Retractable non-reusable needle
OwnerWilliam L. Cooperinventor
Life of this patent
Estimating the term…
Abstract
A retractable needle assembly is disclosed. The needle assembly consists of a syringe body, having a needle assembly on one end and a plunger assembly on the opposing end. The needle assembly, which enables and disables fluid communication between the needle and fluid reservoir, comprises a generally cylindrical body sealably disposed within the lower interior of the syringe body. The cylindrical body is rotatable, facilitated by a knurled ring, within the syringe body. Rotation of the cylindrical body causes either enablement or disablement of the needle assembly. Tabs, located on the syringe body are received within notches, separated by one-way and two-way ramps, located on the cylindrical body, such that the ramps facilitate either temporary or permanent disablement of the device. Plunger lock means are also disclosed.
Claims20
A retractable syringe comprising:
- a) a hollow syringe body, having a plunger end, a needle end, and a fluid reservoir located therebetween;
- b) a plunger assembly, having a shaft, a base located on one end of the shaft, and a handle located on the opposing end of the shaft, slidably disposed within the syringe body at the plunger end;
- c) a needle in fluid connection with the fluid reservoir;
- d) a fluid connection means, disposed within the syringe body at the needle end, for selectably enabling and disabling fluid connection between the needle and the fluid reservoir;
- e) a rotation means, engaging the fluid connection means, for facilitating rotation of the fluid connection means;
- and
- f) a retraction means, hydrostatically engaging the fluid connection means with the plunger, for facilitating retraction of the fluid connection means and the needle into the syringe body.
Dependencies are inferred from the claim text.