SU1747056A1 - Crown hook - Google Patents

Abstract

Use: allows you to increase the impact force when removing the crown. The purpose of the invention is to provide an opportunity to increase the impact force. In the striker 5 of the crown remover, there is a longitudinal through channel 6. in which the shank 7 of the tool 8 is located. On the side surface of the striker 5 there is a cone-shaped groove 9, which interacts with the pushrod 15. The latter is movably mounted on the descent lever 12. A push rod 15 is located on the push rod 15. When the sleeve 16c contacts the crown 1, the pusher 15 disengages from the drummer 5 and under the action of the spring 10, a sharp blow is struck on the support sleeve 3. In this case, the blow is transmitted to the hook 18 of the tool 8, which cuts the crown. 1 hp f-ly, 1 ill.

Description

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This invention relates to medicine, in asthma to orthopedic dentistry and to the removal of dental crowns.

A crown picker is known, comprising a housing with a support sleeve and a through window, a spring loaded drummer, a pusher and a tool.

However, this crown picker is traumatic and unreliable in operation.

In addition, it is not convenient for removing crowns from the teeth of the lower jaw.

Closest to the present invention is a corona picker, comprising a housing with a bearing bush and a through window, a spring-loaded hammer, a trigger with a hinged pusher, and a tool.

However, due to the small mass of the impactor, the known crown picker does not provide sufficient impact force to remove the crown and adjust the impact force, it cannot be used to remove crowns from the upper and lower jaws from one position convenient for the doctor.

The purpose of the invention is to provide an opportunity to increase the impact force.

The drawing schematically shows a corona picker, a general view.

The crown collector includes a housing 1 with support sleeves 2 and 3 and a longitudinal groove 4 on the generator. A drummer 5 is movably placed in housing 1. In the latter, there is a longitudinal through channel b for passing through it and bushings 2 and 3 of the shank 7 of tool 8. On the side surface of the impactor 5 there is a conical groove 9. A spring 10 is placed between the end of the impactor 5 and bush 2. squeeze. On the sleeve 3 movably by means of a hinge 11 is fixed the lever 12 of the descent. In the latter, a rod 13 is placed, spring-loaded with a spring 14. The hinge 11 is made with a beveled surface against which the rod 13 abuts. A pusher 15 is movably fixed on the lever 12. On the latter there is a sleeve 16 which can be moved and fixed relative to the pusher 15 by means of a screw 17. Spring 18 is connected at one end to the sleeve 16, and the other to the sleeve 3.

Crown pickup works as follows.

Depending on which jaw to manipulate,

insert the shank 7 of the tool 8 into the hole at the end of the body 1 from the axis 11 side, then the blow is directed downwards (upper jaw), or into the hole on the opposite side (lower jaw), then the blow is directed upwards, the tool 8 is inserted into the shank 7 and fix it (the tool can be executed at the same time with the shank). Then the end hook 19 of the tool 8 captures the end of the crown of the tooth and presses the lever 12 to the body 1. At the same time, the pusher 15 enters the groove 9 of the striker 5 with its working end and displaces the latter to the extreme position, compressing the spring

10. When the sleeve 16 is in contact with the housing 1, the pusher 15 disengages from the hammer 5 and under the action of the spring 10 produces a sharp blow to the supporting sleeve 3 or 2. In this case, the blow is transmitted to the hook

19 tool 8, tearing off the crown. After that, the spring 14 returns the lever 12 to its original position under the action of the rod 13, which interacts with the beveled surface of the hinge 11. The spring 18 reverts the pusher 15 to its initial position.

The impact force is controlled by moving the sleeve 16 along the pusher 15. In the predetermined position, the sleeve 16 is fixed with a locking screw 17.

Claims (2)

Claim 1. Crown pickup, comprising a housing with a support sleeve and a longitudinal groove on the generator, a spring-loaded drummer, a descent lever with a hinged spring-loaded pusher, characterized in that, in order to provide an opportunity to increase the impact force, the longitudinal end-to-end was made in the drummer a channel for positioning the tool shank, on the side surface of the striker there is a cone-shaped groove for interacting with the pusher, the latter being fixed on the descent lever and provided with a sleeve for interacting with the body, and the body is equipped with an additional support sleeve for mounting the tool from the opposite end. 2. The crown picker according to claim 1, of which is with the fact that, in order to regulate the impact force, the sleeve on the pusher is mounted with the possibility of movement and fixation relative to the latter.