DE1603900A1 - Pneumatic device for driving fastening bolts and the like. - Google Patents

Description

1 §03900

Dou / Ul - 2230 Munich-Pullach, December 28th, 1966

G-ASTON E. MlRBAIX LIMITED, Devonshire House, Vicarage Crescent, London S.W. 11, England

Pneumatic device for driving of fastening bolts and the like.

The invention relates to pneumatically operated Stud guns or devices used for driving of fastening bolts and the like. Serve and are often called "pneumatic pistols" or "air pistols" (which, however, should not be confused with the air pistol used as a weapon or with an air rifle to be allowed to). In the broad sense of the word represent such Devices are blow molding tools and can be used more appropriately Adaptation to be used as a hammer, riveting machine and the like «

The aim of the invention is to create a robust and economical tool of this type that saves space for a given force and length of the working stroke than the known tools, the speed of the working member being increased compared to the known can be and a substantial number of the working members Can be produced from synthetic or plastic material is. .

A 109809/0021

A major factor in such tools is that Presence of a large opening cross-section that opens very quickly to the working air. Various valve arrangements are proposed for this purpose been. The invention creates simple and effective ones Valve arrangements and a construction in which the mass and consequently the inertia of the working member is kept small, with a simple and effective Control for the required return stroke guaranteed, is.

For air pistols of the type according to the invention was obtained a large opening to suddenly open the valve to allow access to the one required for the working stroke Air proposed an intake valve, which in and of itself includes the whole cylinder head, the upper edge of the cylinder is seated. Various return stroke means have been used, starting with return springs to differential piston areas. The known air pistols have a considerable overall length so that they do the required Can do work, with a further disadvantage of this training the inevitable greater weight was. Most known tools of this type are held in the hand, so that the weight as such is a crucial factor.

A well known compressed air operated pistol for driving in fastening bolts and the like. Has a double-acting working piston in a master cylinder with open ends on · One provided at each end of the cylinder The main valve opens and practically closes the

entire

10SS03 / 00 2

entire cross-sectional area of the cylinder while through one under your influence of a manually released trigger standing, valve-controlled line the pressure-different forces acting on the main valves can be changed, so that for the work hub the whole area of work piston abruptly supplied pressure and one main valve operated and at the same time the other main valve to Ventilation of the space below the piston opened and the other valve closed during the return stroke, the one below Air is supplied to the space located above the piston and the space above the piston is vented to the atmosphere. In one embodiment, the first is Main valve is a circular piston valve and in other embodiments, both valves act as Differential Cross Section Pistons. -.

• Examples of the prior art 1 · η reference on the above-mentioned tools are from the U.S. patent 2 979 725 and the other patents cited therein as well as from the corresponding British patent specification 929 341 can be seen.

Another achievable by the present invention The advantage in at least one example is that certain masses, namely double piston valve elements in opposite directions when the tool is operated Move directions and seek, due to inertia, to compensate for their inertia effects, and it has been found that a certain degree of equilibrium can thereby be achieved, so that the recoil felt by the operator is reduced will.

109 80Ö / 00 21

Another advantage that can be achieved in some embodiments according to the invention is that one piston valve element opens before the other, so that .the. Venting achieved below the working piston in a phase prior to the working stroke so that the working stroke, which is not obstructed by air trapped below the working piston, is faster. Another advantage is that no spring force is required for the return stroke. According to the invention one relies on the air pressure differential effects. In addition, according to the invention (as shown on the basis of an exemplary embodiment) is provided that the vent below the working piston is phased before the working pressure takes effect takes place and thus further contributes to the rapid effect. By properly arranging the work phases, a certain degree of air suspension can in fact end up of the working stroke can be achieved, so that the rebound can accelerate the execution of a complete operation.

The aim of the invention is to obtain such improvements as well as other advantages that will be apparent to those skilled in the art the following description illuminate »

Accordingly, the ultimate aim of the invention is to provide an air gun tool of the type mentioned above, in which the two ends of a double-acting working piston in a cylinder with axially moving piston valves work together, the first of which from the cylinder from duxch the pressure difference is opened, so that a Side of the piston pressurized with air for the working stroke

while the second is from the cylinder for venting the other side of the piston due to the pressure difference is opened, whereupon the two valves, each closed be so that the return stroke by reversing the on it acting pressure difference can take place, whereby- a Control valve for reversing the pressure differences. And a Another valve for venting the working air are provided so that the piston is no longer acted upon by the air and the latter valve can be reversed by the pressure difference.

Thus, the air gun tool of the above-mentioned type according to the invention contains a double-acting working piston in a cylinder with open ends and, a first and a second piston valve, each in further cylinder are movable, which in turn, the ends of the Cylinder with the open ends under the action of the reversibly exerted air pressure close and open. In the case of the tool according to the invention, the working piston takes up a position in which a valve is controlled, which in its open position allows the air, to act on the working piston for its return stroke.

In such a tool, a piston valve in its movement and in one of its function as Master cylinder valve separate puncture the vent control one or the other side of the working piston.

In the case of the tool according to the invention as described above Kind of the first piston valve carries a further pressure operated one Valve ^ that controls the venting on one side of the working piston.

106809/00

With this tool, the features above can be used one or both of the piston valves be provided with openings and passages in such a way that the cylinder, in which the valve slides, vented through a through opening provided in its wall can be.

In the tool according to the invention, these are the piston valves actuating pressure differential forces controlled by a manually operated two-way valve, which alternately Compressed air is supplied to close the two piston valves or these are vented to open the valves.

According to a common or combined feature of the present invention, the working piston operates as a double-acting piston in a working cylinder which itself has open ends. This cylinder can be attached to his Upper end through a first piston valve that reciprocates in an upper valve cylinder, and on its lower end is closed by a second piston valve that in a lower valve cylinder goes back and forth, these valves preferably sitting at the respective ends of the working cylinder and can be opened and closed by the pressure of the supplied air. The working cylinder has a rod, which preferably forms the actual so-called spindle of the tool and slides through the second valve. A manually controlled valve regulates the air supply so that the first valve is used for the working stroke open to the supply of air above the working piston and the second valve for venting the room

below

1 09809 / ÖÖ21

open below the working piston and the space above of the working piston is in turn vented for the return stroke and air is supplied below the working piston.

The movement of the working piston itself controls a valve for the working phase of the cyclical work cycle and that first piston valve carries another valve, which (for Venting) works in the return stroke phase.

Another inventive feature consists in a particularly expedient arrangement of a valve controlled by the trigger or trigger, which is provided in one of the following embodiments. This arrangement is connected to a so-called "butt firing device ¹¹ , by which the air pistol (triggered by the operator, with the shooting device being overridden) is actuated as soon as the tool is mounted on a workpiece, so that the actuation is automatically interrupted when the tool is removed from the workpiece is eliminated. the arrangement is thereby such that either the trigger control or the surge control may be used. another important feature is also the presence of a valve which, depending --nSch 4-position of the working piston directly operated and allowed _s that the The air space below this piston can be vented prior to the controlled supply of working pressure to this piston so that no substantial pneumatic obstruction of the working stroke can take place ermagnet or a locking arrangement consisting of a ball and spring - these devices are commercially available

on 9/0021

to fix the working piston in its outer Dead division for a purpose based on the second . Implementation of the exemplary embodiments described below comes into play.

The compressed air shooting device according to the invention for driving in fastening bolts and the like also has a housing with a master cylinder with open ends and a double-acting Hauptkolfaen, which is actuated in the master cylinder to carry out the work required for driving in the fastening bolt and the like Cylinder head is provided with a cylindrical extension, extending from the housing, which supports it coaxially in the interior of the main sylin, with the diameter of the shoulder is smaller than 3en © 3? ä®B cylinder land a - Haaptv © Kt ± oil cylinder in the 0aliäia © <fd®a Aasata coaxially "surrounds nnü. a diameter seed, & ®t g ^ Öß © ^ is than that of the main cylinder. A tea ringfÖ2iiig @ s main valve member is in the main valve cylinder and arranged on a flat surface , the end of the main cylinder closes in an outer opening ₉ while in the other outer position it limits the opening to the main cylinder, the transverse baraicli of which for the air passage is so large that air is unhid @ rt towards the main cylinder and away from it BtT ¹ OmQm. wherein © ine is provided with a valved conduit kana, so that the main valve member open Desa sum -Mid · Close air pressures required is exposed _ö In this regard, the invention stiaelh. versohiedeas have additional features that are valid for the main feature specified in the patents.

she 109809 / 00-21

ORIGINAL INSPECTED

The invention will now be explained with reference to the "accompanying drawings described in more detail with reference to two exemplary embodiments; show in it:

Figure 1 is a sectional view of a hand-held one . air pistol in its static state; .

Fig, 2 is a sectional view along the line H-II of Fig. 1;

FIG. 3 is a sectional view of that shown in FIG Device or its components located at the end of the working stroke; '

Fig. 4 one of the. similar view shown in FIG an air gun in its static state according to a modification of the first embodiment;

FIG. 5 is a view of the air gun shown in FIG at the end of the working stroke;

Figure 6 is a view of that shown in Figures 4 and 5 Air pistol, the working piston of which is at the Eüdkhub is in an intermediate position;

Fig. 7 is a sectional view taken along line XX of Fig. 4; V;

Figures 8, 9 and 10 are a similar view of a second embodiment a (simplified) inventive »External construction of the air pistol;

Fig.

1OS8OÖ / Ö021

Fig. 11 is a sectional view along the line Y-Y;

Figure 12 is a partial sectional view of a modified one

. Construction of the working piston and the upper main valve element in the phase state of 10, specifically during the return stroke; and

13, 14 and 15 are a view of a modification of FIG in fig. 8-11 according to the work phases.

In general, those obtained in the examples of FIG 7 and 7 have the same reference numerals and are readily identifiable, whereas FIGS. 8-11 are new Reference Numbers Received Inasmuch as Figures 13, 14 and 15 show identical parts, these have the same reference numbers as Figures 8-11.

In the illustrated examples, no parts are shown with the magazine or the like for the feed the fastening bolts and the like are connected, this magazine feed being often used as a secondary part for such Shooting tools is supplied.

The air gun shown in Figures 1-7 has a hollow body 1 with a hollow pistol grip 2 consisting of one piece with it, which is connected to the compressed air source Can be connected in a known manner · The hollow body or the housing 1 and the handle 2 can be made from one Light metal casting or compression molded synthetic Resin made · The housing 1 has a generally cylindrical inner shape and has in a

common

109809/0021

■ common axis an upper cylindrical © bore 3 a © cylindrical main bore 4- «Di® bore""2 -has a slightly larger diameter than.diö bore 4o Ia d © r bore 4 is γόη three radially projecting" legs-öä © r - .. boars 5A _$ Having the Hauptarbeitssyiindsr 5 "of the inner hall) of the bore 4 eing © schlösg; ea tsnd.troa arranged in their propriety wheel is thus a ItafthohlrauiB β bilä © t _v in the hollow Xnaenraua-d @ s * - "d-riffes 2. ends 6 is sent by the handle iaaunterbroehen ait .. Dl © leg §jt siad-" sai ßeliäias® 1 thus also attaches the 2ylind @ r 5 _Ö ■ '".-" ■ " - .. ■ "

Sealing ring 7 &. B, nt _a Aa ■ di @ g © m. © is © 3 £ o * lb® & rod in the form of d @ r Spindil 8 "** '■ & · © £ Yör-ric & inang fc © sxially arranged üad" ^ © mit-tele stia © r fistle 9 fastened ^ «" s © various © Stangsn dkm.® more- @ .new @ © te © lfea Binde Weittre Sondeasaerkmäle of this. -stange are aias followerzid © a description '© obviously «, ° - _:. "

(xleitbar in delta Bohruag 3 \ vm & smaller at -.. diameter -in represents bore 4 is das'Aäsatagkolbenventil _r 10 arranged in the © £ ed Hauptventilgl SaXStSlIt be ₅ which is also made 'of plastic Jsann and in te bore ■ 3. sealed (with larger diameter), by means -one sealing ring 1OA and in the bore 4 (smaller diameter) by dan seal ring 1Ob is _β "'A seal ring TQC on the * underside of the-Tentils" 1 * 0 is sealingly on upper- . .Hand-of-cylinder 5 "wmmn the valve 10 is located below {d _o h _e. closed", is) <> the main valve 10 has e-lne © stepped edge in what TQD ₉ ©

i0SÖ09 / Ö02i

surrounds the seat seal 1OC, so that the cavity 6 is connected in a pressure-wise manner to a circular ring-shaped underside of the valve bsw * a relatively small area ₉ so that the valve 10 is constantly moved upwards. m- feefindet "bssw» is closed) interrupts the air flow in the hem 6 from the irbisitegjliKderra ^ m above the piston

In KQlb <§nv ntil @ 10 is axially nand mittig- a further valve -angeordnet ₀ within a valve pocket 11A is a SDA Pilskopt ©© Stworentils 11 _s arranged a © the valve stem 11B in @ @ m lühriangs "or Steia © r ~ member 110 has, can be slid in a Bohinang aag © © rdnet ₁ iat- ₈ dialing at the upper end - & ®r spindle 1.1 B. a KolhQ '^ räiiTGh <sin @ n Hing 11E glidable in * a zj lindrisohen Bötoung is sealed 11B _s-above the EoXfoeirre & TILs 10 'srüsid © t ₉ wherein the upper Traveled, the piston 11 S ¹ is greater than the effective © area of the head 11 _o between the head 11 "and d. @ ra piston 111 is in the Eolbensfentil 10 © is provided in © line 1-OF _y which is constantly in an open connection with a vent hole 12LfegWo ä <3T Aiaßenlnft «If the valve -11 is thus open ρ. The pressure roughness above the piston 7 'is" vented " Äi @ s is the case, when the pressure in space 13A because of the piston 11E is g & iaug high, i? m the valve 11 open s, · ® hold ρ while the valve 11 is closed, w @ aa the pressure below the valve 11 exceeds the pressure exerted on the 'Ob @ i »t © ± l of the piston 111 ¹ in the haum 13 & o Dae valve 1Ί while the rüok- "hub © ® d © s ¥ ®2feset2g © s open and? / ähr © nd the work area closed @ -s @ n _e ''.

That

109809/0021

The obey © end of the housing 1 is closed with a cover 15, which actually completes the housing. The dachshund 15 has a central recess at 13A opposite the bore 11D and a circular ring-shaped recess at 13B on the circular area ang; into which © in © line: 1A opens. This line 1A he stretches -'si oh. along the Xängsdimension of the housing 1, and the fiami 13 A above the valve 11 is in constant open communication with a space 15 (which will be described later) below the second piston valve _β *

The lower end of the cylinder 5 delimits between itself and the bore 4 an annular cylindrical space j in which a flange 144, which consists of one piece with the lower piston valve 14, is slidably sealed by an annular seal 141 of U-shaped cross section. The main valve member 14, which is sealed by a sealing ring 14B at its upper paddling end, slides in the lower section of the bore 4 * The valve 14 has a, Puff © rpolatar ■ -.140 & vm. Steaming of the impact piston 7 d @ s eowi a © © Sitsdiohtsng 14D, at the lower Esnä dta cylinder 5. sealingly abuts sowi further © '-a NaOH below -Torepringandgiisehen projection 14F ,, d @ r in a Axialbohnaag on. ren End © the "G © häu & @ s 1 abdiciitend gi © ± t @ tö DnreJi. das Ventil 14" and ä © n Versprang t4F eratree & t eicä, eis © Zweidurckmasseraxialbohmingj where de? whether © r ©. (the larger) part. 14G · that dl®. herköiamiieJh® shoulder door of the bar 8 entry (a _e Mg ₀ 3) _r wäüraad-the lower (dar kleiaere) leil 14H as far as practicable in saddle? Anlag © vm DIE Stange'angeordn © _t-D is D © r- iaatere rope Bohrimg 14H is consequently © g wöhnlioh. rectangular ^ because the rod © 8; usually 'recliteckige • has a cross-section »

Hadial

T0Ö80Ö / 002-1 ——

Radially diaroh, the wall of the projection HF extends a line HJ to the pressure chamber 15 below the valve 14 ·· The inner end of the HJ line forms a seat for a ball valve 16. Another line HK leads from line HJ (when valve 16 is open) to Hole HG.

The servo valve 16 is mechanically controlled by the rod 8. The rod has a longitudinal groove 8A into which the ball valve 16 falls “when the rod is between its upper and lower position, ie the valve 16 is open during the work and office stroke, whereas it is closed at the end of the stroke by emerging from the groove 8A. On the side of the rod 8 opposite the groove 8A, there is also a shorter groove 8B, which only serves as a leakage path and is insignificant, especially if the rod is between itself and hole HH has a significant leakage distance · Further · leakage air escapes from hole HG · to the atmosphere. Below the handle 2 is a trigger control valve assembly, the housing 20 of which is attached to part 1 and 2, respectively. In this housing 20 there is a partially rotatable manual control spindle valve 21 _s which is actuated by a trigger 22 against a spring (not shown). The valve 21 has an arcuate line 21A, which in the rest position of the trigger 22 (FIG. 1) establishes a connection through a line 20A leading to the interior of the handle 2, while in the operating position of the trigger (FIG. 3) the line 21A connects this The connection is interrupted. The line 21A is always open to a line 21B, which is in communication with the room 15. In the working state of the trigger, the line 21A provides the connection between the line 21B and a

Vent line 109309/00 21

Ventilation line 23 h © r _r which is open to the outside air * The opening of the line .23 '.- sur "atmosphere. Can in any case be controlled by a" known safety valve, which usually has a plunger, which you can see. "■ ■ -. from the bottom of the uftpis: tölengehäu3 @ s extends .and. di © actuation-dor pistol © "Tsrhugtj until this is kosrnjes with dta; workpiece.in attachment", Diss is in d # r © in ~ -.

seilägigea I @ chnik known as ^ StoSseMißTorriölitung ¹ «" and as such © in the sweitssa B © ispi © l 'below. «»' represents · ', ■.:.'". ■ ' ^: -.- ■'. ■ ■■ .- ■ - ■ ''. ■ ', ..'

It is now evident that the. B © itiang. IA die- o'ff'sn® ferfeinduHg between, 'the ".-Batäs. 13B laad oberhall) .des -." Valve 10 and the room 15 lastetiaXb dss? ^ Atils 14 produces ₀

laughing "wir-d di © Axbeitsweis © ■ des Werkaeages wrote ©» «" In der-Huhalag® (lig _a . 1 -} -. "there is high pressure in parts 2 _p 6 _S -.1_3A $ 13B (and ils ijpuck space above the valve.) -as well as in the .JGtittang- 1 "A>'is dea ropes 20Α _? 21Aj 21Bj- 15 xojd'-6» by pressure in the * Xeil.i5 ycna' cylinder space is maintained) of the working piston 7 ' chnitt-en, -. where di * e -! äut 1-4H "bsw _o the -3jeckspi $ lraum. this barely: -vented _o The SerröTentil Ii is open (by 'the working pressure above 11G lowered @ pushed @ n-5" ^ and vented the piston 7 ψοη above through the ropes' $ 10 and 12A to .Atmosphäre <> the Ge. * - 10 exposed to pressure ist'dem "(where Wix -entgegengewirkt by the Wandbereich.bei IPD is - sanitbereich of Hauptr-entils ), so that the valve 10 is pressed firmly against the upper sand of the cylinder 5 "" is _ff de-r'-closed »" The main valve 14 is also pressed firmly against the lower hand of the cylinder 5 »The pressure in the. Part ".". 6 "is practicing

1 OS80 9/00

a constant downward force on the annular area of the plan full 14A of the main valve 14-, although this is not always an additional force, but at least ₍ such a force that it opens the valve 14; when the pressure chamber 15 is vented.

Once the Albsmg 22 is pressed, the control valve 21 is operated and the working stroke initiated. "Through the valve 21 of the Drock of all lines and chambers with the exception of the ridge is ³ 6 interrupted, the other lines and chambers (dureh 21B. ₅ 23) to be vented to the atmosphere. The immediately effective pressure is therefore that prevailing in space 6, which acts upwards on the circuit of the main valve 10 (at 10D), so that the valve 10 is raised and opened, whereby as a result of the now open large Opening area between valve 10 · -jm & the upper edge of the cylinder 5, the whole upper area of the working piston 7 is exposed to the working pressure. The servo valve 11 is closed by the pressure below it.

After the pressure iai space 15 below the main valve 14 is canceled, this valve is free, the entire opening cross open the cut at the lower edge of the cylinder 5, so that the piston 7 is unimpeded in its working stroke.

Just after the rod 8 begins its downward movement, the servo valve 16 opens (by stepping back into the hat 8A) « The sum component 14J and by 15 sur atmosphere now open line 14K, directs the ventilation from below of the piston 7ο

As soon

BATHROOM OFiKBINAL

09S0Ö / ÖU21

As soon as the servo valve 14 has fallen, a opens Another ventilation element, as the radial openings T4Lim Flange HA with the openings IB in the wall of the housing 1 align.

As soon as the trigger 22 is released, the general, above-described print image according to FIG. 1 restored, wherein in addition, due to the open servo valve 16, the Compressed air enters the cylinder pressure chamber below the piston 7 and brings about the lüekhub. The ■ valve TO istdureh the down pressure closed, but the servo valve 11 is open (because the pressure under-viewing force exerted on it was canceled), so that the space above the piston 7 is vented.

With regard to the modified embodiment of the above The embodiment described is referenced to FIGS. 4-7 Reference is made in which like parts have like reference numerals. This is an air pistol with a butt shooting device, a different trigger operated Tentil land a tentil through which the underside of the working piston is vented in a working phase that takes place before the working stroke phase For example, the end of the working stroke can be bruised by air below the working piston. In this embodiment, a catch is also provided that the Holds the working piston in the upper position of its stroke, so that a stable working method is guaranteed

The main components are generally the same as those in the first example. The working piston 7 goes into the cylinder § ^{nin and aer} unä actuated the rod 8, while a main housing 1 has a hollow pistol grip 2 and at the upper end the cover 15 and the air line TA.

■ - · ■■■■ One

1088O.8 / U.Ö21

"IMSPECTED

A slight deviation can, however, be seen in FIG. 7 namely the four surfaces 5A which delimit the air ducts 6 between the cylinder 5 and the housing 1. A main suction piston valve 10 and a lower main piston valve 14 are also provided. The rod 8 no longer controls a valve according to the groove arrangement of the first embodiment.

These changes are used for more positive control the movement of the upper and lower valve.

The propulsive power of the pistol is improved by the lower Piston valve H lowered and thus the underside of the drive piston 7 to the atmosphere - before the upward movement of the upper valve 10 for connecting the upper working chamber with the compressed air - is vented. The new valve arrangements serve to maintain valve movements that occur automatically one after the other.

An additional valve 30 is provided in the cover 13 and serves to connect the line 1A either with the compressed air by means of chamber 13A or to vent the chamber 13A through outlet 31 '.

The operation of the device is as follows. As soon as the Chamber 13A is connected to the pressure wave, this becomes Piston valve 10 depressed in a manner and performing a function similar to that previously described Gun are the same. When pressure exerts a force the shoulder of a valve spindle 3OA and presses it down, thus connecting the line IA with the chamber 13A through the valve seat 30B. At the same time it closes

the

1006097 00-21

. The sealing ring 300, which is made in one piece with the valve spindle 30, removes the line 1iL from venting the atmosphere _e

If ßle line IA via -TantiX 30 and. Chamber - 13A iiit _: - the compressed air is connected ^ wi5? D the pressure is directed towards the chamber ".. 15 thus the feati! 14 is lifted and the bottom of the cylinder. 5 thanks to the ' contact with ' the seal 14D is sealed»

The pressure in d @ r Eassm © r 15 wi ^ d atieh gus? Uaterse.its des Drive piston 7 through-Si © i'titragen 14J in femiil 14-directed Obviously you have 2? S.iar üst @ rs @ it © - .. dts Solljens 7 directed © pressure the latter to exhale with the. The slave rod 8 to si © come into contact with a small protruding end piece 30D of the valve 30 and are therefore fixed. places are «.

Since the © force acting on the underside of & © s piston 7th ■ • is greater than the force acting on the Häefe® 5QA®, the "Yen til 30 is lifted enough" to protrude the sealing area * between the seal 30E to iant to vomit »Dadiarcli-kaan I» ufts out. The chamber 13A through the inlet 1ΌΕ on the upper side of the valve 3Q stopes ήρΑ raise the valve 30 to its upper position, with the admission of further pressure from the chamber 13A through the valve seat 30B is interrupted "Drarc the further slight upward movement of the valve 30, the line 1A and the chamber 15 are vented to the atmosphere via the seal 300", the drive piston 7 and the valve 30 remain thanks to the fact in this .upper position, that the air pressure through the line 10E is below

ÖÖSÖÖ / 00

dea valve 30 and on piston 7 at the end of its upstroke by coming into contact with permanent magnet 40 or mechanical lock (an example of which is shown in Figures 8-11 and in greater detail in Figure 12), so that the present condition is also maintained is maintained. The magnet or the lock 40 is arranged in the piston valve 10 and works together with a steel washer below the nut 9. Thus, this magnetic device acts as a detent and holds the piston 7 in its upper stroke position with sufficient force to prevent any rebound bsWo to avoid an unstable position and also to ensure that the piston does not move down _{or down under too little pressure or the like}

After chamber 15 has been vented to the atmosphere via line 1A and seal 3OG _} the permanent pressure exerted on seal 141 and the flange section of valve 14 drives valve T4 down from chamber β, so that the underside of the working piston 7 is connected to the atmosphere and the piston is made available for another operation _o

The valve 30 remains in its upper position until the air pistol is ready to fire again. At this time the chamber 1JA is vented and thus the pressure below the valve 30 is released through the line 10E. After the pressure is released from chamber 13A _? raises the air below the valve 10 the same in its upper position - as in Pig. 5 - = - so that the seal is restored between the underside of the valve 30 and the seal 30E * This allows further entry of air

by

1090 0§ / 0 021

prevented by the line TOE when the chamber 13A again is connected to the pressure wave.

This embodiment of the air gun also has a device for automatic control of the joint or »open * bounce, which works as follows. .

This device consists of a hollow rod 35> which is closed at one end 35A, the rod is through the Trigger 35B raised, allowing additional air to enter the chamber 13A is prevented by the seal at 35C * By an additional slight lifting of the rod 35 wifcd broken the seal 35D so that the in the chamber 13A trapped air through a hole 35E in the Rod 35 can flow out downwards.

There is one at the lower end of the rod bore 353 Cross line 351> which with a line. 36 is connected in the housing. Line 36 is connected to another line connected in which a valve 37A operates. The valve 37A has a sealing ring 37B, which in turn is actuated by an outwardly projecting push lug 37E, which is raised when the air gun comes into contact with the workpiece, creating both a safety device as well as shock control is achieved.

When the air gun is removed from the workpiece, it is located the valve 37 is normally in its lower position, since the pressure from chamber 2A is applied to valve surface 37C works. In this position, air can also enter the Flow chamber 13A, which in turn is attached to the outside Grooves on the outside of valve 35 connected at 35G.

As already mentioned, the air admission to chamber 13A interrupted by valve seat 350 when trigger 35B is raised. If the valve .37A is now raised, until seal 37B is above conduit 36, any further air pressure will be admitted through the upper section the line 37D interrupted. At the same time, the compressed air remaining in the chamber 13A can pass through the seal . device 35D and the hollow portion 35E through the transverse holes 353? and line 36 through line 37 to atmosphere escape. Through this venting of the chamber 13A comes the Air pistol apparently to the shot, since the piston valve 10 can lift.

It is now evident that the pistol will not be ready to fire can without lifting the valve 37 and venting the chamber 13A via the valve seat 37B. By the presence an expedient means for lifting the valve 37 when the tool comes into contact with the workpiece is a Obtain appropriate security devices in a very cheap way. With the pistol you can only alternate fired when the trigger 35B is touched or the valve 37A is locked in an up position is; it can be provided according to the invention, a removable locking pin or other retaining means to the Hold valve 37 in its upper position ^ if E.g. trigger controlled single shots are required.

A third alternative method can be used. By doing valve 35 left in the closed position at the top and convenient means (e.g. lug 37E) for lifting of the valve 37 after the tool with the workpiece

1Ö9809 / ÖQ21

,, is provided come into contact -is, Mt can kick the gun and the cock trigger be tensioned again only by Xontakt with the workpiece, d _o h _ö DL® Wiβderlierstellung d @ r pressure communication with the Kamiier 13A can through the conduit 37D, the Line 37 and the hollow spindle of the F © 2X "tils 35 can be reached", ".. ''.."'.

In particular, with reference to the lig _o 7 it is clear that * "is attached means of four lläohen 5A in this embodiment d®r cylinder 5 in the housing 1" In .the i .ist'er diarch a. Bensingsicherragsring 5B in Ztatritt su'-sginta Eadea atun. Installation and dismantling that a tool is made possible by means of the four arched raises between the surfaces 5A. .

Palis arranged in different ways a Bohnangen © rope © let air through nuts,., Siad aie sternfoaaig. or on. Similarly, "grooved So" z _o "Be is a liihrung shown directly above the would read 371" ■ the, ^ although this is not visible grooved ISTJ in the longitudinal direction from the drawing, =, Ähniicherweise the rod upper 3.5 on its outer surface along its Grooved section to enable air flow (deho voa 35C to -55D) o ■

Fig. 8 _f 9, 10 and 11 © illustrate the second embodiment of the present invention Törrichtung _s what in some ways easier - than the first is. This embodiment has some features of the previous two Eon =

and.

At the same time, struktionen lets others miss »In this one In this case, new reference numbers were used.

100809/00

■ - 24 -

The main structure consists of an outer housing 101 with a laterally extending pistol grip 102, both ropes being hollow and continuously supplied with compressed air, namely in their cavity 103 when the pistol is in operation. "Inside the housing 101 is the main working cylinder 105 of Radial webs 104 supported, the lower part of the cylinder being sealed at 106 against the outer housing © * The bottom part of the housing 101 has a kit _? the advertising is discussed below which a cylinder and a few lines vorgesehen- a ± nä _p

The working piston 108 goes within the cylinder 105 and the rod 109 is attached, which is long-suffering. Although almost along its entire length, which is indicated at 109Λ "directly on the upper part of the rod 109" immediately below the piston 108, the rod has a full cross-section ₃ as indicated at 109B, this rope fulfilling the function of a valve, such as The rod 109 slidably extends through a passage in the bottom of the housing 101.

The upper inner edge of the housing 101 is cylindrical at 110 formed (coaxial sum cylinder 105), the diameter this training is larger than that of the bore of the cylinder 105 »The cap 107 has a further coaxial cylindrical hollow interior at 111 with a 'diameter larger than that at 110.

- · ■. Within

100809/0021

Inside cylinders 110 and 111 is the upper main valve 112 slidably arranged and by appropriate sealing rings sealed * In its lower or closed Position (Pig * 8 and 10) the valve 112 is through a ring 113 sealed, on the upper edge 114 of the cylinder 105 protruding somewhat from the cylinder 110 »The edge of valve 112 may be tapered at 112A, for example, since the air pressure up on valve 112 on its area acts outside the sealing ring 112A »

The main valve 112 carries two servo valve assemblies in through holes that extend from top to bottom. The first of these valves is the one in the middle Üiellerventil 113, which extends upwards and is seated at 114 in valve 112, and a spindle 115 has, to which a piston 116 is connected, which is slidable in a cylinder 117 formed in the main valve The main valve has radial lines 118, from above the valve head 113 (and below the valve piston 116) lead to the outer circumference of the main valve 112, namely above its smaller and below its larger diameter, in which area EinkpeisringfSrmiger Space 119 within the cylinder 111 remains »The ventilation -table lines 120 lead from this room to the atmosphere, namely through the cap 107.

In the bottom rope of the line, in which the valve is located 113 is in an expanded part of the same at 121 an elastic gasoline sealing ring is arranged. At the The apex of the working piston 108 is located on his Circumferential grooved projection 122 which extends into and comes into abutment with the locking ring, this being the case

arrangement

10SÖÖSMÖÖ21

Arrangement a catch or lock "forms through which the Piston 108 and the valve member 11.2 in their uppermost or lowest positions are held until a sufficiently large force actuates them by breaking the lock. This arrangement serves essentially the same purpose as the magnetic barrier system shown in FIGS.

A second servo valve is also located in the main valve member 112 arranged, which has two annular valve surfaces 123A and 123B on a rod 123, the ends of this The rod (which slides as a whole in a valve bore through the valve member 112) is exposed to the pressures below or above the valve 112, depending on which pressures are required for the corresponding cyclic operation are. Your lower end comes into contact with the piston 108 when the latter is in its upper position Hubes is located. The faces 123A and 123B act as Spindle valve with the annular space 123C between These areas are always open to a line 118 and consequently to space 119. In the valve member 112 is also a radial line 124 is arranged, which leads to the space 123C is open when the surface 123B is in its upper Position is (Fig * 8, 9) and which (Fig. 10) is locked when this servo valve is in its lower position lies. Line 124 is aligned with a line in cap 107 when main valve 112 is in it lower position (Fig. 8 or 10). If that Valve 112 is in its lower position and also the servo valve is in its lower position, through the Area 123B, the line 124 to the space above the valve member 112 is open. In this position - that of the 10 corresponds - the line 125 to the space in the cylinder 111 located above the valve is thus open.

Me

109609/0021

• The line 125 is made in the wall in the .The 101 by line 126 continues di © _f which is to - © opens below Ziirn bottom of the construction extends "An ihr.aia lower bath line 126 in a cylinder 127, which is in the bottom section of the construction trorgSs © h © n "Ib diesta cylinder 127, the lower main ¥ tatilgli © d 128. moves back and forth ₉ which (Bin is piston-like valve and © in © has a slightly circular recess at 128A” because «= - BIIT air access ia the" is light-tree below it "the valve 128 is Torssgsweis® atas" mayest material as S ₀ B ₀ Ölieste® ^ & uamij manufactured _ft since diesigs valve ausüben'kann a dampening _{effect?... 9} .'when working piston 108 is lowered onto the valve, 'is' also made possible such a material © ine well ) sealing airf. dtm lower "'hand 1G5B the cylinder 105 sits en can _8. **' w®nn see the ven til 128. is in ■ sginer ■ upper position (I * ig, _e JO) ₀ The valve member 128 has an axial littslöffung at 128A ftr di © Staag © 109 which can be slid through dious opening. tB% "and swar with a significant _margin} - to which the rod formation at 109A also contributes, while the previously mentioned section" at 109B into the opening 128A (109B is the full cross-section of the rod and has a valve-like function) In full system enters the opening 128 and closes it (fig, 9) * when the piston 108 is in its lower position and "comes into contact with the valve 128". The valve member 128 also has a projection 128B, which can be seen extends up to a certain degree in the area of the cylinder 105 and ensures that additional damping is maintained for the working piston 108.

10-9,8.0-d / 00-21

The lower edge of the cylinder 105 has, for example, animal smaller ones cylindrical bores extending through this rim at 129 and a connection between the cavity 103 and the seat on which the valve member 128 comes into contact with the cylinder edge. In each of these bores there is a piston-like tappet 130, the function of which is to act as the valve 128 due to the air pressure prevailing in the cavity 103 always to be driven downwards. Therefore, the pistons 130 move the valve 128 from the position shown in FIG. 10 downwards into the position according to FIGS. 8 and 9, if this is the case for the pressure differences allow.

Below the edge of the cylinder 105 and through the wall Radial vent conduits 131 are provided therethrough which extend from above valve 128 lead when this is in its lower position (Fig. 8 and 9) and which are closed when this valve is closed in its upper position.

The valve control for the trigger by the operator is arranged in the foot section of the pistol grip 102. This arrangement has a finger-operated trigger that comes into contact at the top with a control valve 133, which is a spindle-like valve with an outer sealed Surface 133A and an inner surface 1 33B, these © surfaces slide sealingly with respect to FIG placed inside © Sealing rings in valve bore 1330. Off The upper l @ iX of the hole 133 leads a line 134 aach above through the wall 101 of the construction, the cap 107 ad into the space above the valve of cylinder 111 «, dies Line 134 is sran cavity 105-.opened when the A-fesug

is not withdrawn, and is to a further line 135 in the wall of the construction open when the tap is removed is, being at the same time by the area 133 of the compressed air <iuellej namely the cavity 103 is separated.

The line 135 leads to a ram control ^ if this is necessary _? The method of operation is comparable to that described in connection with the construction according to FIG. 4, if such an increase is not necessary ₅ , the line 135 is open to the atmosphere.

The operation of the pistol according to this embodiment is as follows. Figure 8 'shows. Die'statische position in which the gun is ready to fire stretched "Fig. 9 shows the gun at the end of their Schießhubes _o Figure" 10 shows the gun in which the working piston on its return from that in FIG. 9 shown is to the position shown in Figo 8, Fig. 11 shows a section of this? Figures along the line YY of Figure 8.

In all of these figures, the cavity 103 is shown fully charged with air pressure. In the position according to FIG. The valve 112 is _forced} at his seat. 113 to come "The lines 11 8 _f -119, 120 are all open to the atmosphere and just as open to the atmosphere is via the valve 130 the space above the projection 122 and the piston 108", the projection 122 is by means of the locking ring 12Tt with dsm valve 112 held in system, the AbEag 132 is of course below and therefore there is no problem with the valve 133 '

below

iO§8Ü9 / QG2t

below. The space of the working cylinder below the piston 108 is through the leather of the lower main valve and the Lines 151 open to the atmosphere. Pins 130 (the are under the pressure in cavity 103) hold the valve 128 below (i.e. open). The space 128A with the recess is under atmospheric pressure as the line 126 is connected to line 118 by line 124. The control valve line 135 is under atmospheric pressure Pressure, unless a surge control valve was arranged, since in this case the line in the position shown in FIG position shown would be charged with compressed air.

Assuming the pistol is fired through the trigger 132, then the position changes at the end of the firing stroke (FIG. 9) as follows: As soon as the control valve 130 lifts, it vents line 134 to atmosphere through line 135. The pressure above valve 112 is canceled. The compressed air in the cavity 103 acts below the valve 112 on its edge area and lifts the valve 112, the locking connection with the piston 108 being interrupted will. After valve 112 is opened, the top of piston 108 becomes the working pressure suspended »Since the space below the piston 108 is vented, the piston and the rod 109 accelerate very quickly driven down to do their work on the mounting bolt. In the meantime it is that (by the piston 108 returning from it) mechanically downward triggered valve 123 in fact always still held up by the pressure differential forces acting on valve 112. The servo valve piston 116 is in any case no longer exposed to the pressure and dalier closes the working pressure below the valve 113 of this valve

, BAD ORH3SNAL

and

10 ^ 809/0021

16Q39Q0

and thus locks off what would otherwise vent the job call t would represent to the atmosphere. The piston 108 hits the elastic projection 128B, while the rod section 1Ö9B blocks the passage 108A.

The triggering of the trigger 132 leads to the position shown in FIG. The control valve 133 (now in its lower position) again lets the working compressed air through to the line 134 and thus to the space above the valve 112. The valve 113 is thus opened and the working space between the piston 108 and the valve 112 via 118, 119 and 120 vented to atmosphere. At the same time the valve is driven by the pressure acting on its upper part downward pressure 123 'in which compressed air from the space above the valve 112 is now 124, 125-sum room T28a flows with the recess, and thus the valve 128 lifts _s so that this at 105B to the cylinder -105 in plant comes _v wherein the loading of the pins downward wirdj overcome 130 which even in their entirety have a relatively small force, "As a result of the upward movement of the valve 128 starts the piston 108 to move upward and the working pressure acting on the cross-sectional area of the rod section at 109B separates the piston from the lower valve 128, whereby working air flows through 128, then enters the lower cylinder chamber and brings the piston (and the rod) back upwards © Hachdem the piston YOP jump 122 Has entered the recess of the valve 112, the projection is held in the valve 112, which of course is below At the same time, the valve 123 is raised as a result of contact with the piston 108; the compressed air supply "in the

; management

Line 126 is interrupted and this line and the spaces above and below the valve 128 through first lines 126, 124, 118, 119 and 120 and then (after the valve 128 was lowered slightly) by the Lines 131 are vented to the atmosphere.

It can be seen that both the construction of the device according to the embodiment according to FIGS. 8-11 and their operation is relatively simple, and that lightweight and easily manufactured components are included in this device can be installed. The main components such as the structure 101, the cylinder 105, the main valve 112 and the piston 108 can be formed either all or at your choice as a molded body made of plastic material and, if necessary, be reinforced accordingly. The valve 128 can be made entirely from an elastic polymerisation product or rather hard rubber or mainly plastic Material, the protrusion 128B being made of fairly resilient rubber.

The parts shown in Fig. 12 are sufficiently numbered to correspond to those shown in Pig. 8, 9, 10 and 11 parts of the construction shown can be identified. In some cases and especially when using synthetic resin, it is considered advisable for the construction to use a modified construction of the working piston, of the upper main valve and their associated parts of the lock. This also leads to an easier one Replacing the rods.

at

10-9809 / 0021

IÖU43UU

-.35- :, '- - ■ ■ "■■■'" '.- :; ■ ■

In this modified embodiment, the is in general with 108 indicated "- working piston on a lower Part 150 built * through its central opening, the Rod 109 extends and which has an edge recess Holds a Q-ring 152 or a similar sliding seal having. The top or top completing the piston The apex part 151 is attached to the piston by means of loading screws, one of which is shown at 153 so that the 'King 152 in Position clamped or held. At the bottom of the Vertex part 151 a conical head 154 is attached, the. * at the end of the rod 109 is provided. In the center of the apex 151 there is a circular opening 155 in the wall of which has an annular recess for receiving a resilient ring at 156.

The upper main valve 112 has a circular recess in its lower surface in which a disc-like member 157 is located, which is secured at 158 by grub screws. Part 157 has an axial bore '.. 159., Which corresponds to the housing of the valve 113 and forms a continuation of the same. This bore extends into a short projection, 160 of circular cross-section, which extends downwardly from part 157 with which it is integral. The outer side of the projection 160weist .geringfügig a projecting bead or lip at 161, which is engageable with the resilient ring 156 _e Somitbildetdie bead with the spring ring a barrier which the already shown (such as in Fig. 8) 1st equivalent "

The material from which the vertex 151 and the part 157 can differ from the material of the main part 150

of the piston 108 and the valve. 112 differentiate so some parts made of steel and the others made of synthetic Made of resin. It can be seen that the impact force in rod 109 (i.e. that exerted on head 154) is transmitted directly from the apex 151, on which the air pressure acts, while the components of the locking device can be made of suitably hard and durable material.

Obviously, the device is susceptible to numerous modifications in terms of construction and details. A inventive feature in both embodiments consists in the presence of a double-acting working piston, which is driven by the compressed air for its return stroke and the two main valves and the secondary or Servovalves is assigned, so that these valve arrangements can act in the manner shown.

fig. 13, 14 and 15 show a modified form of the one shown in Fig. 8-12 shown air pistol, namely in the corresponding work phases. The construction of these modified embodiments is largely the same as the previous embodiments are identical with enough reference numbers so that the corresponding parts can be easily found can.

In this construction, the upper main valve and the significantly modified parts assigned to him. The cylinder head, or, the cap 200 has an inwardly (downward) extending cylindrical projection 201, the one axial center valve bore 202, in which a spindle valve 203 with three sealed by sealing rings

, Surface

1Ö9ÖÖÖ / OO21

.Faces 2O5A, 203B and 203C is slidably arranged, the are at a distance from each other on the valve and lie in the bore 202 in full contact, as well as with a truncated cone or poppet-type head 203D, who sit on a complementary conical seat can, which is provided in an annular end plate 204 which is attached to the gate jump 201 in a corresponding manner is »An extension spindle 203E of the spindle valve extends through the plate 204 and is through a Ring 205 sealed. The spindle 203E forms a ram or a stop member with which the head 154 of the rod 109 comes to a stop when the working piston 108 is in its up or static position (i.e. when the air pistol is at rest). Through this Stop, the spindle valve is held in its upper position.

In this embodiment, the main valve member adjusts is an annular element, which is indicated generally at 206. This link 206 has an internal bore 2O6A, which surrounds the projection 201 in full plant land opposite him is sealed by appropriately arranged O-rings. The diameter of the gate 201 (and hence the hole 206a) is the same as the diameter of the working piston .108

The valve member 206 has a large outer diameter on its upper part and a smaller one on its lower rope Outside diameter, as can be seen at 206B and 206G. Consequently this link has the characteristic properties a differential cross-sectional piston. As shown at 206D, the lower edge of the link 206 is narrowed to form tandes an annular flat end that seals on

the 100809/0021

the end of the master cylinder 105 is seated (Figs. 13 and 15). Member 206 is preferably made of synthetic or plastic material produced, whereby the sealing effect is expediently increased.

The valve member 206 is around its part with the larger diameter provided with sealing rings on 2O6E and 206F. Through this For example, the valve can slide sealed in a complementary bore in the cap 200. A sealing ring 2O6G seals similarly a smaller hole 207, which is in the Housing 101 is provided.

It should be mentioned at this point that the plate 204 and the Piston apex 151 again that shown in FIGS. 8-12 Have locking order. It also rises at this Embodiment of the apex 151 (when the piston 108 is in its upper position) from the cylinder 105 and is arranged so that it is in the lower flange of the Valve member 206 enters, i.e. it extends a short distance Section into hole 206A.

The arrangement of the air lines in this embodiment are as follows. The line 134 leads (from the trigger valve) to the annular space 210 in the cap 200, which is above the main valve 206 when this valve has not fully assumed its upper position. Yfenn the valve 206 is in its lower position, the space 210 opens through the line 210A to the annular Spindle valve area between surfaces 203A and 2O3B. A line 211 is always through the projection 201 and the plate 204 between the upper space of the master cylinder and the space within bore 202 above the

Spindle valve 1 Ö 9 Ö 0 9/00 S1

Open spindle valve 203. ·

The lines 212 lead from the bore 202 and are over a circular hat around the "projection 201 around a bypass 213 (which extends through valve 206). This connection takes place when valve 206 is in its lower position (Figs. 13 and 15). In the lower position the opens Detour 213 to line 126. Another line 214- leads from the bore 202 to the upper space of the master cylinder at 215. The projection 201 is in the direction of its lower end - as can be seen from the ligures - "beveled" or rejuvenates and thus forms an inevitably open one Space when the piston 108 is in its upper position. As shown in Fig. 13 and 15, the Space 215 closed by the apex of the piston 108 -if the piston is in its upper position and that Valve is in its lower position. In the end connect the lines 216 through the wall with the smaller diameter of the valve member 206 through the space 215 the parts 217 and the housing 101 with the atmosphere, when the valve is down -

The operation takes place as follows. Starting from the ^{position 1} shown in Fig. 13, the trigger 132 is pulled off when the air pistol is loaded with compressed air _{through the handle 102 0} Des? Room 210 is vented via the part 134- baw ₀ 135 aur / atmosphere ν which exerts on dia tants? © Kant © des Ventilglieä © s 206 © pressure is ays d © m Gleichg © = wioht brought wo3? D © n _? so that the valve is raised abruptly a fdfi Dec ⁵ seat "at 2O6D is now open and. the edge of the KoI-b@nschei.tsis 151 has left the hole 206A ^ where d © 2>

gang ©

whole area of the basket 108 is exposed to the pressure and the working stroke takes place while the locking connection is broken is »When the piston 108 withdraws from the spindle valve 203, the pressure (through part 211) forces the spool downwards, whereby the position according to FIG. 14 is obtained.

After releasing the trigger 132, the Pig. 15 shown Location received. The lower valve 128 is now closed by the pressure prevailing below it and through the void (part 128A) is below the piston 108 compressed air supplied, -which it is raised in its Eückleerhub is »The upper cylinder space is vented to atmosphere via 2.16 and 217. The spindle 203 is no longer standing under pressure and can be lifted as soon as it comes into contact with the piston 108. The pressure coming from part 134 moves the Y-valve member 206 downward, so that the in Fig. 13 position shown is restored when the spindle 203 is moved upward.

While this construction is similar to that shown in Figs. 8-12, it has the advantage that the pressure spaces, which with Pressure medium must be charged or vented, much smaller are, so that the air consumption is also reduced. The valve member 206 is much lighter than the main valve 112. One could do without a whole valve unit (i.e. the functions of parts 115 and 123 according to the previous figures are now communicated with the others through valve 203 Movements fulfilled). The feature that the piston 108 is directly connected to the valve 206 (thanks to the overlap mentioned above) working together is advantageous, since in this way the

Pressure

1 Ö i Ö Ö 9 / Ö Ö

-39 - "■■■ - ■ -"'^; .- ■ "■

Pressure on the working piston even more, faster and more abruptly can be exercised. This feature also allows the working piston has a slightly longer stroke (with the same dimensions of the pistol) and thus has an advantage in terms of the performance.

With respect to the last embodiment, it is hardly necessary to mention that the line 135 again with a Impact valve control can be connected. ■ "",

The air pistol described above can mostly be made from synthetic idzw. plastic material, although certain parts such as, plate 204 and the apex 151 as well as the rod 109 appear to be better made of a tough and hard material such as steel Need to become.

Claims

TÖ9Ö0 9 / 0Q21

Claims (21)

Claims 1 · Air pistol or pneumatic device for driving of fastening bolts and the like, characterized through a housing (1) in which a master cylinder (5) is arranged with open ends, a double-acting main piston (7), which is in the main cylinder for driving the Fastening bolt works, a first main valve member (10) at one end of the cylinder (5), its more effective Cross-sectional area is at least the same as that of the main piston (7) and can open and close substantially the entire cross-sectional area of the cylinder, as well as second main valve member (H), which has the same cross-sectional area and is arranged at the other end of the cylinder and opens and closes substantially the entire cross-sectional area of the cylinder. 2. Air gun according to claim 1, characterized in that the first main valve (10) is a first servo valve (11i). having, the one used to control air flow to or from a Side of the main valve is used and the main piston (7) is mechanically actuated directly during part of its stroke is. 3. Air gun according to claim 2, characterized in that the first main valve (10) has a second servo valve, which is used to control the air flow from or to one side of the main valve, the second servo valve has a piston that works in a cylinder, wel.-cher is provided in the main valve so that the servo valve is moved according to the pressure difference on this piston. 4 »Air pistol with a housing in which a master cylinder with open ends is arranged, characterized by a cavity (6) arranged separately from the cylinder (5) for the" air, the housing (1) having a first and a second valve cylinder on one AChSe _1, which is identical to that of the S; main cylinder, limited; which is slidably arranged in the first valve cylinder and can open and close substantially the entire cross-sectional area of the master cylinder, and by a second main valve member can be opened or closed. 5. Air gun according to claim 4, characterized in that each of the main valves (10, i4) itself is a double-acting one Piston - is that works as a differential range piston, 6 »Air pistol according to Claim 5, characterized in that one main valve two different effective outer diameters a-ufweisj. and that the corresponding Yentila ^ list for two corresponding differently effective Inneabohr-angsdiarohißeasei? on- © Luftpistol © naöh Amsprnch 4 _s thereby k @ nns "ihnet ₉ Was that first © Hauptirentilglled (10) ei". t2? @. t © s ■ element (11) aufwei-at-j 'das.. ± m Haiapt ^ sntil Ib ä © y riehisig glides and iai * daa Haxipijkolben ja ^: © 0asöisQh. ia An lag © kcanraen and soffiit [ψοη ito turn in motion: kaBu _Q ". ■. ■ 8. Air gun according to claim 4, characterized in that the first main valve member (10) is a second servo valve em ent that slides in the main valve in the axial direction and due to the pressure differences on the main valve member can be moved operationally. 9. Air pistol according to claim 1, characterized by a locking device (40), which can be switched between the working piston (7) and the first main valve member (10) to this hold together until a certain amount of air pressure is applied between the two. 10. Air gun according to claim 9, characterized in that the Locking device (40) has a resilient input and a complementary groove. 11 · Air pistol according to claim 9, characterized in that the Locking device (40) consists of a permanent magnet. 12. Air gun according to claim 1, characterized in that both Main valve members (10, 14) each sit at one end of the main cylinder and both back and forth in a cylinder the bore of which is larger than that of the main cylinder, where the difference area is exposed to air pressure can be so that the Yentilglieder are operated. 13. Air pistol according to claim 1, characterized in that the second main valve member is provided with an elastic part (14ß) with which the main piston can come into contact at the end @ of its working stroke, so that this elastic member auoh as a buffer or rebound serves for the slowing down of the main piston and the second TentiXglieä ia its closing movement can increase the acceleration of the main piston in its back stroke. 1Ö9801 / .Ö02-1 üi. 14 »Air pistol according to claim. 1, characterized in that the second Yentil member, when closed, is driven in the direction of its open position by, smaller piston that from the Air pressure is applied to the gun. 15 «air pistol according to claim 1, characterized in that the second valve element (14) has a substantially centrally arranged axial line (14G-) through which the gun spindle (8) can occur, as well as an air line whose Controlled by the valve action caused by the sliding movement takes place. ' 16. Air pistol according to claim 1, characterized by one of Hand operated control for the trigger (20, 21, 22) as well as a surge control and a valve which through this is operated and the supply or discharge of Compressed air to operate the main valve elements in which the Open and close comprehensive operation controls that to expose one side or the other of the main piston the pressure required for the working or return stroke, 17 »Air pistol according to claim 4, characterized in that the first main valve member during its sliding movement opens and closes air ducts between it and the first • Valve cylinders are lying. ■ · ... 18. Air pistol according to claim 4, characterized in that the first Yentil member with one of its ends at one end of the Master cylinder sits around an effective area that is smaller is as the entire effective area of the limb while his other side is always exposed in its total area * . - · ■ 19. 109809/0021 - - 19. Air pistol with a housing in which a master cylinder is arranged with open ends and with a double-acting Main piston, which is in the main cylinder for driving in the fastening bolt operates, characterized in that a cylinder head has a cylindrical projection (14F, 122), which extends from the housing, which makes it coaxial inwardly towards one end of the master cylinder, this projection (14F, 122) having a smaller diameter than that of the cylinder and a master valve cylinder in the housing coaxially surrounds the projection and has a diameter which is larger than gener of the master cylinder while an annular main valve member in the main valve cylinder is slidably arranged and slides on the projection and said valve member the corresponding end of the master cylinder, closes in an outer position and limits an opening to the master cylinder in the other outer position, the Cross-sectional area for the air passage is large enough that air can flow freely into the master cylinder, wherein a line provided with a valve is provided through which the main valve member is required for opening and closing Can be exposed to air pressure, 20. Air pistol according to claim 19, characterized by a servo valve which goes back and forth axially in the main valve member and by the release pressure and the mechanical contact with the working piston is operated. . 21. Air gun according to claim 19, characterized in that the main valve member designed as a circular piston (206) has two effective cross-sectional areas (206B, 2060) and thus acts as a differential piston. '22. ORIQiEML INSPECTED IÖÖÖOi / 00 2 1 -45 - - -; ■■■■ -. 22 »Air pistol according to claim 21, characterized in that the valve member has an inner bore with a uniform diameter, through which the valve member slides onto the gate, and has two outer diameters, and the main valve cylinder (105) also has two corresponding bore diameters »'/ ^: 25 · air gun according to claim 19, characterized in that _t the main valve member (206) having an interior bore (206A) in addition to the peak (151) of Hauptfcolljens for receiving this vertex in the rest position of Kolioens. 24> Air pistol according to claim 19, characterized in that the main valve member (206) in the initial position of the gun at the end of the main cylinder sits «, ν 25 * Air pistol according to claim 19 · characterized in that a locking device releasable by force is provided is that between the work coll) s (108) and the projection (201) can be switched » 26 »air pistol according to claim 19 *. characterized in that the main valve member (206) opens and closes air lines in its sliding motion, which between the main valve member »the projection and ( Lern HauptTentilzjrlinder Üe * 1-0 ti 0 9/00 ^ 1