Filter assembly for use with a hypodermic syringe

Details Filter assembly for use with a hypodermic syringe Filter assembly for use with a hypodermic syringe

1988-02-08

1989-04-11

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

222386, A61M 500

Patent

active

048202762

ABSTRACT:
A filter assembly for a hypodermic syringe consists of a compartmented filter unit whose compartments contain filter material. Ports open through a lower wall of the respective compartment, and rotatably fixed to the filter unit is a disc-like fluid passage member having a first fluid passage therein one end of which is selectively movable into alignment with the respective ports and the other end of which is in communication with a second fluid passage through a needle-receiving hub fixed to the lower face of the fluid passage member. By indexing the fluid passage member, fluid pumped into and out of the syringe barrel may be subjected to filtration through fresh filter areas in successive compartments.

REFERENCES:
patent: 3747812 (1973-07-01), Karman et al.
patent: 4008718 (1977-02-01), Pitesky
patent: 4137917 (1979-02-01), Cohen
patent: 4609371 (1986-09-01), Pizzino

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