Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1982-09-29
1984-07-03
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Direct response valves
137223, 13754317, A61F 500, F16K 1704
Patent
active
044573359
ABSTRACT:
A simple, reliable pressure control valve for a medical device having a hydraulic system comprises a valve housing having an open top and a bottom and an inwardly directed shoulder partially closing the top; a poppet with an upwardly extending stem mounted in the housing between the top and the bottom; a sealing edge mounted on the poppet circumferentially about the stem, and a calibrated spring urging the poppet towards the open top of the housing so that the sealing edge is in sealing contact with the underside of said shoulder and the stem extends above the top of said housing so that manual pressure can be exerted upon the stem to open the valve or the valve can be opened by a hydraulic pressure which exerts sufficient force upon the top of the poppet to overcome the force of the spring.
REFERENCES:
patent: 278240 (1883-05-01), Hunt
patent: 1073370 (1913-09-01), Stelzner
patent: 2336473 (1943-12-01), Eilers
patent: 2588493 (1952-03-01), DeStefano
patent: 2670759 (1954-03-01), St. Clair
patent: 3018618 (1962-01-01), Williams
patent: 3040764 (1962-06-01), Feinberg
patent: 3396743 (1968-08-01), Mackal
patent: 3456686 (1969-07-01), Kemble
Medical Engineering Corporation
Nilson Robert G.
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