Safety valve for preventing air embolism and hemorrhage

Details Safety valve for preventing air embolism and hemorrhage Safety valve for preventing air embolism and hemorrhage

1980-06-20

1982-04-13

Pellegrino, Stephen C.

Surgery

Respiratory method or device

Ozone or ion generation

128349R, 128274, 2511496, A61M 500, F16L 2900

Patent

active

043242391

ABSTRACT:
A safety valve for catheterization procedures is characterized by a piston having an internal flow path, a portion of the piston being surrounded by an elastomeric member which surrounds a portion of the piston and biases it to a closed position. The elastomeric member also severely restricts fluid flow around the piston to eliminate any flow path other than the internal piston flow path.

REFERENCES:
patent: 2693801 (1954-11-01), Foreman
patent: 3087492 (1963-04-01), Garth
patent: 3105511 (1963-10-01), Murphy, Jr.
patent: 3399677 (1968-09-01), Gould et al.
patent: 3538950 (1970-11-01), Porteners
patent: 3570484 (1971-03-01), Steer
patent: 3923065 (1975-12-01), Nozick et al.
patent: 3965910 (1976-06-01), Fischer

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