Rotary lock for needle sheaths

Details Rotary lock for needle sheaths Rotary lock for needle sheaths

1993-04-30

1994-01-18

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604263, A61M 532

Patent

active

052795845

ABSTRACT:
This specification discloses a lock for a latch on a hypodermic syringe which has a reciprocating sheath that is normally latched to cover the needle to protect persons handling the syringe. The latch is operated to withdraw the sheath to expose the needle for use. The latch shell 22 is moved longitudinally to actuate latch fingers 26. After use it is desirable to lock the latch to prevent reuse of the syringe. A user manually rotates the latch shell 20 to lock the latch in the position where the sheath is over the needle. Rotary motion causes the lugs 26 to ride up the ramps 28 and then drop into the recesses 29. Thereafter, there can be no rotation and no reciprocation of the latch. The lugs prevent rotary motion as well as reciprocating motion of the latch shell 22.

REFERENCES:
patent: 5088988 (1992-02-01), Talonn et al.
patent: 5104385 (1992-04-01), Huband

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