Hypodermic syringe

Details Hypodermic syringe Hypodermic syringe

1986-11-24

1987-10-06

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604 92, A61M 3700

Patent

active

046980555

ABSTRACT:
A syringe in which a first medicament is stored in an elongated barrel, adjacent its distal end, while a second medicament is stored in an exterior compartment between the distal and proximal ends in communication with the barrel. A plunger having a piston head with spaced apart sealing rings is located in the syringe barrel with the opposing sealing rings occluding the exterior compartment so as to isolate the medicaments from each other. The piston is normally locked in this position. In use, the piston is moved adjacent the proximal end of the barrel to allow the medicament in the exterior compartment to intermix with the first medicament before dispensing.

REFERENCES:
patent: 2541621 (1951-02-01), Thompson
patent: 2896622 (1959-07-01), Huttermann
patent: 3889674 (1975-06-01), Cilento
patent: 4065360 (1977-12-01), Kreb, III
patent: 4116240 (1978-09-01), Guiney

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