conducting fluid into the housing, andF. valve means in the housing for controlling the flow of fluid from the housing into the needle, said valve means being closed when the needle is in its extended position and said valve means being open when the needle is in its retracted position whereby fluid infusate cannot flow through the needle unless the exposed end of the needle bottoms against a stop in the chamber thereby facilitating moving the needle to its retracted position, said valve means comprising;

    1. a transverse passage through the needle near its inner end, said transverse passage intercepting the longitudinal passage through the needle, and2.

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