Self-seating flapper valve for an insufflation cannula assembly

Details Self-seating flapper valve for an insufflation cannula assembly Self-seating flapper valve for an insufflation cannula assembly

1987-12-31

1990-07-24

Hindenburg, Max

Surgery

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

Treating material introduced into or removed from body...

251298, A61M 518

Patent

active

049432800

ABSTRACT:
A cannula assembly for use in conjunction with insufflatory surgical techniques includes a cannula, a housing mounted on one end of the cannula, and a flapper valve mounted in the housing. The flapper valve includes a valve seat which is situated at an opening formed in the housing, a valve plug which is adapted to engage the valve seat to form a substantially gas tight seal with the valve seat, and a support plate on which the valve plug is mounted and which is biased to pivot the plug into and out of engagement with the valve seat. The valve plug is movable on the support plate so as to be self-aligning with the valve seat when the plug and valve are in engagement.

REFERENCES:
patent: 1089805 (1914-03-01), Wolf
patent: 1856138 (1932-05-01), Ruemelin
patent: 2660396 (1953-11-01), Heagerty
patent: 3053278 (1962-09-01), Verheul
patent: 3994287 (1976-11-01), Turp et al.
patent: 4000739 (1977-01-01), Stevens
patent: 4033549 (1977-07-01), Staner
patent: 4177814 (1979-12-01), Knepshield et al.
patent: 4373550 (1983-02-01), Yelich
patent: 4379458 (1983-04-01), Bauer et al.
patent: 4535773 (1985-08-01), Yoon
patent: 4601710 (1986-07-01), Moll
patent: 4654030 (1987-03-01), Moll et al.

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