DE1250054B - Zahnregulierungsvorrichtung with mutually displaceable expansion plates half - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

Int. CL:

A61c

GERMAN

PATENT OFFICE

EDITORIAL

German class: 30b-9

Number. 1250054

File number: Sch 32679IX d / 30 b

Filing date: January 30, 1963

Date of launch: September 14, 1967

The invention relates to a tooth regulating device in which two mutually displaceable Expansion plate halves each with one, one or more adjusting spindles, made of plastic existing mother body is embedded.

In a known device there is a counter-rotating fine thread spindle and the associated mother body made of metal parts produced by machining. This training however, has the disadvantage that the spindle due to the tolerance between the spindle and the nut thread can only do one active movement. One for the controllable process of an orthodontic Treatment required passive braking possibility, d. H. a backup of the spindle setting against unwanted third-party adjustment, is not available.

Nut bodies made of plastic are also known in which the threads for the spindle go through Casting a polymerizing material (acrylate) can be produced. Due to the brittleness of the material However, there is a high risk of breakage, so that the mother can only absorb low loads.

Furthermore, a plastic bushing with a subsequently cut thread is known as the nut body, which is inserted in the cylindrical bore of a screw body made of metal. However, this does not prevent a certain amount of play between the nut and the spindle. Another The disadvantage is that the cylindrical threaded bushing in the cylindrical bore of the screw body is not secured against rotation and with a tightly engaging spindle with its Screwing with turns.

In contrast, the invention consists essentially in the fact that the plastic sleeve consists of a hard plastic existing nut bodies for the adjusting spindles by compressing them in the radial direction pressed into the threads of the spindles and by means of a deformable one surrounding it and metal jacket with lateral retentions on its jacket surfaces against rotation is secured.

The subject matter of the invention has the further advantages that it is costly in terms of material and time can be produced in a particularly economical production, since the otherwise necessary machining There is no need for deformation or subsequent machining of the nut parts.

In the drawing, two exemplary embodiments of the subject matter of the invention are enlarged Scale shown. It shows

Tooth regulation device with against each other
sliding expansion plate halves

Applicant:

Rudolf Scheu, Letmathe, Am Burgberg 20

Named as inventor:
Rudolf Scheu, Letmathe

F i g. 1 an embodiment of a nut body, in a longitudinal section,

F i g. 2 shows a cross section along the line H-II of FIG. 1,

so F i g. 3 or 4 a two-spindle nut body in start and end position.

The expansion screw intended for adjusting the expansion plate halves (not shown) is in accordance with F i g. 1 and 2 from a in the middle a Spinas delkopf 3 having metal spindle, whose with Right-hand and left-hand thread provided part 1, 2 each in one, only shown in the spindle part 1 and in Mother body 4 embedded in the expansion plate halves can be screwed in a manner known per se.

The new nut body 4 originally consists of a cylindrical sleeve made of hard plastic, which are pushed onto the spindle part 1 or 2 and by compression deformation into the threads the spindle parts 1, 2 is pressed in. In this way a nut body is formed in which the spindle is reliably secured against loosening in every screwed-in position.

Before it is deformed, the plastic sleeve also absorbs greater tensile stresses Provided casing, which consists of a cylindrical sheet metal casing 5 in the exemplary embodiment. If the nut body 4, 5 formed in this way is pressed together in the radial direction by suitable punches, so penetrates, as mentioned, the plastic 4 into the threads of the spindle and forms the Nut body which is held together by the sheet metal jacket 5. The sheet metal jacket is advantageous deformed in such a way that, when pressed together, projections forming retentions on its outer surfaces (Longitudinal flanges 6) or indentations 7 arise, which rotate when the spindle 1, 2 is screwed together impede.

709 647/4

In the F i g. 3 and 4 is a two-spindle expansion screw in the starting position (FIG. 3) or in the end position (FIG. 4), in which the two Spindles 10, 11 and 12, 13 are embedded in the mother bodies 14, 15 designed according to the invention. With this expansion screw, the otherwise required guide bolts are dispensable. This is not only enables particularly economical production, but on the one hand the lateral stability is also improved, on the other hand, the expansion is considerably increased, which is the case with those provided with guide bolts Expansion screws is severely limited as a result of the bolts leading only on one side.

Claims (1)

Claim: Tooth regulation device in which two mutually displaceable expansion plate halves each receiving one or more adjustment spindles made of metal and made of plastic Nut body is embedded, characterized in that the nut body consisting of a hard plastic plastic sleeve (4,14,15) for the adjusting spindles (1,2) by pressing in the radial direction into the threads of the spindles (1, 2) pressed in and by means of a surrounding, deformable and lateral on its lateral surfaces Retentions (6, 7) having metal jacket (5) is secured against rotation. Considered publications:
German utility model No. 1 788 918. 1 sheet of drawings 709 647/4 9.67 Bundesdruckerei Berlin