Single-use syringe
OwnerTheodor Schöttliinventor
Life of this patent
Estimating the term…
Abstract
A single-use syringe has a barrel which can constitute a one-piece extrusion, and a shank which is reciprocably guided in the barrel and the distal end of which carries a plunger movable in the barrel toward and away from the needle-carrying front end portion of the barrel. The coupling between the plunger and the shank includes a set of circumferentially spaced-apart breakable spokes which can be of one piece with the distal end of the shank as well as with the plunger. The spokes break not later than when the shank completes a forward stroke during which the plunger expels a flowable substance, such as a medicine, from a chamber located in the barrel between the needle-carrying front end portion and the plunger. The plunger, the spokes and the shank can constitute a one-piece extrusion.
Claims25
A single-use syringe, comprising:
- an elongated tubular barrel having an open first end portion and a second end portion arranged to support a needle;
- a plunger reciprocably received in and defining with said barrel a variable-volume fluid-receiving chamber adjacent said second end portion of the barrel;
- an elongated shank having a distal end adjacent said plunger and a manually shiftable proximal end at the first end portion of said barrel;
- and
- a coupling connecting said plunger with said distal end of said shank, said coupling including an array of circumferentially spaced-apart breakable spokes each of which is of one piece with said plunger and with said distal end of said shank.
Dependencies are inferred from the claim text.