Automatic lumen shut-off

Details Automatic lumen shut-off Automatic lumen shut-off

1994-01-27

1995-04-04

Hirsch, Paul J.

Surgery

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

Treating material introduced into or removed from body...

604256, A61M 3904, A61M 500

Patent

active

054032849

ABSTRACT:
The invention features a needle and a housing having a proximal inner surface and a distal inner seat leading to and defining a lumen, wherein the needle is slidable through the housing to occupy the lumen. The housing contains and is cooperable with a valve shaped so as to sealably fit against the housing distal inner seat, the valve including a hole alignable with the lumen. When the needle slidably occupies the housing, the valve hole, and the lumen, the valve is prevented from sealably fitting against the housing distal inner seat. The housing also contains an outward biasing means biased against the valve. Upon removal of the needle from the housing, the outward biasing means urges the valve sealably against the housing distal inner seat so as to prevent flow of fluid or air through the lumen.

REFERENCES:
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patent: 4612010 (1986-09-01), Hamacher et al.
patent: 4740203 (1988-04-01), Hoskins et al.
patent: 4863442 (1989-09-01), DeMello et al.
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patent: 4886507 (1989-12-01), Patton et al.
patent: 4960412 (1990-10-01), Fink
patent: 4976688 (1990-12-01), Rosenblum
patent: 5098394 (1992-03-01), Luther
patent: 5195980 (1993-03-01), Catlin
patent: 5261895 (1993-11-01), Kablik
patent: 5308336 (1994-05-01), Hart et al.

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