Hypodermic needle safety system

Details Hypodermic needle safety system Hypodermic needle safety system

1989-04-24

1991-10-15

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604192, 604110, A61M 500

Patent

active

050570870

ABSTRACT:
The disclosed hypodermic syringe includes a syringe barrel, a needle extending from the barrel, a movable safety sleeve surrounding the barrel, and a sleeve cap to cover the forward end of the sleeve. The syringe barrel includes a forward detent, an intermediate detent, and a rear detent, and the safety sleeve includes an inner ring for selective engagement with the detents. The safety sleeve is axially movable on the syringe barrel from an initial transport position on the intermediate detent, to a retracted position on the rear detent to expose the needle, and to a locked safety position on the forward detent. The sleeve cap is held on the safety sleeve by friction when the sleeve is in the transport position, and by positive engagement with the safety sleeve when the sleeve is in the locked safety position.

REFERENCES:
patent: 4631057 (1986-12-01), Mitchell
patent: 4702738 (1987-10-01), Spencer
patent: 4737144 (1988-04-01), Choksi
patent: 4738663 (1988-04-01), Bogan
patent: 4743233 (1988-05-01), Schneider
patent: 4747837 (1988-05-01), Hauck
patent: 4752290 (1988-06-01), Schramm
patent: 4874383 (1989-10-01), McNaughton
patent: 4908023 (1990-03-01), Yuen
patent: 4927417 (1990-05-01), Moncada et al.
patent: 4932940 (1990-06-01), Walker et al.

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