EP1226903B1 - Electric hand tool with idle running switch off - Google Patents

Electric hand tool with idle running switch off Download PDF

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Publication number
EP1226903B1
EP1226903B1 EP02405018.9A EP02405018A EP1226903B1 EP 1226903 B1 EP1226903 B1 EP 1226903B1 EP 02405018 A EP02405018 A EP 02405018A EP 1226903 B1 EP1226903 B1 EP 1226903B1
Authority
EP
European Patent Office
Prior art keywords
guide tube
electric hand
hand tool
air channel
anvil
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.)
Expired - Lifetime
Application number
EP02405018.9A
Other languages
German (de)
French (fr)
Other versions
EP1226903A2 (en
EP1226903A3 (en
Inventor
Uto Plank
Martin Richter
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP1226903A2 publication Critical patent/EP1226903A2/en
Publication of EP1226903A3 publication Critical patent/EP1226903A3/en
Application granted granted Critical
Publication of EP1226903B1 publication Critical patent/EP1226903B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/005—Arrangements for adjusting the stroke of the impulse member or for stopping the impact action when the tool is lifted from the working surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/12—Means for driving the impulse member comprising a crank mechanism
    • B25D11/125—Means for driving the impulse member comprising a crank mechanism with a fluid cushion between the crank drive and the striking body
    • 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
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/035—Bleeding holes, e.g. in piston guide-sleeves

Definitions

  • the invention relates to an at least partially striking electric hand tool according to the preamble of claim 1, for example.
  • Such a hand-held power tool is off DE 196 21 057 A1 known.
  • Electric hand tool devices with pneumatic percussion use to generate the shock a reciprocating oscillating motion, which is applied to a gas spring between a sealing in a guide tube relative to this movable exciter piston and a distanced, sealingly movable in the direction of the tool axis, flying piston, which via a Beater strikes the tool axially.
  • the impact is advantageously interrupted in the absence of counter pressure on the axially limited in a tool holder movable tool over a Leerschlagabscnies.
  • an axially delimited air duct is arranged within a guide tube, which connects Stospolster and remindstospolster, depending on the flying-piston position with each other and thus realizes a non-linear system behavior.
  • the gas spring When arranged in the Leerscherposition, directly on the shank of a tool beating, flying pistons, the gas spring is vented through a radial opening in the guide tube. The valve opening is arranged inside or behind the flying piston in the region of the gas spring.
  • a disadvantage is the large Leerweg required for impact shutdown, which leads to a higher weight and greater dust input. In addition is not guaranteed by the over its own weight freely movable air piston, the impact shutdown.
  • the gas spring is vented, including radial, associated with the environment, openings of the open-end hollow cylinder designed as an axially moving exciter piston serve.
  • Radial valve openings in the cylinder jacket of the moving exciter piston are connected at an axially close to the deflection point determined position via an annular channel in the guide tube with axially extending to the outside grooves and thus form an over this valve openings controllable air duct for ventilation of the gas spring. Only in the idling position of the flying piston, the valve openings are open and aerate the gas spring. Otherwise, the valve openings are sealed by a mutual surface contact of the respectively associated lateral surfaces of the cylinder jacket and the flying piston.
  • the object of the invention is to realize a pneumatic percussion mechanism while reducing the wear and the complexity of moving highly loaded components. Another aspect is the safe blanking shutdown.
  • valve opening of the air channel which can be closed by the striker, eliminates the need for complex movable, highly loaded components for blank shutdown, thereby increasing the service life.
  • a safe shutdown is ensured by the pneumatic pressure equalization on both sides of the flying piston.
  • the striker is provided with respect to the end face facing the flying piston with a tapered, flanged central annular groove region which releases the valve opening in an empty space in a gap which is connected to the environment via radial ventilation openings, which further advantageously arranged in front of the axial region of the flying piston are.
  • An annular valve sleeve with radial openings is advantageously arranged within the guide tube between the air duct and the striker, which tapers the air duct up to the valve openings in a radial distance associated with the sealing outer diameter of the striker.
  • the air duct extends axially, outside the inner shell of the guide tube.
  • the air duct is formed with respect to the axially extending part by a groove in the outer shell of the guide tube, which is fitted tightly into a hollow cylindrical forming, elongated tool holder.
  • FIG. 1 has a pneumatic percussion of an electric hand tool, not shown, a gas spring 1, which between a, in a guide tube 2 sealingly movable exciter piston 3 and a distanced, relative to this in the direction of the tool axis A sealingly movable, flying piston 4 is formed.
  • the flying mass 4 is along the tool axis A with an axially movable anvil 5 and this contactable with a tool 6, which is rotatably guided axially limited in a tool holder 7 axially, the sealing outside the guide tube 2 extends.
  • air channel 9 is formed outside the inner shell of, designed as a hollow cylinder, axially fixed guide tube 2 as a groove and a radial aperture 14 connected to the gas spring 1.
  • the valve openings 8 are sealed in a working position arranged in an anvil 5 by this.
  • Fig. 2 are at a arranged in Leerschlagposition anvil 5, the valve openings 8 for ventilation of the gas spring 1 open.
  • the striker 5 is provided with respect to the airfoil 4 facing end face with a tapered, flanged central annular groove portion 10, which in Leerschlagposition the valve opening 8 in a Interspace 11 releases, which is connected to the environment via radial ventilation openings 12, which are arranged in front of the axial region of the flying piston 4.
  • annular valve sleeve 13 is arranged with radial openings 15, which tapers the air channel 9 to the valve openings 8 in a sealing outer diameter of the striker 5 associated radial distance.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Description

Die Erfindung bezeichnet ein zumindest teilweise schlagendes Elektrohandwerkzeuggerät gemäß dem Oberbegriff des Anspruchs 1, bspw. einen Bohrhammer oder einen Meisselhammer, mit Leerschlagabschaltung eines pneumatischen Schlagwerks. Ein solches Elektrohandwerkzeuggerät ist aus DE 196 21 057 A1 bekannt.The invention relates to an at least partially striking electric hand tool according to the preamble of claim 1, for example. A hammer drill or a chisel hammer, with Leerschlagabschaltung a pneumatic percussion. Such a hand-held power tool is off DE 196 21 057 A1 known.

Elektrohandwerkzeuggeräte mit pneumatischem Schlagwerk benutzen zur Erzeugung des Schlages eine hin- und hergehende schwingende Bewegung, welche auf eine Gasfeder zwischen einem in einem Führungsrohr dichtend relativ zu diesem beweglichen Erregerkolben und einem distanzierten, in Richtung der Werkzeugachse dichtend beweglichen, Flugkolben aufgebracht wird, welcher über einen Döpper axial auf das Werkzeug schlägt. Der Schlag wird vorteilhaft bei fehlendem Gegendruck auf das in einer Werkzeugaufnahme axial begrenzt bewegliche Werkzeug über eine Leerschlagabschaltung unterbrochen.Electric hand tool devices with pneumatic percussion use to generate the shock a reciprocating oscillating motion, which is applied to a gas spring between a sealing in a guide tube relative to this movable exciter piston and a distanced, sealingly movable in the direction of the tool axis, flying piston, which via a Beater strikes the tool axially. The impact is advantageously interrupted in the absence of counter pressure on the axially limited in a tool holder movable tool over a Leerschlagabschaltung.

Nach der EP759341A3 wird bei Einnahme einer, durch eine Leerwegvergrösserung ermöglichten, Leerschlagposition des Döppers, zur Leerschlagabschaltung die Gasfeder über eine mittels einer, ausserhalb des Führungsrohres, axial verschiebbaren, gefederten Ventilsteuerhülse gesteuerte radiale Ventilöffnungen zur Umgebung belüftet und somit eine den Schlag erzeugende Druckdifferenz verhindert. Nachteilig bei einer derartigen Lösung sind die dazu erforderlichen Ventilöffnungen und die gefederte Ventilsteuerhülse als hochbelastetes schwingendes Bauteil. Die Federkraft muss zusätzlich durch eine Gegenkraft vom Nutzer kompensiert werden.After EP759341A3 when taking a, made possible by Leerwegvergrösserung, Leerschlagposition the striker, for blank shutdown the gas spring via a, outside of the guide tube, axially displaceable, sprung valve control sleeve controlled radial valve openings vented to the environment and thus prevents the impact generating pressure difference. The disadvantage of such a solution are the necessary valve openings and the spring-loaded valve control sleeve as highly loaded oscillating component. The spring force must additionally be compensated by a counterforce by the user.

Nach der EP0438029 ist innerhalb eines Führungsrohres ein axial begrenzter Luftkanal angeordnet, welcher Stosspolster und Rückstosspolster, abhängig von der Flugkolbenposition miteinander verbindet und somit ein nichtlineares Systemverhalten realisiert. Bei einem in der Leerschlagposition angeordneten, direkt auf den Schaft eines Werkzeugs schlagenden, Flugkolben ist die Gasfeder über eine radiale Öffnung im Führungsrohr belüftet. Die Ventilöffnung ist innerhalb bzw. hinter dem Flugkolben im Bereich der Gasfeder angeordnet. Nachteilig ist der grosse, zur Schlagabschaltung erforderliche Leerweg, welcher zu einem höheren Gewicht und stärkeren Staubeintrag führt. Zudem ist durch den über das Eigengewicht frei beweglichen Flugkolben die Schlagabschaltung nicht sicher gewährleistet.After EP0438029 an axially delimited air duct is arranged within a guide tube, which connects Stospolster and Rückstospolster, depending on the flying-piston position with each other and thus realizes a non-linear system behavior. When arranged in the Leerschlagposition, directly on the shank of a tool beating, flying pistons, the gas spring is vented through a radial opening in the guide tube. The valve opening is arranged inside or behind the flying piston in the region of the gas spring. A disadvantage is the large Leerweg required for impact shutdown, which leads to a higher weight and greater dust input. In addition is not guaranteed by the over its own weight freely movable air piston, the impact shutdown.

Nach der DE4111127 wird zur Abschaltung des Schlages eines pneumatischen Schlagwerks die Gasfeder belüftet, wozu radiale, mit der Umgebung verbundene, Öffnungen des als einseitig offenen Hohlzylinders ausgeführten axial bewegten Erregerkolbens dienen. Radiale Ventilöffnungen im Zylindermantel des bewegten Erregerkolbens stehen an einer axial nahe dem Umlenkpunkt bestimmten Position über einen Ringkanal im Führungsrohr mit sich axial zur Umgebung erstreckenden Nuten in Verbindung und bilden somit einen über diese Ventilöffnungen steuerbaren Luftkanal zur Belüftung der Gasfeder aus. Nur in der Leerschlagposition des Flugkolbens sind die Ventilöffnungen geöffnet und belüften die Gasfeder. Ansonsten sind die Ventilöffnungen durch einen gegenseitigen Flächenkontakt der jeweils zugeordneten Mantelflächen des Zylindermantels und des Flugkolbens dichtend verschlossen. Somit wird direkt durch die Leerschlagposition des Flugkolbens eine Leerschlagabschaltung realisiert. Durch den bezüglich des Flugkolbens nur einseitig erfolgenden Druckausgleich ist insbesondere bei hohen Temperaturschwankungen die Schlagabschaltung nicht sicher gewährleistet.After DE4111127 To shut off the blow of a pneumatic percussion the gas spring is vented, including radial, associated with the environment, openings of the open-end hollow cylinder designed as an axially moving exciter piston serve. Radial valve openings in the cylinder jacket of the moving exciter piston are connected at an axially close to the deflection point determined position via an annular channel in the guide tube with axially extending to the outside grooves and thus form an over this valve openings controllable air duct for ventilation of the gas spring. Only in the idling position of the flying piston, the valve openings are open and aerate the gas spring. Otherwise, the valve openings are sealed by a mutual surface contact of the respectively associated lateral surfaces of the cylinder jacket and the flying piston. Thus, a Leerschlagabschaltung is realized directly by the Leerschlagposition of the flying piston. As a result of the pressure compensation which takes place only on one side with respect to the flying piston, the impact shut-off is not reliably ensured, especially in the case of high temperature fluctuations.

Die Aufgabe der Erfindung besteht in der Realisierung eines pneumatischen Schlagwerks unter Verringerung des Verschleisses und der Komplexität beweglicher hochbelasteter Bauteile. Ein weiterer Aspekt besteht in der sicheren Leerschlagabschaltung.The object of the invention is to realize a pneumatic percussion mechanism while reducing the wear and the complexity of moving highly loaded components. Another aspect is the safe blanking shutdown.

Die Aufgabe wird im wesentlichen durch die Merkmale des unabhängigen Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.The object is essentially achieved by the features of independent claim 1. Advantageous developments emerge from the subclaims.

Im wesentlichen ist ein sich vom axialen Bereich der Gasfeder bis zum axialen Bereich des Döppers erstreckender, über Ventilöffnungen steuerbarer Luftkanal ausserhalb des Innenmantels des, als Hohlzylinder ausgeführten, axial festen Führungsrohres ausgebildet, wobei die Ventilöffnungen zur Belüftung der Gasfeder bei einem in Leerschlagposition angeordneten Döpper offen sind, hingegen bei einem in Arbeitsposition angeordneten Döpper durch diesen dichtend verschlossen sind.Essentially, an axially extending from the axial region of the gas spring to the axial region of the anvil, controllable via valve openings air duct outside the inner shell of, designed as a hollow cylinder, axially fixed guide tube, wherein the valve openings for ventilation of the gas spring at a arranged in Leerschlagposition anvil open are, however, in a working position arranged anvil are sealed by this.

Durch die vom Döpper verschliessbare Ventilöffnung des Luftkanals sind keine komplexen beweglichen hochbelasteten Bauteile zur Leerschlagabschaltung notwendig, wodurch die Lebensdauer erhöht wird. Ein sicheres Abschalten ist durch den pneumatischen Druckausgleich zu beiden Seiten des Flugkolbens sichergestellt.The valve opening of the air channel, which can be closed by the striker, eliminates the need for complex movable, highly loaded components for blank shutdown, thereby increasing the service life. A safe shutdown is ensured by the pneumatic pressure equalization on both sides of the flying piston.

Vorteilhaft ist der Döpper bezüglich der dem Flugkolben zugewandten Stirnseite mit einem verjüngten, flanschartig zentral abgesetzten Ringnutbereich versehen, welcher in Leerschlagposition die Ventilöffnung in einen Zwischenraum freigibt, welcher mit der Umwelt über radiale Belüftungsöffnungen verbunden ist, welche weiter vorteilhaft vor dem axialen Bereich des Flugkolben angeordnet sind.Advantageously, the striker is provided with respect to the end face facing the flying piston with a tapered, flanged central annular groove region which releases the valve opening in an empty space in a gap which is connected to the environment via radial ventilation openings, which further advantageously arranged in front of the axial region of the flying piston are.

Vorteilhaft ist innerhalb des Führungsrohres zwischen dem Luftkanal und dem Döpper eine ringförmige Ventilhülse mit radialen Öffnungen angeordnet, welche den Luftkanal bis zu den Ventilöffnungen in einem dem dichtenden Aussendurchmesser des Döppers zugeordneten radialen Abstand verjüngt.An annular valve sleeve with radial openings is advantageously arranged within the guide tube between the air duct and the striker, which tapers the air duct up to the valve openings in a radial distance associated with the sealing outer diameter of the striker.

Vorteilhaft erstreckt sich der Luftkanal axial, ausserhalb des Innenmantels des Führungsrohres.Advantageously, the air duct extends axially, outside the inner shell of the guide tube.

Vorteilhaft wird der Luftkanal bezüglich des sich axial erstreckenden Teils durch eine Nut im Aussenmantel des Führungsrohres ausgebildet, welches dicht in eine hohlzylindrisch ausbildende, verlängerte Werkzeugaufnahme eingepasst ist.Advantageously, the air duct is formed with respect to the axially extending part by a groove in the outer shell of the guide tube, which is fitted tightly into a hollow cylindrical forming, elongated tool holder.

Die Erfindung wird bezüglich eines vorteilhaften Ausführungsbeispiels näher erläutert mit:

  • Fig. 1 als pneumatischem Schlagwerk inArbeitsstellung.
  • Fig. 2 als pneumatischem Schlagwerk bei Leerschlagabschaltung.
The invention will be explained in more detail with respect to an advantageous embodiment with:
  • Fig. 1 as a pneumatic impact mechanism in working position.
  • Fig. 2 as a pneumatic percussion mechanism with blank stroke deactivation.

Nach Fig. 1 weist ein pneumatisches Schlagwerk eines nicht dargestellten Elektrohandwerkzeuggerätes eine Gasfeder 1 auf, welche zwischen einem, in einem Führungsrohr 2 dichtend beweglichen Erregerkolben 3 und einem distanzierten, relativ zu diesem in Richtung der Werkzeugachse A dichtend beweglichen, Flugkolben 4 ausgebildet ist. Der Flugkolben 4 ist längs der Werkzeugachse A mit einem axial beweglichen Döpper 5 und dieser mit einem Werkzeug 6 kontaktierbar, welches in einer Werkzeugaufnahme 7 drehfest axial begrenzt beweglich geführt ist, die sich dichtend aussen um das Führungsrohr 2 erstreckt. Ein sich vom axialen Bereich der Gasfeder 1 bis zum axialen Bereich des Döppers 5 axial erstreckender, über radiale Ventilöffnungen 8 durch den Döpper 5 steuerbarer, Luftkanal 9 ist ausserhalb des Innenmantels des, als Hohlzylinder ausgeführten, axial festen Führungsrohres 2 als Nut ausgebildet und über einen radialen Durchbruch 14 mit der Gasfeder 1 verbunden. Die Ventilöffnungen 8 sind bei einem in Arbeitsposition angeordneten Döpper 5 durch diesen dichtend verschlossen.To Fig. 1 has a pneumatic percussion of an electric hand tool, not shown, a gas spring 1, which between a, in a guide tube 2 sealingly movable exciter piston 3 and a distanced, relative to this in the direction of the tool axis A sealingly movable, flying piston 4 is formed. The flying mass 4 is along the tool axis A with an axially movable anvil 5 and this contactable with a tool 6, which is rotatably guided axially limited in a tool holder 7 axially, the sealing outside the guide tube 2 extends. An axially extending from the axial region of the gas spring 1 to the axial region of the striker 5, via radial valve openings 8 controllable by the striker 5, air channel 9 is formed outside the inner shell of, designed as a hollow cylinder, axially fixed guide tube 2 as a groove and a radial aperture 14 connected to the gas spring 1. The valve openings 8 are sealed in a working position arranged in an anvil 5 by this.

Nach Fig. 2 sind bei einem in Leerschlagposition angeordneten Döpper 5 die Ventilöffnungen 8 zur Belüftung der Gasfeder 1 offen. Der Döpper 5 ist bezüglich der dem Flugkolben 4 zugewandten Stirnseite mit einem verjüngten, flanschartig zentral abgesetzten Ringnutbereich 10 versehen, welcher in Leerschlagposition die Ventilöffnung 8 in einen Zwischenraum 11 freigibt, welcher mit der Umwelt über radiale Belüftungsöffnungen 12 verbunden ist, welche vor dem axialen Bereich des Flugkolbens 4 angeordnet sind. Innerhalb des Führungsrohres 2 zwischen dem Luftkanal 9 und dem Döpper 5 ist eine ringförmige Ventilhülse 13 mit radialen Öffnungen 15 angeordnet, welche den Luftkanal 9 bis zu den Ventilöffnungen 8 in einem dem dichtenden Aussendurchmesser des Döppers 5 zugeordneten radialen Abstand verjüngt.To Fig. 2 are at a arranged in Leerschlagposition anvil 5, the valve openings 8 for ventilation of the gas spring 1 open. The striker 5 is provided with respect to the airfoil 4 facing end face with a tapered, flanged central annular groove portion 10, which in Leerschlagposition the valve opening 8 in a Interspace 11 releases, which is connected to the environment via radial ventilation openings 12, which are arranged in front of the axial region of the flying piston 4. Within the guide tube 2 between the air duct 9 and the striker 5, an annular valve sleeve 13 is arranged with radial openings 15, which tapers the air channel 9 to the valve openings 8 in a sealing outer diameter of the striker 5 associated radial distance.

Claims (6)

  1. Electric hand tool for generating an at least partially percussive movement of a tool (6), having a pneumatic percussion mechanism, comprising a gas spring (1) in a guide tube (2) and an idle running switch off of the percussion in the event that the axial counter-pressure via the tool (6) is lacking, wherein when idling percussion takes place, a percussion piston (4) and an anvil (5) are positioned in an idling position which enables venting of the gas spring (1) to the surroundings via an opened air channel (9) which extends outside the inner surface of the guide tube (2) and which is controllable via valve openings (8), characterised in that the air channel (9) extends from the axial region of the gas spring (1) to an axial region of the anvil (5) and that the valve openings (8) are closable for venting the gas spring (1) by means of the anvil (5) arranged in a working position.
  2. Electric hand tool according to claim 1, characterised in that the anvil (5) is provided with an annular groove region (10) which is tapered in relation to the end side facing toward the percussion piston (4), wherein, in the idling position, said annular groove region (10) frees up the air channel (9) via the valve opening (8) in an intermediate space (11) which communicates with the surroundings via at least one venting opening (12).
  3. Electric hand tool according to claim 2, characterised in that an annular valve sleeve (13) with radial openings (15) is arranged in the guide tube (2) between the air channel (9) and the anvil (5).
  4. Electric hand tool according to claim 2 or 3, characterised in that the venting opening (12) is arranged before the axial region of the percussion piston (4).
  5. Electric hand tool according to one of the preceding claims, characterised in that the guide tube (2) is configured as an axially fixed hollow cylinder.
  6. Electric hand tool according to one of the preceding claims, characterised in that the air channel (9) extends axially outside the inner surface of the guide tube (2) and that said air channel (9) is provided in relation to the axially extending part by a groove in the outer surface of the guide tube (2) which is fitted in sealing manner into an extended and hollow cylindrically formed tool receptacle (7).
EP02405018.9A 2001-01-24 2002-01-14 Electric hand tool with idle running switch off Expired - Lifetime EP1226903B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10103141A DE10103141A1 (en) 2001-01-24 2001-01-24 Electrical hand tool appliance e.g. hammer drill, has pneumatic striking tool and valve openings sealed off to vent pneumatic spring through riveting header
DE10103141 2001-01-24

Publications (3)

Publication Number Publication Date
EP1226903A2 EP1226903A2 (en) 2002-07-31
EP1226903A3 EP1226903A3 (en) 2009-05-20
EP1226903B1 true EP1226903B1 (en) 2013-07-03

Family

ID=7671601

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02405018.9A Expired - Lifetime EP1226903B1 (en) 2001-01-24 2002-01-14 Electric hand tool with idle running switch off

Country Status (6)

Country Link
US (1) US6467555B2 (en)
EP (1) EP1226903B1 (en)
JP (1) JP4166017B2 (en)
CN (1) CN1289266C (en)
DE (1) DE10103141A1 (en)
ZA (1) ZA200200623B (en)

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EP3181299A1 (en) * 2015-12-15 2017-06-21 HILTI Aktiengesellschaft Percussive handheld machine tool
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Also Published As

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EP1226903A2 (en) 2002-07-31
US6467555B2 (en) 2002-10-22
CN1367067A (en) 2002-09-04
EP1226903A3 (en) 2009-05-20
JP4166017B2 (en) 2008-10-15
JP2002254350A (en) 2002-09-10
ZA200200623B (en) 2002-08-01
DE10103141A1 (en) 2002-07-25
US20020108766A1 (en) 2002-08-15
CN1289266C (en) 2006-12-13

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