Needle guard and needle assembly for syringe

Details Needle guard and needle assembly for syringe Needle guard and needle assembly for syringe

1993-10-15

1994-11-01

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604240, A61M 500

Patent

active

053604040

ABSTRACT:
The syringe includes a plunger and an adapter carrying a needle, the adapter being threaded into the end of the barrel for withdrawal, upon connection with the plunger and together with the needle, into the interior of the barrel. To prevent the adapter from unseating from the barrel end before or during use, the needle guard and hub are connected to enable axial pressure from the needle guard to be transmitted through the hub to the adapter to attach the hub to the adapter. Cooperating surfaces on the needle guard and needle hub are engageable to enable a torque to be applied to the adapter only in a direction opposite to the direction of rotation of the adapter during unseating. To the extent rotation of the needle guard in the opposite direction applies a torque to the adapter, that torque is insufficient to unseat the adapter from the barrel end.

REFERENCES:
patent: 4740205 (1988-04-01), Seltzer et al.
patent: 4998924 (1991-03-01), Ranford
patent: 5053018 (1991-10-01), Talon et al.
patent: 5147325 (1992-09-01), Mitchell et al.
patent: 5205833 (1993-04-01), Harsh et al.
patent: 5250037 (1993-10-01), Bitdinger

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