CZ283514B6 - Accurate dosing device of liquids - Google Patents

Abstract

Exact liquid doser suppressing a measured dose of liquid by the piston of an injection jet (8) the rear part of the body (5) of which is equipped with a closure (6) with a hole with the same diameter as the outside shell of the injection jet (8). The front part the body (5) is equipped with a hole for the passage of the cylindrical part of the anchor (3) on the end of which there is screwed nut (1). The anchor (3) passes to the transparent pocket the opposite end of which is equipped with a spring segment (4) the peripheral cogs of which fit in a minimum of two grooves on the inside diameter of the body (5) with the created thread fitting into the prolonged part of the spring segment (4) equipped with the thread.

Description

Precision fluid dispenser

Technical field

The invention relates to a device for the application of perfectly accurate small doses of fluids with a predetermined volume of fluid to be applied, in particular for the administration of therapeutic solutions.

BACKGROUND OF THE INVENTION

Previously known applicators of small amounts of fluids, such as insulin preparations, are constructed such that the amount of dose administered is dependent upon the rotation of the thrust element, which practically means that the dose is dependent on the extent of the rotary motion of the piston. The second known small dose applicator operates on the principle of piston pressure without the possibility of preselection of individual doses and the total amount of the dosed fluid is controlled only by the number of presses. However, it is only a multiple of the amount given by a single press. A third known type of dispenser, made according to CZ published PV 268-95, allows to preset the planned volume of the medicament dose by turning and to dispense by pushing the pressure head. The disadvantage, however, is the need to fill the syringe outside the dispenser. The disadvantages of the previous applicators are that in the first one the application of the fluid by the rotational movement is influenced by the subjective sensation when rotating, and thus the application itself is considerably impractical. The second type of dispenser has the disadvantage that the dispenser still gives the same predetermined quantity of fluid that cannot be changed for individual individual needs.

SUMMARY OF THE INVENTION

These drawbacks are overcome by a precise fluid dispenser displacing a fluid dose by means of a syringe plunger according to the present invention, wherein the body is provided at the rear with a cap having an opening having a diameter like the outer housing of the syringe. In the front part the body is provided with an opening for passing through the cylindrical part of the collet, at the end of which the nut is screwed. The collet becomes a transparent sleeve which is provided with a spring segment at the opposite end, whose circumferential teeth fit into at least two grooves on the inside diameter of the body. There is an internal thread on the body that fits into the threaded extension of the spring segment. The body is preferably provided with a scale. The nut is provided with a cap.

An advantage of this embodiment of the dispenser is that the syringe is filled through the dispenser. When the dispenser is fully filled, it will last for a few days. The dispenser allows the preselected dose to be checked mechanically and optically. Dosing is much more accurate than a single injection technique. Administration of the drug to patients is possible by means of a dispenser in any environment.

Overview of the drawings

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a dispenser in longitudinal section in an axonometric embodiment; FIG. 2 shows a filled assembly provided with a cap.

- 1 GB 283514 B6

DETAILED DESCRIPTION OF THE INVENTION

The dispenser according to FIG. 1 consists of a body 5, which is provided with an opening closure 6 at the rear. Its diameter coincides with the diameter of the outer casing of the syringe 8. In the front part, the body 5 is provided with an opening for the passage of a cylindrical part of the collet 3 which has a nut L screwed at its end. 4, whose circumferential teeth engage at least two grooves on the inner diameter of the body 5. This body 5 has an internal thread which fits into the threaded extension of the spring segment 4. The body 5 is further provided with a scale 9. A cap 7 is inserted on the nut 1.

To operate the dispenser according to FIG. 1, an empty syringe 8 is inserted into the dispenser in the initial position and the nut 1 is fastened in the collet. By rotating the body 5, the solution is sucked into the syringe 8, whereby the dispenser is ready for use. By rotating the body 5 in the opposite direction, the desired syringe dose block 8 is preset, which can be deduced from the printing on the syringe 8 and the number of sound and tactile effects produced by the rotation of the body 5. The application is carried out by pushing the extended plunger This step may be repeated until the solution in syringe 8 is depleted.

Claims (3)

PATENT CLAIMS A precision fluid dispenser displacing a metered dose of fluid through a syringe plunger, characterized in that the body (5) is provided at the rear with a cap (6) having an opening having a diameter of the outer shell of the syringe (8), and the body (5) is provided with an opening for passing through the cylindrical part of the collet (3), at the end of which the nut (1) is screwed, the collet (3) becomes a transparent sleeve which is at the opposite end provided with a spring segment (4) they fit into at least two grooves on the inner diameter of the body (5), and a body thread is formed on the body (5) which fits into the threaded extension of the spring segment (4). Precision fluid dispenser according to claim 1, characterized in that the body (5) is provided with a scale (9). Precision fluid dispenser according to claim 1, characterized in that the nut (1) is provided with a cap (7).