Safety syringe with displaceable barrel hub

Details Safety syringe with displaceable barrel hub Safety syringe with displaceable barrel hub

1993-02-10

1994-08-09

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604195, A61M 500

Patent

active

053361865

ABSTRACT:
A safety syringe (2) includes a hollow barrel (4) with a barrel hub (24) threadably mounted to and dismountable from the distal end (4) of the barrel. A plunger (10) has a piston (14) at its distal end (20). The plunger and the barrel hub are configured to permit the distal end of the plunger to engage the barrel hub at the conclusion of an injection, typically through a splined interface (46, 52), to allow positive rotary engagement of the barrel hub by the plunger. Thereafter, the plunger is used to withdraw the barrel hub and needle (43) back into the interior (23) of the barrel. The plunger can be fractured at a weakened region (57) adjacent the piston thus leaving the distal end of the plunger, piston, barrel hub and needle housed within the barrel interior. The hollow stem can then be inserted through the distal end of the barrel and over the needle for compact disposal.

REFERENCES:
patent: 4026287 (1977-05-01), Haller
patent: 4507117 (1985-03-01), Vining et al.
patent: 4808169 (1989-02-01), Haber et al.
patent: 4834717 (1989-05-01), Haber et al.
patent: 5030208 (1991-07-01), Novacek et al.
patent: 5098402 (1992-03-01), Davis
patent: 5112316 (1992-05-01), Venturini

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