Medical administration set with backflow check valve

Details Medical administration set with backflow check valve Medical administration set with backflow check valve

1980-12-12

1982-10-19

Apley, Richard J.

Surgery

Respiratory method or device

Ozone or ion generation

128274, A61M 500

Patent

active

043544924

ABSTRACT:
An administration set with a check valve above a side port where the side port is used for the introduction of a secondary liquid, and this check valve is extremely sensitive to minute pressure changes in the combined administration set. The valve includes a very light disk supported on a series of upstanding prongs that hold a sealing surface of the disk to within 0.002 to 0.030 inch of a valve seat when in open position. The highly sensitive valve is easy to manufacture, easy to prime, and resists malfunctioning due to sticking shut or open. The valve also permits high flow rates (up to 500 ml/hr. or more) commonly used in medical administration sets.

REFERENCES:
patent: 2538662 (1951-01-01), Abbott
patent: 2999499 (1961-09-01), Willett
patent: 3886937 (1975-06-01), Bobo et al.
patent: 3976402 (1976-08-01), Lundquist
patent: 3978857 (1976-09-01), McPhee
patent: 4005710 (1977-02-01), Zeddies et al.
patent: 4034754 (1977-07-01), Virag
patent: 4141379 (1979-02-01), Manske

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