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Safety syringe Patent

Auto-disable safety syringe

An auto-disable safety syringe including a needle, a needle seat, a plunger, and a barrel. A cover of a needle seat chamber formed in the needle seat is provided with a splined hole having teeth and grooves. The needle seat has a ring block and an outer wall with splined teeth capable of passing through the grooves. A locking groove is formed in an inner cavity of the ring block and a locking head is formed on a connecting head to form a locking mechanism. Spiral grooves on the inner cavity engage with protrusions on the connecting head. When the locking head and the locking groove are interlocked and the plunger is retracted, the needle seat and the needle are retracted inside the barrel together. The syringe protects both patient and medical staff, is simple in structure, convenient to use and destructible.

Safety syringe

A safety syringe includes a flexible holder-supporting seat that is sleeved around and that clamps a needle holder within a front end portion of a syringe barrel. A flexible sealing member seals an open front end of a plunger so as to define a vacuum chamber in the plunger. When the plunger moves within the barrel to a front limit position, a holder-retaining front portion of the sealing member engages and retains the needle holder thereon, and the plunger pushes the holder-supporting seat to separate from the needle holder such that the sealing member and the needle holder move rearward within the syringe barrel due to negative pressure produced in the plunger, thereby retracting a needle into the syringe, barrel.

Interchangeable needle safety syringe

The present invention is a safety syringe for use with a plurality of interchangeable needles. The plurality of needles may be inserted by the user into the safety syringe for use. In operations, the user selects the desired needle, e.g., a needle having a particular gauge or size or of a particular type. The user inserts the needle into a safety syringe comprising a barrel, a needle assembly area located within or attached to the barrel and a plunger. The needle couples to the syringe by a number of means. For instance, a locking mechanism may be used by which a needle hub located within the needle assembly has an area adapted to mate with a corresponding area on the needle. Or, the needle may be formed as part of a separate needle assembly, whereby the user will place the entire needle assembly onto the end of the syringe barrel. During use, the user operates the syringe, using one hand to depress the plunger, which ultimately causes a spring to propel the needle into the barrel of the syringe.

Safety syringe

A safety syringe has a hollow barrel, a plunger, a connector, a plug and a needle hub. The plunger has a protrusion extended from the plunger and along a longitudinal axis of the plunger. The connector is mounted around the protrusion of the plunger. Multiple limit stubs and multiple curved limit channels communicating with a corresponding notch with an inclined side-wall are respectively formed on the connector and a connecting chamber in a connecting tube of the needle hub. When the plunger is being pushed towards the needle hub, the multiple limit stubs respectively pass through the corresponding curved limit channel and are contained in the corresponding notch. The inclined side-wall of the notch will stably connect the limit stub so the plunger can stably retract the needle hub in the hollow barrel.

Auto-disable safety syringe
Universal safety syringe
Safety syringe with retracting needle
Safety syringe having a needle to be retracted and canted within a protective sleeve
Retractable safety syringe with push rod in plunger

PAT. NO. Title
1 7090657 Auto-disable safety syringe
2 7074207 Safety syringe
3 7014622 Interchangeable needle safety syringe
4 6979314 Safety syringe
5 6976975 Safety syringe
6 6949085 Safety syringe assembly
7 6936027 Safety syringe
8 6929622 Safety syringe cylinder
9 6926697 Adaptor for converting a non-safety syringe into a safety syringe
10 6921382 Retracting device for a safety syringe
11 6911021 Safety syringe for taking blood
12 6846301 Disposable safety syringe
13 6827704 Safety syringe
14 6808512 Safety syringe
15 6800067 Two-component safety syringe
16 6761707 Safety syringe having needle holder capable of fixing secured and easy to drawback
17 6761705 Safety syringe device with a needle bending device
18 6752784 Labor efficient safety syringe
19 6752782 Automatically retractable safety syringe
20 6733475 Safety syringe of easy to pull out the plunger
21 6719722 Safety syringe
22 6716199 Safety syringe system
23 6712788 Automatic safety syringe
24 6712787 Self destructive safety syringe
25 6706015 Safety syringe
26 6702784 Limited injection cycle safety syringe
27 6669667 Safety syringe
28 6669666 Safety syringe
29 6663591 Disposable safety syringe
30 6656165 Disposable safety syringe
31 6626863 Safety syringe
32 6616637 Fluid collection safety syringe
33 6616636 Disposable safety syringe which leaves no residual injection
34 6589209 Safety syringe with retraction trunk
35 6530906 Safety syringe having a restrictively rotatable plunger
36 6530903 Safety syringe
37 6527742 Safety syringe
38 6514229 Safety syringe with a needle sleeve
39 6488656 Safety syringe
40 6478779 Assembly of needle holder and barrel of safety syringe
41 6475194 Safety syringe
42 6461328 Safety syringe
43 6436076 Needle holder positioning structure for a safety syring
44 6432088 Safety syringe with a needle sleeve lock
45 6432082 Safety syringe
46 6413236 Automatically retractable needle safety syringe
47 6409704 Retractable safety syringe
48 6409703 Safety syringe for intravenous injection
49 6387079 Safety syringe
50 6342045 Safety syringe

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