Needleless dual direction check valve

Details Needleless dual direction check valve Needleless dual direction check valve

1994-04-06

1995-02-21

Chambers, A. Michael

Valves and valve actuation

With correlated flow path

Valve operated by joining flow path sections

604256, 604905, 2511491, F16L 3728

Patent

active

053908988

ABSTRACT:
A dual direction check valve which facilitates the connection of an IV fluid line to the proximal end of a hypodermic needle that is used to make a veni puncture so that a patient may be infused with fluid from an IV medication bag, or the like. What is more, the check valve is adapted to reliably block the backflow of blood through the needle during the interconnection and start-up of the IV system. A resilient valve core formed from an elastomeric material has a peripheral sealing surface extending therearound. The check valve is closed to fluid flow in both directions when the sealing surface of the valve core mates against a complementary peripheral sealing surface which surrounds the valve core. The check valve is opened to fluid flow in both directions when an axial pushing force (e.g. generated by a Luer lock fitting) is applied to the valve core, whereby the valve core is compressed and the sealing surface thereof is separated from its complementary sealing surface to establish a gap therebetween.

REFERENCES:
patent: 4421296 (1983-12-01), Stephens
patent: 4700744 (1987-10-01), Rutter et al.
patent: 4710168 (1987-12-01), Schwab et al.
patent: 4819908 (1989-04-01), Norkey
patent: 5289849 (1994-03-01), Paradis

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