SU1762937A1 - Disposable syringe - Google Patents

Abstract

Use: in medicine for injection. The essence of the invention: in the piston there are cavities covered with membranes with the possibility of their destruction. 1 il.

Description

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This invention relates to medicine, in particular to medical instruments.

Disposable syringes are known which are inferred by perforating the piston with a sharp rod. However, the destruction of this syringe depends on the will of the person, under certain conditions the syringe can be reused.

According to the technical essence, the disposable syringe is the closest to the proposed device. This syringe contains a hollow body with a needle holder and a piston placed in it, a membrane, a rod with an emphasis and a destructive thorn. The free end of the stem includes protrusions sequentially formed on it, with a spike attached to it, a washer and a neck, and the piston consists of two interconnected parts; in the part of the piston facing the needle holder, there is a cavity closed from the needle holder side, in which the free end of the rod is placed with the possibility of longitudinal movement inside it, the other part of the piston is made in the form of a detachable holder with a central hole covering the neck of the rod, and the diameter of the hole is smaller than the diameter of the washer.

However, this disposable syringe is quite complicated, has many parts, is difficult to manufacture.

The purpose of the invention is to simplify the design of the syringe.

The goal is achieved by the fact that in a syringe containing a hollow body in which a piston is placed consisting of two interconnected parts, in the first of which a cavity is blocked with a stem placed in it, the spike of which is installed with the possibility of perforation of the membrane. In this case, in the second part of the piston, the cavities are blocked by membranes, and in the first part, spikes are provided with the possibility of membrane perforation, while the rod is rigidly connected to the second part of the piston.

The proposed device differs from the prototype in that in the second part of the piston the cavities are blocked by membranes, and in the first part of the piston there are spikes installed with the possibility of perforating the membranes. The rod is rigidly connected to the second part of the piston. In this way, the design is simplified, guaranteed destruction of the syringe is achieved during the injection process, and drug leakage does not occur.

The drawing shows a General view of the proposed syringe. The disposable syringe contains a hollow body 1 in which a piston is placed, consisting of two interconnected parts 2 and 3, a rod 4. On the part

piston 2 has spikes 7, and on part of piston 3, which is rigidly connected to rod 4, cavities 5 are blocked by membranes 6. Rod 4 contains a spike 8 located in cavity 9 of piston 2. Cavity 9 is blocked by membrane 10. Interconnection of parts pistons 2 and 3 are provided with projections 11 and 12.

The syringe is assembled at the factory. Through technological holes in the rod (not shown in the drawing)

the piston with the rod is inserted into the bottom of the cylinder.

Use a disposable syringe as follows. Body 1 is filled with the medicinal solution by stem extension 4.

In this case, the membranes 6 and 10 remain intact. With the introduction of the drug, regardless of the will of the person, perforation of the membranes b and 10 spikes 7 and 8 occurs. In this case, the spikes 7 seal

the holes formed, since they are made by congruent cavities 5, which prevents the loss of the drug substance. When you try to refill the syringe, the piston is depressurized.

The reuse of the syringe is impossible, while its design, compared with the prototype, is simplified.

Formula of invention

A disposable syringe containing a hollow body housing a piston consisting of two interconnected parts, in the first of which a cavity is closed with a membrane with a stem accommodated in it, the spike of which is mounted with the possibility of perforating the membrane, in order to simplify constructions, in the second part of the piston, the cavities are blocked by membranes, and in the first part, spikes are possible with perforation of the membranes, while the rod is rigidly connected to the second part of the piston.

Claims (1)

Claim A disposable syringe containing a hollow body in which a piston is placed, consisting of two interconnected parts, the first of which is a cavity covered by a membrane with a rod located in it, the spike of which is installed with the possibility of perforation of the membrane, characterized in that, in order to simplify the design, in the second part of the piston, cavities overlapped by the membranes are made, and on the first with the possibility of perforation of the membranes, spikes are made, and the rod is rigidly connected to the second part of the piston.