Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1984-06-12
1987-03-31
Schwadron, Martin P.
Fluid handling
Line condition change responsive valves
Direct response valves
137843, 12820715, 604 99, F16K 1514
Patent
active
046535390
ABSTRACT:
A self-sealing check valve is disclosed for use in the inflation of a catheter cuff. The valve includes a valve housing and a valve element sealingly positioned within the housing. The valve housing has a transversely located fitting for receiving a Luer tip device. A valve element is cylindrical and preferably hollow. A circumferential rim at each end of the element is maintained in a state of compression so that it presses against the inner wall of the housing to form a seal. The element also includes a circumferential channel which is aligned with the Luer fitting. Insertion of the Luer tip device into the fitting depresses the valve element and breaks the seal between the rims and the valve housing wall. This allows fluid flow in either direction through the valve. Resiliency of the valve element causes resealment at the rims when the Luer tip device is removed.
REFERENCES:
patent: 2912981 (1959-11-01), Keough
patent: 2993654 (1961-07-01), Norton
patent: 3346001 (1967-10-01), Camp
patent: 3416567 (1968-12-01), Von Dardel et al.
patent: 3794043 (1974-02-01), McGinnis
patent: 3831629 (1974-08-01), Mackal et al.
patent: 4063555 (1977-12-01), Ulinder
patent: 4143853 (1979-03-01), Abramson
patent: 4171007 (1979-10-01), Bouteille
patent: 4489750 (1984-12-01), Nehring
Mallinckrodt Inc.
Novack Sheri M.
Schwadron Martin P.
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