DE7345801U - Device for filling tooth cavities with filler - Google Patents

Description

lM.a, b / 72 .. ' ^: ..' · .. ".. ': ..27th Sept. 1974

Applicant:

Dr "tned. dent. Rüdiger llirdes, 4630 Bochum, Tlppelsberger Str.

^ "Device for filling

from
Tooth cavities with fillers' ^

The innovation concerns a device for filling tooth cavities with fillers, e.g. with amalgam, which has a filler neck and one in a guide channel to be moved back and forth into the filler neck and one transverse to the filler neck arranged magazine opening into it, from which a Mcgazin thrust axis guided in a second guide channel at the beginning of the working stroke that begins near the mouth of the magazine and ends at the outlet of the filler neck the filling thrust axis is to push part of the filler into the filler neck.

To fill tooth cavities have so far been used in dentistry only instruments or auxiliary devices are used, with the working ends of which one could either only fill or only stopper, so

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that the previously usual method of working with a filling consisted of a constant change of two instruments between the dentist and the dental assistant. While the stuffing instruments with their convex, mostly spherical, conical or cylindrical working ends have not changed significantly in the course of development have experienced, in addition to the most frequently used so-called amalgam carriers in recent years other devices known.

The usual amalgam carriers require a considerable amount of practice and skill on the part of the dental assistant in order to apply an amalgam portion with the fingers of one hand to the uneven, mostly grid-like working end of the amalgam carrier held with the other hand. Not rarely been applied amalgam portion falls on the way from the hand of the dental assistant to hand d s dentist to the dental cavity by unforeseen shocks from amalgam fillings, which time and material losses are inevitable.

About this evil of falling down a portion of amalgam On the way from the dental assistant to the dentist to the tooth cavity to be filled, one has next to tried to create various devices for the known "amalgam pistols", but the one to be used in such a device Do not carry filler in any way. Because a filler for

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Zahr.kavitäten must due to its use and its Destination meet certain requirements.

The filling material most commonly used today is a silver-tin amalgam. For the composition of this silver-tin amalgam, the American "National Bureau of Standards" as well as the "American Dental Association" and the "Federation Dentaire Internationale" recommend a silver content of 65%, a tin content of 25%, a copper content of 6% , a zinc content of 2%, a mercury content of 3 % and traces of gold and platinum. In addition to expansion, the relatively high silver content results in great hardness, low flow and rapid solidification (hard), while tin reduces expansion and delays hardening. «The plasticity period of such an amalgam is approx. 5 min. - 10 min with a curing time of approx. 2 hours. It follows that the ^ - ■ at issue standing amalgam during its plasticity 5 min - must be introduced for 10 minutes into an appropriate filling device, discharged from this filling device in the Zahnkavltät and condenses there _0th.

The condensability of the amalgam is understood here its ability to compress itself under the action of external pressure, removing the air pockets present in it and let the excess mercury leak out,

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vas is noticeable in a so-called "Schneebailknirsehen" power. Small portions of amalgam should always be introduced quickly into the tooth cavity and the retentions, Nooks and crannies of the cavity are first filled and well compacted v / earth.

A known device (according to DT-OS 1 491 002) of the aforementioned Genus has a telescopic telescopic spiral spring that both the magazine and a part the magazine thrust axis forms. The coil spring is with a decreasing inrien cross-section provided and over a nearby of the filler neck arranged, removable cap to fill. The cross section of the filler neck narrows drastically from the Muzzle of the magazine thrust axis up to its outlet opening ο

This device is not functional because amalgam is a compressible medium due to its inclusions in the air The continuity equation of fluid mechanics cannot be applied. A strong compression - or as it is called in the technical jargon: "condensation" - of the amalgam pulls directly because of the leakage quick hardening on mercury. That has drastic effects on eggs here in the filler neck

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Condensation results in an immediate pre-hardening and a corresponding setting of the amalgam in the filler neck, whereby the desired contraction of the seal insert is completely prevented. The elasticity of the sealing insert also has the disadvantage that the front, not guided at this point part of the filling thrust axis on the leading edge of the "üllstutzens can put on.

Furthermore, a dental cavity by the usual today i ^r .avit "tenpräparationen afterBlack basic sense, small amounts of amalgam are when filling desired, to fill in every last corner of a tooth cavity with good condensation Cieses unit delivers exactly the opposite, namely only;.: Large and then smaller and smaller amounts of filler, with lime tree in the form of a hardened amalgam wallpaper forming between the individual turns of the spiral spring In the meantime, the dentist is given the alternative of either continuing the filling process with a second filled device or starting the filling. The filling process here is time-consuming of the magazine also the G Risk of amalgam prehaving.

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This compartment part is also found in another known device according to US Pat. No. 3,623,224. Because here the head of the device must be removed before a tube member serving as a magazine and firmly connected to the device can be filled with amalgam. In addition, this device is extremely prone to failure and not usable because of the relatively large, but required height of its head, since the working space for such a ^ device between the open rows of teeth has a height of about 12 to 15 mm analogous to the dimensions of a drill in the head part of a Contra-angle must not exceed.

In another known device of the type mentioned at the beginning (laughing at US Pat. No. 3,638,314), the filling thrust axis and the magazine thrust axis are to be operated by hand against the force of springs. This device is only for filling, but not Can also be used as a tamper, as the dentist is for this purpose

with the index finger of his hand exert a pressure on the front end of the device and at the same time under the force of one Feather standing filling-thrust axis with his wrist in the inserted Must hold position. Furthermore, the amalgam capsule disclosed here is not a magazine in the sense of the invention, but rather just an expensive single-use capsule with a rectangular, conical interior. That has the advantage that while the extension of the magazine piston a part of the amalgam and the Mercury behind the piston in the free space of the capsule

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which causes the piston after emptying: the! capsule par not iii its posterior position withdrawn and the il-capsule can be removed »

Another device of the type mentioned at the beginning (according to GB-PS 034 235) has a guide channel with a relatively wide clearance guided filling-thrust axis with one at its front Piston arranged at the end and a magazine thrust axis guided in a second guide channel with a v / pus Pistons. The filling thrust axis and the magazine thrust axis are each under the action of the force at their rear end a feather. One of these springs has the task of moving the piston of the filling / thrust axis within the interior of a Hold the hole until a slide is manually moved forward. The other feather has the task of making filler material from one to press the second guide channel serving as a reserve container continuously into the upper cavity of the filler neck. That The rear end of the filling thrust axle has a gearwheel which is arranged with a gear at the rear end of the magazine thrust axle Rack in engagement With this device, which can only be operated manually, the movement of the slide must in each case against the force of at least one spring, which is not only a corresponding force, but also a relative requires great skill to quickly fill a tooth cavity. Because the spring acting on the magazine thrust axis

f - 8 -

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i-iit siel: when the magazine is being emptied, its preload is reduced, the amalgam portions pushed by the magazine thrust axis in O.en'il 1 .stutzen tend to be correspondingly depressive. The preload of this magazine thrust spring must be dimensioned relatively large, which in turn means that the slide, due to the gear connection between the filling thrust axis and the magazine thrust axis, has to be pushed forward against a relatively large spring tension. Another disadvantage is that: "- to fill the non-removable" ap.azins the dentist has to hand the device back to his assistant for filling and then either continue to work with another device or wait for the device to be refilled. This cumbersome and time-consuming way of working becomes particularly fracrwiirdic if, in the course of long-term treatment, when filling several teeth during a session in the sail, repeated draining of the work area is necessary.

And finally, a device is known from US-PS 3 751 807), which essentially consists of a piston acted upon by air on both sides, the piston rod of which over a pölzen is coupled to a cam which receives the cross pin of a filler pin at its front end by means of a fork. The alternating action of the air piston causes the filler pen to be swiveled up and down, causing it to move out a magazine arranged transversely to its direction of movement

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Atoalgam portions through a tubular attachment into the tooth cavity presses. Here, too, the magazine piston is under the force of a compression spring, which is pretensioned with the magazine being emptied continuously decreases. As a result, portions of Amalgara of different sizes are in different precondensed states printed by the magazine piston in the movement path of the filler pen. This device is not suitable and required for plugging a relatively large one for dispatching the magazine Expenditure of time. A cleaning of the magazine is essential, otherwise when the magazine piston sticks due to hardened Amalgam parts no amalgam can be pressed in the direction of movement of the filling pen. And finally he can Non-guided filler pen tilted counterclockwise from the cam in its top dead center position and tilted will.

^v - · 'Of this has auegehend, the present innovation is the object to provide a device of the initially described type, the rapid charge of filler' ensured and is formed as stb'rungs- and maintenance-free amalgam machine, which is independent of Dexterity of the dentist concerned can eject very small and constant! • ■ narrow fillers with constant physical properties and at the same time ensure excellent condensation as a plugger.

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This object is achieved according to the invention in that the device has a removable interchangeable magazine and its filling-thrust axis and its magazine thrust axis by a single, common drive that coordinates their movements with one another are coupled to one another, which consists either of a mechanical transmission or of a pneumatic drive arrangement. In this way, the filling-thrust axis can with every working stroke A small amount of the filler can be pressed into the tooth cavity, where they are each condensed directly can, because when ejecting this small amount of filler, the filling thrust axis Due to its special coupling with the magazine thrust axis, the outlet of the filler neck closes and this then acts as a tamper. Due to the existing change magazine, the emptied magazine can be moved within a few seconds can be exchanged for a new magazine that has been filled in the meantime by the dental assistant.

Furthermore, the rapid expulsion of the smallest amounts of filler results in a much denser filling structure than with the previously known devices and thus ensures a better wall and edge seal with a correspondingly longer service life of the fillings due to the excellent condensation of the smallest Amalganiportionen. And finally, with this device, as part of long-term treatments, several teeth can be used at the same time in one session without repeated drying

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of the work area under perfectly hygienic conditions can be filled in an incomparably small amount of time.

Since the working stroke of the filling thrust axis is limited because of the! Working space between the open rows of teeth a height of must not exceed about 12 mm - 15 mm, the ejection, the plugging and the condensation of the amount of filler takes place in rapid succession, with a regulation of the speed over

^v the setting of a corresponding drive unit in

Within the physiological tolerance limits is possible.

Due to the continuous feed, which will be described in more detail the magazine thrust axis is the filler in the magazine under one continuous compressive stress, whereby the filler reaches the tooth cavity in a constantly pre-compressed state. Since here the device is designed as an amalgam machine and the working stroke of the filling thrust axis always ends at the outlet of the filling nozzle, and - as will be explained in detail - is easy to hold in this end position, can be designed very clearly Device then be used as a tamping instrument.

According to an advantageous feature of the innovation, the mechanical gear consists of a filling-thrust axis driving, with a crank, push rod and cross-head piston and the magazine push axis from one via the crank

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driving and rack-and-pinion gear connected to the latter. The advantage of this mechanical transmission is based in particular on the fact that this device is equipped with a corresponding Electric motor as a drive unit completely independent of the other technical equipment in a dental practice Can be used, be it that the mechanical transmission via an electric motor fed from a voltage network or is driven by a battery-powered electric motor.

According to another advantageous feature of the 'innovation exists the pneumatic drive arrangement consisting of at least one manual control valve and two rotary pistons acted on from both sides, of which the one with the rear end of the filling thrust axis and the other with the rear end of the Magaain-Schubachsfc is firmly connected. The particular advantage of this pneumatic drive arrangement is to be seen in the fact that an air compressor required for this can be found in every dental practice and this pneumatic drive arrangement is largely maintenance-free.

Further particularly advantageous design features of the innovation • ind in the claims for protection and in the attached drawings described. ! at show:

. 1: The cross section through a new device with mechanical

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Drive arrangement on a scale of about 2.5: 1,

Fig. 2: a sectional view along the line II / II of Fig. 1,

Fig. 3: the plan view of the device of Fig. 1 in part-part Cut,

Fig. 4: the cross section through the new device with a

pneumatic drive arrangement with displacing filling / thrust axis somewhat *. on a scale of 2.5: 1,

Fig. 5: a sectional view along the line V / V of Fig. 4,

FIG. 6: the sectional view of FIG. 4 with the Fü11 thrust axis pushing back,

FIG. 7: the device from FIG. 4 with the filling thrust axis pushed forward and at a standstill and pushed back Magazine thrust axis,

8: a sectional view through a further embodiment of the device of Fig. 4 with two manual control valves with advancing filling-thrust axis and advancing magazine thrust axis,

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Fig. 9: the device of Fig. 3 with the back-sliding filling-thrust axis and advancing Tlagazin-thrust axis,

FIG. 10: the device from FIG. 8 with the filling and thrust axis pushed back and retracted magazine cchub axis in the unpressurized operating state, and

Fig. 11
^v - to 13: different forms of training for those with a

Bayonet coupling releasably to be attached to the locking sleeve stuffing sleeve on a scale of about 4: 1.

In the figures, 1 denotes the filling thrust axis, 1 'its guide channel, 2 ^{denotes the magazine * thrust axis, 2 1} denotes its guide channel, 3 denotes the magazine and 4 denotes the filler neck. _; The filling thrust axis 1 and the magazine thrust axis 2 are in the; ^{v /} embodiments illustrated ^l -.... with each other in a Community \ seed symmetry plane, the plane of the drawing is equal to j, and are made of one flexible wire of corrosion resistant, j sterilizable metal or plastic. In the exemplary embodiments, the magazine 3 consists of a circular, cylindrical sleeve with conical ends 3 ', 3 ", which can be detachably inserted between the filler neck 4 and the magazine thrust axis 2 in correspondingly shaped mating surfaces. Thrust axis 2 and also the magazine 3 J

Hi 161a, b / 72 - If. - Sept. 27th _o i>,

are advantageously made of a plastic with high temperature resistance, e.g. from a halogenated polyethylene, in particular a polytrifluoroethylene or a polytetrafluoroethylene, or from a polyvinyl carbazole, a polyacrylonitrile, a phenolformaldehyde resin, a silicone resin, a chlorinated polyether or from a higher polyolefin, e.g. a polypropylene, a polyvinylidene chloride or from a polyisobutylene.

The part of the amount of filler to be pressed from the magazine 3 into the filler neck 4 with each working stroke of the filler thrust axis 1 is about as high as the clear height h of the magazine opening 3 " ¹ and about εο wide as the inside diameter d of the filler neck 4. It goes without saying that the cross-sectional shape of the interior 3 ^{v of} the magazine 3 can be circular as well as elliptical or rectangular, if only it is always ensured that

^ This Cu section shape is constant over the entire length of the magazine 3 so that no amalgam residues stick to the magazine wall when the magazine thrust axis 2 is pushed through.

The magazine 3 rests with its ignition 3 ¹ facing away from the filler neck 4 on a sliding block 6 which is slidably displaceable against the force of a spring 5 and is guided coaxially to the magazine thrust axis 2. The sliding block 6 and the spring 5 are housed in a sleeve 7 which is provided with a locking pin 8 which, on the one hand, determines the bias of the spring 5

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and on the other hand the! ailissenstein C leads in a Kut G ¹ . Ilerausne'naen Zur.i and replacement needs the magazine 3 only ent; s: 's of "raft i'er Peder S of Linde 3 ¹ toward zuriickpedrückt, the dor ^ a ¹ U' before Jes IY: I lstut! zens 4 am ' ^: magazine end 3 "swiveled out and then with the other magazine end 3' removed from the surface of the Xulisssnsteines 6 to ground. The minimum amount of money in magazine 3 takes place in reverse order. It is essential that when removing and inserting the

Magazine 3 always the magazine thrust axis 2 from the Üagazin interior 3 'is withdrawn.

The filler neck 4 consists of a locking sleeve 4 1 firmly connected to the end 1 ″ of the guide ^{channel I 1 of the filler thrust axis 1} and a detachable locking sleeve 4 ″ at the other end 4 ″ with a screw connection or a bayonet coupling 4 ^IM (see in particular FIG. 1) to be fastened Stopfhülse 4, which may have, depending on \) size and nature of the filling cavity having a differently sized cylindrical, a conical or a spherical shape and can be replaced rapidly by means of, for example, of the bayonet coupling 4 "'s (Fig. 11 -. 13 ).

In the embodiment of the new device shown in FIGS. 1 to 3, the filling-thrust axis 1 and the maga ζ in-thrust axis 2 are coupled to one another by a mechanical transmission. This mechanical gear consists of a filling-thrust axis

Hi 161a, b / 72 - 17 -. ".". "". '' H. Sept. 1974

driving, with crank 9, push rod 10 and crosshead piston provided slider crank mechanism 9, 10, 11 and on a rack gear 12 driving the magazine push axis 2 via the crank 9 and connected to the latter 2. The crosshead piston 11 is centric with the rear end 1 of the Filling-thrust axis 1 and is guided ^{in a sleeve II 1.} The crank 9 is designed as a flat bevel gear 9 protruding beyond the path diameter 9 'of the push rod pin 9 ″. This bevel gear 9 is in engagement with a conical drive pinion 13, the axis 13 * of which is aligned with the axis of the crosshead piston 11 and with the filling thrust axis 1, at the rear end 13 "of the axis 13 'of the drive pinion 13 protruding from the device, a known plug-in coupling 14 and between this plug-in coupling ^ and the end 13" a slip clutch 15 are arranged.

The axis of rotation 9 "'of the bevel gear 9 lies in the symmetry V.V. level of the device. The rack and pinion gear 12 consists of a circle-like grid located on the underside of the bevel gear 9 Push tooth 16 and a circular rack 17, which is arranged below the axis 13 'of the drive pinion 13 is. With every full 360 rotation of the bevel gear 9 the push tooth 16 engages once with the circular arc toothing 17 'of the rack 17 and pushes it by one tooth " pitch t so that the thrust tooth 16 with each subsequent

A turning 360 rotation again with a subsequent tooth of the

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! Rack 17 engages. The tooth spacing t is approximately equal to the diameter d of the stuffing sleeve 4. In this way, it is ensured that with each full revolution of the Ke gel gear 9 on the thrust tooth 16, the circular arc toothing 17 'and the magazine thrust axis 2 only such a part of the amount of filler from the magazine 3''' pressed into the filler neck 4 can be how this filler neck 4 can accommodate. The length L of the circular arc ^ν - 'toothing 17' corresponds to the length of the maximum advance of the magazine thrust axis 2 to the front mouth 3 ^{MI of} the magazine 3,

IV

so that the magazine thrust axis 2 does not get into the stuffing sleeve 4 and the working stroke of the filling thrust axis 1 in any one Way can hinder.

The device works as follows:

After the plug-in coupling 14 has been swiftly operated with a rotary drive, e.g. with the drive shaft of an electric motor, interconnects η is via the slip clutch 15 and the Axis 13 ', the drive pinion 13 is set in rotation. The drive pinion 13 now in turn drives the bevel gear 9, with the crosshead piston 11 and thus the filling / thrust axis in the rear dead center position of the push rod shown in FIG. 1 10 should be located. In this position, the front end 1 "'of the filling-thrust axle 1 is just before the confluence 3 '"of the magazine 3 into the filler neck 4. At the next

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180 turn of the bevel gear 9 becomes the crosshead piston 11 Moved into its front dead center position, while at the same time the front end 1 '' 'of the filling thrust axis 1 to the outlet opening

V IV

4 of the stuffing sleeve 4 slides down. In this front dead center position the push rod 10 closes the front end 1 '"of the filling push rod 1 flush with the outlet opening 4 of the filling nozzle 4, while at the same time the rear edge 11 ″ of the crosshead piston 11 by a counter to the force of a spring 18 via a slide

'- ·' 19 bolt 18 'to be released is engaged from behind. This will make the Cross-head piston 11 and thus the filling-thrust axis 1 on the backward movement prevented, so that in this position the stuffing sleeve 4 due to its closed outlet opening 4 as Pusher can be used. During the respective filling process, however, the slide 19 is pushed back and thus the bolt 18 'is pressed down against the force of a spring 18 so that the cross-head piston 11 can slide back unhindered.

, _,) In the vicinity of the rear dead center position of the push rod 10 and dts cross-head piston 11, the push tooth 16 comes into engagement with the next tooth 17 ″ of the circular arc toothing 17 'in order to move the rack 17 by one until it reaches out from the circular arc toothing 17' As a result of the advance of the rack 17, the amount of filler in the magazine 3 is also advanced via the magazine thrust axis 2 by this distance, which is equal to the length of the diameter d of the filler neck 4. Ls should be noted at this point that from Reasons of

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graphic clarity in Figures 1-3 of this tooth pitch spacing t is greater than the distance d has been drawn. After the feed corresponding to ^{the distance d B t.}

If the amount of filler has been pressed into the filler neck, the working stroke of the filler thrust axis 1 begins, which when the bevel gear 9 is further rotated via the push rod 10 and the crosshead piston 11 with its front end I ¹ "the advanced part of the filler from the magazine mouth 3 '" cuts off and

pushes out of the opening 4 into the tooth cavity. This process is repeated with each revolution of the bevel gear 9 until the rack 17 has moved into its front dead center position and the magazine 3 is then completely emptied. In this front dead center position of the rack 17, the pusher tooth 16 is in the front dead center position of the push rod 10 in front of the rack 17 so that the rack 17 can be pushed back into its rear dead center position ^{via a pin 17 guided in a longitudinal slot 17 M1.} The emptied magazine 3 can then be replaced by another magazine 3, which has meanwhile been filled by the dental assistant, by a quick movement of the hand.

Before the respective tamping process, the slide 19 is pushed forward so that the bolt IS ^1, under the action of the force of the i'eder I ^, can engage behind the rear quays 11 ″ of the crosshead ^{piston 11 and thus the control 1} gear 9 as well as the

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Drive pinion 13 prevents further rotation. In this operating state slips the slip clutch 15 so that the connected to the plug-in coupling 14, not shown, electrical drive can continue to rotate safely.

To ensure proper functionality of the new device, it is essential to the invention that in the rear dead center position of the push rod 10, the push tooth 16 is out of engagement with the circular arc toothing 17 'and the front end 1'"of the filling-push axis 1 from the upper edge of the mouth 2 of the magazine 3 is then removed at such a distance t, which is equal to the distance difference '^ between the radius r of the central circular path of the pusher tooth 16 and the perpendicular distance a from the axis of rotation 9'"to the secant s of this central circular path

V VI between the point of engagement and the point of engagement 17 and 1 / of the thrust tooth 16 with the circular arc toothing 17 '. This ensures, on the one hand, the front end 1 '"of the filling push shaft 1 until the moment begins the power stroke and the orifice 4 to slide down the filling nozzle 4 when on the magazine thrust axis Z corresponding to the tooth pitch t corresponding amount of the filler a \ is the magazine 3 is pressed into the filler neck 4 and thus the filling process is completed.

In Figures 4-7 and in Figures 8-10, two further Ausfühnmgsformen of the invention are shown in which

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each of the Fu11 thrust axis 1 and the magazine thrust axis 2 through a pneumatic drive arrangement are coupled to one another. The pneumatic drive arrangement consists of at least a manual control valve 20 and two acted upon on both sides Rotary piston 21 and 22, of which the rotary piston 21 with the rear end 1 of the filling / thrust axis 1 and the other rotary piston 22 is firmly connected to the rear end 2 ″ of the magazine thrust axis 2 »The manual control valve 20 is opposite to the To actuate the effect of the force of a spring 23 and is of three sealing rings 20 '"located on the valve stem in an upper one Annular space 20 'and divided into a lower annular space 20 ", which are hermetically separated from one another. In the vicinity of the upper Sealing ring and the lower sealing ring 20 '"is located in

IV V of the valve wall each have a vent 20 and 20, over which the upper and lower annulus 20 'and 20 "are to be vented.

The filling piston 21 and the magazine piston 22 are mutually in the plane of symmetry of the device in piston sleeves 21 'and 22' arranged with equally large diameters.

In the front dead center position VT of the filling piston 21, the front end I ¹ "of the filling thrust axis 1 closes the outlet opening 4 of the filling nozzle 4 flush (see FIGS. 6, 7 and 9), while the same front end 1 '" is in the rear dead center position HT of the j

»9 ί m

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Filling piston 21 in front of the inlet opening 3 ′ ″ of the magazine 3 stands, (see Figures 4, 8 and 10)

A central air supply line 24 is located at the rear end of the device.

In Figs. 4, 6 and 7 this central air supply line is 24 connected via the two feed lines 25 and 25 'to the working side 21 "of the working piston 21 and at the same time via lie Feed line 26, the manual control valve 20 and the further feed line 26 'with the working side 22 "of the magazine piston tied together. Furthermore, there is a piston rod side 21 '' 'of the filling piston 21 at the rear end of the piston sleeve 21' Return line 27, while on the piston rod side 22 '"of the magazine piston 22 at the rear end of the piston sleeve 22' a return line 28 is arranged. The cross-sections of the feed lines 25, 25 'or 26, 26' and the return lines 27, 28 of the filling piston 21 and the magazine piston 22 can be throttled by adjustable control pins 29, whereby the pressure in the individual lines and thus the operating speed of the filling piston 21 and the magazine piston 22 can be controlled.

In Figures 4-7, the central air supply is via the feed line 26, 26 'of the Nagazin piston 22 with the manual control valve 20 and a second feed line 25, 25 'with

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connected to an air piston valve 30, the feed and Sückschub lines 25, 25 ', 27 of the filling piston 21 in the air piston valve 30 and the feed and the '. The push-in line 26, 26 ', 28 of the methanol piston 22 open into the manual control valve 20.

The air piston valve 30 consists of a horizontal in the device arranged Ilohl cylinder, which on its inside by a Partition 30 'in two inner chambers 31, 32 and the one on its outside is divided by four sealing rings 33 into three annular chambers 34,35,36, of which the middle annular chamber 35 is always above the line 25 with the air supply line 24 and via two passage openings 37, 38 with the two inner chambers 31, 32 connected is. On the piston rod side 21 * "and on the working side 21" of the filling piston 21 is located in the filling piston cylinder 21 'One each from the filling piston 21 against the force of a spring 39 ', 40' reversing valve 39, 40 to be opened to reverse the direction of movement of the filling piston 21.

The device shown in Figures 4-7 works as follows:

In the working phase of FIG. 4, the filling piston 21 rests against the reversing valve 40, while the air piston valve 30 is in its front position and the manual control valve 20 c'by the spring 23 be held in a raised position. In this work phase, the air supply line 24 flows over the feed line

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25 and over the middle annular chamber 35 of the air piston valve Air through the opening 37 into the upper inner garnner 31 and through the air passage opening 33 into the lower inner chamber 32. Since the Reversing valve 40 is opened by the filling piston 21 against the action of the force of the spring 40 ', the upper inner chamber 31 vented via lines 41, 41 *. Since at the same time in the lower inner chamber 32 the full air pressure on the surface of the Partition 30 'acts, even if the device is shaken the air piston valve 30 is held immovably in the position shown in FIG. At the same time, the one on the piston rod side 21 "'lying interior of the piston liner 21' over the Return line 27, via the annular chamber 36 of the air piston valve 30 and vented via the vent line 27 '. Because of This constellation is acted upon on its working side 21 ″ filling piston 21 in the direction of the arrow pushed onto the reversing valve 39. During the entire working stroke of the filling piston 21, the magazine piston 22 is on its Working side 22 "over the feed line 26, the annulus 20" of the manual control valve 20 and via the line 26 * of air acted upon, while the on the piston rod side 22 '"of the Magazine piston 22 located interior of the piston sleeve 22 'via the line 28, the annular space 20' of the manual control valve

IV and the vent opening 20 in the wall of the manual control valve 20 is vented. As a result, the Magazine piston 22, the magazine Schubachst 2 in the direction of the

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The filler neck 4 is advanced so that a corresponding amount of the filler in the magazine 3 enters the filler neck 4 pressed, cut off from the filling-thrust axis 1 and off |

V ί

the outlet opening 4 of the filler neck 4 in the relevant Tooth cavity is promoted.

In this working phase, the filling piston 21 has that shown in FIG. 6 Assumed the working position and the reversing valve 39

o ■ ϊ

actuated. This has the consequence that now the lower interior chamber f 32 of the air piston valve 30 via the connecting line 42, 42 * associated with the annulus 20 'of the manual control valve 20 \

IV

and is vented via the vent opening 20 in the wall of the hand control valve 20th Since at the same time the reversing valve 40 is closed on the opposite side, the middle ring is via the air supply 24, via the feed line 25 _; chamber 35, air ν with full pressure through the air passage opening 'is pressed into the upper interior chamber 31 37, whereby the partition wall 30' is fully charged 'of the air piston valve 30 on this side and the air piston valve is pushed into the position shown in Fig. 6 Location 30. In this position of the Luftko ^> enventiles 30, the interior of the piston liner 21 * located on the working side 21 ″ of the air piston valve 21 is vented via the feed line 25 ', the upper annular chamber 34 and the vent line 43, while at the same time the central air supply 24 is vented via the Feed line 25, the middle annular chamber 35 and

7345801 ² Ou9.76

Hi 161a, b / 72 - 2? -, /:.27. Sept 1974

the return line 27 acts with full strength on the piston rod side 21 "'of the filling piston 21. As a result, the filling piston reverses 21 reverses its direction of movement in the direction of the arrow and now moves again to the reversing valve 40 to. During these continuously repeating, oscillating movements of the filling piston 21, the magazine piston 22 always acted upon by air in the manner described above on its working side 22 ″ and on its piston rod side 22 "'. Accordingly, the corresponding amount of filler is always before each starting working stroke of the filling-thrust axis 1 pressed out of the magazine 3 into the filler neck 4. The constantly oscillating movement of the filling piston 21 is always the reversing valve 39 and the reversing valve 40 are actuated in an alternating sequence, whereby the air piston valve 30 is automatically activated comes alternately in the position of FIG. 4 and in the position of FIG. 6. In this way, the filling piston O 21 small portions of the filler in the magazine 3 are pressed into the relevant tooth cavity in rapid succession.

To use the device not only as a filling instrument, but also at any time To be able to use it as a tamping instrument, the filling process can be interrupted immediately by depressing the manual control valve 20. This working phase of the device is shown in FIG. By pressing down the manual control valve 20 against the The annular space 20 ″ comes into contact with the force of the spring 23

7345801 09.09.76

Hi 161a, b / 72 ■ -? .8 - 'y Sept. 27, 1974

the vent opening 20 and is vented. At the same time, the annular space 20 'of the manual control valve a is closed by the outer sealing ring 20'"in front of the ventilation opening 20. This has the consequence that the air piston valve 30 is now subjected to constant pressure on both sides of its partition 30 'in the two inner chambers 31 and evenly On the one hand, the air reaches the two inner chambers 31 and 32 via the central air supply 24, the feed line 25 and the central annular chamber 35 as well as through the two air passage openings 37 and 38. The air cannot escape from the inner chamber 31 because the reversing valve 40. The air cannot escape from the inner chamber 32 of the air piston valve 30, since this inner chamber 32 is now connected to the annular space 20 'of the manual control valve 20 via the connecting lines 42, 42' when the reversing valve 39 is open separated from the vent opening 20 in the valve wall and is due to the ring groove 20 'in this of the manual control valve 20 opening feed line 26 ur.ter effect of the pressure of the central air supply 24, Since the return line 28 of the magazine piston 22 also opens into the finger space 20 * of the manual control valve 20, the magazine piston 22 is pushed back into the position shown in FIG. 7, Is; "space 20 of the magazine piston via the Vorschubleitxm ^ 2f with the Rinp" of the manual control valve 2 ^{'1 are} connected at the same time as the working side 22nd This annulus 20 "des

7345801 "next ^q nQ" 7R

Hi 161a, b / 72. 29 -. : ": '".''.". * 2%. Sept. 1974 ι.

Manual control valve 20 is vented via the vent opening 20. The piston rod side 21 "'of the filling piston 21 is also vented. This venting takes place via the return line 27, the ring cam 36 of the air piston valve 30 and via the vent line 27 '. At the same time, the filling piston 21 is on its working side 21 ″ from the central air supply 24 via the feed line 25, the middle ring karamer 35 of the air piston valve 30 and acted upon via the further feed line 25 ' and held in this way in the position shown in FIG. In this position, the front end 1 '"of the filling

V
Thrust axis 1 the Ausittsöffno.ng 4 of the filler neck 4 flush

IV
so that the stuffing sleeve 4 can be used as a closed tamper for condensing the amount of filler in the tooth cavity. To continue the filling process, the manual control valve 20 only needs to be released, whereby the force of the spring 23 returns it to the positions shown in FIGS. 4 and 6 and the filling process can be continued at undiminished speed in the manner described above.

In Figures 8-10 is a simplified embodiment of the the device of Figures 4-7 described above. In addition to the manual control valve 20, this device has a manually controlled one Magazine piston reverse valve 44 but does not have an air piston valve 30. In this case the central air supply is 24

734580? ° '

09/09/76

Hi 161a, b / 72-30 ·, Sept. 21, 1974

via the central feed line 26 with the magazine piston UiTi reversing valve 44 connected. This magazine piston reversing valve 44 is designed as a rotary piston valve in the illustrated case, which has two valve chambers 44 'and 44 "and two ventilation openings 44 '"and 44. Opens into the valve chamber 44 * the back chub line 28 of the iiagazinkolbens 22 and is during the filling process always vented via the vent opening 44 "'. The central feed line 2.6 and a connecting line 45 to the manual control valve 30 open during the filling process the filling / thrust axis 1 always enters the valve chamber 44 ″.

The manual control valve 20 is in turn contrary to the effect of Actuate force of the spring 23 and has three sealing rings 20 '"on the valve stem, which two annular spaces 20' and 20" are airtight separate from each other. In the vicinity of the upper sealing ring is the vent opening 20 and in the vicinity of the lower sealing ring W the ventilation opening 20 is provided. The feed line 25 of the filling piston 21 and the feed line open into the annular space 20 ″ 26 * of the magazine piston 22. The annulus 20 ' of the manual control valve 20 is connected to the return line 27 of the filling piston 21.

This device works as follows:

) The manual control valve 20 and the magazine piston reversing valve 44 \

each have two switch positions I and II, which are in the f

- 31 - P.

7345801 09.09.76

Hi 161a, b / 72 - 51 -: ":": Sept. 27, 1974

individual figures are in different positions. In FIG. 8, the magazine piston reversing valve 44 and the manual control valve 20 are each in the correct position I. Annular space 20 ″ of the manual control valve 20 is ventilated. Consequently, * the working side 22 acts via the feed line 26 "of! Lagazinkolbens 22 and rbeitsseite via the feed line 25, the ^A 21" filling piston 21st At the same time, the piston rod side 22 '"of the magazine piston 22 is vented via the return line 28, the valve karamer 44 * and the vent opening 44'". Likewise, the piston rod side 21 '''of the magazine piston 21 via the return line 27, the upper annular space 20 * and the

IV
Vent 20 vented. In this working phase of FIG. 8, the filling piston 21 and the magazine piston 22 move in the indicated arrow directions, as a result of which the magazine thrust axis 2 pushes filling material from the magazine 3 into the filler neck and from there it is carried along by the filling thrust axis 1 and into the corresponding tooth cavity is pressed.

In order to reverse the direction of movement of the filling piston 21 at the end of the working movement, the manual control valve 20 must be depressed into the second switching position II shown in FIG. 9, while the magazine piston reversing valve 44 is in its ■. ·: ..: · ■ ':;: - 32 -

7345801 09.09.76

ill 161a, b / 72 - 32 -. . 'Sept. 27, 1974,

: switch position, I remains. While the magazine piston 22 continues to be essentially 'Cr', the feed line 26 *, via the annular space 20 ^{e of} the end control valve 20, via the connecting line 45, the valve canisters 44 "and the central feed line 26 from the central air supply 24 is acted upon, the lower m 20 "of the land control valve 20 is now via the fin ventilation

V
öffnuno 20 vented, whereby the feed line 25 of the filling piston 21 is vented. At the same time, the rucksack line 27 is connected to the connecting line 45 "of the valve chamber 44" and the central feed line 26 via the annular space 20 'separated ^{from the ventilation opening 20 "1", so that the filling piston 21 moves in the direction of the arrow shown in FIG} By alternately depressing and releasing the manual control valve 20 f, the filling piston 21 alternately moves into the positions shown in FIGS

Corresponds to the filling process. If the manual control valve is held down in the switching position II shown in FIG. 9, the filling / thrust axis 1 leads to its foremost position, whereby its front end I ¹ "closes the outlet opening 4 of the filling nozzle 4 flush and the amount of filler in the tooth cavity can be condensed.

In order to be able to replace the magazine 3 after it has been emptied, the magazine thrust axis 2 and thus the magazine piston 22

73458ofo9.09.76

Ί lhla, b / 7? - 33 -; Sept. 27, 1974 ^u

will. This is done by the magazine piston reversing valve 44 into the switching position indicated in FIG. 10 IT. is switched, with the I land control valve 20 in the switch position I, but also safely in the switch position II can be pressed. In the switching position II of the magazine piston reversing valve 44 iii Fig. 10, the central Air supply 24 is connected via the central feed line 26 to the valve chamber 44 ', which is now from the vent opening

voltage 44 '"is separated and via the return line 28 of the Magazine piston 22 acts on the piston rod side 22 '". At the same time, the working side 22 ″ of the magazine piston 22 is vented via the feed line 26 ′. In the switching position I of the island control valve (see FIG. 1.0) via the lower annular space 20 ", the connecting line 45, the valve chamber 44" and the Vent 44. In switching position II of the manual control valve, as shown in FIG. 9, the feed line 26 'of the filling piston 22 would be via the annular chamber 20' of the manual control valve ntiIes are connected to the connecting line 45 and then likewise via the valve chamber 44 ″ and the ventilation opening 44 are vented,

As soon as the magazine piston 22 is in its position shown in Fig. Iq is moved back, the magazine 3 can be replaced by a new filled magazine 3 in the manner described above. It is essential that the length of the magazine piston 22 should be so

73458Dfo9.09.76

Hi 161a, b / 72

• t · I · * · Φ · I «If

9/27/19 //.

it is chosen that the foremost end 2 ^{IM of} the magazine thrust axis 2 is so far removed from the entry opening into the magazine 3 that the magazine 3 can be pushed back against the force of the spring 5 with the sliding block 6 without again with the front end 2 ¹ "of the magazine thrust axis 2 to come into engagement.

It goes without saying that the illustrated and described embodiments are only intended as three practical examples of implementation of the idea of innovation: should be considered, within which various modifications are possible.

Protection claims

Claims (1)

Hi 161a, b / 72 ^{18 May 1976} η Protection claims 1. Device for filling tooth cavities with fillers, for example with amalgam, which has a filling nozzle and an in a guide channel to be moved back and forth into the filler neck has a transitional filling thrust axis as well as a magazine which is arranged transversely to the filling nozzle and opens into it, from the magazine thrust axis guided in a second guide channel at the beginning of the near the magazine junction beginning and ending at the exit of the filler neck working stroke of the filler thrust axis a part of the filler in to press the filler neck, characterized in that the device is a removable magazine Interchangeable magazine (4) and its filling thrust axis (1) and its magazine thrust axis (2) by a single, common and their movements to each other coordinating drive are coupled to each other, either from a mechanical transmission or a pneumatic drive arrangement. Hi 161a, b / 72 " ^A " ¹⁸ x ^{times i976} 2. Apparatus according to claim 1, characterized in that the mechanical transmission from einam the filling-thrust axis (1) driving, with crank (9), push rod (10) and cross-head piston (11) provided slider crank mechanism and from one the magazine-Schubacbse via the crank (9) (2) driving rack and pinion gear (12) connected to the latter (2), 3. Apparatus according to claim 2, characterized in that the push rod (10) with its ^{cross-head piston (11) guided in a bushing (II 1} ) is fastened centrally at the rear end (1) of the filling-push axis (1) and the crank (9 ) is designed as a flat bevel gear protruding beyond the track diameter (9 ¹ ) of the push rod ^{pin (9 M} ). 4. Device according to claims 2 and 3, characterized in that the designed as a bevel gear crank (9) communicates with a conical drive pinion (13) engaged, the axis (13 ¹⁾ is aligned to the cross-head piston axis and to the filling push shaft (1) In the rear end (13 ") of the axis (13 ') of the drive pinion (13) protruding from the device, a known plug-in coupling (14) and a slip clutch (15) are arranged between the latter (14) and the drive pinion (13) . Hi 161a, b / 72 " ³ " ¹⁸ ' ^{May 1976} 5. Apparatus according to claims 2 to 4, characterized in that the axis of rotation (9 "') of the crank (9) lies in the plane of symmetry of the device and on the On the underside of the crank (9) a circular segment-like pusher tooth (16) is arranged through which every full 360 rotation the crank (9) which is provided with a circular arc toothing (17 *), circular rack (17) is to be pushed forward by a tenth pitch (t). 6. Apparatus according to claims 2 bic 5, characterized in that in the rear dead center position of the push rod (10J the push tooth (16) with the circular arc toothing (17 ') is out of engagement and the front end (1 ^MI ) of the filling thrust axis (1) is then removed from the upper edge of the mouth (3) of the magazine (3) at a distance (t) which is at least equal to the difference in distance between the radius (r) of the central circular path of the pusher tooth (16) and the perpendicular distance (a ) from the axis of rotation (9 ¹¹¹ ) to the secant (s) of this central circular path between the point of engagement and the point of engagement (17 and 17) of the pusher tooth (16) with the circular arc toothing (17 ¹ ). 7345801 09.09.76 May 18, 1976 7. Apparatus according to claims 2 to 6, characterized in that in the front dead center position of the thrust axis (10) the front end (I ¹¹¹ ) of the filling thrust axis (1) flush with the outlet opening (4) of the filling nozzle (4) and closes at the same time the rear edge (II ¹ ) of the crosshead piston (11) is engaged from behind by a bolt (18 ') which is to be released against the force of a spring (18) via a slide (19), 8. Apparatus according to claims 2 to 7, characterized that in the front dead center position of the push rod (10) and the rack (17) the push tooth (16) lies in front of the toothed rack (17) and the latter (17) over a pin guided in a longitudinal housing slot (17 '") (17) can be pushed back into its rear dead center position. 9. Apparatus according to claim 1, characterized in that the pneumatic drive arrangement consists of at least one manual control valve (20) and two rotary pistons (21, 22) acted upon on both sides, from those of the one (21) with the rear end (1) of the filling thrust axis (1) and the other (22) is firmly connected to the rear end (2 ") of the magazine thrust axis (2). 7345801 09.09.76 Hi 161a, b / 72 - 5 - May 18, 1976 10. Apparatus according to claim 9, characterized in that the against the action of the force of a spring (23) to be operated manual control valve (20) of three sealing rings located on the valve stem (2O ¹ ") in two airtight separate annular spaces (20 ') u. 20 ") is divided and near the upper (20 ') and the lower sealing ring (20") in the valve wall each have a vent opening (20, 20) through which the upper (20 ¹ ) and the lower Annular space (20 ") are to be vented. 11. Apparatus according to claims 9 and 10, characterized in that the filling piston (21) and the Magazine pistons (22) in the plane of symmetry of the device with one another in piston sleeves (21 ', 22') with the same size Diameters are arranged. 12. Apparatus according to claims 9 to 11, characterized in that in the front dead center position (VT) of the filling piston (21) the front end (I ¹ ") of the filling thrust axis (1) flush with the outlet opening (4) of the filling nozzle ( 4) and is in the rear dead center position (HT) of the filling piston (21) in front of the inlet opening (3 "') of the magazine (3). 7345801 09.0976 13. Device according to claims 9 to 12, characterized in that that at the rear end of the device there is a known central air supply line (24) located, ^ ie each via a feed line (25, 25 ', 26, 26') with the working side (21 ", 22") and each with a return line (27, 28) connected to the piston rod side (21 '", 22"') of the filling piston (21) and the magazine piston (22) is. (see Figures 4 and 5) 14. Apparatus according to claims 9 to 13, characterized in that the cross sections of the feed lines (25, 25 ', 26, 26') of the back thrust lines (27, 28) of the filling piston (21) and the magazine piston (22) can be throttled by adjustable control pins (29). (see figures 4 and 5) 15. Apparatus according to claims 9 to 14, characterized in that the central air supply line (24) via a feed line (26) with the manual control valve (20) and is connected to an air piston valve (30) via a second feed line (25, 25 '), the feed and the return line (25, 25 ', 27) of the filling piston (21) into the air piston valve (30) and the feed and return lines (26, 26 ', 28) of the magazine (22) in the manual control valve (20) open, (see Figures 4 and 5) 7345801 09.09.76 Lbla, b / 72 "'' ¹⁸ * ^{May 1976} Λ 16. Apparatus according to claim 15, characterized in that that the air piston valve '30) consists of a There is a hollow cylinder arranged horizontally in the device, which is surrounded by a partition (30 ') on its inside with inner chambers (31, 32) and divided on its outside by four sealing rings (33) into three annular chambers (34, 35, 36) is, of which the middle annular chamber (35) always with the air supply line (24) and two air passage openings (37, 38) is connected to the two inner chambers (31, 32). (see Figures 4 and 5) 17. Apparatus according to claims 9 to 16, characterized in that on the piston rod side (21 * ") and on the working side (21 ^H ) of the filling piston cylinder (21 ') each one of the filling piston (21) against the force of a spring (39, 40 ') to be opened reversing valve (39, 40) for reversing the direction of movement of the filling piston (21) is located. 7345801 o "9.0976 Hi 161a, b / 72 ^{r 8} ", ^{May 18 , 1976} 18. Apparatus according to claim 17, characterized in that the reversing valve (40) on the working side (21 ") of the filling piston cylinder (21 ^f ) when acted upon by the filling piston (21) this working side (21") facing the inner chamber (31) of the Air piston valve (30) for venting via a vent line (41, 41 ') releases and when the filling piston (21) is lifted this inner chamber (31) closes in front of this vent line (41, 41'), while at the same time in this position the air piston valve (30) The feed line (25 *) of the filling piston (21) is ventilated via its middle annular chamber (35) and the return line (27) of the filling piston is vented via a vent line (27 *) via its rear annular chamber (36). (see Fig. 4) 7345801 08/09/76 Hi 161a, b / 72 " ⁹ " ¹⁸ ' ^{May 1976} 19. Apparatus according to claim 17, characterized in that the reversing valve (39) on the piston rod side (21 '") of the Füllkclbenzylinders (21') when acted upon by the filling piston (21) facing away from the working side (21") of the inner chamber (32 ) of the air piston valve (30) via a connecting line (42, 42 ') leading to the manual control valve (20) for venting via the upper vent opening (20) of the manual control valve (20) and this inner chamber (32) is released when the filling piston (21) is lifted off a vent closes, while at the same time the air piston valve (30) changes its position and in this position the return line (27) of the filling piston (21) is ventilated via the middle annular chamber (35) of the air piston valve (30) and via the feed line (25) and the Feed line (25 ¹ ) of the filling piston (21) is vented via the front annular chamber (34) and a vent line (43). (see Fig. 6) - 10 - 7345801 09.09.76 Hi 161a, b / 72 "^ ⁰ " ¹⁸ · ^{Ma: L 1976} / Q 20. Apparatus according to claims 15 to 19, characterized in that when the manual control valve (20) is pressed down, the filling piston (21) on reaching the reversing valve (39) on the piston rod side (21 '") of the filling piston cylinder (21 ¹ ) is in this position is to be held and the inner chamber (32) of the air piston valve (30) facing away from the working side (21 ") of the filling piston (21) via the connecting line (42, 42 ') with the feed line (26) of the Magazine piston (22) is connected, while at the same time the return line (28) of the magazine piston (22) is ventilated via the feed line (26) and the feed line (26 *) of the magazine piston (22) is ventilated via the lower vent opening (20) of the manual control valve (20) is vented. (see Fig. 7) 21. Apparatus according to claims 9 to 14, characterized in that the central air supply line (24) for reversing the direction of movement of the magazine piston (22) with a manually operated magazine piston reversing valve (44) is connected, in which the return line (28) of the magazine piston (22) and a connecting line (45) to Manual control valve (20) open onto which, in turn, the feed line (26 *) of the magazine piston (22) and the feed unit the KückschubK- i lung (25 and 27) of the filling piston (21) are connected. (see Figures 8, 9 and 10) Hi 161a, b / 72 " ^U " ¹⁸ ' ^{times 1976} 22. Apparatus according to claim 21, characterized in that in the vicinity of the inlet opening of the Return line (28) of the magazine piston (22) and the opening the connecting line (45) each have a vent opening (44 '", 44) in the two possible switching positions reversible magazine piston reversing valve (44) are provided. (see Figs. 8, 9 and 10) 23. Device according to claims 21 and 22, characterized in that in the first switching position (I) of the magazine piston Urakchrventils (44) the connecting line (45) to the manual control valve (20) is ventilated, while at the same time the return line (28) of the The magazine piston (22) ^{is vented via a vent opening (44 MI} ) and that in the second switching position of the magazine piston reversing valve (44) the return line (28) of the magazine piston (22) is ventilated, while at the same time the connecting line (45) to the manual control valve ( 20) is vented via a further vent opening (44). (see Figs. 8 and 9) 7345801 09.09.76 24. Apparatus according to claims 21 to 23, characterized in that the manual control valve (20) also has two switching positions (I, II), the connecting line (25) between the magazine piston reversing valve (44) and the in each of these two switching positions The manual control valve (20) is always connected to the feed line (26 ¹ ) of the magazine piston (22) (see Figs. 8 and 9) 25. Apparatus according to claim 24, characterized in that in the first switching position (I) of the Manual control valve (20) and in the second switching position (II) of the magazine piston reversing valve (44) the return line (27) of the filling piston (21) via the one located in the upper annular space (20 ') Vent opening (20) is vented, while at the same time via the connecting line (45) and the lower annular space (20 ") the feed lines (25, 26 ') of the filling piston (21) and the magazine piston (22) are ventilated. (see Fig. 10) 73458oVoYo9.76 Hi 161a, b / 72 " ¹³ " ¹⁸ ' ^{times 1976} _{/ r} - 26. Apparatus according to claim 24, characterized in that in the second switching position (II) of the manual control valve (20) with simultaneous first switching position (I) of the magazine piston reversing valve (44) the feed line (25) of the filling piston (21) via the in The vent opening (20) located in the lower annular space (20 ^M ) of the manual control valve (20) is vented, while at the same time the return line (27) of the filling piston (21) via the connecting line (45) and the upper annular space (20 *) of the manual control valve (20) ) and the feed line (26 ') of the magazine piston (22) are ventilated. (see Fig. 9) 27. Apparatus according to one or more of claims 1 to 26, characterized in that the magazine (3) consists of a sleeve with conical ends (3 ¹ , 3 ") which extends between the filler neck (4) and the magazine thrust axis ( 2) is to be inserted into appropriately shaped mating surfaces. 28. Apparatus according to claim 27, characterized in that the magazine (3) with its end (3 ¹ ) facing away from the filler neck (4) guided on a counter to the force of a spring (5) slidably and coaxially to the magazine thrust axis (2) The sliding block (6) is in contact. - 14 - 7345801 09.09.76 G 73 45 «01.2 .. ιοΜ · ioit ... ,, _η ν ζ- ,, - 14 - 18 May 1976 Hi 161a, b / 72 29. Apparatus according to one or more of claims 1 to 28, characterized in that the filler neck (4) consists of a ^{locking sleeve firmly connected to the end (l ") of the guide channel (I 1} ) of the IUIl thrust axis (1), which is known per se (4 ') and one at its other end (4 ") in a manner known ^{per se with a screw connection or a bayonet coupling (4 MI} ) to be detachably fastened stuffing sleeve (4), the working end of which is a cylindrical, conical, spherical or other Has shape. 30. Apparatus according to one or more of claims 1 to 29, characterized in that the filling-thrust axis (1) and the magazine-thrust axis (2) consist of a flexible, piston-less wire made of corrosion-resistant metal or of plastic, for example of tetrafluoroethylene, and are guided over most of their length in the guide channels (I ¹ , 2 ') or in the magazine (3). 7345801 09.09.76