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US 2004/0006313 A1Published application
Retractable safety syringe cylinder
OwnerLai-Wen Chianinventor
Life of this patent
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Abstract
A retractable safety syringe cylinder has a structure which precisely hooks the syringe needle for retracting the syringe in the syringe cylinder for bending A hole seat at a lower end of the syringe needle is matched to a hook body at a top surface of a rod cap of a push rod. After pushing injection liquid, the two are engaged so as to control the displacement of the syringe needle. Thus, the waste from the syringe is controllable and the operation is convenient.
Claims5
A retractable safety syringe cylinder comprising a syringe cylinder, a syringe needle, and a push rod;
- characterized in that:
- an upper end of the syringe cylinder has a syringe connecting seat and the syringe connecting seat has a positioning hole at a center thereof;
- an upper end of the syringe needle is a needle tube and the lower end thereof is a needle;
- a lower end of the needle has a hole seat;
- a lower end of the hole seat is a slot;
- a hook chamber is adjacent to the slot;
- the volume of the hook chamber is slightly larger than that of the hook body;
- the hook chamber has two transversal hook blocks;
- a center of the hole seat is a channel hole;
- a channel hole penetrates through the needle body so as to communicate to the needle tube;
- and
- a top of the push rod has a hook body;
- a hook body has two wedge buckles which are formed as a two stage structure;
- thereby, the syringe needle passes through the positioning hole of the syringe connecting seat of the syringe cylinder;
- the guide hole in the hole seat of the syringe needle is helpful to guide the injection liquid.
12 more elements
Dependencies are inferred from the claim text.