Double valve cannula seal

Details Double valve cannula seal Double valve cannula seal

1997-02-07

1998-03-17

Chambers, A. Michael

Valves and valve actuation

With correlated flow path

Valve operated by joining flow path sections

604256, 604905, F16L 3728

Patent

active

057277702

ABSTRACT:
A double valve seal to prevent escape of liquids or gases through a cannula, the seal having a diaphragm valve with a circular aperture to seal the cannula when an instrument is inserted and a spilt conical valve to seal the cannula when no instrument is present. A pair of diametrically opposed ribs are positioned beneath the end member and are aligned with the split in the conical valve so as to abut the open end of the cannula and act as pivot points to impart compressive force against the two halves of the conical valve to improve the effectiveness of the seal.

REFERENCES:
patent: 4909798 (1990-03-01), Fleischhacker et al.
patent: 4946133 (1990-08-01), Johnson et al.
patent: 5092857 (1992-03-01), Fleischhacker
patent: 5456284 (1995-10-01), Ryan et al.

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