SU967877A1 - Liquid dispenser - Google Patents

Description

(54) LIQUID DISPENSER

This invention relates to a technique for dispensing liquid materials from packages and can be used in the medical and food industries.

A liquid dispenser is known, which contains a plug with openings for the discharge of a liquid, provided with a tube for the passage of air into the container.

In addition, the dispenser includes a stopper chamber and a device to prevent air from entering the bottle, which contains the diaphragm and the tube installed in it for supplying liquid to the stopping chamber. The outflow of liquid from the bottle is prevented by air from entering the bottle through the outlet chamber. The entrance to the shutter chamber is isolated from the main flow of liquid passing through the outlet chamber 11.

The disadvantage of this device is that the dosing of the fluid passing through the outlet chamber is performed according to the time of filling the shutter chamber when the vessel is turned down with the shutter down, when the level of the air-conduit tube is blocked by the liquid level in the outlet chamber and the liquid

the bottle. The filling time of the sealing chamber, and, consequently, the dose of fluid passing through the discharge

The camera over this time depends on the viscosity of the latter. In the dispensing of aqueous, aqueous-alcoholic, and oil-based liquid drugs with significantly different viscosities,

40 dose sizes vary considerably, which is unacceptable, especially when dosing potent drugs.

In addition, the device does not allow adjustment of the dose.

15 The aim of the invention is to improve the accuracy of dosing.

This goal is achieved by the fact that a liquid dispenser containing a plug with openings for liquid exit, equipped with a tube for the passage of air into the container, is provided with a measuring device adjacent to the plug, communicating through the openings in the plug and through the tube

25 with a vessel, and through a hole located at the maximum filling level of the measuring device, with the atmosphere, and having a drain hole in the bottom, whose area is less than the sum of the areas of the holes in the cork. Fig. D shows a closure for containers with a dosing device, a longitudinal section; in Fig.2 a section aa in Fig.1; Fig. 3 shows the closure in the dispensing position, the moment of filling of the chamber; figure 4 - the shutter at the time of cut-off dose; in FIG. 3, the closure at the time of termination of the dosage in FIG. 6b is the closure after termination; Fig. 7 shows an embodiment of a closure for containers with a device for dosing; Fig, 8 section bb in Fig.7. The closure for containers with a dosing device consists of a plug 1 and a measuring device 2 inserted into the neck of the vessel and fitted on the plug 1. The upper end of the plug 1 and the inner surface of the measuring device 2 form the metering and shuttering chamber 3. The plug 1 is provided with an air duct pipe 4 for passage air into the tank, liquid holes 5 for the liquid to exit the tank and grooves b for the passage of air into the metering and shuttering chamber 3. In the bottom of the measuring device 2, a drain hole 7 is made to drain the dose of liquid from the metering and shuttering chamber 3, The drain hole 7 in the bottom of the measuring device 2 is smaller than the area of the holes 5 in the plug 1, and the air tube 4 is sized to hold the fluid that has entered it when the hydraulic valve is formed in the tank down position and drain out of this fluid in the tank position shutter up. The container shutter is equipped with a dose adjustment device made in the form of an end cam 8 of the plug 1 and a protrusion 9 interacting with it on the outer surface of the measuring device 2. The device for adjusting the dose can be made in the form of projections 10 on the internal surface of the measuring device 2 and of the cavities 11 on the external surface tube 1, interacting with each other (Fig.7 and 8). The dispenser dispenses through the volume of the dose, the liquid level of which blocks the air supply to the container. The shutter operates as follows. The container is turned 180 shutter down. At the same time, air enters through the air grooves 6 into the dosing-stopping chamber 3 and from it through the air tube 4 in the form of bubbles into the container, and the liquid is poured out through the holes 5 of the stopper 1 into the dosing-shuttering chamber 3 and from it through the drain hole 7 at the bottom of the measuring device 2 is poured out (Fig. 3). Since the area of the drain hole 7 is significantly less than the sum of the areas of the liquid holes 5 of the plug 1, the filling of the dosing chamber 3 takes place much faster than draining it, after a short period of time the liquid level in the dosing and shuttering chamber 3 reaches the outer end of the air tube 4 blocks the flow of air through it into the tank (figure 4). The remaining air from the air tube is lifted into the container, and the liquid fills the tube 4, creating a hydraulic shutter, preventing air from entering the container. When the level of the liquid in the metering and shut-off chamber 3 is lowered, as a result of it flowing out through the drain hole 7, air is supplied to the air pipe. 4, but it cannot penetrate inside the container through a fluid-filled tube 4 filled with liquid due to its capillary dimensions. On the other hand, the liquid from the air guide tube 4 cannot be poured into the dosing-shuttering chamber 3, and the air cannot enter the container through the holes 5, since the difference in the levels of the holes 5 and the outer end of the air guide tube 4 cannot ensure the outflow of liquid from the tube 4 (fig.Z). After draining the entire dose of fluid from the dosing-shuttering chamber 3, the container is turned to its original position. In this case, the liquid, which was located in the air tube 4,. is discharged into the container and the shutter is again ready for operation (Fig. 6). To adjust the dose of liquid, the volume of the dosing and shuttering chamber 3 is changed by turning the gauge 2 relative to the stopper 1, while the protrusion 9 of the measuring device 2 slides along the surface of the end cam 8 of the stopper 1 (Fig. 1). Thus, smooth dose adjustment is carried out. In the embodiment of the closure for the container shown in FIG. 7, a stepwise adjustment of the dose occurs. When moving. Mernik 2 along the plug 1, the projections 10 on the inner surface of the measuring device enter the valleys 11 of plug 1, fixing the measuring device 2 and plug 1 relative to each other in a certain position corresponding to the required dose. The presence in the gate only d-vuh parts - cork and installed. on it the measuring device, providing simplicity of construction, facilitates the assembly of the valve and allows to mechanize and automate the process of assembling the valve and capping the vessel. The shutter is equipped with a controlled dose adjustment, which allows it to be widely used.

for dosing different drugs and adjusting the dose depending on the degree of the disease and the age of the patient.

Claims (1)

1. Patent of the USSR 520902, cl. In 65. D 47/06, published 1976. Phi.1 3 2 fPuz.i fut.5 C 4 7