EP1375077A2 - Pneumatisches Schlagwerk - Google Patents
Pneumatisches Schlagwerk Download PDFInfo
- Publication number
- EP1375077A2 EP1375077A2 EP03405286A EP03405286A EP1375077A2 EP 1375077 A2 EP1375077 A2 EP 1375077A2 EP 03405286 A EP03405286 A EP 03405286A EP 03405286 A EP03405286 A EP 03405286A EP 1375077 A2 EP1375077 A2 EP 1375077A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- pneumatic
- piston
- flying
- mechanism according
- 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.)
- Granted
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 27
- 238000009527 percussion Methods 0.000 title claims abstract description 12
- 230000005291 magnetic effect Effects 0.000 claims abstract description 22
- 230000035699 permeability Effects 0.000 claims abstract description 13
- 239000003302 ferromagnetic material Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 5
- 230000001939 inductive effect Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- 238000010009 beating Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 206010037844 rash Diseases 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 208000010201 Exanthema Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000013528 artificial neural network Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 201000005884 exanthem Diseases 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009532 heart rate measurement Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
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- 210000002023 somite Anatomy 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
- B25D2217/0011—Details of anvils, guide-sleeves or pistons
- B25D2217/0019—Guide-sleeves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
- B25D2217/0011—Details of anvils, guide-sleeves or pistons
- B25D2217/0023—Pistons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
- B25D2250/141—Magnetic parts used in percussive tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
- B25D2250/221—Sensors
Definitions
- the invention refers to a pneumatic striking mechanism with a flying piston, in particular for an at least partially hitting machine tool, such as a drill Chisel.
- a conventional at least partially hitting machine tool with a pneumatic impact mechanism is in a partially rotatable guide tube over a Gas spring on, on an anvil and on the front end of a tool, beating Air piston reciprocable.
- the flying mass is subject to complex oscillation kinematics, their steady state of vibration is characteristic of the boundary conditions depends.
- the oscillation kinematics of the flying piston together with the other moving parts optimized by simulation calculations and practical experiments and realized constructively.
- a piezoelectric sensor detects the impacts of the percussion mechanism the tool and in combination with a transmitter allows a regulated Adaptation of impact mechanism behavior to the material to be processed. Such Impact pulse measurement does not allow a comprehensive statement about the Vibration state of the flying piston.
- the non-contact magnetic field-sensitive sensor which optionally has a permanent magnet for generating the magnetic flux, is the Movement of an axially reciprocating, impacted fly piston measurable.
- the regions of different magnetic permeability in the flying mass produce at the output of the magnetic field sensitive sensor almost a sinusoidal Signal whose amplitude depends on the distance of the sensor to the flying mass.
- the magnetic-field-sensitive sensor as, further advantageous differentially switched, solid-state magnetic field sensor such as (Hall sensor, AMR (anisotropic magneto resistance) sensor, GMR (giant magneto resistance) sensor, MR (magnetor resistance) Sensor, Ml (magneto-impedance) sensor or as inductive sensor including coil and Flow guidance executed, which are available as standard components.
- differential Sensors are less sensitive to the radial play of the flying piston. They only measure the Flow difference between two adjacent positions.
- the geometry of these areas is different from the air gap and the distance switched magnetic field-sensitive sensors dependent, wherein advantageously the axial Structure size of the areas at least the air gap (distance sensor leading edge to Flying piston) corresponds. Slightly larger structure widths are advantageous to the To increase signal amplitudes.
- For the measurement of the velocity course of the Air piston are as many axially spaced areas on the piston advantageous.
- the regions of different magnetic permeability are more than one formed axially spaced, air-filled radial grooves, which are technologically simple can be produced.
- the senor is radially outside of an optionally rotatable guide tube for the Air piston arranged non-contact, causing a measurement through the guide tube through is possible.
- the guide tube made of non-ferromagnetic material, whereby the Guide tube has a smaller influence on the flying piston radially outside enforcing measuring magnetic field exerts.
- the arithmetic unit selectively with respect to the kinematics of the flying piston activatable classification means, such as frequency filters, resulting in different Beat states are detectable and can be assigned, for example when hitting a tool on a structural steel embedded in concrete.
- the arithmetic unit controls the different, depending on Beat states of the flying piston, activated classification means corresponding Control means, for example, to reduce the engine speed and / or the speed of the Tool and / or the interruption or the regulation of the percussion drive and thus the impact performance.
- the arithmetic unit with a setpoint memory for an optimal kinematics of the flying mass and optionally further boundary conditions such as impact energy, impact number, Speed etc. connected for different materials to be machined which continues is advantageously organized as a multi-dimensional array, whereby the machine tool automatically adaptive to optimal kinematics of the flying piston and thus to optimum Abbau amalgam einregelbar is.
- a Leertschposition of the flying piston from the Sensor signal determined and via appropriate control means, such as the electric motor Schlagtechnik deactivatable, which provides additional catch for the flying piston, which place require and thereby extend the machine tool, can be omitted.
- An impact temperature from the sensor signal is advantageous via the arithmetic unit ascertainable and via appropriate control means such as the electric motor the percussion deactivatable, whereby the life is increased.
- the sensor 3 is considered to be an internally differentially switched, solid-state Magnetic field sensor is formed and generates a measuring magnetic field H whose magnetic flux in penetrates the radial edge region of the flying piston 2.
- the radial grooves of the flying piston 2 are 0.8 mm deep and 3.2 mm wide and form a remaining 1.6 mm wide axial Gutter 7 off.
- the sensor 3 is radially outside a rotatable guide tube. 5 made of non-ferromagnetic chromium steel tapered radially to 0.2 mm in one outer, axial measuring point area X contact-free fixed.
- the sensor 3 is with a Computing unit 6 connected in the form of a microcontroller, which further with the not shown engine electronics of the electric motor, also not shown is connected.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Actuator (AREA)
Abstract
Description
- Nulldurchgänge, Maxima und Minima
- Curve-Fitting (Stückweise cos-Fit, nonlinear leastqueres fit)
- Demodulation
- Fourier-Transformation, Power-Spektrum
- Filterung (Autoregressive Filter zur Spektralschätzung)
- Frequenzschätzmethoden (time-frequency analysis)
Claims (15)
- Pneumatisches Schlagwerk mit einem axial hin- und herbewegten, schlagend beanspruchten Flugkolben (2), dadurch gekennzeichnet, dass diesem radial ein berührungslos angeordneter magnetfeldempfindlicher Sensor (3) zugeordnet ist, dass der Flugkolben (2) zumindest radial aussen ferromagnetisches Material aufweist und dass der Flugkolben (2) mehrere axial beabstandete Bereiche (4) unterschiedlicher magnetischer Permeabilität aufweist.
- Pneumatisches Schlagwerk nach Anspruch 1, dadurch gekennzeichnet, dass der Sensor (3) als solid-state Magnetfeldsensor oder induktiver Sensor ausgeführt und optional intern differentiell geschaltet ist.
- Pneumatisches Schlagwerk nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass eine axiale Strukturgrösse der Bereiche (4) mindestens dem effektiven Luftspalt im Messmagnetfeld (H) entspricht.
- Pneumatisches Schlagwerk nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Bereiche (4) unterschiedlicher magnetischer Permeabilität durch mehrere axial beabstandete, luftgefüllte Radialrillen ausgebildet sind.
- Pneumatisches Schlagwerk nach Anspruch 4, dadurch gekennzeichnet, dass die Radialrillen 0,1- 1,5 mm tief und 0,5 - 5,0 mm breit sind sowie einen verbleibenden 0,1 - 3,0 mm breiten axialen Zwischensteg (7) ausbilden.
- Pneumatisches Schlagwerk nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Sensor (3) radial ausserhalb eines optional drehbaren Führungsrohres (5) für den Flugkolben (2) berührungslos angeordnet ist.
- Pneumatisches Schlagwerk nach Anspruch 6, dadurch gekennzeichnet, dass das Führungsrohr (5) im axialen Messstellenbereich (X) aussen radial auf 0.1 - 2,0 mm verjüngt ist.
- Pneumatisches Schlagwerk nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass das Führungsrohr (5) mindestens im axialen Messstellenbereich (X) aus nichtferromagnetischem Material besteht.
- Pneumatisches Schlagwerk nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Sensor (3) mit einer Recheneinheit (6) zur Ermittlung einer Position und/oder Geschwindigkeit des Flugkolbens (2) aus dem zeitlichen Verlauf des Sensorsignals verbunden ist.
- Pneumatisches Schlagwerk nach Anspruch 9, dadurch gekennzeichnet, dass die Recheneinheit (6) bezüglich der Kinematik des Flugkolbens (2) selektiv aktivierbare Klassifikationsmittel aufweist.
- Werkzeugmaschine mit einem pneumatischen Schlagwerk mit einem axial hin- und herbewegten, schlagend beanspruchten Flugkolben (2), dadurch gekennzeichnet, dass das pneumatische Schlagwerk nach einem der vorhergehenden Ansprüche zur Messung der Bewegung des Flugkolbens (2) ausgebildet ist.
- Werkzeugmaschine nach Anspruch 11, dadurch gekennzeichnet, dass die Recheneinheit (6) mit Steuermitteln verbunden ist, welche in Abhängigkeit der aktivierten Klassifikationsmittel entsprechend ansteuerbar sind.
- Werkzeugmaschine nach Anspruch 11 oder 12, dadurch gekennzeichnet, dass die Recheneinheit (6) mit einem Sollwertspeicher verbunden ist, wobei der Sollwertspeicher Daten bezüglich der optimalen Kinematik des Flugkolbens (2) sowie optionalen weiteren Randbedingungen für unterschiedliche zu bearbeitende Materialien beinhaltet.
- Werkzeugmaschine nach einem der Ansprüche 11 bis 13, dadurch gekennzeichnet, dass über die Recheneinheit (6) eine Leerschlagposition des Flugkolbens (2) aus dem Sensorsignal ermittelbar sowie über entsprechende Steuermittel das Schlagwerk deaktivierbar ist.
- Werkzeugmaschine nach einem der Ansprüche 11 bis 13, dadurch gekennzeichnet, dass über die Recheneinheit (6) eine Schlagwerkstemperatur aus dem Sensorsignal ermittelbar sowie über entsprechende Steuermittel das Schlagwerk deaktivierbar ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10219950A DE10219950C1 (de) | 2002-05-03 | 2002-05-03 | Pneumatisches Schlagwerk mit magnetfeldempfindlichen Sensor |
| DE10219950 | 2002-05-03 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1375077A2 true EP1375077A2 (de) | 2004-01-02 |
| EP1375077A3 EP1375077A3 (de) | 2004-02-04 |
| EP1375077B1 EP1375077B1 (de) | 2005-11-16 |
Family
ID=28685335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03405286A Expired - Lifetime EP1375077B1 (de) | 2002-05-03 | 2003-04-23 | Pneumatisches Schlagwerk |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6799644B2 (de) |
| EP (1) | EP1375077B1 (de) |
| JP (1) | JP2003326475A (de) |
| DE (2) | DE10219950C1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1607186A1 (de) * | 2004-06-18 | 2005-12-21 | HILTI Aktiengesellschaft | Elektropneumatischer Bohr-/Meisselhammer mit veränderbarer Schlagenergie |
| WO2013174594A1 (de) * | 2012-05-25 | 2013-11-28 | Robert Bosch Gmbh | Schlagwerkeinheit |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE527067C2 (sv) * | 2003-12-01 | 2005-12-13 | Atlas Copco Tools Ab | Impulsmutterdragare med vinkelavkännande organ |
| US7273998B2 (en) * | 2004-09-15 | 2007-09-25 | General Electric Company | System and method for monitoring laser shock processing |
| EP1674205B1 (de) * | 2004-12-23 | 2014-03-19 | Black & Decker Inc. | Antriebsmechanismus für ein Kraftwerkzeug |
| DE102005019095A1 (de) * | 2005-04-25 | 2006-10-26 | Ott Messtechnik Gmbh & Co. Kg | Längenmessgerät |
| DE102007000488A1 (de) * | 2007-09-12 | 2009-03-19 | Hilti Aktiengesellschaft | Handwerkzeugmaschine mit Luftfederschlagswerk, Linearmotor und Steuerverfahren |
| DE102007060909B8 (de) * | 2007-12-14 | 2013-05-02 | DYNATEC GmbH | Fluidbetriebenes Bearbeitungswerkzeug |
| DE102007060911A1 (de) * | 2007-12-14 | 2009-06-18 | DYNATEC Gesellschaft für CAE und Dynamik mbH | Bearbeitungswerkzeug |
| AU2009232467B2 (en) * | 2008-03-31 | 2014-11-20 | Atlas Copco Airpower, Naamloze Venootschap | Percussion tool |
| US20110128014A1 (en) * | 2008-06-05 | 2011-06-02 | Martin Roy Harrison | Position sensor |
| EP2282871B1 (de) * | 2008-06-05 | 2016-03-23 | Atlas Copco Rock Drills AB | Vorrichtung und verfahren zur erfassung eines parameters in bezug auf die position eines verschiebbaren elements in einem steinbohrer |
| ATE527083T1 (de) * | 2009-01-30 | 2011-10-15 | Hilti Ag | Pneumatisches schlagwerk |
| DE102009026542A1 (de) * | 2009-05-28 | 2010-12-09 | Hilti Aktiengesellschaft | Werkzeugmaschine |
| GB0912283D0 (en) | 2009-07-15 | 2009-08-26 | Black & Decker Inc | Motor driven hammer having means for controlling the power of impact |
| JP5374331B2 (ja) * | 2009-11-25 | 2013-12-25 | パナソニック株式会社 | 回転工具 |
| DE102012208855A1 (de) * | 2012-05-25 | 2013-11-28 | Robert Bosch Gmbh | Handwerkzeugmaschine |
| DE102012208913A1 (de) * | 2012-05-25 | 2013-11-28 | Robert Bosch Gmbh | Schlagwerkeinheit |
| US20150202758A1 (en) * | 2012-05-25 | 2015-07-23 | Rainer Nitsche | Percussion Unit |
| US9416593B2 (en) | 2012-12-28 | 2016-08-16 | Smith International, Inc. | Piston strike face and bit interface for percussion hammer drill |
| EP2811110B1 (de) * | 2013-06-07 | 2017-09-20 | Sandvik Mining and Construction Oy | Anordnung und Verfahren beim Aufbrechen von Gestein |
| US10190604B2 (en) | 2015-10-22 | 2019-01-29 | Caterpillar Inc. | Piston and magnetic bearing for hydraulic hammer |
| WO2017120165A1 (en) * | 2016-01-05 | 2017-07-13 | Milwaukee Electric Tool Corporation | Vibration reduction system and method for power tools |
| EP4056321A1 (de) * | 2016-02-25 | 2022-09-14 | Milwaukee Electric Tool Corporation | Elektrowerkzeug mit einem ausgangspositionssensor |
| EP3266975B1 (de) * | 2016-07-07 | 2019-01-30 | Sandvik Mining and Construction Oy | Bauteil für felsabbausystem |
| US10814468B2 (en) | 2017-10-20 | 2020-10-27 | Milwaukee Electric Tool Corporation | Percussion tool |
| CN214723936U (zh) | 2018-01-26 | 2021-11-16 | 米沃奇电动工具公司 | 冲击工具 |
| EP3608063A1 (de) * | 2018-08-07 | 2020-02-12 | Hilti Aktiengesellschaft | Handwerkzeugmaschine und verfahren zum betreiben einer handwerkzeugmaschine |
| WO2021202968A1 (en) * | 2020-04-02 | 2021-10-07 | Milwaukee Electric Tool Corporation | Power tool |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2882516A (en) * | 1952-10-29 | 1959-04-14 | Frederic W Olmstead | Record sensing system |
| US3464503A (en) * | 1968-06-25 | 1969-09-02 | Black & Decker Mfg Co | Measuring device for impact tool |
| US4109475A (en) * | 1974-12-10 | 1978-08-29 | Van Kooten B.V. | Pile-driving ram and method of controlling the same |
| DE3210716A1 (de) * | 1981-03-24 | 1982-11-11 | Toshiba Kikai K.K., Tokyo | Metallmessstab und verfahren zu seiner herstellung |
| DE3137951C2 (de) * | 1981-09-24 | 1985-10-17 | Gewerkschaft Eisenhütte Westfalia, 4670 Lünen | Hydraulisches Schubkolbengetriebe, insbesondere zur Verwendung als Rück- und Schreitzylinder in untertägigen Gewinnungsbetrieben, mit an der Kolbenstange angeordneten Permanentmagneten |
| US4510371A (en) * | 1982-03-18 | 1985-04-09 | Toshiba Kikai Kabushiki Kaisha | Metallic scales and method of manufacturing the same |
| DE4211616A1 (de) * | 1992-04-07 | 1993-10-14 | Bosch Gmbh Robert | Meßvorrichtung zur Bestimmung eines Drehwinkels |
| DE19510964A1 (de) * | 1995-03-24 | 1996-09-26 | Hilti Ag | Handgerät zur trockenen materialabtragenden Bearbeitung von spröden und/oder duktil versagenden Bauteilen und Adapter für ein Hammerbohrgerät |
| DE19753776A1 (de) * | 1997-12-04 | 1999-06-10 | Bosch Gmbh Robert | Meßvorrichtung zur berührungslosen Erfassung eines Drehwinkels |
| DE19852915A1 (de) * | 1998-11-17 | 2000-05-31 | Bosch Gmbh Robert | Meßvorrichtung zur berührungslosen Erfassung eines Drehwinkels |
| US6253460B1 (en) * | 1999-06-10 | 2001-07-03 | Geoffrey W. Schmitz | Apparatus for position measurement and a system and a method for using the same |
| DE19956313A1 (de) * | 1999-11-12 | 2001-05-23 | Atecs Mannesmann Ag | Magnetfeldsensor zur Ermittlung der Position eines beweglichen Objekts |
| US6411081B1 (en) * | 2000-02-10 | 2002-06-25 | Siemens Ag | Linear position sensor using magnetic fields |
| US6367337B1 (en) * | 2000-05-03 | 2002-04-09 | Cts Corporation | Non-contacting sensor for measuring relative displacement between two rotating shafts |
| JP2002156245A (ja) * | 2000-11-20 | 2002-05-31 | Aisin Seiki Co Ltd | 非接触式変位センサ |
-
2002
- 2002-05-03 DE DE10219950A patent/DE10219950C1/de not_active Expired - Fee Related
-
2003
- 2003-04-23 DE DE50301651T patent/DE50301651D1/de not_active Expired - Lifetime
- 2003-04-23 EP EP03405286A patent/EP1375077B1/de not_active Expired - Lifetime
- 2003-05-01 US US10/427,346 patent/US6799644B2/en not_active Expired - Lifetime
- 2003-05-06 JP JP2003128130A patent/JP2003326475A/ja active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1607186A1 (de) * | 2004-06-18 | 2005-12-21 | HILTI Aktiengesellschaft | Elektropneumatischer Bohr-/Meisselhammer mit veränderbarer Schlagenergie |
| WO2013174594A1 (de) * | 2012-05-25 | 2013-11-28 | Robert Bosch Gmbh | Schlagwerkeinheit |
| CN104334316A (zh) * | 2012-05-25 | 2015-02-04 | 罗伯特·博世有限公司 | 冲击机构单元 |
| US10350742B2 (en) | 2012-05-25 | 2019-07-16 | Robert Bosch Gmbh | Percussion unit |
Also Published As
| Publication number | Publication date |
|---|---|
| US20030205393A1 (en) | 2003-11-06 |
| EP1375077B1 (de) | 2005-11-16 |
| DE50301651D1 (de) | 2005-12-22 |
| DE10219950C1 (de) | 2003-10-30 |
| US6799644B2 (en) | 2004-10-05 |
| EP1375077A3 (de) | 2004-02-04 |
| JP2003326475A (ja) | 2003-11-18 |
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