Stroke limiting syringe with retractable needle

Details Stroke limiting syringe with retractable needle Stroke limiting syringe with retractable needle

1993-01-25

1993-11-23

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604195, 604198, 604199, 604208, 604220, A61M 550

Patent

active

052639347

ABSTRACT:
A syringe having a casing, a shiftable rod assembly, and a needle foot latched at a first end of the casing is disclosed. The syringe is equipped with a shiftable ring for limiting stroke length of the rod assembly in such a way to maintain the piston at a predetermined distance from the needle foot, and to increase the stroke length after a second outward shifting stroke of the piston for drawing in liquid, in such a way that upon a second inward shifting stroke of the piston for expulsion of the injection liquid, the piston will be coupled with the needle foot.

REFERENCES:
patent: 2869541 (1959-01-01), Helmer et al.
patent: 4642102 (1987-02-01), Ohmori
patent: 4790822 (1988-12-01), Haining
patent: 4820272 (1989-04-01), Palmer
patent: 4883471 (1989-11-01), Braginetz et al.
patent: 5026354 (1991-06-01), Kocses
patent: 5116319 (1992-05-01), Van Den Haak
patent: 5215533 (1993-06-01), Robb

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