Dual dose syringe

Details Dual dose syringe Dual dose syringe

1986-07-14

1987-10-27

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

A61M 508

Patent

active

047027371

ABSTRACT:
A multiple dose, single barrel syringe has a barrel comprising a plurality of telescoping sections of progressively decreasing diameter. A puncturable fluid tight membrane extending across the forward end of each barrel section except the first divides the interior of the barrel into a plurality of separate fluid receiving chambers, each of which may contain a different fluid medication. A plunger is slidably mounted in the last barrel section and extends exteriorly therefrom. At the forward end of the syringe is a hollow needle, which extends through a needle-receiving tubular conduit at the forward end of the first barrel section so that the needle is disposed partly inside and partly outside the barrel. Both ends of the needle are sharply pointed. The inner end of the needle punctures the membranes so that, as each chamber in the barrel is emptied, the next chamber is placed in communication with the needle.

REFERENCES:
patent: 2453591 (1948-11-01), Poux
patent: 2939459 (1970-06-01), Lazarte et al.
patent: 3911916 (1975-10-01), Stevens
patent: 3923058 (1975-03-01), Weingarten
patent: 3946732 (1976-03-01), Hurscham
patent: 4171698 (1979-10-01), Genese
patent: 4313440 (1982-02-01), Ashley
patent: 4424057 (1984-01-01), House
patent: 4439184 (1984-05-01), Wheeler

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