Non-reusable syringe

Details Non-reusable syringe Non-reusable syringe

1988-09-07

1991-04-02

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604110, A61M 500

Patent

active

050044605

ABSTRACT:
A non-reusable hypodermic syringe consists of a barrel and a plunger, the plunger having first and second sections divided by a torque reacting point of rupture between them. Means is provided for causing relative rotation between one of the plunger sections and the barrel during the ejection cycle so as to create a torque differential between the sections which results in a rupture of the plunger at the torque reacting point at the end of the ejection cycle. A clutch mechanism is provided to disengage rotational motion from the plunger when liquid is being drawn into the barrel. The clutch engages or transmits rotational motion to the plunger when the plunger is moved in the other direction to eject liquid from the barrel.

REFERENCES:
patent: 2130305 (1938-09-01), Lewis
patent: 3320954 (1967-05-01), Cowley
patent: 4220151 (1980-09-01), Whitney
patent: 4675005 (1987-06-01), DeLuccia
patent: 4677980 (1987-07-01), Reilley et al.
patent: 4699614 (1987-10-01), Glazier
patent: 4775363 (1988-10-01), Sandsdalen
patent: 4775364 (1988-10-01), Alles
patent: 4810249 (1989-03-01), Haber et al.
Abstract of Spanish Utility Model No. 229607, Industrial Patent Abstracts (Spain), Sep. 1, 1977, pg. 6389.

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