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US 5,853,390 AGranted
Syringe for hypodermic injections
AssigneeGiovanni Freschi
InventorClaudio Freschi
Life of this patent
Estimating the term…
Abstract
A syringe for hypodermic injections comprising a cylindrical body inside which a plunger is fitted so as to be slideable and actuatable by means of a stem that protrudes from an open end of the cylindrical body. An internally hollow needle is associated with the opposite end of the cylindrical body and is adapted to retract inside the cylindrical body, actuated by an elastic element, at the end of the injection.
Claims7
A syringe for hypodermic injections comprising:
- a cylindrical body having a front end, an open rear end, an internal surface and containing a plunger which is axially rigidly coupled to a stem by means of a tang;
- a hollow needle connected with said front end of the cylindrical body having a stem and a disk provided at one end of the stem of the needle and arranged on a plane lying transversely to a longitudinal axis of the cylindrical body;
- elastic means placed between said front end of the cylindrical body and said disk;
- locator means rigidly coupled to the internal surface of said cylindrical body and engaging said disk such that they are actuated by the advancement of said plunger, at the end of the injection, for a snap-action disengagement of the needle;
- wherein said needle is adapted to retract inside said cylindrical body, actuated by said
- elastic means, at the end of the injection.
3 more elements
Dependencies are inferred from the claim text.