Cannula with improved valve and skin seal

Details Cannula with improved valve and skin seal Cannula with improved valve and skin seal

1992-10-29

1994-06-28

Graysay, Tamara L.

Surgery

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

Treating material introduced into or removed from body...

137847, 2511493, A61M 500

Patent

active

053242700

ABSTRACT:
A cannula having an elongate rigid tubular member with proximal and distal extremities. A cylindrical housing is secured to the proximal extremity of the tubular member. A duckbill valve assembly is disposed in the cylindrical housing. The valve assembly has a valve member formed of an elastomeric material and having first and second leaflets forming a duckbill-type seal. First and second spring fingers are provided which engage said first and second leaflets and yieldably urge the leaflets into a closed position whereby in the event the leaflets take a permanent set towards an open position, the spring fingers will urge the first and second leaflets into a closed sealing position.

REFERENCES:
patent: 2526629 (1950-10-01), Bourke
patent: 3566964 (1971-03-01), Livingston
patent: 4419094 (1983-12-01), Patel
patent: 4917668 (1990-04-01), Haindl
patent: 5009643 (1991-04-01), Reich et al.

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