SU939015A1 - Pneumatic needless injector - Google Patents

Description

(54) PNEUMATIC INSULATED INJECTOR

one

The invention relates to the veterinary technique and will find application in mass tmktsi x.

Known pneumatic needleless Inmk Topi containing a head with a bench, a container for the drug, a housing with a piston and a working chamber, a metering device, a handle with a trigger and a trigger mechanism made in the form of a spool cylinder with a channel for compressed air inlet and supplying it to the working chamber and spring loaded spool (1.

The disadvantage of the known injector is that with injections of cattle requiring a jet of great power (considerable effort is required from the operator on the trigger, since the compressed air is injected directly into the channel by the operator.

The goal of the Shadow is to reduce the force on the trigger.

The goal is achieved by the fact that in a pneumatic airless injector that holds a head with a nozzle, a container for iapenaiMTa, a piston with a piston on a working chamber, which provides a knob and a trigger mechanism made in the form of a slide valve with a channel compressed air and supply it into the working chamber and spring-loaded spool, the latter is made with an axial cylindrical cavity and is equipped with a spring-loaded plunger with an annular groove and

10 by an abutment mounted in the cavity of the spool with an obravokokm between them an annular chamber, with the abutment and springs located on opposite couds, and in the spool there is a groove which is connected

Claims (1)

The $ 1 channel is located between the anvil and the plunger by an annular chamber, and in the middle part of the zolotoik there are two symmetric colas (evrotic holes that are connected by bypass holes with the axial cylindrical cavity of the slide, while the distance between the bypass holes is less than width plunger grooves., F g, I shows the proposed device, general view; fit. 2 - trigger mechanism. The device consists of a head in which a worker 1 is placed, forming a working cavity 2, a housing 3 and a handle 4 in which pus A new mechanism 5. A valve 6 and a nozzle 7 are installed in the head. The cavity 2 is connected through a valve 8 and a pipe 9 with a container 10 for the preparation. In building 3 there is a sleeve 11 connected by means of a threaded connection to the rod 12, on which the piston 13 is mounted. , a return spring 14, which presses the piston against the cover 15. In the hollow part of the stem, there is a plug 16 connected to the rod with a pin 17 on which the flywheel 18 is fastened. The head is connected to the injector body with a nut 19. The trigger mechanism consists of a spool cylinder 20 s. channel 21 of the inlet compressed into Air and a channel 22 for supplying compressed air to the working chamber 23 of the housing 3. In the cylinder 20 there is a sub spring 1 spool 24, in the cavity of which a spring-loaded plunger 25 and an emphasis 26 are located, between which an annular chamber 27 is located. On the plunger there is an annular pin 28 the spool is an annular groove 29. There is a cavity 30 in the spool cylinder, connecting the compressed air inlet 21 and the annular groove 29. On the spool there are two symmetrical grooves 31 with overflow holes 32 connecting the spool cavity with analyte 21 and 22. The distance between the bypass holes smaller than the width of the bore of the plunger. A trigger 33 is mounted on the spool to activate the trigger. There is also a hole 34 on the spool, which connects the annular chamber 27 to the groove 29, and the opening 35 to the atmosphere. The operation of the device is carried out as follows. When the trigger 33 is pressed, the inlet spool 24, making a working stroke, is set to the working position. In this case, the groove 29 is aligned with the cavity 30 connected to the compressed air supply duct 21. The air entering through the opening 35 into the chamber 27 in front of the plunger 25 displaces the latter to the right, compressing the spring, with the result that the groove 28 is installed between the openings 32, connecting them. Compressed air through the holes enters the channel 22, 3atfflbm connected with the working cavity 23. The piston 13 under the action of compressed air compresses the spring 14 and through the guitar 12 and the sleeve And moves the working plunger 1 with high speed and force determined by the air pressure. Due to the fact that the movement of the plunger 25 is carried out directly by the air stream, the channel 21 is instantaneously connected to the channel 22, which provides speed and power parameters at the initial moment of launch. When releasing the start button plunger 25 and the inlet spool 24 under the influence of springs occupy the initial position. The working cavity 23 of the housing 3 through the channel 22, the holes 32 co. united with the atmosphere, and the channel 21 for supplying compressed air is blocked. With this, the piston 13 is returned to its original position by the action of the spring 14. The working plunger 1, moving, creates a discharge in the cavity 2, into which from the tank 10 through the pipe 9 through the valve 8 the drug enters. When the trigger is triggered, the dose of the drug through the valve 6 and the nozzle 7 is pushed out by the working plunger. A pneumatic needleless injector comprising a head with a nozzle, a container for the preparation, a housing with a piston and a working chamber, a metering device, a handle with a trigger and a trigger mechanism made in the form of a spool cylinder with compressed air inlets and supplying it to the working chamber and spring loaded spool, characterized in that; that, in order to reduce the force on the trigger, the spring-loaded spool is made with an axial cylindrical cavity and is equipped with a spring-loaded plunger with an annular groove and an emphasis installed in the cavity of the spool with the formation of an annular chamber between them, and the stop and spring are located at opposite ends, and in the spool an annular groove is made, which is connected by a channel with an annular chamber located between the anvil and plunger, and in the middle part of the spool two symmetrical annular grooves are made, which connected by bypass holes with an axial cylindrical cavity of the spool, while the distance between the bypass holes is less than the width of the groove of the plunger. Sources of information taken into account in the examination 1. USSR Author's Certificate No. 341492, cl. A 61 M 5/30, 1970. 30 GW 31 3 / g 24 Cpuz.t