Implantable magnetically-actuated valve

Details Implantable magnetically-actuated valve Implantable magnetically-actuated valve

1982-05-10

1985-09-17

Apley, Richard J.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

623 11, 13762565, 25112921, 128 1R, A61M 2900, A61F 100

Patent

active

045414297

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.

REFERENCES:
patent: 3315660 (1967-04-01), Abella
patent: 3495620 (1970-02-01), Raimondi et al.
patent: 3570806 (1971-03-01), Sturman
patent: 3659600 (1972-05-01), Merrill
patent: 3675171 (1972-07-01), Kirk
patent: 3856044 (1974-12-01), Caldwell
patent: 4076045 (1978-02-01), Nakajima et al.
patent: 4463969 (1984-08-01), Harrison

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