Automatic injection syringe

Details Automatic injection syringe Automatic injection syringe

1982-08-05

1985-07-16

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604191, A61M 520

Patent

active

045294038

ABSTRACT:
The invention relates to an automatic syringe for injecting two or more different injection liquids which may not be in contact with each other for long periods of time. For that purpose, the ampoule between the piston and the needle connection includes one or more stoppers which keep the injection liquids separated from each other, while at a point a short distance before the needle connection a by-pass means is present through which the injection liquid or injection liquids present behind the stopper or stoppers can pass the stopper or stoppers during use of the syringe.

REFERENCES:
patent: 2591046 (1952-04-01), Brown
patent: 2717601 (1955-09-01), Brown
patent: 3330282 (1967-07-01), Visser et al.
patent: 3881484 (1975-05-01), Gidcumb, Jr.
patent: 3914419 (1975-10-01), Haeger et al.
patent: 4031893 (1977-06-01), Kaplan et al.
patent: 4235235 (1980-11-01), Bekkering
patent: 4394863 (1983-07-01), Bartner

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