Implantable magnetically-actuated valve
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United States of America Patent
Stats
-
Sep 17, 1985
Grant Date -
N/A
app pub date -
May 10, 1982
filing date -
May 10, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A miniature implantable magnetically actuated valve relatively insensitive to normally-encountered shock loads includes a housing for containing a movable ferromagnetic valve member. Inlet and outlet passages are provided in the housing at least one of which has an internal valve seat which is engageable by the valve member to close that passage. The valve member is resiliently suspended within the housing by special flat multiply-started spiral springs which permit the valve member only a single degree of freedom toward and away from the valve seat. The valve member is biased in one direction or the other and the valve is actuated transcutaneously by a magnet juxtaposed to the valve outside the body which produces a magnetic force on the valve member which exceeds and opposes the biasing force.
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