Single-use safety syringe

Details Single-use safety syringe Single-use safety syringe

1990-01-23

1991-09-17

Pellegrino, Stephen C.

Surgery

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

Treating material introduced into or removed from body...

604198, 604240, A61M 500

Patent

active

050491334

ABSTRACT:
The present invention relates to a safety-syringe providing a needle with a hollow core having a spring coiled around the needle. The spring is capable of expanding to retract the needle into the body of the syringe. A pressure hinge is provided with a plurality of teeth-shaped triggers for retaining the needle in a position for use and for preventing the piston from moving after use. Further, a vacuum may be provided within the piston for facilitating in the retraction of the needle into the syringe.

REFERENCES:
patent: 3848579 (1974-11-01), Villa-Real
patent: 4687467 (1987-08-01), Cygielski
patent: 4781684 (1988-11-01), Trenner
patent: 4838863 (1989-06-01), Allard et al.
patent: 4838869 (1989-06-01), Allard
patent: 4874832 (1989-10-01), Lindemann et al.
patent: 4955870 (1990-09-01), Ridderheime et al.

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