DE7012254U - BLUNT MODEL PEN. - Google Patents

Description

Die model pen

The innovation concerns a Stuepfuodell pen, in the professional world also called dowel pin, as it is used in dental technology for the production of step models.

£ s are £ ar-iis Stiispfssden ^ stifts ifc ^ ksssnt <j £ «ordsn, feel ue ^ cen the basic form consists of a" square-shaped "and iiiaiea tapering part. On the front of this trapezoidal part which tapers towards the rear there is a square pin head in which there is a hole in which a saw blade-like retention part is inserted.

One such embodiment, however, is manufacturing technology
disadvantageous because the insertion of the retention part requires three operations which make the manufacture of the dowel pins more expensive
do. It is necessary in the square head of the pen

to make a hole, to insert the retention piece and then to press the square head laterally so that the retention piece 1 gets a firm hold in the hole of the square pin head. A further disadvantage is that known dsr stump model pin made of rectangular naterial prepared 1st and both showing the taper of the basic shape and the four-sided pin head, a manufacturing method verteuerndes work.

The innovation has set itself the task of giving the stump model pen such a shape that it is possible to put it in one automatically running working process the die model pin or also called Dowel Pin, inexpensive to manufacture in large numbers.

After four years you will have an inventive advantage achieved in that the stump model pin from one with one Flattened frustoconical base part exists which is followed by a pin head with a smaller diameter and the pin head ends in a threaded fixing pin. According to a new type of execution The 4-way fixing pin is smaller in diameter than the pin head and has a steep thread along its entire length. Appropriately, the Steffcewinda runs in the vicinity of the pen head in a a groove that represents a natural predetermined breaking point.

701221423.7.70

In a further embodiment of the innovation, it is possible that To provide adjusting thread over its entire length or only partially with flattened areas. Instead of the flattened areas, however, notches can also be made in the thread, it also being possible to give the notches the structure of a dovetail groove.

Appropriately, the pin head is provided with knurling over part or all of its length.

The innovation is explained in more detail on the basis of the illustrations showing the exemplary embodiments. It mean

Fig. 1 is a view of the stump node pin in greatly enlarged form.

Fig. 2 is a section through the base according to the section lines H-II

3 shows a possible cross-sectional shape of the fixing Pin by flattening and

Fig. 4 _s with the longitudinal grooves could also have the form of a dovetail groove is another cross-sectional shape of the fixing pin with longitudinal grooves.

In accordance with the exemplary representation is the stump model pin for the production of truncated models in

Dental technology from a base part 1, the truncated cone shape of which is provided with a flat 2. At the point with the largest diameter, the base part 1 ends in a pin head 3 with a smaller diameter, which is provided with knurling 4 in part or over its entire length. This pin head 3 has in turn, an extension that represents a fixing pin 5.Der Fixing pin 5 is provided with a coarse thread 6 or knurling. At the transition from the fixing pin 5 to the pin head 3 or at least in the vicinity of the transition a notch 7 is provided, which in practice when using stump models as The predetermined breaking point is used.

According to FIGS. 3 and 4, it is also possible, the high helix thread 6 of the fixing pin 5 to be provided with flats 8 or with notches 9.

With these stump model pins according to the innovation, it is possible to produce stump models without the need for auxiliary parts such as For example, model pen holders are required after the Completion of the die model the die eiodell pens are used simply broken off at the predetermined breaking point 7.

as. _

Claims (6)

Protection claims 1. Die model pen for the production of die models in the Dental technology, characterized in that a Stuopfaodell pin consists of a truncated conical base part (1) provided with a flattening (2), to which a pin head (3) with a smaller diameter adjoins and the pin head runs out into a threaded fixing pin (5). 2. Stunpf model pen according to claim 1, characterized in that that the fixing pin (5) is smaller in diameter than the pin head (3) and the fixing pin has a steep thread (6) is provided. 3. stump model pen according to claim 2, characterized in that the fixing pin (5) is provided with knurling. 4. Stunpfsjodell pen according to claim 1 and 2, characterized in that the coarse thread (6) on the fixing pin (5) in the Near the pin head (3) runs out into a groove (7) and this represents a natural predetermined breaking point. Λ * B I β 5. die model pen according to claim 2, characterized in that that the high helix thread (S) or the knurling has flats (8) over its entire length. 6. Stunpfmodell pen according to claim 2 or 4, characterized in that the coarse thread (6) with longitudinally extending Notches (9) is provided. Die model post according to claim 5 »characterized in that that the longitudinal Einke: Have a b-tail-shaped groove. w that the longitudinal notches form the shape of a 8. step model pen according to claim 1 and 2, characterized in that the pin head (3) partially or all over. Length has a surface provided with a knurling (4). April 1, 1970 j 8 Munich 2, Rosental 7, 2nd Autg. Part addr. leinpat Munich Telephone (0811) 2Ä05J8? Poslsäiedc Konlo: Munich 22045 the Our sign Blehard Sanier Longing claims: 1. Stuiapiiaodell-Stlfi for the production of stump models In the Zahnteehnlk on one with a flat (2) provided Finished with a truncated cone (1), a salt lesser on the sieve Pin head with a diameter of <3), which is then inserted into a Fixing part (5) runs out, characterized in that the Flzlertell (5) pen-shaped, a smaller Durela knife than the pin head (3) and on its circumference ait a Gev / Inde or »old a banding is provided. 2. Die model pen according to claim 1, characterized in that the fixler pin (5) has a high-helix thread (6) is provided 3. stump model stiit according to claim 2, characterized in that that the high-helix thread (6) aio Fixlerstift (5) in the vicinity of the pin head (5) into a natural predetermined breaking point MlIe (7) expires. 7 β 1 4, Stuispfsalell-Stift npeh one of the irscrHche '»to 5-,; characterized in that Steilgetilnds (ό) or Lündeung on; their rests have flattening (o). i ?. Stucpfmodell-Stiit after Insprueh 4. ^ n draws that the steep slope (6) old ± iigs running notches (9) is provided. 6. Stump! Eouell pen according to claim i, characterized in that the longitudinally extending sink notches have the shape of a swallow-tailed hat.