Self-sheathing hypodermic needle

Details Self-sheathing hypodermic needle Self-sheathing hypodermic needle

1988-08-29

1990-03-06

Truluck, Dalton L.

Surgery

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

Treating material introduced into or removed from body...

604164, A61M 532

Patent

active

049062360

ABSTRACT:
A needle assembly comprises a needle having a sharp point encased within and movable with respect to a sheath having a blunt end. A hub attached to the sheath has a recess therein for receiving a compressible member carried by an end of the needle having a collar thereon for engaging the compressible member. The compressible member retracts the point of the needle into the interior of the sheath to prevent contact of the point by user of the needle. When the needle assembly is attached to a syringe, or other instrument, the collar of the needle is engaged by a portion of the syringe and moved to compress the compressible member and expose the point of the needle for use.

REFERENCES:
patent: 3727613 (1973-04-01), Sorenson et al.
patent: 4666435 (1987-05-01), Braginetz
patent: 4775369 (1988-10-01), Schwartz
patent: 4795432 (1989-01-01), Karczmer
patent: 4813940 (1989-03-01), Parry
patent: 4850996 (1989-07-01), Cree

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