EP1731271A1 - Pneumatisch arbeitender Klopfer sowie Verfahren zum Betreiben eines pneumatisch arbeitenden Klopfers - Google Patents

Pneumatisch arbeitender Klopfer sowie Verfahren zum Betreiben eines pneumatisch arbeitenden Klopfers Download PDF

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Publication number
EP1731271A1
EP1731271A1 EP05012390A EP05012390A EP1731271A1 EP 1731271 A1 EP1731271 A1 EP 1731271A1 EP 05012390 A EP05012390 A EP 05012390A EP 05012390 A EP05012390 A EP 05012390A EP 1731271 A1 EP1731271 A1 EP 1731271A1
Authority
EP
European Patent Office
Prior art keywords
percussion piston
pressure chamber
knocker
opening
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05012390A
Other languages
German (de)
English (en)
French (fr)
Inventor
Thomas Reis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Netter GmbH
Original Assignee
Netter GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Netter GmbH filed Critical Netter GmbH
Priority to EP05012390A priority Critical patent/EP1731271A1/de
Priority to JP2006169284A priority patent/JP2006341370A/ja
Priority to US11/449,206 priority patent/US7607490B2/en
Priority to AT06011983T priority patent/ATE409552T1/de
Priority to PL06011983T priority patent/PL1731272T3/pl
Priority to ES06011983T priority patent/ES2317364T3/es
Priority to DE502006001658T priority patent/DE502006001658D1/de
Priority to DK06011983T priority patent/DK1731272T3/da
Priority to EP06011983A priority patent/EP1731272B1/de
Publication of EP1731271A1 publication Critical patent/EP1731271A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/16—Valve arrangements therefor
    • B25D9/18—Valve arrangements therefor involving a piston-type slide valve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/54—Large containers characterised by means facilitating filling or emptying
    • B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
    • B65D88/66—Large containers characterised by means facilitating filling or emptying preventing bridge formation using vibrating or knocking devices

Definitions

  • the invention relates to a pneumatically operated knocker and a method for operating a pneumatically operated knocker.
  • Pneumatically operating knockers are used in particular for tapping off caking from a container wall. It may, for example, be the tapping of dusty material from a container wall. Such tapping has proven to be useful and, if necessary, proved necessary if the dust-like material is not completely dry and also tends to bridge or build up. By a strong blow against the outer wall of the container, the dusty material can be loosened or dissolved and made to flow out.
  • a pneumatically operated knocker and a method for operating a pneumatically operated knocker is from the DE 38 19 112 A1 known.
  • a knocker of the percussion piston is moved away by applying an overpressure in the first pressure chamber of the striking plate or the container wall and in this case biases a between the percussion piston and the lid, strong spring before.
  • This spring comes after reversing a valve associated with the first cylinder chamber in the venting position, the task to move the percussion piston abruptly against the impact plate or the container wall and thus to cause the knock.
  • An arranged in the lid quick exhaust valve vents the first pressure chamber to the spring receiving the second pressure chamber, so that the air leaving the first pressure chamber is transferred into the second pressure chamber and, with a small force component, the spring force superimposed.
  • a similarly designed pneumatically operated knocker with arranged between the percussion piston and the lid spring is out of DE 38 19 111 A1 known.
  • a pneumatically operated knocker with spring is finally in the DE-PS 25 49 551 described.
  • the air line between the first pressure chamber and the second pressure chamber is guided outside the cylinder tube.
  • the object of the invention is to provide a pneumatically operated knocker and a method for operating a pneumatically operating knocker, wherein it is ensured that the percussion piston for performing the knocking process is abruptly subjected to this moving force for acting on the percussion piston.
  • the percussion piston is thus moved away from the impact plate or the container wall by the low pressure prevailing in the first pressure chamber until it seals the at least one opening in the lid.
  • the relatively high pressure in the region of the at least one opening in the lid is then applied to the partial surface of the percussion piston which is assigned to the opening and defined by the sealing of the striking plate and lid, which is substantially smaller than the cross-sectional area substantially corresponding to the internal cross-sectional area of the cylinder tube of the percussion piston.
  • the force acting on the percussion piston in this region is reduced, so that the high pressure prevailing in the second pressure chamber, despite the lower pressure surface, on the Percussion piston generates such a counterforce that is greater than the force acting on the percussion piston due to the pressure applied in the first pressure chamber. Accordingly, the percussion piston is moved out of its Abdicht ein, now the relatively high pressure acts on the entire cross-sectional area of the percussion piston, so that this is suddenly moved in the direction of the striking plate or the container wall and abuts against this and thereby causes the knocking process.
  • Valves that are assigned to the compressed air connections to the two pressure chambers are controlled so that when applying the relatively high pressure on the percussion piston the first pressure chamber is vented, so that the percussion piston must not be moved against an increased pressure in the first pressure chamber.
  • the moving back of the percussion piston against the lid by reversing the compressed air connection of the first pressure chamber and in particular venting the second pressure chamber, wherein a relatively low pressure in the first pressure chamber is applied. This pressure is only so high that the percussion piston can be moved to the position for sealing the opening in the plate.
  • the relatively low overpressure according to method step a) of claim 12 is for example 0.5 to 1.0 bar.
  • the relatively high overpressure according to method step b) of claim 12 is for example 4 to 10 bar, preferably 5 to 7 bar, in particular 6 bar.
  • the inventive method makes it possible to realize different heights of the knocker in a simple manner. It is a construction of the knocker with a relatively long displacement of the percussion piston conceivable.
  • the method for operating the knocker can be designed so that the relatively high pressure is not directly adjacent to the opening in the lid, but a lid upstream pressure accumulator is provided in the manner of a third pressure chamber , which is connected to the compressed air connection.
  • the knocker can build very flat. In such a case is dispensed with the third pressure chamber, thus the pressure accumulator.
  • a sufficiently sized valve takes over the task of the accumulator here.
  • the knocker may be designed differently, in particular in the region of the lid, with respect to the at least one opening.
  • Various openings can be provided in the lid, which are sealed by means of the percussion piston in its end position moved away from the striking plate or container wall.
  • the lid has a single central opening which is arranged concentrically to the central longitudinal axis of the lid
  • the knocker according to the invention is characterized by few moving parts. Basically, it is only necessary to move the percussion piston. When using a striking plate this is preferably mounted displaceably in the longitudinal direction of the cylinder tube in this. If no impact plate is present, the impact piston thus acts directly on the container wall, it must be ensured that the first pressure chamber of the knocker is sealed with respect to the container wall.
  • the percussion piston can be made very simple, with a substantially flat, surface facing the lid, which is also flat on this side.
  • the lid passes through the at least one opening, so that it is only necessary to provide a seal between the lid and percussion piston. This is preferably done by elastic seals, which are embedded in the percussion piston and / or the lid, for example by an O-ring surrounding the single central opening.
  • the knocker can be made particularly inexpensive if it consists of very simple items. This can be realized easily with the knocker. So is the cylinder tube as a commercial tube educated. It takes in the region of its end facing the container wall on a flange for attachment to the container. Inside the tube, the impact plate can be stored. The percussion piston is to be designed according to the internal dimensions of the commercial tube.
  • the lid is designed as a plate-shaped body, in the simplest way with the one central opening. The lid may be positioned against a lug in the tube and fixed axially by means of a circlip, with a seal interposed between the lid and the tube sealing those portions to one another.
  • the third pressure chamber may be formed on the side facing away from the container of the lid, the third pressure chamber, which is closed by means of a cover plate which is connected to the pipe end.
  • This cover plate is provided with the compressed air connection for the relatively high overpressure.
  • the pressure connection in the first pressure chamber takes place laterally through a bore in the pipe, wherein in this area the percussion piston is tapered, so that when applying the relatively low pressure, a resultant force component in the longitudinal direction of the tube results, which is sufficient, the percussion piston of the impact plate or to move the container wall away, in the sealing position with respect to the opening in the lid.
  • the need for operating the knocker valves and pressure regulator can be part of the knocker, thus integrated into this or completely detached from the actual knocker.
  • the area ratio of cross-sectional area of the percussion piston to the cross-sectional area of the percussion piston, which is acted upon in the opposite direction with a sealed opening in the lid, although quite a few smaller openings can be provided is quite big.
  • the entire cross-sectional area of the percussion piston effectively, so that the percussion piston is suddenly exposed to this moving force to accelerate the percussion piston.
  • the movement of the piston from the sealing position is triggered by the venting of the first pressure chamber.
  • this can suddenly be exposed to this moving pressure force because the seal between the percussion piston and cover is canceled and consequently the pending in the second pressure chamber relatively high pressure now abruptly over the entire cross-sectional area of the percussion piston is effective.
  • a preferred design of the knocker provides that the cover and the percussion piston have faces arranged in parallel on the mutually facing sides.
  • the lid facing the end face of the percussion piston and / or the percussion piston facing end face of the lid serves to receive a ring seal. This is in particular at a small distance from the opening, arranged concentrically to this.
  • the pneumatically operated knocker is structurally very simple and easy to install. It consists in particular of only a few components; Furthermore, the knocker is less susceptible to interference.
  • FIGS. 1 to 7 With regard to the description of the first embodiment of the pneumatically operating knocker 1, reference is first made to the illustration of FIGS. 1 to 7:
  • the knocker 1 is used in particular the tapping of caking of a container wall. He has as a central component on a cylinder tube 2, which is designed as a commercial, pressed in continuous casting tube.
  • the cylinder tube 2 is screwed in the region of its one end in a mounting flange 3, which is bolted to the container wall, not shown, wherein the surface 4 of the mounting flange 3 rests against the container wall.
  • the mounting flange 3 has a plurality of through holes 5 for the insertion of fastening screws.
  • a striking plate 6 In the area of Mounting flange 3 passes through the cylinder tube 2 a striking plate 6, which is sealed by a sealing ring 7 against the inner wall 8 of the cylinder tube 2.
  • the striking plate 6 is thus arranged in the region of the container wall and displaceable in the axial direction of the cylinder tube 2.
  • a percussion piston 9 is slidably mounted in the cylinder tube 2 in the axial direction of the cylinder tube 2.
  • This has a central cylindrical portion 10, a the impact plate 6 facing frusto-conical portion 11 and a sealing ring 39 which is inserted on the side facing away from the striking plate 6 of the cylindrical portion 10 in a concentric with the cylinder tube axiscoreringnut 12 of the section 10.
  • an intermediate ring is used in this, which has the function of a lid 15. This is applied to a recess 16 of the cylinder tube and is axially fixed by means of a locking ring 17.
  • a sealing ring 18 seals the plate-shaped cover 15 to the inner wall of the cylinder tube 2 out.
  • the lid 15 is provided with a respect to the longitudinal center axis of the cylinder tube 2 concentric opening 19 which passes through the lid 15.
  • the diameter of the sealing ring 39 received in the cylindrical portion 10 of the percussion piston 9 is slightly larger than the diameter of the opening 19 in the lid 15.
  • the lid 15 and the cylindrical portion 10 have end faces arranged in parallel on the sides facing each other.
  • the sealing ring 39 thus seals the percussion piston 9 with respect to the lid 15 in the immediate vicinity of the opening 19. This results in a large area ratio between the (total) cross-sectional area of the percussion piston 9 (and thus the inner cross section of the cylinder tube 2) and the cross-sectional area, which is enclosed by the sealing ring 39 (and therefore only slightly larger than the cross-sectional area of the opening 19, the the partial area of the cross-sectional area of the percussion piston 9 represents).
  • the lid 15 is placed, starting from the surface of the container 4 associated with the container, approximately in the transition from the second to the third third of the length of the cylinder tube 2.
  • the impact plate 6 facing away from the end of the cylinder tube 2 is closed by means of a further lid, which is referred to as a cover plate 22 for distinction.
  • This is screwed into the cylinder tube 2.
  • the cover plate 22 is provided with a central, continuous threaded bore 23 for connecting a compressed air connection 24.
  • the cylinder tube 2, adjacent to the mounting flange 3 is provided with a radially extending threaded bore 25 for a compressed air connection 26. This opens in the area in the interior of the cylinder tube 2, which faces the frusto-conical portion 11 of the percussion piston 9, in the case of impact plate 2 resting against the container wall 2 and impact plate 9 lying against the impact plate 6.
  • FIGS. 1 to 7 the threaded bore 25 forms the air inlet for the piston chamber, whereas the threaded bore 23 forms the air inlet for the pressure reservoir of the knocker.
  • Figure 6 illustrates the percussion piston 9 in its one end position, when resting against the impact plate 6.
  • Figure 7 illustrates the percussion piston 9 in its other end position, in which the sealing ring 39 sealingly rests on the cover 15.
  • a first pressure chamber 27 is formed between the percussion piston 9 and the striking plate 6.
  • a second pressure chamber 28 is formed between the percussion piston 9 and the lid 15.
  • the compressed-air connection 26 has a compressed-air source 29, a pressure regulator 30 and a 3/2-way valve 31.
  • the pressure regulator 30 regulates the pressure which is present at the first pressure chamber 27 to 0.5 to 1 bar.
  • the compressed air connection 24 is provided with a compressed air source 32, a pressure regulator 33 and a 3/2-way valve 34.
  • the pressure regulator 33 regulates the pressure the in the formed between the lid 15 and the cover plate 22 third pressure chamber 35 is present at 6 bar.
  • valves 31 and 34 and the required pressure regulator 30 and 33 may be part of the knocker 1, thus be integrated, or be completely detached from the actual knocker.
  • FIG 8 illustrates a modified control of the pressure chambers of the knocker 1.
  • the process is basically off, as described for Figure 6, but now with automatic actuation of the valve 34.
  • the valve 34 is by the use of a throttle 36 in a compressed air connection 37, the Compressed air connection 26 connects with the control of the valve 34, actuated with a time delay.
  • the actuation of the valve 34 may only take place when the percussion piston 9 has reached its voltage applied to the lid 15 end position.
  • the throttle 36 thus serves to switch on and off delayed switching of the valve 34.
  • the components can, as before, part of the knocker or completely detached.
  • the embodiment according to FIG. 9 is characterized in that the third pressure chamber 35 has been dispensed with.
  • the knocker 1 builds more compact, consequently with a shorter cylinder tube 2, the end facing away from the mounting flange 3 directly receives the lid 15.
  • the third pressure chamber 35 is replaced in this case by the specially dimensioned valve 34, which ensures the supply of a sufficiently large air mass flow into the second pressure chamber 28 in the corresponding switching position.
  • the control and regulation of the knocker 1 takes place in this embodiment corresponding to that according to the embodiment of FIG. 6.
  • the embodiment according to the figure 10 is basically formed according to the embodiment of Figures 1 to 8, but it is characterized by the flat design, d. H. at further shortened cylinder tube 2, which, however, has a much larger diameter.
  • the stroke of the percussion piston should be selected according to the dimensions of the knocker. It is for example 10 to 150 mm, preferably 30 to 80 mm, in particular 50 to 60 mm.
  • the diameter of the piston can vary very much. There are conceivable smallest variants with a piston diameter of 10 mm to large variants with a piston diameter of 1 m.
  • the diameter d 2 must be 20.21 mm in order to keep the percussion piston 9 in equilibrium. If the first pressure chamber 27 is vented, thus the pressure p 1 is lowered, a larger force acts on the cross-sectional area with the diameter d 2 than on the cross-sectional area with the diameter d 1 , so that the percussion piston 9 is moved in the direction of the first pressure chamber 27. Based on the above equation, it is obvious that, given three parameters, the diameter d 1 or the pressure p 1 or the pressure p 2 can be calculated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Paper (AREA)
  • Electrical Control Of Ignition Timing (AREA)
  • Liquid Crystal (AREA)
  • Nozzles (AREA)
  • Air Bags (AREA)
  • Servomotors (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Eye Examination Apparatus (AREA)
EP05012390A 2005-06-09 2005-06-09 Pneumatisch arbeitender Klopfer sowie Verfahren zum Betreiben eines pneumatisch arbeitenden Klopfers Withdrawn EP1731271A1 (de)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP05012390A EP1731271A1 (de) 2005-06-09 2005-06-09 Pneumatisch arbeitender Klopfer sowie Verfahren zum Betreiben eines pneumatisch arbeitenden Klopfers
JP2006169284A JP2006341370A (ja) 2005-06-09 2006-05-24 空気圧で動作する叩き機及び空気圧で動作する叩き機の運転方法
US11/449,206 US7607490B2 (en) 2005-06-09 2006-06-07 Pneumatic impact tool and method
AT06011983T ATE409552T1 (de) 2005-06-09 2006-06-09 Pneumatisch arbeitender klopfer sowie verfahren zum betreiben eines pneumatisch arbeitenden klopfers
PL06011983T PL1731272T3 (pl) 2005-06-09 2006-06-09 Odbijak pneumatyczny oraz sposób eksploatacji odbijaka pneumatycznego
ES06011983T ES2317364T3 (es) 2005-06-09 2006-06-09 Golpeador que trabaja neumaticamente asi como procedimiento para el funcionamiento de un golpeador que trabaja neumaticamente.
DE502006001658T DE502006001658D1 (de) 2005-06-09 2006-06-09 Pneumatisch arbeitender Klopfer sowie Verfahren zum Betreiben eines pneumatisch arbeitenden Klopfers
DK06011983T DK1731272T3 (da) 2005-06-09 2006-06-09 Pneumatisk arbejdende banker samt fremgangsmåde til drift af en pneumatisk arbejdende banker
EP06011983A EP1731272B1 (de) 2005-06-09 2006-06-09 Pneumatisch arbeitender Klopfer sowie Verfahren zum Betreiben eines pneumatisch arbeitenden Klopfers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05012390A EP1731271A1 (de) 2005-06-09 2005-06-09 Pneumatisch arbeitender Klopfer sowie Verfahren zum Betreiben eines pneumatisch arbeitenden Klopfers

Publications (1)

Publication Number Publication Date
EP1731271A1 true EP1731271A1 (de) 2006-12-13

Family

ID=35159993

Family Applications (2)

Application Number Title Priority Date Filing Date
EP05012390A Withdrawn EP1731271A1 (de) 2005-06-09 2005-06-09 Pneumatisch arbeitender Klopfer sowie Verfahren zum Betreiben eines pneumatisch arbeitenden Klopfers
EP06011983A Not-in-force EP1731272B1 (de) 2005-06-09 2006-06-09 Pneumatisch arbeitender Klopfer sowie Verfahren zum Betreiben eines pneumatisch arbeitenden Klopfers

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP06011983A Not-in-force EP1731272B1 (de) 2005-06-09 2006-06-09 Pneumatisch arbeitender Klopfer sowie Verfahren zum Betreiben eines pneumatisch arbeitenden Klopfers

Country Status (8)

Country Link
US (1) US7607490B2 (pl)
EP (2) EP1731271A1 (pl)
JP (1) JP2006341370A (pl)
AT (1) ATE409552T1 (pl)
DE (1) DE502006001658D1 (pl)
DK (1) DK1731272T3 (pl)
ES (1) ES2317364T3 (pl)
PL (1) PL1731272T3 (pl)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017099761A1 (en) * 2015-12-09 2017-06-15 Oerlikon Metco (Us) Inc. Powder hopper for difficult-to-flow powders for use in thermal spraying and method making and using the same
JP7171035B2 (ja) * 2018-11-22 2022-11-15 株式会社テイサク 流体圧式打撃装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE188566C (pl) *
US964875A (en) * 1907-01-23 1910-07-19 Harry Johan Hjalmar Nathorst Rock-drill.
GB191300772A (en) * 1913-01-10 1913-03-27 George Henry Rayner Improvements relating to Rock Drills.
US3365624A (en) * 1966-08-10 1968-01-23 Automatic Valve Corp Valve control system
DE1728071A1 (de) * 1968-08-21 1972-02-03 Irmer & Elze Maschinenfabrik Ventilsteuerung fuer Drucklufthaemmer
US3878902A (en) * 1972-04-03 1975-04-22 Susumu Matsuo Impact tool
US4070947A (en) * 1975-03-24 1978-01-31 The Cleveland Vibrator Company Springless impactor
US4850436A (en) * 1986-01-31 1989-07-25 Hayashi Manufacturing Company, Ltd. Attached pulverulent and granular material shake-down apparatus
EP1279622A1 (en) * 2001-07-23 2003-01-29 Kanekita Co., Ltd. Air pulser and devices utilizing the same
EP1442999A1 (de) * 2003-01-28 2004-08-04 Findeva AG Pneumatisch arbeitender Klopfer

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1264318A (en) * 1917-04-26 1918-04-30 John T Mcgrath Pneumatic tool.
US2699224A (en) * 1951-12-20 1955-01-11 Research Corp Electrode rapping system
US2862475A (en) * 1955-10-05 1958-12-02 Branford Company Pneumatic impact device
US3376790A (en) * 1966-12-27 1968-04-09 Vibrator Mfg Co Piston vibrator
US3608650A (en) * 1968-11-30 1971-09-28 Saburo Matsusaka Impact cylinder apparatus
US3747474A (en) * 1971-08-23 1973-07-24 Us Navy Controlled acceleration ejector piston
US3913460A (en) * 1972-08-10 1975-10-21 Mosier Ind Inc Impact damping means for fluid cylinders
SE445434B (sv) * 1983-08-01 1986-06-23 Atlas Copco Ab Vibrationsdempat tryckfluiddrivet slagverk
DE3819111A1 (de) * 1988-06-04 1989-12-14 Netter Gmbh Pneumatischer klopfer
US5065824A (en) * 1989-12-28 1991-11-19 Esco Corporation Hydraulically powered repetitive impact hammer
US5210918A (en) * 1991-10-29 1993-05-18 Wozniak Walter E Pneumatic slide hammer
IT1319005B1 (it) * 2000-10-16 2003-09-19 Luciano Migliori Cilindro pneumatico compatto con dispositivo di ammortizzazione

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE188566C (pl) *
US964875A (en) * 1907-01-23 1910-07-19 Harry Johan Hjalmar Nathorst Rock-drill.
GB191300772A (en) * 1913-01-10 1913-03-27 George Henry Rayner Improvements relating to Rock Drills.
US3365624A (en) * 1966-08-10 1968-01-23 Automatic Valve Corp Valve control system
DE1728071A1 (de) * 1968-08-21 1972-02-03 Irmer & Elze Maschinenfabrik Ventilsteuerung fuer Drucklufthaemmer
US3878902A (en) * 1972-04-03 1975-04-22 Susumu Matsuo Impact tool
US4070947A (en) * 1975-03-24 1978-01-31 The Cleveland Vibrator Company Springless impactor
US4850436A (en) * 1986-01-31 1989-07-25 Hayashi Manufacturing Company, Ltd. Attached pulverulent and granular material shake-down apparatus
EP1279622A1 (en) * 2001-07-23 2003-01-29 Kanekita Co., Ltd. Air pulser and devices utilizing the same
EP1442999A1 (de) * 2003-01-28 2004-08-04 Findeva AG Pneumatisch arbeitender Klopfer

Also Published As

Publication number Publication date
EP1731272A2 (de) 2006-12-13
ES2317364T3 (es) 2009-04-16
EP1731272A3 (de) 2007-11-14
PL1731272T3 (pl) 2009-05-29
DK1731272T3 (da) 2009-02-16
EP1731272B1 (de) 2008-10-01
ATE409552T1 (de) 2008-10-15
US20060278415A1 (en) 2006-12-14
DE502006001658D1 (de) 2008-11-13
US7607490B2 (en) 2009-10-27
JP2006341370A (ja) 2006-12-21

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