Safety syringe for intravenous injection with a guided plunger

Details Safety syringe for intravenous injection with a guided plunger Safety syringe for intravenous injection with a guided plunger

1998-02-24

2000-09-12

Coggins, Wynn Wood

Surgery

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

Treating material introduced into or removed from body...

604195, A61M 500

Patent

active

061171077

ABSTRACT:
A safety syringe for intravenous injection with a guided plunger is provided that comprises a barrel, a needle unit, and a plunger. An outlet is eccentrically disposed on the top of the barrel. The needle unit includes a needle and a spindle shaped needle holder mounted inside the outlet. A connecting stem has an arrowhead shaped mortise disposed under the spindle shaped needle holder. A plunger has a plunger head on the top thereof with an arrowhead shaped tenon eccentrically disposed thereon. A supporting plate disposed under the plunger head has two guide notches matched with two longitudinal guide strips inside the barrel, so that the arrowhead shaped tenon aligns with the needle unit. After completion of the injection, the arrowhead shaped tenon and the needle unit are connected together, the needle unit can then be pulled into the barrel and subsequently deformed.

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