Safety minute dose hypodermic syringe

Details Safety minute dose hypodermic syringe Safety minute dose hypodermic syringe

1995-10-24

1997-01-07

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604195, A61M 532

Patent

active

055911315

ABSTRACT:
A safety minute dose hypodermic syringe which includes a locating stopper mounted inside the front end of the barrel and connected to the locking tip, which holds the needle cannula, and an arrowhead-like retainer rod fixed secured to the movable rubber stopper and connected to the plunger, the arrowhead-like retainer rod being forced into engagement with an arrowhead-like retaining hole on the locating stopper after the injection, for permitting the locating stopper and the locking tip with the needle cannula to be pulled backwards by the plunger to the inside of the barrel and retained in place by inside annular flanges of the barrel, and for permitting the needle cannula to be deformed by the plunger when the plunger is disconnected from the retainer rod and inserted into the front end of the barrel.

REFERENCES:
patent: 4728320 (1988-03-01), Chen
patent: 4747830 (1988-05-01), Gloyer et al.
patent: 4770655 (1988-09-01), Haber et al.
patent: 5295973 (1994-03-01), Chen

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