Air check valve

Details Air check valve Air check valve

1986-10-28

1988-02-02

Pellegrino, Stephen C.

Surgery

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

Treating material introduced into or removed from body...

137860, 604129, A61M 500

Patent

active

047227311

ABSTRACT:
The air check valve has a one-piece housing provided with a pair of coaxial passageways and radiating ports which are closed over by an elastic sleeve. When the pressure in the upstream passageway is greater than in the downstream passageway and the crack or opening pressure of the sleeve is exceeded, the sleeve expands radially so as to permit communication between the two passageways for the conveyance of fluid.
The air check valve may also be provided with a one-way valve in a partition between the two passageways to permit withdrawal of fluids from a patient.

REFERENCES:
patent: 2988103 (1961-06-01), Canvasser
patent: 3298391 (1967-01-01), Savage
patent: 3445085 (1968-05-01), Eckel et al.
patent: 3991768 (1976-11-01), Portnoy
patent: 4258712 (1981-03-01), Harms et al.
patent: 4313462 (1982-02-01), Adamson
patent: 4515589 (1985-05-01), Austin et al.
patent: 4552553 (1985-11-01), Schulte et al.
patent: 4568333 (1986-02-01), Sawyer et al.
patent: 4592747 (1986-06-01), Pool

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