SE201218C1

SE201218C1 -

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Publication number: SE201218C1
Authority: SE
Publication date: 1965-01-01

Description

Uppfinnare: J V Borden Prioritet begdrd ;ran den 18 juni 1957 (USA) Foreliggande uppfinning avser en anordning vid dentalhandstycken eller liknande, som drivas medelst en tryckgasturbin, lagrad i rullningslager. Inventor: J V Borden Priority Requested June 18, 1957 (USA) The present invention relates to a device for dental handpieces or the like, which is driven by a pressurized gas turbine, stored in rolling bearings.

Utvecklingen vad betraffar dentalhandstycken gar fOr narvarande i riktning mot utnyttjandet av mycket hdga varvtal. Till forbattrandet av skareffekten är det vanligt att anvanda s. k. karbidborrar liksom aven diamantborrar. Vad betraffar karbidborrar erbanes icke maximal skareffekt fdrrfin borrens varvtal uppgar till c:a 400000 r/m medan ordinara dentalverktyg arbeta med varvtal om mellan 5000 och 10000 r/m. The development with regard to dental handpieces is currently moving in the direction of the utilization of very high speeds. To improve the cutting effect, it is common to use so-called carbide drills as well as diamond drills. As far as carbide drills are concerned, the maximum cutting power is not provided before the drill's speed amounts to about 400,000 r / m, while ordinary dental tools work at speeds of between 5,000 and 10,000 r / m.

For att man skall komma det 8nskade varytalet om c:a 400000 r/m sit nara som mojligt kraves en synnerligen effektiv smorjning och for detta andamal utmarkes anordningen enligt uppfinningen i huvudsak darav, att strOmmen av filterrenad tryekgas, som driver turbinen, alstras och tillates upptaga en smorjmedelsdimma innan den inkommer i handstycket och att atminstone en del av tryckgasen strommar igenom lagren i handstycket. In order to obtain the desired number of goods of about 400,000 r / m as close as possible, a particularly efficient lubrication is required and for this purpose the device according to the invention is distinguished mainly by the fact that the flow of filter-purified pressurized gas, which drives the turbine, is generated and allowed take up a lubricant mist before it enters the handpiece and that at least a part of the pressure gas flows through the bearings in the handpiece.

Uppfinningen kommer att forklaras narmare nedan med hanvisning till de bifogade ritningama. The invention will be explained in more detail below with reference to the accompanying drawings.

Fig. 1 visar i perspektiv ett hus innehallande en manoveranordning enligt foreliggande uppfinning, varvid samtidigt med punktstreckade linjer visas ett verktyg i vilolage i huset; Fig. 2 visar manoveranordningen enligt fig. 1 i vertikalsnitt; Fig. 3 visar i vertikalsnitt och i storre skala an den for fig. 1 tillampade en installbar manoverventil for det gasformiga fluidet, vilken ventil utgor en del av anordningen enligt fig. 1 och 2; Fig. 4 visar ett kopplingsschema Over de i manoveranordningen ingaende elektriska stromkretsarna ; Fig. 5 är en planvy av smdrjanordningen i manoveranordningen enligt uppfinningen; • Fig. 6 visar smorjanordningen i snitt utmed linjen 6-6 i fig. 5; Fig. 7 visar smorjanordningen i snitt ut:- med linjen 7-7 i fig. 5, varvid vissa av de delar askadliggoras, som icke visas i fig. 6; Fig. 8 visar i vertikalsnitt en manoverven7 til f8r vattentillforseln; Fig. 9 är ett fig. 2 liknande vertikalsnitt, varvid emellertid visas en manoveranordning av ett annat och nagot enklare utforande an mandveranordningen enligt fig. 2; Fig. 10 visar i snitt en del av en annan utforingsform av regleringsmekanismen i smOrjanordningen; Fig. 11 visar en anordning f8r dentalverktygets upphangning pa manoveranordningen. Fig. 1 shows in perspective a housing containing an operating device according to the present invention, wherein at the same time with dotted lines a tool is shown in rest position in the housing; Fig. 2 shows the operating device according to Fig. 1 in vertical section; Fig. 3 shows in vertical section and on a larger scale than the one applicable for Fig. 1 an installable control valve for the gaseous fluid, which valve forms part of the device according to Figs. 1 and 2; Fig. 4 shows a circuit diagram of the electrical circuits included in the control device; Fig. 5 is a plan view of the lubrication device in the operating device according to the invention; Fig. 6 shows the lubrication device in section along the line 6-6 in Fig. 5; Fig. 7 shows the lubrication device in section: with line 7-7 in Fig. 5, some of the parts not shown in Fig. 6 being damaged; Fig. 8 shows in vertical section a control vein 7 for the water supply; Fig. 9 is a vertical section similar to Fig. 2, but showing a maneuvering device of a different and somewhat simpler design than the maneuvering device according to Fig. 2; Fig. 10 is a sectional view of a portion of another embodiment of the control mechanism in the lubricating device; Fig. 11 shows a device for suspending the dental tool on the operating device.

Pa ritningarna visas ett flertal utfOringsexempel av foreliggande uppfinning, omf attande en manoveranordning for dentalverk7 tyg, men det inses, att de visade utforingsformerna icke skola betraktas sasom begransande utan i forsta hand sasom illustrativa für uppfinningen. The drawings show a number of embodiments of the present invention, comprising a maneuvering device for dental tools, but it will be appreciated that the embodiments shown are not to be construed as limiting but primarily as illustrative of the invention.

Sasom visas i fig. 1 och 2 aro de olika komponenterna i manoveranordningen enligt uppfinningen anbragta i ett lampligt hus 10, vilket utforande speciellt kommer till anvandning for det fall att manOveranordningen skall anbringas pa ett redan befintligt apparatstativ intill en s. k. tandlakarstol. Det inses emellertid, att da en manoveranordning av detta slag skall anbringas i ett nytt apparatstativ sit kan i detta anordnas en lamplig avdelning i vilken de olika komponenterna i manoveranordningen enligt f8religgande upp- 2 finning anbringas. Om O. onskas kan huset 10 vara sh utformat, att det inkluderar ett avtagbart holje 12 med en tdekplat 14, varvid holjet och tackplaten lampligen dro utforda i ett sammanhangande stycke och fasta vid huset 10 medelst lampliga fastorgan, sAsom exempelvis skruvar 16. For att underlatta holjets och tackplatens anbringande ph och borttagande fran huset 10 är iackplaten for-sedd •med ett antal hal, genom vilka olika delar av manoveranordningen, sasom manovervred och liknande, utskjuta. As shown in Figs. 1 and 2, the various components of the operating device according to the invention are arranged in a lamp housing 10, which design is especially used in the case that the operating device is to be mounted on an already existing apparatus stand next to a so-called dental chair. It is understood, however, that when an operating device of this kind is to be fitted in a new apparatus rack, a suitable compartment can be arranged in it in which the various components of the operating device according to the present invention are fitted. If desired, the housing 10 may be shaped so as to include a removable housing 12 with a cover plate 14, the housing and the roof plate being suitably deflected in a continuous piece and fixed to the housing 10 by means of suitable fixing means, such as screws 16. In order to To facilitate the application of the housing and the roof plate and the removal from the housing 10, the roof plate is provided with a number of slides, through which different parts of the maneuvering device, such as maneuvering knobs and the like, project.

De olika komponenterna i manoveranordningen enligt uppfinningen visas tydligast i fig. 2. Det framgAr att inloppsledningen 18 for det gasformiga fluidet leder frail en lamp-hg tillforselkalla, sdsom en tryckluftstank, som vanligen utnyttjas for tillforsel av tryckluft till olika instrument mom en tandlakarpraktik. Inloppsledningen 18 är forbunden med en nippel 20, som i sin tur är forbunden med inloppsanden till en mantiverventil 22. Den speciella utfdringsforin av manOvervenfilen, som visas i fig. 2. visas i storre skala och i snitt i fig. 3 och kommer att beskrivas narmare nedan. Gasformigt fluidum ledes frail manoverventilen till inloppsanden av ett 'filter 24, som kan vara av vilket som heist lampligt slag men dock skall uppvisa vissa viktiga egenskaper sasom kommer att forkla-ras narmare nedan. The various components of the control device according to the invention are most clearly shown in Fig. 2. It can be seen that the inlet line 18 for the gaseous fluid conducts a lamp-high supply cold, such as a compressed air tank, which is usually used to supply compressed air to various dental practice practices. The inlet line 18 is connected to a nipple 20, which in turn is connected to the inlet sand to a mantiver valve 22. The special embodiment of the maneuver file shown in Fig. 2 is shown on a larger scale and in section in Fig. 3 and will be described. closer below. Gaseous fluid is passed from the control valve to the inlet sand of a filter 24, which may be of any suitable type but should still exhibit certain important properties which will be explained in more detail below.

Filtret 24 är lampligen sammankopplat med en. tryckmatare 26, som dr anordnad att .angiva det s. k. mottrycket i manoveranordningen, vilket motsvarar det tryck, som Over-fares frAn manoveranordningens utloppsledning 28 till dentalverktyget. Filtrets 24 utloppsande är genom en nippel 30 forbunden med en magnetventil 32, vars utloppsport medelst en annan nippel är forhunden med inloppet till en smorjanordning 34, vilken visas i snitt och i storre skala i fig. 6 och 7. For tillforsel av vatten, lampligen vid ett forutbestamt tryck, till dentalverktyget är maniiveranordningen Oven forsedd med en vatteninloppsledning 36, som Or ansluten till en lamplig vattentillforselkalla. Ledningen 36 Or ansluten till en magnetventils 38 inlopp. En farbindelseledning 40 Or anordnad mellan mentilens 38 utlopp och en regleringsventil 42, som är forsedd med ett installningsvred 44, medelst vilket ventilen instdlles for till- forsel av vatten till lamplig mangd och med lampligt tryck till utloppsledningen 46, till vilken en bojlig vattenslang Or ansluten i och for framledning av vatten till verktyget 48, vilket visas med punktstreckade linjen i fig. 1. The filter 24 is suitably connected to one. pressure feeder 26, which is arranged to indicate the so-called back pressure in the operating device, which corresponds to the pressure which is transferred from the outlet line 28 of the operating device to the dental tool. The outlet of the filter 24 is connected by a nipple 30 to a solenoid valve 32, the outlet port of which by means of another nipple is obstructed by the inlet to a lubrication device 34, which is shown in section and on a larger scale in Figs. 6 and 7. For supply of water, suitably at a predetermined pressure, to the dental tool, the operating device Above is provided with a water inlet line 36, which Or is connected to a suitable water supply source. Line 36 Or connected to a solenoid valve 38 inlet. A connecting line 40 Or arranged between the outlet of the mentile 38 and a control valve 42, which is provided with an installation knob 44, by means of which the valve is arranged for supplying water to a suitable quantity and with suitable pressure to the outlet line 46, to which a flexible water hose Or is connected. in and for the supply of water to the tool 48, which is shown by the dotted line in Fig. 1.

Da verktyget icke anvandes skall det givetvis forvaras sO, att det icke skadas. Foljaktligen kan huset 10 och speciellt tackplaten 14 forses med ett hOl, vilket omslutes av exempelvis en gummiring 50 av tillracklig diameter for att man Mt skall kunna infora huvudet 52 p0 verktyget, som skall uppbaras fritt inuti huset 10, liksom Oven for att man latt skall kunna uttaga verktyget, da det shall anvandas. Since the tool is not used, it must of course be stored so that it is not damaged. Consequently, the housing 10 and especially the roofing plate 14 can be provided with a hole, which is enclosed by, for example, a rubber ring 50 of sufficient diameter to be able to insert the head 52 onto the tool, which is to be carried freely inside the housing 10, as well as to be easily be able to remove the tool, as it shall be used.

Utan begransning hartill Or verktyget 48, vars huvud Or anordnad en gasturbin, lampligen anordnat att drivas medelst ett gasformigt fluidum, sasom tuft, som tillfOres under ett tdmligen lagt tryck. Flertalet tandlakares praktiker forses med luft vid tryck overstigande 1,5 kg/cm2. I den i fig. 1-8 visade ut- foringsformen av anordningen enligt uppfin- ningen Or regleringsventilen darfor av det slag, som visas i detalj i fig. 3. Ventilen är ut- formad med en kropp 51 med en inloppsport 56, vilken Or forbunden med en axiell hang-het 58, i vilken ett ventilskaft 60 Or axiellt forskjutbart. PA den ena anden av ventilskaf- tet är fast ett ventilorgan 62, som är anordnat att samverka med ett hylsliknande yen- tilsate 64, vilket Or fast anordnat i forhallande till kroppen 54. Inuti ventilsatet 64 är anordnad en mycket klen fjader 66, vilken samver- kar med en fast krage 68 p0 ventilskaftet 60, sa att ventilorganet 62 normalt halles i sitt stangda lage, varvid det anligger mot ventilsatets 64 undre ande. Without limitation thereto, the tool 48, the head of which is arranged a gas turbine, is suitably arranged to be operated by means of a gaseous fluid, such as tuft, which is supplied under a substantially applied pressure. Most dental practitioners' practices are supplied with air at pressures in excess of 1.5 kg / cm2. In the embodiment of the device according to the invention Or shown in Figs. 1-8, the control valve therefor of the type shown in detail in Fig. 3. The valve is formed with a body 51 with an inlet port 56, which Or connected to an axial suspension 58, in which a valve stem 60 is axially displaceable. On one end of the valve stem is fixed a valve member 62, which is arranged to cooperate with a sleeve-like yen insert 64, which Or is fixedly arranged in relation to the body 54. Inside the valve seat 64 is arranged a very small spring 66, which coexists vessel with a fixed collar 68 on the valve stem 60, so that the valve member 62 is normally held in its closed bearing, abutting the lower end of the valve set 64.

Ventilskaftets 60 ovre ande Or forbunden med ett organ 70, som Or fast vid mitten av ett bojligt membran 72, vars kant fasthAlles mot satet 74 i kroppen 54 medelst ett ihaligt, gangat lock 76, som Or inskruvat i kroppen 54 till anliggning mot membranet 72. The upper end of the valve stem 60 is connected to a member 70 which is fixed to the center of a flexible diaphragm 72, the edge of which is secured to the satet 74 in the body 54 by a hollow, stepped lid 76 which is screwed into the body 54 for abutment against the diaphragm 72. .

Dot gangade locket 76 omsluter en tryekfjader 78, som strdcker sig mellan ett stod- organ 80 och en skiva 82, vilken stoder mot membranets 72 oversida och Or fast vid organet 70. Genom det ihaliga, gangade lockets 76 byre ande Or inskruvad en installningsskruv -84, vars inre dude anligger mot stOdorganet 80, sa att delta forskjutes vid inskruvning av skruven 84, varvid fjadern sammantryckes mot skivan 82, som foljaktligen utovar ett stone tryck mot membranet 72. Manoverventilen 22 Or forsedd med en utloppsport 86, genom vilken gasformigt fluidum under ett onskat, inreglerat tryck Over- fOres till det system, som utgOres av de ovriga komponenterna i huset 10. Om det emellertid antages, att man onskar driva verktyget med ett visst bestamt tryck, sd.som exempelvis 1, kg/cm2, som angives pa mataren 26, sh kommer detta tryck att verka mot membranets 72 insida ungefar sAsom ett mottryck. Fjaderns 78 kraft installes sh, att ventilorganet 62 Mies tippet av fjadern 78 mot inverkan av ett dylikt, mot membranet 72 verkande mottryck. 201 21 aa Om mottrycket av nagon som heist anledning skulle overskrida det onskade arbetstrycket kommer ventilorganet 62 att stangas intill dess att mottrycket pa grund av verktygets anvandning nedgatt sa mycket, att det iinskade trycket i systemet aterstallts, varefter fjadem 78 kommer att oppna ventilorganet 62, oberoende av det ledningstryck, som verkar mot manoverventilen. Trots omstandigheten att ledningstrycket vanligen kommer att overstiga trycket i systemet sakerstaller ventilorganets 62 ringa diameter jamfort med membranets 72 avsevart storre diameter att manOverventilen fungerar pa det omtalade sattet. The dead end cap 76 encloses a compression spring 78 extending between a support member 80 and a disc 82 which rests against the upper side of the diaphragm 72 and is secured to the member 70. Through the hollow member of the threaded end 76 screwed in an installation screw - 84, the inner dude of which abuts the support member 80, so that the delta is displaced when the screw 84 is screwed in, the spring being compressed against the disc 82, which consequently exerts a stone pressure against the diaphragm 72. The control valve 22 is provided with an outlet port 86, through which gaseous fluid under a desired, regulated pressure is transferred to the system which consists of the other components in the housing 10. If, however, it is assumed that one wishes to operate the tool with a certain determined pressure, such as, for example, 1 kg / cm 2, which indicated on the feeder 26, sh this pressure will act against the inside of the diaphragm 72 approximately as a back pressure. The force of the spring 78 is installed so that the valve member 62 measures the tip of the spring 78 against the action of such a back pressure acting on the diaphragm 72. If the back pressure of any reason should exceed the desired working pressure, the valve member 62 will be closed until the back pressure due to the use of the tool has decreased so much that the reduced pressure in the system is restored, after which spring 78 will open the valve member 62. regardless of the line pressure acting on the control valve. Despite the fact that the line pressure will usually exceed the pressure in the system, the small diameter of the valve member 62, compared with the considerably larger diameter of the diaphragm 72, ensures that the control valve operates in the manner described.

Filtret 24 är av det slag, som erhaller gasformigt fluidum fran manOverventilen 22 vid ett forutbestamt, instant tryck och till Onskad mangd, varvid det gasformiga fluidet instrOmmar i filterhuset 88 och strommar genom ett cylindriskt filtermedel 90, som kan vara av vilket som heist lampligt slag. Det inre av filtermedlet 90 är forbundet med tryckmataren 26 avensom med utloppsnippeln 30 sá att filtrerat, gasformigt fluidum le-des till magnetventilen 32, varvid trycket hos det filtrerade fluidet aven verkar mot mataren 26, som avlasbart angiver tryckets storlek. Magnetventilen 32 är av ordinart slag och styres medelst en stromstallare i en av manoveranordningens elektriska stromkretsar, som komma att beskrivas narmare nedan. Magnetventilens 32 utlopp är forbundet med inloppet till smorjanordningen 34, som visas i detalj i fig. 5-7. Smorjanordningen är lampligen av det slag, som insager flytande smorjmedel, varvid ett fiirrad av detta kvarhalles i behallaren 92. Det instrOmmande gasformiga fluidet, vilket har det pa mataren 26 angivna trycket, verkar mot ytan av smorjmedlet i behallaren 92. varvid det utovar ett tillrackligt tryck for att tvinga en del av smorjmedlet uppat genom smOrjanordningens 34 stigror 94. The filter 24 is of the type which receives gaseous fluid from the control valve 22 at a predetermined, instantaneous pressure and to the desired amount, the gaseous fluid flowing into the filter housing 88 and flowing through a cylindrical filter means 90, which may be of any suitable type. . The interior of the filter means 90 is connected to the pressure feeder 26 as well as to the outlet nipple 30 so that filtered, gaseous fluid is led to the solenoid valve 32, the pressure of the filtered fluid also acting against the feeder 26, which readably indicates the magnitude of the pressure. The solenoid valve 32 is of the ordinary type and is controlled by means of a switch in one of the electric circuits of the operating device, which will be described in more detail below. The outlet of the solenoid valve 32 is connected to the inlet of the lubrication device 34, which is shown in detail in Figs. 5-7. The lubricating device is suitably of the type which engages liquid lubricant, a line of which is retained in the container 92. The inflowing gaseous fluid, which has the pressure indicated on the feeder 26, acts against the surface of the lubricant in the container 92. thereby exerting a sufficient pressure to force a portion of the lubricant up through the risers 94 of the lubricator 34.

Fig. 6 och 7 visa smorjanordningen 34 i snitt, sa att anordningens detaljer skola visas tydligare an i fig. 2. Fig. 6 och 7 aro emellertid omvanda i forhallande till fig. 2, sa att inloppsporten 96 i fig. 6 visas vid figurens vanstra sida medan den i fig. 2 visas vid den 'Vigra sidan. I motsvarighet härtill befinner sig utloppsporten 98 till hoger i fig. 6 medan den visas vid smorjanordningens vanstra sida i fig. 2. Med hanvisning till fig. 6 kommer gasformigt fluidum, sasom exempelvis luft, att vid oppen magnetventil 32 instromma i smorjanordningen 34 genom porten 96 och strommar sedan genom en liten borrning 100 in i en vertikal kammare 102 samt nedat genom denna forbi sugrorets 104 undre ande, varefter fluidet strommar in i den undre kammaren 106, vilken är forsedd med ett an-tat radiella portar 108, som oppna sig in mot behallaren 92. Eftersom det gasformiga fluidet har ett tryck inom ett omrade av exempelvis mellan 1,5 och 2 kg/cm2, beroende av ventilens 22 installning, kommer det gasformiga fluidet att fran behallaren 92 strOmma uppat genom halet 110, som är forbundet mat utloppsporten 98. Figs. 6 and 7 show the lubrication device 34 in section, so that the details of the device should be shown more clearly than in Fig. 2. Figs. 6 and 7 are, however, converted in relation to Fig. 2, so that the inlet port 96 in Fig. 6 is shown in Figs. left side while in Fig. 2 it is shown at the 'Vigra side. Correspondingly, the outlet port 98 is on the right in Fig. 6 while shown at the left side of the lubricating device in Fig. 2. Referring to Fig. 6, gaseous fluid, such as air, will flow into the lubricating device 34 through the port when the solenoid valve 32 is open. 96 and then flows through a small bore 100 into a vertical chamber 102 and down through it past the lower end of the suction tube 104, after which the fluid flows into the lower chamber 106, which is provided with another radial port 108, which opens. towards the container 92. Since the gaseous fluid has a pressure within a range of, for example, between 1.5 and 2 kg / cm 2, depending on the installation of the valve 22, the gaseous fluid will flow from the container 92 upwards through the tail 110, which is connected food outlet port 98.

Pa grund av att behallaren 92 innehaller det flytande smorjmedlet till en viss bestamd vilken angives medelst linjen 112, kommer det gasformiga tryckfluidet att tvinga en del av det flytande smOrjmedlet uppat genom stigrOret 94 och genom den invandiga passagen 114, sa att det utstrommar fran mynningen av en hals 116 i en lampligen transparent kapa 118. Da det gasformiga fluidet strommar nedat genom den vertikala kammaren 102 forbi sugrorets 104 utovas en sugningsverkan mot de droppar av smorjmedel, som utkomma frail halsen 116 och riktas ned mot fordjupningen 120. Sugrorets 104 byre dude är forbunden med fordjupningens 120 botten och den sugning, som alstras vid det gasformiga fluidets passage forbi sugrorets 104 ande, medfor en positiv och undan for undan forsiggaende avsugning av smOrjmedel i droppform frau. sugrorets 104 undre linde. Smorjmedlet, exempelvis olja, droppar mot kammarens 106 undre ande 122, fig. 7, varvid dropparna stota mot bottnen sâ att atminstone en del av dem finfordelas kraftigt, varefter det gasformiga fluidet, som strOmmar ut genom de radiella portarna 108 uppblandas med det finfordelade smorjmedlet och tager med sig detta till behallarens 92 8vre del, varifran det med smorjmedel blandade, gasformiga fluidet utstrOmmar genom utloppsporten 98 till utloppsledningen 28 i och for att matas till det till detta anslutna verktyget. Due to the fact that the container 92 contains the liquid lubricant to a certain destination which is indicated by the line 112, the gaseous pressure fluid will force a part of the liquid lubricant up through the riser 94 and through the internal passage 114, so that it flows out from the mouth of a neck 116 in a suitably transparent cape 118. As the gaseous fluid flows downward through the vertical chamber 102 past the suction tube 104, a suction action is exerted against the droplets of lubricant which emerge from the neck 116 and are directed down towards the recess 120. The suction tube of the suction tube 104 is connected to the bottom of the recess 120 and the suction generated by the passage of the gaseous fluid past the end of the suction tube 104, results in a positive and gradually preceding suction of lubricant in droplet form frau. sugrorets 104 undre linde. The lubricant, for example oil, drips against the lower end 122 of the chamber 106, Fig. 7, the droplets projecting towards the bottom so that at least a part of them is finely atomized, after which the gaseous fluid flowing out through the radial ports 108 is mixed with the atomized lubricant and takes it to the upper part of the container 92, from which the gaseous fluid-mixed fluid flows out through the outlet port 98 to the outlet conduit 28 in order to be fed to the tool connected thereto.

I overensstammelse med smorjanordningens 34 verkningssatt komma endast vissa av de smorjmedelsdroppar, som traffa den undre kammarens 106 botten 122, att finfordelas, medan andra droppar forbliva i droppform och utstromma genom portarna 108 i droppform, varefter de droppa ned i smorjmedelsforradet i behallaren 92. Under vissa arbetsbetingelser for smOrjanordningen 34 kan vidare nagot av ett overskott av smOrjmedel samla sig i fardjupningen 120 och framgar av fig. 7 kommer atminstone en del av detta overskott att utstromma genom passagen 124 till utloppsporten 126, fran vilken smorjmedel pa grund av sin egen tyngd droppar ned i smorjmedelsforradet i behallaren 92, beroende av installningen av en nal- 4 ventil 128, vars byre ande är Atkomlig f6r paverkan medelst ett lampligt verktyg. In accordance with the operation of the lubricating device 34, only some of the lubricant droplets hitting the bottom 122 of the lower chamber 106 are atomized, while other droplets remain in droplet form and flow out through the ports 108 in droplet form, after which they drip into the lubricant supply in the container 92. further, certain operating conditions of the lubricator 34 may cause some excess lubricant to accumulate in the recess 120 and as shown in Fig. 7, at least a portion of this excess will flow out through the passage 124 to the outlet port 126, from which lubricant due to its own weight drips. down into the lubricant supply in the container 92, depending on the installation of a needle valve 128, the opening of which is accessible for impact by means of a suitable tool.

Nalventilens 128 installning reglerar aven storleken av den sugning, som alstras i kapan 118, beroende av att trycket pa det gasformiga fluidet i behallaren 92 kan overforas genom -utloppsporten 126 om oppningen dr tillrackligt stor for att trycket skall kunna overvinna -viskositeten hos det flytande smorjmedlet, som strommar genom porten 126. Den omtalade anordningen forhindrar vane tendens hos smorjmedlet att overfloda fordjupningen 120, vilket skulle resultera i en tendens till att ett overskott av smorjmedelsdroppar avgives frail sugrorets 104 undre ande. Det framgar alltsa, att regleringen medelst nalventilen 128 är onskvard i andamal att uppna, att det gasformiga fluidum, som utstrommar fran utloppsporten 98, är blandat med den Onskade mangden flytande smorjmedel. Med nagon liten ovning kan tandlakaren vi-dare latt bliva fortrogen med den ungefarliga mangden smorjmedel, som lampligen skall avgivas frail halsens 116 mynning, i det att han kan iakttaga kapan 118, speciellt eftersom denna skjuter upp genom tackplaten 14 for husets 10 holje, shsom visas tydligt i fig. 1. The installation of the needle valve 128 also regulates the magnitude of the suction generated in the housing 118, depending on the fact that the pressure of the gaseous fluid in the container 92 can be transmitted through the outlet port 126 if the opening is large enough for the pressure to overcome the viscosity of the liquid lubricant. , which flows through the port 126. The said device prevents the habitual tendency of the lubricant to overflow the recess 120, which would result in a tendency for an excess of lubricant droplets to be dispensed from the lower spirit of the suction tube 104. It can thus be seen that the control by means of the needle valve 128 is sufficient to achieve that the gaseous fluid flowing out of the outlet port 98 is mixed with the desired amount of liquid lubricant. With a little practice, the dentist can further become familiar with the harmless amount of lubricant which is to be emitted from the mouth 116 of the neck, in that he can observe the cap 118, especially since it protrudes through the roof plate 14 for the housing 10 housing, which is clearly shown in Fig. 1.

For reglering av instromningen av gasformigt fluidum fran tillforselledningen till manoveranordningen är det lampligt att ventilen 32 inkopplas i systemet framfor smorjanordningens 34 inloppsport 96. Da behallaren 92 exempelvis skall fyllas med smOrjmedel är det salunda endast nodvandigt att borttaga hOljet 12, skruva bort fastspanningsringen 130 och borttaga behallaren 92 fran anordningen, varefter behallaren latt kan fyllas till onskad niva och sedan Ater insattas i sitt lage. Under det att detta utfores kommer icke nagot gasformigt tryckfluidum att instromma i smorjanordningen 31 pa grund av att ventilen 32 anbragts i det redan omtalade laget. To control the inflow of gaseous fluid from the supply line to the actuator, it is convenient for the valve 32 to be connected to the system in front of the inlet port 96 of the lubricating device 34. Since the container 92 is to be filled with lubricant, for example, it is only necessary to remove the housing 12. the container 92 from the device, after which the container can be easily filled to the desired level and then re-inserted into its layer. While this is being done, no gaseous pressure fluid will flow into the lubricating device 31 due to the valve 32 being placed in the already mentioned layer.

DA manoveranordningen anvandes och verktyget 48 skall drivas paverkas emellertid ventilen 32, vilken Or magnetpaverkad, genom nedtrampning av pedalen 132 for stromstallaren 132, sasom visas i fig. 4. I utforingsexemplet enligt fig. 4 är pedalen 132 i sin ena ande forsedd med tva. bryggor 136 och 138. Dessa aro anordnade att sluta kontakter 140 och 142, vilka sluta och bryta strOmkretsarna for manoverventilens 32 och vattenventilens 38 magneter. When the control device is used and the tool 48 is to be driven, however, the valve 32, which is magnetically actuated, is depressed, by depressing the pedal 132 for the current generator 132, as shown in Fig. 4. In the exemplary embodiment according to Fig. 4, the pedal 132 is provided in one spirit with two. bridges 136 and 138. These are arranged to close contacts 140 and 142, which close and break the circuits of the magnets of the control valve 32 and the water valve 38.

Det framgar att manoveranordningen Or ftirsedd med en dubbeltradig stromtillforselledning 144, som Or inford i huset 10, sasom visas i fig. 1, och ansluten till stromstallarkontakterna 140 och 142, sasom visas i fig. 4. En tretradig ledning 146 Or anordnad mellan huset 10 och stromstallaren 134. Det inses, att den visade stromstallaren 134 endast utett exempel pa en lamplig stromstallare. fig. 4 visas Oven andra erforderliga ledningar mellan magneterna och strOmstallarkontakterna avensom ledningar till en huvudstromstallare 148 for hela manoveranordningen. It can be seen that the operating device Or is provided with a double-threaded power supply line 144, which Or is inserted into the housing 10, as shown in Fig. 1, and connected to the power switch contacts 140 and 142, as shown in Fig. 4. A three-line wire 146 Or arranged between the housing 10 and the current 134. It will be appreciated that the current shown 134 is only an example of a suitable switch. Fig. 4 also shows other required leads between the magnets and the switch contacts as well as leads to a main switch 148 for the entire control device.

DA pedalen 132 nedtrampas kommer bryggelementet 136 att sluta manoverventilens 32 stromkrets Over kontakterna 140, varvid gasformigt fluidum Widths stromma frail regleringsventilen 22, genom filtret 24 och in i smorjanordningen 34, varefter det genom tillforselslangen 28 ledes till verktyget, sO att turbinrotom i dettas huvud 52 sattes igang. Det inses naturligtvis att man i utforingsformen enligt fig. 1-4 kan onska driva verktyget endast for drivning av exempelvis en borr i detta, utan att samtidigt spola vatten mot borren. I detta fall nedtrampas pedalen 132 endast delvis, sO att endast kretsen Over kontakterna 140 slutes. Om man emellertid aven onskar spola vatten mot borren nedtrampas pedalen 132 langre, sO att bryggelementet 138 sluter kontakterna 142, varigenom vattenventilens 38 stromkrets slutes, sO att vatten frau tillforselledningen 36 ledes till vattenslangen 46, genom vilken det strommar till verktygshuvudet 52. Om vattentillforseln till verktyget icke langre erfordras medan verktyget dock fortfarande skall lianas igang behover man endast slappa efter pO pedalen, varvid denna lyftes medelst fjadern 150, sa. att stromstallarkontakterna 142 brytas medan kontakterna 140 forbliva slutna medelst bryggelementet 136. When the pedal 132 is depressed, the bridge member 136 will close the control circuit 32 of the control valve 32, the gaseous fluid Widths flow from the control valve 22, through the filter 24 and into the lubricating device 34, after which it is led through the supply hose 28 to the turbine rotor 52 in its head 52. sattes igang. It will of course be understood that in the embodiment according to Figs. 1-4 it is desirable to operate the tool only for driving, for example, a drill in it, without at the same time flushing water against the drill. In this case, the pedal 132 is only partially depressed, so that only the circuit Over the contacts 140 is closed. However, if it is also desired to flush water against the drill, the pedal 132 is depressed further, so that the bridge element 138 closes the contacts 142, thereby closing the water valve 38 circuit, so that water from the supply line 36 is led to the water hose 46, through which it flows to the tool head 52. the tool is no longer required while the tool is still to be started, you only need to relax after the pedal, this being lifted by means of the spring 150, said. that the switch housing contacts 142 are broken while the contacts 140 remain closed by means of the bridge element 136.

DO pedalen 132 nedtrampats tillrackligt mycket for att kontakterna 142 skola ha slutits, O. att matningen av vatten till verktyget pithorjats, kan den tillforda vattenmangden regleras medelst regleringsventilen 42, av vilken en sasom exempel vald utforingsform visas i detalj i fig. 8. For enkelhetens skull kan ventilen 42 endast besta av en nalventil med ett gangat nalorgan 152, som Or anordnat att samverka med ett sate 154 och installbart medelst vredet 44. For bekvamlighetens skull är vredet 44 anordnat sa, att det skjuter upp genom Wets tackplat 14, sa att det Or latt atkomligt. Pa samma satt skjuter regleringsventilens 22 installningsvred 84 upp genom holjets tackplat 14, sasom visas i fig. 1. When the pedal 132 has been depressed sufficiently for the contacts 142 to have closed, O. that the supply of water to the tool has started, the supply of water can be regulated by means of the control valve 42, of which an exemplary embodiment is shown in detail in Fig. 8. For the sake of convenience, the valve 42 may only consist of a squeegee valve with a stepped squeegee member 152, which Or is arranged to co-operate with a sate 154 and installable by means of the knob 44. For convenience, the knob 44 is arranged so as to project through the Wet plate 14, so that it Or easily accessible. In the same way, the installation knob 84 of the control valve 22 projects up through the cover plate 14, as shown in Fig. 1.

I fig. 10 visas en modifierad detalj i gadanordningen 34. Figuren visar endast anordningen for reglering av utmatningen av flytande smorjmedel genom passagen 124. Med anordningen enligt fig. 10 kan man uppna en automatisk reglering av storleken pa det vakuum eller den sugning, som alstras i kapan 118 genom anvandningen av en utloppsventil av kulkontrolltyp i stallet for den i fig. 7 visade nalventilen 128. Det framgar, att ett antal metallkulor 156, sasom exempelvis kullagerkulor, aro anordnade att samverka med utloppsporten 126, som i detta utforande ar utformad med ett kulsate. Kulorna 156 kvarhallas medelst ett gangat tillslutningsorgan ga pa nagot avstand ovanfor kulorna 156. 158, vars undre ande normalt kommer att lig- I drift av anordningen enligt fig. 10 kommer den sugning, som verkar mot halsen 116 att bliva ju storre dess storre trycket pa det i smorjanordningen 34 inforda gasformiga fluidet dr. Dessutom kommer den mangd smOrjmedel, som utstrommar fran halsen till fordjupningen 120 och fran denna ned i sugroret 104 att bliva ju storre dess kraftigare den mot halsen 116 verkande sugningen Genom att utvalja antingen en eller flera kulor 156 av 8nskad vikt, speciellt i motsvarighet till det flytande smorjmedlets viskositet, kan man emellertid uppna en automatisk reglering av sugningen i kapan 118 och en motsvarande utmatning av smorjmedel fran halsen 116, sa att denna mangd star i direkt proportion till trycket pa det gasformiga fluidet i smorjanordningen 34. Dena uppnas pa grund av den omstandigheten, att det gasformiga tryckfluidet I behallaren 92 kommer att verka mot den understa kulan 156 och lyfta denna fran satet 126 i overensstammelse med storleken av det gasformiga fluidets tryck. Ju storre oppningen är mellan kulan 156 och satet 126 dess mindre blir det vakuum eller minskade tryck, som rader i kapan 118. I motsvarighet hartill kommer smorjmedelsavgivningen fran halsen 116 att bliva i alit vasentligt lika med den smorjmedelsmangd, som avgives fran densamma vid ett lagre tryck i behallaren 92. Anordningen enligt fig. 10 verkar foljaktligen sa., att en i huvudsak konstant sm8rjmedelsavgivning fran halsen 116 for finfordelning och inforande i strommen av gasformigt fluidum till turbinen erhalles, Oven fastan trycket ph det gasformiga fluidet i smorjanordningen 34 kan variera Mom tamligen vida granser. Fig. 10 shows a modified detail in the street device 34. The figure shows only the device for controlling the discharge of liquid lubricant through the passage 124. With the device according to Fig. 10 it is possible to achieve an automatic control of the size of the vacuum or the suction which is generated. in the housing 118 by using a ball control type outlet valve in the place of the needle valve 128 shown in Fig. 7. It can be seen that a number of metal balls 156, such as ball bearing balls, are arranged to cooperate with the outlet port 126, which in this embodiment is formed with a ball rate. The balls 156 are retained by means of a closed closure means at some distance above the balls 156. 158, the lower spirit of which will normally be in operation of the device according to Fig. 10, the suction acting against the neck 116 will become greater the greater the pressure on the gaseous fluid dr. introduced into the lubricating device 34. In addition, the amount of lubricant flowing from the neck to the recess 120 and from there down into the suction tube 104 will become greater the stronger the suction acting on the neck 116 by selecting either one or more balls 156 of desired weight, especially in accordance with the viscosity of the liquid lubricant, however, an automatic control of the suction in the hood 118 and a corresponding discharge of lubricant from the neck 116 can be achieved, so that this amount is in direct proportion to the pressure of the gaseous fluid in the lubricator 34. This is achieved due to the the condition that the gaseous pressure fluid in the container 92 will act against the bottom ball 156 and lift it from the set 126 in accordance with the magnitude of the pressure of the gaseous fluid. The larger the gap between the ball 156 and the seat 126, the smaller the vacuum or reduced pressure, as rows in the hood 118. Correspondingly, the lubricant release from the neck 116 will be substantially equal to the amount of lubricant emitted from it at a bearing. pressure in the container 92. Accordingly, the device of Fig. 10 appears to provide a substantially constant supply of lubricant from the neck 116 for atomization and introduction into the stream of gaseous fluid to the turbine. Although the pressure of the gaseous fluid in the lubricating device 34 may vary, fairly wide borders.

Vid anvandningen Mlles verktyget igang under perioder am 15 till 30 sekunder. Viloperioderna variera fran 30 sekunder till c:a 30 minuter och kunna uppga till 16 timmar, namligen Over en natt, eller flera dagar, namligen Over veckoslut. Den totala verkliga an-van dningstiden uppgax genomsnittligt till c:a 7 till 19 minuter per arbetsdag. Den genomsnittliga vilotiden mellan arbetsperioderna uppgar till c:a 5 minuter. Betydelsen av detta Or, att dO en anvandningsperiod forekommer maste smOrjmedel tillforas, foretradesvis Mom ett fatal sekunder fran vane arbetsperiods borjan. Den lampligaste formen for tillf8rsel av smorjmedlet Or darfor i form av en smOrjmedelsdimma, eftersom en sadan dim-ma latt tages med av en letstrom till och med genom en. c:a 1,5 till 2 m lang slang. When using Mlles tool running for periods of 15 to 30 seconds. The rest periods vary from 30 seconds to about 30 minutes and can amount to 16 hours, namely Over one night, or several days, namely Over weekends. The total actual usage time averaged about 7 to 19 minutes per working day. The average rest time between work periods is about 5 minutes. The significance of this Or, that dO a period of use occurs most lubricants must be added, preferably Mom a fatal seconds from the beginning of the usual work period. The most suitable form of supply of the lubricant is therefore in the form of a lubricant mist, since such a mist is easily carried by a let current even through one. about 1.5 to 2 m long hose.

Smorjmedel i vatskeform Or joke tillfredsstallande, eftersom det icke Or fullt sa lattrorligt som smOrjmedel i form av en dimma. Dessutom skulle eventuellt de fina passagerna mellan lagrens lopringar och deras kulor kunna sa att saga overflodas av flytande smOrjmedel, varvid varvtalet eventuellt skulle kunna minska. Dessutom Or det givetvis till olagenhet om flytande smOrjmedel utstrommar fran huvudet och den yttre anden av verktygsskaftet. Lubricant in liquid form Or joke satisfactory, because it is not Or as lazy as lubricant in the form of a mist. In addition, the fine passages between the bearing rings of the bearings and their balls could possibly mean that the saw is overflowing with liquid lubricant, whereby the speed could possibly decrease. In addition, there is, of course, a lack of liquid lubricant emanating from the head and the outer spirit of the tool shaft.

Ph grund av anvandningen av smOrjmedel i form av en dimma kommer smOrjmedel att avgivas till verktygets lager i huvudsak omedelbart for vane arbetsperiod. Systemet fi3r tillforsel av smOrjmedel i form av en dimma eller i mycket finfordelad form Or saledes mycket viktigt. Due to the use of lubricant in the form of a mist, lubricant will be delivered to the tool bearing substantially immediately for the usual working period. The system for supplying lubricant in the form of a mist or in a very finely divided form is therefore very important.

Praktiska prov ha visat, att dO smorjanordningen 34 av det i fig. 5-7 visade slaget anvandes med en Oppning av c:a 1,6 mm i halsen 116 har endast c:a 18 % av den totala smorjmedelsfOrbrukningen formen av en dimma. DO halsens 116 oppning minskas till c:a 0,5 mm diameter och kulorna 156 enligt fig. 10 anvandas okas den i dimform avgivna smorjmedelsmangden till c:a 46 % av den totala mangden, men den totala smorjmedelsmangden minskas till endast c:a 8 % av den totala smorjmedelsmangd, som OtgOr i en or-dinar anordning. Detta resulterar i en nettomangd av smOrjmedel i dimform, som Or mindre an den, vilken tillfores medelst den ordinara smorjanordningen, men Oven denna minskade nettomangd av smorjmedel i dimform Or tillracklig. Practical tests have shown that when the lubricating device 34 of the type shown in Figs. 5-7 is used with an opening of about 1.6 mm in the neck 116, only about 18% of the total lubricant consumption is in the form of a mist. The opening of the DO 116 is reduced to about 0.5 mm in diameter and the balls 156 according to Fig. 10 are used. The amount of lubricant delivered in mist form is increased to about 46% of the total amount, but the total amount of lubricant is reduced to only about 8. % of the total amount of lubricant, which OtgOr in an ordinar device. This results in a net amount of lubricant in mist form, which is less than that which is supplied by means of the ordinary lubricating device, but above this, the reduced net amount of lubricant in mist form is sufficient.

Genom minskning av 8ppningen annu mera, namligen till c :a 0,4 mm diameter, mins= kas den totala smorjmedelsforbrukningen till endast 4 % av den totala smorjmedelsfOrbrukningen vid ordinara anordningar men av denna forbrukning utgor smOrjmedlet i dim-form 60 %. liven fastan detta innebar en minskning av nettomdngden av smOrjmedel i dimform, sa Or denna nettomangd avensa fullt tillrOcklig for att verktyget skall fungera tillfredsstallande. Oavsett den omstandigheten, att kostnaden for smorjmedlet kan forsummas, sa kommer den storsta delen av det forbrukade smorjmedlet att ha formen av en dimma, varvid mindre mangd flytande smOrjmedel utmatas och 'Waste uppfangas i verktygets yttre ande och avlagsnas periodiskt. Mycket mindre mangd olja kommer dessutom att 6 avgivas till fria luften, vilket innebar mindre halsorisk, mindre dalig luft for det fall att smorjmedlet luktar mindre val och langre mellanrum mellan fyllningarna av oljebehal- Laren.0 Av det ovan omtalade torde framga, att det verkliga problem, som lOsts genom foreliggande uppfinning, är det som avser tillforseln av smorjmedlet i lamplig dimform i huvudsak omedelbart vid borjan av varje igangattning av verktyget med utnyttjande av en minimal smOrjmedelsmangd. Detta uppnas medelst en tamligen enkel mekanism. MOjligen skulle en oljesmorjanordning kunna utformas att avgiva olja endast i form av en dimma, men en dylik anordning skulle utan tvivel vara omstandligare an den ovan omtalade smOrjanordningen. By reducing the opening even more, namely to about 0.4 mm diameter, the total lubricant consumption is reduced to only 4% of the total lubricant consumption in ordinary devices, but of this consumption the lubricant in mist form constitutes 60%. even though this meant a reduction in the net amount of lubricant in mist form, Or this net amount was also fully sufficient for the tool to function satisfactorily. Regardless of the fact that the cost of the lubricant can be neglected, the majority of the lubricant consumed will be in the form of a mist, with less liquid lubricant being discharged and waste being trapped in the outer spirit of the tool and periodically deposited. In addition, a much smaller amount of oil will be released into the open air, which meant less throaty, less bad air in the event that the lubricant smells less choice and longer intervals between the fillings of the oil container. It should be seen from the above that the real problem solved by the present invention is that which relates to the supply of the lubricant in a suitable fog form substantially immediately at the beginning of each actuation of the tool using a minimal amount of lubricant. This is achieved by means of a rather simple mechanism. It is possible that an oil lubricating device could be designed to dispense oil only in the form of a mist, but such a device would undoubtedly be more cumbersome than the lubricating device mentioned above.

Trots den i huvudsak automatiska regleringen av smorjmedelstillforseln till det gasformiga fluidet med hjalp av den i fig. 10 visade anordningen, som beskrivits ovan, kan den automatiska funktionen hos kulorna 156 i forhallande till satet 126 begransas till en maximal utstrackning om sà onskas, i det att tillslutningsorganet 158 skruvas neat, a att det begransar kulornas rorelse uppat till ett visst bestdmt varde. Under vissa omstandigheter kan vid en okning av trycket ph det gasformiga fluidet i smorjanordningen en motsvarande okning av sugningen i kapan 118 uppkomma, sa att en storre mangd smorjrnedel tillfores fordjupningen 120 och sugroret 104 an da kulorna 156 tillatas rora sig obehindrat pa det salt, som beskrivits i det narmast foregaende stycket. Despite the substantially automatic control of the lubricant supply to the gaseous fluid by means of the device shown in Fig. 10, as described above, the automatic operation of the balls 156 in relation to the set 126 can be limited to a maximum extent if desired, in that that the closing member 158 is unscrewed, that it restricts the movement of the balls upwards to a certain determined value. Under certain circumstances, with an increase in the pressure of the gaseous fluid in the lubricating device, a corresponding increase in the suction in the housing 118 may occur, so that a larger amount of lubricating member is supplied to the recess 120 and the suction tube 104 than when the balls 156 are allowed to move freely on the salt. described in the immediately preceding paragraph.

I den foredragna utforingsformen av de bada i fig. 7 och 10 visade anordningarna utnyttjas lampligen en annan kulkontrollventil 160 intill stigroret 94 for smorjmedel, sasom visas i fig. 7, varvid det inses, att en liknande konstruktion utnyttjas i utforingsformen enligt fig. 10. Genom anvandningen av kulkontrollventilen 160 kommer smOrjmedlet icke att stromma fran stigrorets 94 ovre ande till halsen 116 MI-ran en tillracklig sugning alstrats vid sugrorets 104 ovre dude for att kulan. 160 skall lyftas fran sitt sate. Det har i praktiken befunnits, att man vid en smorjanordning av det sasom exempel visade slaget maste rakna med ett tryck av mellan 0,3 och 0,7 kg/cm2 pa det gasformiga fluidet i smOrjanordningen innan knlan 160 borjar att lyfta sig fran sitt sate. In the preferred embodiment of the devices shown in Figs. 7 and 10, another ball control valve 160 is suitably used adjacent the lubricant riser 94, as shown in Fig. 7, it being understood that a similar construction is used in the embodiment of Figs. Through the use of the ball control valve 160, the lubricant will not flow from the upper end of the riser 94 to the neck 116 while a sufficient suction is generated at the upper dude of the rudder 104 for the ball. 160 shall be lifted from his seat. It has been found in practice that in the case of a lubricating device of the type shown, one must shave with a pressure of between 0.3 and 0.7 kg / cm 2 on the gaseous fluid in the lubricating device before the knob 160 begins to rise from its seat. .

Efter en lids anvandning av den i sin helhet speciellt i fig. 1 och 2 visade anordningen har frammande material, som filtrerats bort fran det gasformiga fluidum, vilket passerar genom filtret 24, samlats i filtrets undre del. FOr att mojliggora ett enkelt avlagsnande av sadant samlat material frail filtret hr detta i bottnen forsett med en ordinar fjaderpaverkad utloppsventil med ett for hand paverkhart ventilskaft 162, fig. 2, som utskjuter fran filteranordningen. Det inses, att utloppsporten, genom vilken materialet utmatas, omgiver ventilskaftet, och att trycket hos det gasformiga fluidet i filtret utnyttjas f8r utblasfling av det frammande materialet Iran filtret. Vid frigivning av spindeln 162 kommer den ordinara fjadern i ventilen att automatiskt stanga ventilen. After the use of the device in its entirety, especially in Figs. 1 and 2, foreign material which has been filtered away from the gaseous fluid which passes through the filter 24 has been collected in the lower part of the filter. In order to enable a simple removal of such collected material from the filter, this is provided at the bottom with an ordinary spring-actuated outlet valve with a manually actuated valve shaft 162, Fig. 2, which projects from the filter device. It will be appreciated that the outlet port through which the material is discharged surrounds the valve stem, and that the pressure of the gaseous fluid in the filter is utilized to blow out the foreign material from the filter. Upon release of the spindle 162, the ordinary spring in the valve will automatically close the valve.

De principiella sardragen hos och fOrdelama med den ovan beskrivna manoveranordningen kunna Oven uppnas pa ett nagot enklare satt, sasom visas i utforingsexemplet enligt fig. 9. I utforingsformen enligt fig. 9 hr inloppsledningen 164 fran tillforselkallan for tryckfluidum forbunden med inloppet till den magnetpaverkade inloppsventilen 166, som är anordnad i husets 10 undre ande. Magneten 168 paverkar en kolv 170, vars hogra Uncle hr anordnad att samverka med utloppet fran ett ventilmunstycke 172, med vilket inloppsledningen 164 är forbundet. Munstycket 172 Oppnar sig in i ett halrum 174, som genom porten 176 hr forbundet med utloppsnippeln 178, vilken är inskruvad i filteranordningens 180 undre ande. The principal features and advantages of the above-described operating device can also be achieved in a somewhat simpler manner, as shown in the embodiment of Fig. 9. In the embodiment of Fig. 9, the inlet line 164 of the supply fluid for pressure fluid connected to the inlet of the solenoid valve 16 , which is arranged in the lower spirit of the housing 10. The magnet 168 acts on a piston 170, the right of which is arranged to cooperate with the outlet of a valve nozzle 172, to which the inlet line 164 is connected. The nozzle 172 opens into a cavity 174, which through the port 176 hr is connected to the outlet nipple 178, which is screwed into the lower end of the filter device 180.

Kolvens 170 diameter dr mindre an magnetens 168 inre diameter, varigenom en passage 182 stracker sig mellan halrummet 174 i yentilen 166 och en utloppsnippel 184. Utloppsnippeln 184 forbinder ett utloppsror 186 med ventilen 166, varvid vid rarets 186 yttre ande lampligen hr anordnad en lamplig ljuddampare, sasom en packe av fint metallndt 188, som dr ansluten till rorets 186 yttre ande. Eftersom vatskekondensat kan utkomma fran filtret 180 hr det lampligt att anordna ett absorberingsorgan 190, t. ex. ett filtstycke, vid metallnatpackens 188 undre ande, sa att eventuellt kondensat icke kommer att samla sig pa husets 10 botten. The diameter of the piston 170 is smaller than the inner diameter of the magnet 168, whereby a passage 182 extends between the cavity 174 in the yantile 166 and an outlet nipple 184. The outlet nipple 184 connects an outlet pipe 186 to the valve 166, a suitable muffler being arranged at the outer end of the tube 186. , such as a package of fine metal 188, which is connected to the outer spirit of the rudder 186. Since liquid condensate can come out of the filter 180, it is convenient to provide an absorber 190, e.g. a piece of felt, at the lower end of the metal night pack 188, so that any condensate will not accumulate on the bottom of the housing 10.

Av det ovan omtalade framgar, att gasformigt fluidum under tryck instrOmmar i filtret genom nippeln 178 och strommar genom det inre av en central spindel 192, vilken Or forsedd med en utloppsport 194. Det gasformiga fluidet kommer darfor att instrOmma i den undre delen av filterhaligheten i filtret 180, a att det kommunicerar med filtermedlets 196 utsida, varefter fluidet strommar genom filtermedlet och in i ett centralt rOr 198, som hr forsett med en inloppsport 200. Fill-rats ror 198 hr icke forbundet med passagen i den centrala spindeln 192 i filtret. From the above it appears that gaseous fluid under pressure flows into the filter through the nipple 178 and flows through the interior of a central spindle 192, which Or is provided with an outlet port 194. The gaseous fluid will therefore flow into the lower part of the filter cavity in the filter 180, a that it communicates with the outside of the filter means 196, after which the fluid flows through the filter means and into a central tube 198, which is provided with an inlet port 200. Fill-tube tubes 198 hr not connected to the passage in the central mandrel 192 in the filter .

Filtrets huvud 202 hr utformat med ett ventilate 204 i den ovre anden ay det centrala roret 198, vilket sate hr anordnat att samver- 7 ka med ett kulventilorgan 206, som paverkas av en tryckfjader 208, vars Ovre ande halles under reglerbar spanning medelst en gangad spindel 210, som i sin ovre ande är forsedd med ett vred 212, vilket skjuter upp fran husets 10 oversida. The head 202 of the filter is formed with a vent 204 in the upper spirit and the central tube 198, which is arranged to cooperate with a ball valve member 206, which is actuated by a compression spring 208, the upper spirit of which is kept under adjustable tension by means of a passage spindle 210, which in its upper spirit is provided with a knob 212, which projects from the upper side of the housing 10.

Det framgar av den visade konstruktionen av huvudet, att ventilen, inneballande kulan 206, som samverkar med salet 204, kommer att reglera det tryck, som overfores till utloppsnippeln 214 fran filteranordningen 180 inom tamligen snava granser trots den omstandigheten, att trycket pa det gasformiga fluidet, som tillftires genom inloppsledningen 164, kan variera fran tid till annan Mom tamligen vida granser, namligen exempelvis mellan c:a 1 och 3 kg/cm2. It can be seen from the construction of the head shown that the valve, enclosing the ball 206, which cooperates with the saddle 204, will regulate the pressure transmitted to the outlet nipple 214 from the filter device 180 within rather narrow limits despite the fact that the pressure on the gaseous fluid , which is supplied through the inlet line 164, can vary from time to time, but rather wide limits, namely for instance between about 1 and 3 kg / cm2.

I tidigare utforandet av delta slags luftfilter har ventilen bestatt av ett platt ventilorgan, som varit anordnat att samverka med ett bal. En ringa vridning av ventilen medfor harvid en kraftig andring av det medelst ventilorganet blockerade genomstromningstva.rsnittet, varigenom en mycket dalig reglering erhalles. Vid anordningen enligt fOreliggande uppfinning, varvid en fjaderpaverkad kula 206 anvandes, medfor en ringa vridning av ventilmanovervredet en liten andring av tryckkraften hos den fjader, som paverkar kulan 204 mot dennas sate, sá att sma andringar av lufttrycket kunna astadkommas. Sasom omtalats ovan medfor fjadern aven en automatisk reglering av lufttrycket pa grund av den omstandigheten, att varje Okning av trycket automatiskt motes av en Wining av tryckkraften hos den fjader, som trycker kuIan 206 mot dennas sate 204. 138. motsvarande satt kommer fjadern att vid minskande tryck expandera och darmed motverka tryckminskningen. In the previous embodiment of the delta type air filter, the valve has consisted of a flat valve member, which has been arranged to cooperate with a bale. A slight rotation of the valve entails a sharp change in the flow cross-section blocked by the valve means, whereby a very poor control is obtained. In the device according to the present invention, in which a spring-actuated ball 206 is used, a slight rotation of the valve control knob causes a small change in the compressive force of the spring which acts on the ball 204 against its seat, so that small changes in the air pressure can be effected. As mentioned above, the spring also entails an automatic regulation of the air pressure due to the fact that each increase in pressure is automatically counteracted by a winding of the compressive force of the spring which presses the ball 206 against its seat 204. 138. correspondingly, the spring will decreasing pressure expand and thereby counteract the pressure reduction.

Storleken pa det tryck, som erhalles fran filteranordningen 180 kan latt bestammas me-deist en tryckmatare 216, som är av samma utforande som mataren 26 enligt fig. 1 och 2, varvid mataren 216 ar ansluten mellan filteranordningen 180 och smOrjanordningen 34 enligt fig. 9. Del inses att smorjanordningen 34 i fig. 9 är i huvudsak av sal-ulna utforande som visas i fig. 2, 6 och 7. Om sa. onskas kan smOrjanordningen enligt fig. 9 aven inkludera de detaljer, som askadliggOras speciellt i fig. 10. The magnitude of the pressure obtained from the filter device 180 can be easily determined by means of a pressure feeder 216, which is of the same design as the feeder 26 according to Figs. 1 and 2, the feeder 216 being connected between the filter device 180 and the lubricating device 34 according to Fig. 9. It will be appreciated that the lubricating device 34 in Fig. 9 is substantially of the saddle design shown in Figs. 2, 6 and 7. If so. If desired, the lubricating device according to Fig. 9 may also include the details which are particularly damaged in Fig. 10.

En av fordelarna med den i fig. 9 visade utforingsformen av manOveranordningen bestar i den automatiska utmatningen av frammande material, som avlagsnats fran det gasformiga fluidet genom utblasning av materialet frail filtret pa det ovan omtalade sattet. Vida-re kommer en dylik omedelbar frigivning av trycket i filteranordningen 180 likaledes att underlatta verktygets stoppande, da manoverstromstallaren for magneten -168 oppnas. One of the advantages of the embodiment of the operating device shown in Fig. 9 consists in the automatic discharge of foreign material which has been removed from the gaseous fluid by blowing out the material from the filter in the manner mentioned above. Furthermore, such an immediate release of the pressure in the filter device 180 will likewise facilitate the stopping of the tool when the operating current switch for the magnet -168 is opened.

UtfOringsformen enligt fig. 9 tillater aven anvandningen av ett annat slags mekanism f6r tillforsel av vatten till verktyget 48, vilken mekanisrn visas i detalj i fig. 9. Mekanismen innehMler en nalventil 218, som exempelvis kan vara av samma utforande som den i fig. 8 visade. Ett manuellt paverkbart vred 220 skjuter upp fran ventilens Ovre ande och locket 222 till en tillsluten vattenbehallare 224 ar anslutet till nalventilens 218 undre ande. Genom locket 222 och tatat i forhallande till delta stracker sig ett utloppsror 226, till vilket en bojlig slang 228 till verktyget 48 dr ansluten. For enkelhetens skull kan slangen 228 vara parallell med eller till och med fOrbunden med den bojliga tillforselslangen 28, som leder det gasformiga fluidet till verktyget. The embodiment according to Fig. 9 also allows the use of another kind of mechanism for supplying water to the tool 48, which mechanism is shown in detail in Fig. 9. The mechanism comprises a needle valve 218, which may for example be of the same design as that in Fig. 8. showed. A manually actuable knob 220 projects from the upper end of the valve and the lid 222 of a closed water tank 224 is connected to the lower end of the needle valve 218. Extending through the cover 222 and tat in relation to the delta is an outlet pipe 226, to which a flexible hose 228 to the tool 48 dr is connected. For simplicity, the hose 228 may be parallel to or even connected to the flexible supply hose 28 which directs the gaseous fluid to the tool.

Vid anvandning av det i fig. 9 med heldragna linjer visade utfOringsformen av vattentillforselanordningen är det icke nodvandigt att anvanda en magnetpaverkad ventil for anordningens mantivrerande. Da t. ex. den magnetpaverkade inloppsventilen 166 oppnas fOr drivning av verktyget kommer gasformigt fluidum icke endast att stromma fran filteranordningens 202 huvud till tillforselsystemet for verktyget utan det gasformiga tryckfluidet kommer likaledes att infOras i den ovre delen av vattenbehMlaren 224 da nalventilen 218 Oppnats till onskad utstrackning. Dâ vattnet I behallaren 224 paverkas av trycket kommer det att matas genom den bojliga slangen 228 till verktyget i overensstammelse med nalventilens 218 installning. Om man icke tinskar nagot vatten under arbetet med verktyget behover man endast stanga nalventilen 218, varefter inget vatten tillfores verktyget. When using the embodiment of the water supply device shown in solid lines in Fig. 9, it is not necessary to use a magnet actuated valve for maneuvering the device. Da t. Ex. When the magnetically actuated inlet valve 166 is opened to drive the tool, gaseous fluid will not only flow from the head of the filter device 202 to the supply system of the tool but the gaseous pressure fluid will likewise be introduced into the upper part of the water tank 224 when the valve 218 is opened. When the water in the container 224 is affected by the pressure, it will be fed through the flexible hose 228 to the tool in accordance with the installation of the needle valve 218. If no water is thawed during work on the tool, only the needle valve 218 needs to be closed, after which no water is supplied to the tool.

Den ovan beskrivna utforingsformen euligt fig. 9 lampar sig alltsa for anvandning i en barbar manOveranordning, dar det eventuellt icke är nrojligt att bekvamt ansluta anordningen till en vattentillfiirselkalla medan daremot en Ulla for gasformigt tryckfluidum finnes tillganglig. The above-described embodiment according to Fig. 9 is thus suitable for use in a barbaric operating device, where it may not be possible to conveniently connect the device to a water supply source, while on the other hand a Ulla for gaseous pressure fluid is available.

I stallet for att anvanda den i fig. 9 med heldragna linjer visade vattentillforselmekanismen kan den i fig. 9 visade manoveranordningen vara forsedd med den med streckade linjer visade vattentillforselanordningen, vii-ken innehaller en magnetpaverkad vattenventil 38 till vilken en vatteninloppsledning 36 och en vattenutloppsledning 46 aro anslutna. Del inses, att vatteninloppsledningen 36 under dessa omstandigheter kommer att anslutas till en lamplig kalla for vattentillforsel medan en bojlig slang, som leder till verktyget, kommer att anslutas till vattenutloppsledningens 46 yttre ande. Vattenventilens 38 8 magnet anslutes awn till den i fig. 4 visade manoverstrOmstallaren 142 pa samma satt som i utforingsformen enligt fig. 1 och 2. Vi-dare kommer en nalventil 42 likaledes att for enkelhetens skull anslutas direkt till vattenventilen 38 i stallet for att man anvander den i fig. 2 visade anordningen. Instead of using the water supply mechanism shown in solid lines in Fig. 9, the operating device shown in Fig. 9 may be provided with the water supply device shown in broken lines, which contains a magnetically actuated water valve 38 to which a water inlet line 36 and a water outlet line 46 are connected. It will be appreciated that under these conditions the water inlet conduit 36 will be connected to a suitable cold water supply while a flexible hose leading to the tool will be connected to the outer spirit of the water outlet conduit 46. The magnet of the water valve 388 is connected to the control switch 142 shown in Fig. 4 in the same manner as in the embodiment of Figs. 1 and 2. Furthermore, a needle valve 42 will likewise be connected directly to the water valve 38 in the stable for the sake of simplicity. uses the device shown in Fig. 2.

Av det ovan omtalade framgar, att foreliggande uppfinning innefattar ett antal utforingsformer av en manoveranordning for dentalverktyg, vilken anordning är paverkbar fOr tillforsel av gasformigt fluidum under reglerade tryckfiirhallanden alit efter 5nskan med hansyn till dentalverktygets forutbestamda varvtal. Trycken dro exakt installbara, sâ att ett forutbestamt varvtal hos verktyget kan uppratthallas. Samtliga utforingsformerna innehalla vidare filteranordningar, sa att icke nagra namnvarda mangder av frammande material komma att medfolja det gasformiga fluidum, som ledes till verktyget i och flir dettas drivning. Trycket pa det gasformiga fluidum, som ledes till verktyget, är Nit avlashart pa lampliga skalor. Lampligt smorjmedel infores likasa i det gasformiga fluidet me-deist manoveranordningen, s att verktygets lager komma att smorjas tillfredsstallande och automatiskt. Olika slags manOverventiler ha anordnats for reglering av trycket pa det gasformiga fluidum som ledes till verktyget och regleringsventiler aro anordnade i de element i manoveranordningen, medelst vilka vatten kan ledas till verktyget efter onskan. From the above it appears that the present invention comprises a number of embodiments of a maneuvering device for dental tools, which device is actuatable for supplying gaseous fluid under controlled pressure conditions alit as desired with respect to the predetermined speed of the dental tool. The pressures were precisely installable, so that a predetermined speed of the tool could be maintained. All of the embodiments further include filter devices, so that no significant amounts of foreign material will accompany the gaseous fluid which is led to the tool in and out of its drive. The pressure of the gaseous fluid, which is led to the tool, is Nit relief hard on suitable scales. Lamp lubricant is also introduced into the gaseous fluid by the actuator so that the tool bearings are lubricated satisfactorily and automatically. Various types of control valves have been provided for regulating the pressure of the gaseous fluid which is led to the tool and control valves are arranged in the elements of the control device, by means of which water can be led to the tool as desired.

Bekvamt paverkbara, pa nagot avstand anordnade stromstallare finnas fOr manovrering av de magnetpaverkade ventilerna for bade tillforseln av gasformigt fluidum och vatten till verktyget. Ett flertal utforingsformer av vattentillforselanordningar inkluderas i uppfinningen, liksom aven ett flertal utfOringsformer av manovermekanismer for reglering av smorjrnedelstillforseln. I det hela erbjudes man maximal bekvamlighet vid handhavandet av dentalverktyget pa grund av de olika utforingsformer av manoveranordningar, som visats och beskrivits, och vilka anordningar krava ett minimum av manuellt handhavande eller inregleringar. Avlagsnande av uppsamlat frammande material frail filteranordningarna astadkommes likaledes medelst enkla anordningar, av vilka en är automatiskt paverkbar. Conveniently actuated, at some distance arranged power switches are for maneuvering the magnetically actuated valves for both the supply of gaseous fluid and water to the tool. A plurality of embodiments of water supply devices are included in the invention, as well as a plurality of embodiments of operating mechanisms for controlling the lubricant supply. On the whole, maximum comfort is offered in the handling of the dental tool due to the different embodiments of maneuvering devices, which are shown and described, and which devices require a minimum of manual handling or adjustments. Removal of collected foreign material from the filter devices is likewise effected by means of simple devices, one of which is automatically actuable.

Med hanvisning till fig. 11 visas en upphangningsanordning for verktyget, vilken be-star av ett ror 302 med en bricka 304 anordnad mellan rorets. andar. Sasom visas pa ritningen star verktyget 306 pa brickan 304, dd. det anbragts i roret, och luftslangen 308 passerar genom brickan och ut genom rOrets undre ande. Roret Or rnonterat pa en manoveranordning 309 medelst hallare 310 och manoveranordningen anbringas normalt vid sidan av ett instrurnentstativ sasom visas vid 311. Referring to Fig. 11, there is shown a suspension device for the tool, which consists of a rudder 302 with a washer 304 arranged between the rudders. andar. As shown in the drawing, the tool 306 stands on the washer 304, dd. it is placed in the rudder, and the air hose 308 passes through the washer and out through the lower end of the rudder. The rudder is mounted on an actuator 309 by means of holders 310 and the actuator is normally mounted next to an instrument stand as shown at 311.

Den beskrivna anordningen fa sthaller verktyget da detta icke anvandes. Riirets 302 byre ande befinner sig pa ungefar samma hojd som patientens munt, dvs. normalt c :a 1,2 m fran golvet, varvid den kommer att hâlla slangen i en slinga ovanfOr patienten dã verktyget anvandes. Hoj den pa rorets Ovre del a" sadan, att dâ verktyget drages ut ur roret kommer den fran roret utkommande slangen att uppbaras ur vagen for patienten. The described device holds the tool when it is not in use. The barrel spirit of the tube 302 is at about the same height as the patient's mouth, i.e. normally about 1.2 m from the floor, whereby it will hold the tube in a loop above the patient when the tool is used. Raise the upper part of the tube so that when the tool is pulled out of the tube, the tube coming out of the tube will be carried out of the patient's cart.

Claims

Patent claim:

A device for dental handpieces or the like, which is driven by a pressurized gas turbine, stored in rolling bearings, characterized in that the stream of filter-purified pressurized gas, which drives the turbine, is generated and allowed to absorb a lubricant mist before it enters the handpiece and that at least a portion of the pressurized gas flows through the bearing handpiece.

Device according to claim 1, characterized in that the pressurized gas, which drives the turbine, is passed through an apparatus known per se, where the gas stream generates and absorbs the lubricant mist.

3. Device according to claim 2, characterized in that the lubricant mist is generated by automatically regulating the supplied oil quantity by means of a valve operating in dependence on the gas pressure to be installed in each case in a quantity corresponding to the quantity of the flowing gas, in order to a constant amount of lubricant in the gas stream.

4. Device according to any one of patent claims 1-3, characterized in that a device for controlling the amount of gas supplied to the handpiece is arranged in the gas stream, before the atomizing apparatus, which generates the lubricant mist.

Device according to one of claims 1 to 4, characterized in that the control device on the edge consists of a pressure regulator and a shut-off valve or the like.

6. Device according to any one of claims 1-5, characterized in that a filter device for purifying the gas Or arranged for the atomization apparatus resp. the control device for regulating the amount of gas supplied to the handpiece.

Device according to claim 6, characterized by devices for removing foreign objects from the filter, namely a three-way valve and a drain connected thereto, which valve is arranged to connect the pressurized gas shell to the filter and close the drain, while in a the second layer shuts off the gas stream in and out of the stopper of the handpiece, but at the same time connects the filter to the drain, so that when the pressure is equalized against the atmosphere, the salient gas emitting entrains the advancing molds from the outside of the filter.

Device according to any one of claims 1-7, characterized in that the devices for supplying lubricant mist to the gas stream, the regulating devices for the gas stream, the filter devices and possibly further control devices for additional functions of the handpiece are arranged in a common control unit between the compressed gas generator and the handpiece. Request Publications: U.S. Patent Nos. 2,442,202.