Self-injecting syringe

Details Self-injecting syringe Self-injecting syringe

1981-10-19

1983-10-04

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604233, A61M 500

Patent

active

044072830

ABSTRACT:
A squeezing finger pressure is exerted on a trigger mechanism carried by a finger-grip portion of a hypodermic syringe. The depressed trigger mechanism displaces a V-shaped lock spring inwardly, moving a bight portion of the spring out from locking engagement with a lock opening. This frees a compressed compression spring allowing it to drive an internal bushing, a cartridge within a barrel portion of the syringe, a second bushing at the front end of the syringe, and a needle forwardly together, relative to the finger-grip body and the barrel of the syringe. This is done for the purpose of penetrating a needle into tissue in which an injection is to be made.

REFERENCES:
patent: 98478 (1870-01-01), Eccleston
patent: 922331 (1909-05-01), Quarles
patent: 1845036 (1932-02-01), Busher
patent: 1921034 (1933-08-01), La Marche
patent: 2565081 (1951-08-01), Maynes
patent: 2664086 (1953-12-01), Transue
patent: 3224445 (1965-12-01), Melott
patent: 3583399 (1971-06-01), Ritsky
patent: 3605743 (1971-09-01), Arce
patent: 3605744 (1971-09-01), Dwyer
patent: 3656472 (1972-04-01), Moura
patent: 3702608 (1972-11-01), Tibbs
patent: 3880163 (1975-04-01), Ritterskamp
patent: 4202314 (1980-05-01), Smirnov et al.

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