Disposable syringe for once-only use

Details Disposable syringe for once-only use Disposable syringe for once-only use

1991-10-03

1992-05-26

Rosenbaum, C. Fred

Surgery

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

Treating material introduced into or removed from body...

128919, A61M 500

Patent

active

051163209

ABSTRACT:
This invention relates to a disposable syringe for once-only use. The syringe includes a hollow cylinder which carries a needle at one end and houses a plunger connected to one end of a shaft, the other end of which is provided with a manually operable shaped head. the diameter of this head is a maximum in proximity to that portion adjacent to the shaft and reduces gradually towards the free end of the head. The shaft length is such that when the plunger has been pushed to the bottom of the cylinder, the maximum diameter portion of the head is housed within the cavity of the cylinder so that the shaft head can no longer be gripped by the fingers in order to move the shaft backwards and reuse the syringe.

REFERENCES:
patent: 3478937 (1969-11-01), Solowey
patent: 3667657 (1972-06-01), Chiquiar-Arias
patent: 3934586 (1976-01-01), Easton et al.
patent: 3951146 (1976-04-01), Chiquiar-Arias
patent: 3967759 (1976-07-01), Baldwin et al.
patent: 3998224 (1976-12-01), Chiquiar-Arias
patent: 4121588 (1978-10-01), Geiger
patent: 4233975 (1980-11-01), Yerman
patent: 4391272 (1983-06-01), Staempfli
patent: 4439184 (1984-03-01), Wheeler
patent: 4571242 (1986-02-01), Klein et al.
patent: 4699614 (1987-10-01), Glazier
patent: 4781684 (1988-11-01), Trenner
patent: 4863072 (1989-09-01), Perler

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