DE1907658A1 - Head of dental elbows - Google Patents

Description

16 976 Düsseldorf, the 1 ^. Feb. 1969

Dentalwerk Bürmoos Gesellschaft m.b.H.

Bürmoos near Salzburg (Salzburg, Austria.)

Head of dental contra-angles

"The invention relates to heads for, dental Elbows which are provided with at least one ring channel for the supply of spray water and with spray nozzles from which fine jets of water or other media are directed onto the rotating tool.

According to the invention, the annular channel is to the outside air via an annular gap extending over its entire circumference open, and this annular gap is sealed by a ring made of elastic material.

This ring seal, mainly designed as an O-ring, can be removed and this design therefore allows access to the ring channel and also to the pressurized water supply line get what for cleaning the entire water supply "; including the spray nozzles. ι

Basic ideas on this are already explained in the applicant's Austrian patent no. 239 · 958. As stated richly in this patent, the present invention also applies to the purpose of finding a simple solution to the task of enabling the dentist to clean all Waonerl canal. The state of the art is ^: the subject of Austrian patent no. 239 · 9ί? 8 ■ ■ as well as the previously known types of spray management listed therein. :,

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19Ö7658

The iin Austrian Patent Hr, 239,958 specified Stirnverschraubung _y has the disadvantage that can easily be coated, the fine Verschraubungsgewinde upon actuation by the untrained ZahnarA or damaged, and then a further repairs may be necessary. Another disadvantage of the screwed-on nozzle plate according to Austrian Patent No. 239.958 can also be seen in the fact that the position of the outlet nozzles is changed when the nozzle plate is replaced _: because it is practically not possible to manufacture the head and nozzle plates independently of one another in such a way that the nozzle plate at Stop on the front face of the head, guaranteeing the same position of the spray nozzles in the circumferential direction. ;

The sealing ring according to the invention which can be pressed into the annular groove of the head by hand, on the other hand, only closes - '. the ring channel, but does not change anything in the assembly state of the Head and its frontal end. In the dental The complete head housing is therefore used in practice left untouched when the ring channel is opened for cleaning purposes and there is no risk of a " Deformation as can occur with screwed-in components. The sealing ring according to the invention is a simple and cheap component and can easily be replaced if the ring originally inserted after repeated use Exchange damaged and should therefore leak. This sealing ring is easily lifted out of its annular gap with a needle point and vice versa easily pushed into the installation position by hand. . - -

The general consideration of the training according to the invention also includes the problem that an Contra-angle heads have very little axial space for the Accommodation of the frontal coaxial spray feed is available because the construction height of the contra-angle head is through the length of the head drive is lyor-determined and over

9845/0040

«Beyond this dimension, if possible, no increase in the overall length should take place in the axial direction. The solution according to the invention takes these circumstances into account by having a very low The height of the nozzle ring is allowed because of the removable locking ring (Sealing ring) lies in the same plane with the nozzle plate and therefore directly on the ring channel in in the axial direction.

The idea of the invention is of course within the framework of the principle can be used very variably, as can be seen from the following description of some examples. To do this must It should also be mentioned that for tool cooling on high-speed instruments it is not necessarily water alone must be used, but often also atomized Spray mist is supplied or generated at the outlet by adding air to the water jet. For the latter variant it is therefore necessary to arrange two ring channels for air and water on the face of the contra-angle head and to close either one or both channels in accordance with the invention. The accessibility to an additional air ring duct is only to be considered as a possible case, because air ducts are much less than water ducts tend to constipation and therefore their accessibility is not so very important. .

The figures in the drawing represent exemplary embodiments of the invention. It shows Fig. 1 in partial section an angled head with built-in air turbine for ultra-high Speeds of up to 4,000,000 t / min. Fig. 3 shows an embodiment of the Nozzle ring in two parts, Fig. 4- a further training of the nozzle ring, Fi (T. 5 a, third design of the nozzle ring, Fig. 6 shows a front closure for the angle back head.

In the head housing 1 (Fig. 1) the turbine runner 2 with the paddle wheel 3 is arranged in the usual way, besieged on both sides of the runner in compressed air bearings 4-. Ans head sheep t "wir ⁵ supplied through a channel 6, the drive air for the 5ui'-bine-nlaufrad and-from this channel _ Abi - wei ^ uri: -. Cii 7 and> l foresee to the air bearings with

90984S / G04Ö

To supply compressed air. The drive air is fed back through an additional duct inside the head shaft that is not entered. The head housing is on the back ^{^:} page completed by a Vorschiußkanpe 9th The tool 10 is held in the runner ■ of the turbine using conventional clamping methods. The front face of the head on the side of the tool is closed by a nozzle ring 11, which is inseparable and. A sealing is inserted into the head towards the turbine. This nozzle ring forms, through a recess, a locking channel 12 which is connected with a connecting channel 13 to the water supply 14 of the head shaft. The nozzle ring 11 is smaller than the diameter at the mouth of the head. Drill in the head of the head, as a result of which there is a ring that is intended to accommodate the sealing ring 15. This front part of the nozzle ring also contains the spray nozzles 16 and 17, at which the water jets hit the tool from different angles. The sealing ring is axially secured in the Rinfrs-nalt by the fact that the nozzle ring is provided with a wedge groove 18, in the recess of which the ring 15 engages. This wedge groove not only has the purpose of axially fixing the sealing ring, but the flank of this wedge groove running towards the tool side forms a conical ring groove with the G-ehäusebohrunr, i in the -KeilfassQ.n the. Sealing ring is clamped self-sealingly under the influence of the water pressure. Nevertheless, the sealing ring is dimensioned so that its cross-section in the annular gap is already tightly clamped in the installation position and the wedge-shaped. : kung only as an additional. Security for the Mchtfijmktlonv is vieffective. The nozzle ring 11 finally forms with. its inner face, the longitudinal stop for the built-in turbine runner. : "■ -". "..

. 'As already mentioned, the. Preferably used as a. O-Rinpaus G-uräni ordered no, i-t to be installed by -Tintierdruek and v; is lifted out of its built-in position with a needle tip. "Raan riii: der Ttaa ^ W den

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Ring cross-section in the axial direction. and then lifts the There"; from his position. As experiments have shown ! tons of rings open a dozen times. be changed this way, without losing their sealing effect. The change happens very quickly and easily, by the way.

When the sealing ring is removed, the 'ring channel 12 is after the front side open and it can then both this ring canal, as well as the breast holes 16 and 17 as well as the approvals 13 and 14 in different ways and way to be cleaned. '- ".-. a -

The J ¹ Ir. Figure 2 shows a simple variant of Pig. The only difference is that when the sealing ring 15 is removed, the inner conical surface 19 of the nozzle ring 20 can be seen ¹ , whereby the inner mouth of the nozzle bore 17 is visible Conical surface leads inwards, ■ have

and RlngSOalt one and the same Inner Limitation of the HIn ^ 1 ^ς left In. a ^a level 15b of the inner one. . . .

j? i :, 3 zelft pin ^ formation of the .üsenringes In zx ^ ei parts, whose inner as a screwed ring 21 and its outer-γν, - the end face forming part 22, as a flange with Hai ai ": rat ζ 23 1st and detachably connected via a sealing ring 24 · Eilt i'-n: -elngeschra ^- j.bten ring 21 1st. The Löx-3 I ¹ ViI 22 of the DüsGiirine; it forms the bodice around the Eopfböhrung ο1; ι? "Λ the annular gap to the Take up the. Sealing ring 1_5, which not wv in ^ lne Y.exlzvot d- ^a s DÜFenrlnges, but also engages in another IJut 25 of the EoOfbohrung and ^ o'firit "axially right. ^J .t _: ^v ol3 ^ t -will * Ήί nrat oiar * den Elemmrins 15 like'be- ν; .. η -_ ..: ■ asinar Einä'xstellunsv ^s0 can also..the nozzle ring h-erfna-'ezo ^ e-ii. Sin Inne / jr; ^ wlnd-3 26 of the nozzle ring ica'rm to be used for this dismantling., - * ■.. _:

}?! - :. 4 aoigt an AuGfuliiing of a nozzle ring with 'dlii- ^ approx-il 12; m ". JlchoT-in ^. " Ij ..αουΐο Waöserdüse. 16/17 for,. . "■ exin.1 ^ abi ■ - ■ dead»! Another ring alive—

■ '■ .. ■. "■■■■ ·' 1007618

Channel 27 with outlet nozzles 28 for compressed air · * aps a Zuleitungskänal 29 tkanäl from Druckluf is brought 8; .'- ■; .- "The air supply line to the nozzle 28 isiTnich -freizulegen ^ ,. .- ^ ^1; only the annular channel for Water can be ^{accessible after removing the 1st} sealing ring The air jet emerging from nozzle 28 takes the water jet emerging from the nozzle 15 with it and atomizes it into a spray oil ^: The. - ..; Nozzle holes for air and water "must go with these. Purpose / be arranged in pairs in the radial direction. ■ .- "■ ?. ■■: ■ - .;

Fig. 5 shows a nozzle ring consisting of two parts 2Ia ^ -'2Sa, the two centrally .arranged Rin- ~ lcanäTe -, - '. for water itfid air (12 and JO) forms and has both channels open to the surface of the head through opening channels * This channel is shown in Fig. 1 through a; Sealed: - ^: .- "rinp; 15 ': tind a" second sealing ring 31 releasably - closed. The inner channel 12 is connected to the water supply 14 via sine boh "rim ^ 15, from" the "Rin ^ -c-anal- JG ^: leads a circumferential direction:" to the channel 13 ^^ rp ^ tzteT channel: · 32! to: compressed air line, vjie in Fl-sr. 4 o.ar ^ estel; lt. - Also in this example are the air nozzles - 28 eeseti the ^T -ferkzeu £ ·: '"erig'htet and take the water jets on the way there ^, the; nozzles'16/17" below it Zer-stau ^ nrtf ^ iir '"on; - *

Fir. 6 shows a forehead closure fuv '& vn V / ink ^ l- ^ tück- kor> f, in which case he unscrews nozzle ri-dig; '53 - 2 - "&de'm - .. head housing a radial ring gap. 3 ^ forms, in'den cüst water channel 13 and the nozzle bores 16/17 iP-ünderti- ^j ] 3le ring gap 34 is through, a sealing ring \ , 35 -ab ^ eschlo.siseri ^. The fcreisf-shaped stretched 'over the annular gap ^ eißirt- v / ird and through its expansion saving the annular gap Sidhtend "■■ - concluding thereby kaiin the Sjuerschniirt :. des Ringrs3ali7ss; "'■ taking into account the usual water pressure of approx. 1 ätu- be dimensioned so that the Water pressure guaranteed * - The ^ Diehtrin ^ 35-is held by a protruding edge of the nozzle tmd an end face 37- -es KO; r> f housing: axially in-Stellä "Here is the rupture of the sand 3"

BATH ORIGINAL

dimensioned so that the ring exercises without much overstretching. ¹ this edge can be pushed. A recess 38 in the edge makes it easier to remove the sealing ring. A similar recess could also be arranged behind the sealing ring in the end face of the jar.

In this application of the experience of thanksgiving. will So the locking ring is not placed under Hleraiin.'irkunR,., instead, the seal merely effects its concentric tension under pressure on the radially open annular gap.

In the invention, of course AMany other variants can to Aur: e -Consult taken, whereby it would be possible, not only di ^ simple basic form a ⁿ P you Trinkes of circular cross section, but other profiles for such Dichtriive u vorwennen?. It also does not leave the framework of the S ^- "fin van · · , v / enn r;, to the sealing"

(possibly including inetal] isclier Rin -'- parts) so educates that he meets within himself i \ e Du ^ -eixboh.runc: en and thus at! - 'erausriähr-e -3es Dd-int ^ in ^ e? ier R "nrkar.al is completely exposed.

Essential that the known Ringkänal of festEiontle-'ten parts, the head f is ebildet .'und Dieso · ¹ R ^ "r is at all possible to b ^ n ^ Lich iavpndungen,:>: anal, either axially or radially ο ier in "both Ri'uitunr-n, closed by an easily exchangeable u ^ ichtungr ir) rr U ¹ Iu is also sealed; litIiSES3 \"

90 98A5 / 0040

Claims (8)

1907S58 Claims: ' 1V / head of dental) contra-angles with at least one ring channel for the supply of spray water and is provided with spray nozzles, characterized in that that the ring channel (12, JO, 34) over one over its whole Extensive annular gap (15a) open to the outside air and this annular gap is formed by a ring (15i 24 »31, 35); ...: _. elastic material is sealed. 2. Head according to claim 1, characterized in that the annular channel (12, 30, 34) between the inner wall of the head housing (1) and an annular insert (nozzle ring 11, - _: 20, 21, 33) is formed in which possibly also further ring channels are formed. . - 3. Head according to claim 2, characterized in that the insert made of two interlocking rings (21, 22, Fig. 3 and Fig. 5) is formed between: oneself a i Form ring channel (12). ^; 4. Head according to one of the preceding claims, '· Characterized in that at least one of the walls of the \ annular gap "has a continuous groove (18) into which the! Sealing ring (15) engages. ·. ---- '! 5 * head according to claim 1, characterized in that kl is the area of the insert that delimits the annular gap. . (20 ", Fig. 2) I is tapered from behind (19, and the opposite: j wall of the head has a step (15b) that accommodates the sealing ring (15) .: '\ "^; ... - - ; -: ■:. ■■ I G. head according to ".Anspruch-1", characterized in that f. -the Ringspält (34) in the radial Richtu-ng open Istv and the "r sealing ring is \ placed (35) under Eirenspannung to the gap opening (Fig. 6). ;. . ■ ■■ .. : _ ■,; V. ' ^x ■ "■ ..- .." 7. Head according to one of the preceding claims, ■ ^; characterized in that the insert is screwed into the head. . . . "■ ''-; ■■. '■■ - ■. ■ - ■■ "'." ■ - 6 - "" ■ ■ "■. ■"', ^: ■. S09845 / 0040 BADOMGfNAL 8. Head according to one of the preceding claims, characterized in that the spray nozzles (16, 17) in the Use are worked out. 9 head according to claim J, characterized that zx ^ ischen the two insert rings (321., 22) another, Ring seal sealing the ring channel against the inside of the head (24) is provided. .-, "-...-.- 90984S Empty