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EP0445636B1 - Electrically operated hammer - Google Patents

Electrically operated hammer Download PDF

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Publication number
EP0445636B1
EP0445636B1 EP91102887A EP91102887A EP0445636B1 EP 0445636 B1 EP0445636 B1 EP 0445636B1 EP 91102887 A EP91102887 A EP 91102887A EP 91102887 A EP91102887 A EP 91102887A EP 0445636 B1 EP0445636 B1 EP 0445636B1
Authority
EP
European Patent Office
Prior art keywords
handle
linkage
hand tool
tool according
switching latch
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
EP91102887A
Other languages
German (de)
French (fr)
Other versions
EP0445636A1 (en
Inventor
Ulrich Dipl.-Ing. Mütschele
Karl Dr. Ing. Wanner
Johann Kaltenecker
Gerhard Meixner
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0445636A1 publication Critical patent/EP0445636A1/en
Application granted granted Critical
Publication of EP0445636B1 publication Critical patent/EP0445636B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/04—Cases; Covers
    • H01H21/10—Casing of switch constituted by a handle serving a purpose other than the actuation of the switch
    • 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
    • B25D17/04—Handles; Handle mountings

Definitions

  • the invention relates to an electrically operated hand tool according to the preamble of claim 1.
  • a rotary hammer which has a closed handle and a switch arranged therein with a handle having. This means that the electrical lines from the switch to the motor must be passed through the handle. The power cord is also inserted into the handle.
  • This widespread design requires a lot of installation work for the cabling.
  • the hammer falls and is hit hard, there is a risk that the sensitive grip area will be damaged and live cables will subsequently be exposed. This can pose dangers to the operator.
  • the hand tool according to the invention with the characterizing features of claim 1 has the advantage that the manufacturing and assembly costs are significantly reduced.
  • the provision of a resilient connecting element between the pawl and linkage enables a simple articulated connection with an integral design of the pawl, linkage and connecting element.
  • Figure 1 shows a hammer in partial section
  • Figure 2 shows a cross section along line II-II in Figure 1.
  • a hammer drill 1 has a housing 2 made of plastic, which has a cylindrical housing part in which a motor 3 is housed. Furthermore, a striking mechanism 4, which is only indicated in the drawing, is contained in the housing 2 perpendicular to the motor 3. In an extension of the striking mechanism 4, a tool holder 5 with a drilling tool 6 is arranged in a manner known per se. At the end of the hammer opposite the tool holder, a handle 7 is fastened to the housing 2 with screws 8.
  • the handle 7 has the shape of a spade handle and consists of a frame 9 made of plastic, which has a substantially U-shaped cross section (see FIG. 2).
  • the handle 7 has webs 10 and a central web 11.
  • the handle 7 has in its grip part 12 gripped by the hand of the operator and in the upper web 10 and the central web 11 a circumferential central groove 13 which faces the housing 2.
  • the scaffold 9 is provided with an easily accessible elastic sheath 14, e.g. B. enclosed a foam material.
  • the whole handle 7 consists of an undivided solid part.
  • the webs 10, 11 form an upper 15 and a lower handle opening 16 for holding with both hands, so that a so-called double spade handle is created.
  • the handle openings 15, 16 are closed by a wall 17 facing the housing 2.
  • a closed frame 18 is inserted, which can be made of plastic or sheet metal.
  • the frame In the area of the grip part 12, the frame consists of 2 parallel tabs 19 and 20 which rest in the walls of the groove 13.
  • the two tabs 19, 20 each have a bore 21, 22 on the opposite side.
  • the tabs 19, 20 At the ends facing the handle part 12, the tabs 19, 20 each have an insertion slope 23, 24 on their inner side opposite each other.
  • the switching pawl 26 has two opposite pins 27, 28 which engage in the bores 21, 22 and thus form a pivot bearing for the switching pawl designed as a two-armed lever.
  • a manually operable actuating part 29 is arranged above the pins 27, 28.
  • a trigger part 30 with a free end 31 is formed below the pins 27, 28.
  • a resilient connecting element 32 runs parallel to the lever and is integrally connected to a linkage 34.
  • the linkage 34 runs in the central web 11 and has a contact piece 35 which bears against the free end 31.
  • the front end 36 of the linkage 34 is connected to a switch 37 for switching the hammer drill 1 on and off.
  • the linkage 34 and the contact piece 35 together with the free end 31 form means for transmitting the actuating force exerted on the pawl 26 to the switch 37.
  • This is housed outside of the handle 7 in or on the housing 2 of the hammer drill, advantageously in particular in the space between the handle 7 and the housing 2.
  • the switch 37 can also be attached to the wall 17 of the handle 7 facing the housing 2.
  • the switch 37 is designed as a non-latching pressure switch and is connected to a connecting cable 38 inserted into the housing 2.
  • the pawl and the linkage 34 firmly connected to it are first pressed in in the direction of arrow A, that is to say from the outside, between the tabs 19, 20 of the frame 18.
  • the pins 27, 28 slide over the insertion bevel 23, 24 until they snap into the bores 21, 22.
  • the frame 18 is inserted with the pawl 26 mounted in the direction of arrow B into the groove 13 of the handle 7.
  • the frame 18 closes the groove 13 in the connecting webs 10, 11.
  • the actuating part 29 is inserted into the groove 13 in the grip part 12.
  • the completely preassembled handle 7 is now attached to the housing 2 by means of the screws 8 screwed on.
  • the linkage 34 comes to lie exactly in front of the switch 37, so that the switch can be operated correctly.
  • the force is transmitted via the trigger part 30 to the free end 31 and from there passed on via the contact piece 35 to the linkage 34 acting as a push rod.
  • the free end 31 and the contact piece 35 are not rigidly coupled but are displaceable relative to one another, so that the rotary movement of the pawl 26 is transmitted without problems to the longitudinal movement of the linkage 34.
  • the cohesion of the pawl 26 and linkage 34 is brought about by the connecting element 32 which is integral with both parts.
  • the invention is not limited to the exemplary embodiment described.
  • the pawl can also be pushed in with longitudinal guides in the frame arranged in the handle instead of being rotatable.
  • the invention is also applicable to other power tools such as drills or screwdrivers.

Landscapes

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

Description

Die Erfindung geht aus von einer elektrisch betriebenen Handwerkzeugmaschine nach der Gattung des Anspruchs 1. Aus der DE-OS 34 04 962 (=GB-PS 21 53 735) ist bereits ein Bohrhammer bekannt, der einen geschlossenen Handgriff und einen darin angeordneten Schalter mit Handhabe aufweist. Dies bringt es mit sich, daß die elektrischen Leitungen von dem Schalter zum Motor durch den Handgriff hindurchgeführt werden müssen. Auch die Netzanschlußleitung ist in den Handgriff eingeführt. Diese weitverbreitete Konstruktion erfordert einen hohen Montageaufwand bei der Verkabelung. Außerdem besteht beim Herabfallen und harten Aufschlagen des Hammers die Gefahr, daß der empfindliche Griffbereich beschädigt wird und anschließend spannungsführende Leitungen freiliegen. Davon können Gefahren für die Bedienperson ausgehen.The invention relates to an electrically operated hand tool according to the preamble of claim 1. From DE-OS 34 04 962 (= GB-PS 21 53 735) a rotary hammer is already known which has a closed handle and a switch arranged therein with a handle having. This means that the electrical lines from the switch to the motor must be passed through the handle. The power cord is also inserted into the handle. This widespread design requires a lot of installation work for the cabling. In addition, if the hammer falls and is hit hard, there is a risk that the sensitive grip area will be damaged and live cables will subsequently be exposed. This can pose dangers to the operator.

Weiterhin ist bekannt (DE 36 10 682 A1), einen Handgriff einer Handwerkzeugmaschine als Schaltklinke auszubilden, mittels der ein Schalter über ein Gestänge betätigbar ist. Der Schalter ist im Gehäuse der Handwerkzeugmaschine untergebracht, so daß spannungsführende Leitungen zum Handgriff entfallen. Nachteilig ist dabei, daß der Handgriff dem Bediener infolge seiner Verstellbarkeit keinen festen Halt gibt. Darüber hinaus ist zur Übertragung der Schaltbewegung eine Mehrzahl von Bauteilen erforderlich, was einen hohen Fertigungs- und Montageaufwand mit sich bringt.Furthermore, it is known (DE 36 10 682 A1) to design a handle of a hand tool as a pawl, by means of which a switch can be actuated via a linkage. The switch is housed in the housing of the hand power tool, so that live cables to the handle are not required. The disadvantage here is that the handle does not give the operator a firm hold due to its adjustability. In addition, a plurality of components are required for the transmission of the switching movement, which entails a high outlay in terms of production and assembly.

Die erfindungsgemäße Handwerkzeugmaschine mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß der Fertigungs- und Montageaufwand erheblich verringert wird. Das Vorsehen eines federnden Verbindungselementes zwischen Schaltklinke und Gestänge ermöglicht eine einfache Gelenkverbindung bei einstückiger Ausbildung von Schaltklinke, Gestänge und Verbindungselement.The hand tool according to the invention with the characterizing features of claim 1 has the advantage that the manufacturing and assembly costs are significantly reduced. The provision of a resilient connecting element between the pawl and linkage enables a simple articulated connection with an integral design of the pawl, linkage and connecting element.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Anspruch 1 angegebenen Handwerkzeugmaschine möglich.The measures listed in the subclaims enable advantageous developments and improvements of the hand-held power tool specified in claim 1.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Figur 1 zeigt einen Hammer im Teilschnitt und Figur 2 einen Querschnitt gemäß Linie II-II in Figur 1.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. Figure 1 shows a hammer in partial section and Figure 2 shows a cross section along line II-II in Figure 1.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Ein Bohrhammer 1 hat ein Gehäuse 2 aus Kunststoff, das einen zylindrischen Gehäuseteil aufweist, in dem ein Motor 3 untergebracht ist. Weiter ist in dem Gehäuse 2 senkrecht zum Motor 3 ein in der Zeichnung nur angedeutetes Schlagwerk 4 enthalten. In Verlängerung des Schlagwerks 4 ist in an sich bekannter Weise eine Werkzeugaufnahme 5 mit Bohrwerkzeug 6 angeordnet. Am der Werkzeugaufnahme gegenüberliegenden Ende des Hammers ist an das Gehäuse 2 ein Handgriff 7 mit Schrauben 8 befestigt. Der Handgriff 7 hat die Form eines Spatenhandgriffs und besteht aus einem Gerüst 9 aus Kunststoff, das im Querschnitt im wesentliche U-förmige Form hat (vgl. Figur 2). Der Handgriff 7 weist Stege 10 und einen Mittelsteg 11 auf. Der Handgriff 7 weist in seinem von der Hand der Bedienungsperson umgriffenen Griffteil 12 sowie in dem oberen Steg 10 und dem Mittelsteg 11 eine umlaufende mittige Nut 13 auf, die dem Gehäuse 2 zugewandt ist. Das Gerüst 9 ist mit einer griffgünstig geformten elastischen Ummantelung 14, z. B. einem Schaummaterial umschlossen. Der ganze Handgriff 7 besteht aus einem nicht geteilten massiven Teil. Durch die Stege 10, 11 ist eine obere 15 und eine untere Grifföffnung 16 zum beidhändigen Halten ausgebildet, sodaß ein sogenannter Doppelspatengriff entsteht. Die Grifföffnungen 15, 16 werden durch eine dem Gehäuse 2 zugewandte Wandung 17 abgeschlossen.A hammer drill 1 has a housing 2 made of plastic, which has a cylindrical housing part in which a motor 3 is housed. Furthermore, a striking mechanism 4, which is only indicated in the drawing, is contained in the housing 2 perpendicular to the motor 3. In an extension of the striking mechanism 4, a tool holder 5 with a drilling tool 6 is arranged in a manner known per se. At the end of the hammer opposite the tool holder, a handle 7 is fastened to the housing 2 with screws 8. The handle 7 has the shape of a spade handle and consists of a frame 9 made of plastic, which has a substantially U-shaped cross section (see FIG. 2). The handle 7 has webs 10 and a central web 11. The handle 7 has in its grip part 12 gripped by the hand of the operator and in the upper web 10 and the central web 11 a circumferential central groove 13 which faces the housing 2. The scaffold 9 is provided with an easily accessible elastic sheath 14, e.g. B. enclosed a foam material. The whole handle 7 consists of an undivided solid part. The webs 10, 11 form an upper 15 and a lower handle opening 16 for holding with both hands, so that a so-called double spade handle is created. The handle openings 15, 16 are closed by a wall 17 facing the housing 2.

In die Nut 13 des Handgriffs 7 ist ein geschlossener Rahmen 18 eingesetzt, der aus Kunststoff oder Blech bestehen kann. Im Bereich des Griffteils 12 besteht der Rahmen aus 2 parallelen, in den Wandungen der Nut 13 anliegenden Lappen 19 und 20. Die beiden Lappen 19, 20 weisen gegenüberliegend jeweils eine Bohrung 21, 22 auf. An den dem Griffteil 12 zugewandten Enden haben die Lappen 19, 20 an ihrer Innenseite gegenüberliegend jeweils eine Einführschräge 23, 24.In the groove 13 of the handle 7, a closed frame 18 is inserted, which can be made of plastic or sheet metal. In the area of the grip part 12, the frame consists of 2 parallel tabs 19 and 20 which rest in the walls of the groove 13. The two tabs 19, 20 each have a bore 21, 22 on the opposite side. At the ends facing the handle part 12, the tabs 19, 20 each have an insertion slope 23, 24 on their inner side opposite each other.

Zwischen den Lappen 19, 20, also in dem Griffteil 12 ist eine Schaltklinke 26, vorzugsweise aus Kunststoff angeordnet. Die Schaltklinke 26 weist zwei gegenüberliegende Zapfen 27, 28 auf, die in die Bohrungen 21, 22 eingreifen und damit ein Drehlager für die als zweiarmiger Hebel ausgeführte Schaltklinke bilden. Oberhalb der Zapfen 27, 28 ist ein von Hand bedienbares Betätigungsteil 29 angeordnet. Unterhalb der Zapfen 27, 28 ist ein Auslöseteil 30 mit einem freien Ende 31 ausgebildet. Parallel zu dem Hebel verläuft ein federndes Verbindungselement 32, das mit einem Gestänge 34 einstückig verbunden ist. Das Gestänge 34 verläuft in dem Mittelsteg 11 und weist ein Anlagestück 35 auf, das an dem freien Ende 31 anliegt. Das vordere Ende 36 des Gestänges 34 steht in Verbindung mit einem Schalter 37 zum Ein- und Ausschalten des Bohrhammers 1. Das Gestänge 34 und das Anlagestück 35 bilden zusammen mit dem freien Ende 31 Mittel zur Übertragung der auf die Schaltklinke 26 ausgeübten Betätigungskraft auf den Schalter 37. Dieser ist außerhalb des Handgriffs 7 im oder auf dem Gehäuse 2 des Bohrhammers, vorteilhaft insbesondere in dem Raum zwischen dem Handgriff 7 und dem Gehäuse 2, untergebracht. Der Schalter 37 kann auch an der dem Gehäuse 2 zu gerichteten Wandung 17 des Handgriffs 7 befestigt sein. Der Schalter 37 ist als nicht rastender Druckschalter ausgebildet und mit einem in das Gehäuse 2 eingeführten Anschlußkabel 38 verbunden.A switching pawl 26, preferably made of plastic, is arranged between the tabs 19, 20, that is to say in the handle part 12. The switching pawl 26 has two opposite pins 27, 28 which engage in the bores 21, 22 and thus form a pivot bearing for the switching pawl designed as a two-armed lever. A manually operable actuating part 29 is arranged above the pins 27, 28. A trigger part 30 with a free end 31 is formed below the pins 27, 28. A resilient connecting element 32 runs parallel to the lever and is integrally connected to a linkage 34. The linkage 34 runs in the central web 11 and has a contact piece 35 which bears against the free end 31. The front end 36 of the linkage 34 is connected to a switch 37 for switching the hammer drill 1 on and off. The linkage 34 and the contact piece 35 together with the free end 31 form means for transmitting the actuating force exerted on the pawl 26 to the switch 37. This is housed outside of the handle 7 in or on the housing 2 of the hammer drill, advantageously in particular in the space between the handle 7 and the housing 2. The switch 37 can also be attached to the wall 17 of the handle 7 facing the housing 2. The switch 37 is designed as a non-latching pressure switch and is connected to a connecting cable 38 inserted into the housing 2.

Bei der Montage des Bohrhammers 1 wird zunächst die Schaltklinke und das damit fest verbundene Gestänge 34 in Pfeilrichtung A, also von außen zwischen die Lappen 19, 20 des Rahmens 18 eingedrückt. Dabei gleiten die Zapfen 27, 28 über die Einführschräge 23, 24 bis sie in den Bohrungen 21, 22 einschnappen. Anschließend wird der Rahmen 18 mit montierter Schaltklinke 26 in Pfeilrichtung B in die Nut 13 des Handgriffs 7 eingeschoben. Der Rahmen 18 verschließt dabei die Nut 13 in den Verbindungsstegen 10, 11. Im Griffteil 12 ist das Betätigungsteil 29 in die Nut 13 eingesetzt. In diesem Zustand wird nun der komplett vormontierte Handgriff 7 an das Gehäuse 2 mittels der Schrauben 8 angeschraubt. Dabei kommt das Gestänge 34 genau vor dem Schalter 37 zu liegen, so daß eine einwandfreie Betätigung des Schalters ermöglicht ist. Beim Betätigen der Schaltklinke 26 wird die Kraft über den Auslöseteil 30 auf das freie Ende 31 übertragen und von dort über das Anlagestück 35 auf das als Druckstange wirkende Gestänge 34 weitergegeben. Freies Ende 31 und Anlagestück 35 sind nicht starr gekoppelt sondern gegeneinander verschieblich, so daß die Drehbewegung der Schaltklinke 26 problemlos auf die Längsbewegung des Gestänges 34 übertragen wird. Den Zusammenhalt von Schaltklinke 26 und Gestänge 34 bewirkt das mit beiden Teilen einstückige Verbindungselement 32.When assembling the rotary hammer 1, the pawl and the linkage 34 firmly connected to it are first pressed in in the direction of arrow A, that is to say from the outside, between the tabs 19, 20 of the frame 18. The pins 27, 28 slide over the insertion bevel 23, 24 until they snap into the bores 21, 22. Then the frame 18 is inserted with the pawl 26 mounted in the direction of arrow B into the groove 13 of the handle 7. The frame 18 closes the groove 13 in the connecting webs 10, 11. The actuating part 29 is inserted into the groove 13 in the grip part 12. In this state, the completely preassembled handle 7 is now attached to the housing 2 by means of the screws 8 screwed on. Here, the linkage 34 comes to lie exactly in front of the switch 37, so that the switch can be operated correctly. When the pawl 26 is actuated, the force is transmitted via the trigger part 30 to the free end 31 and from there passed on via the contact piece 35 to the linkage 34 acting as a push rod. The free end 31 and the contact piece 35 are not rigidly coupled but are displaceable relative to one another, so that the rotary movement of the pawl 26 is transmitted without problems to the longitudinal movement of the linkage 34. The cohesion of the pawl 26 and linkage 34 is brought about by the connecting element 32 which is integral with both parts.

Die Erfindung beschränkt sich nicht auf das beschriebene Ausführungsbeispiel. So kann die Schaltklinke statt drehbar auch längsverschieblich eindrückbar sein mit Längsführungen in dem in Handgriff angeordneten Rahmen. Die Erfindung ist auch auf andere Elektrowerkzeuge wie zum Beispiel Bohrmaschinen oder Schrauber anwendbar.The invention is not limited to the exemplary embodiment described. For example, the pawl can also be pushed in with longitudinal guides in the frame arranged in the handle instead of being rotatable. The invention is also applicable to other power tools such as drills or screwdrivers.

Claims (7)

  1. Electrically driven power hand tool, in particular hammer drill, having a housing (2) in which a motor (3) is arranged and having a handle (7) which is connected to the housing (2) and is provided with a switching latch (26) for actuating an electrical switch (37) for switching the motor (3) on and off, the switch (37) being fitted in the region of the housing (2) on the other side of a handle opening (15, 16) of the handle (7) and a linkage (34) being provided for power transmission from the switching latch (26) to the switch (37), characterized in that the switching latch (26) is designed as two-armed lever which has as first lever arm an actuating part (29) and as second lever arm a triggering part (30), in that a free end (31) of the triggering part (30) interacts with a bearing piece (35) of the linkage (34), and in that the switching latch (26) and the linkage (34) are coupled by a resilient connecting element (32), the switching latch (26), linkage (34), and connecting element (32) consisting of plastic and being of integral construction.
  2. Power hand tool according to Claim 1, characterized in that the switching latch (26) is rotatably mounted in a handle part (12) of the handle (7) and the linkage (34) is arranged in a web (10) so as to be longitudinally displaceable.
  3. Power hand tool according to Claim 1, characterized in that the handle (7) is constructed as double-spade handle having a central web (11) in which the linkage (34) is accommodated.
  4. Power hand tool according to one of the preceding claims, characterized in that the switching latch (26), linkage (34), and connecting element (32) are arranged in a frame (18) which can be inserted in the handle (7).
  5. Power hand tool according to Claim 4, characterized in that the handle (7) is of solid construction and has a groove (13), open in the direction of the handle opening (15, 16), for accommodating the frame (18).
  6. Power hand tool according to Claim 4, characterized in that the switching latch (26) is provided with pins (27, 28) which engage in holes (21, 22) in the frame (18).
  7. Power hand tool according to one of the preceding claims, characterized in that the handle (7) is provided with an elastic coating (14) which is shaped so as to be easy to handle.
EP91102887A 1990-03-03 1991-02-28 Electrically operated hammer Expired - Lifetime EP0445636B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4006721A DE4006721A1 (en) 1990-03-03 1990-03-03 ELECTRICALLY POWERED HAMMER
DE4006721 1990-03-03

Publications (2)

Publication Number Publication Date
EP0445636A1 EP0445636A1 (en) 1991-09-11
EP0445636B1 true EP0445636B1 (en) 1995-01-18

Family

ID=6401360

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91102887A Expired - Lifetime EP0445636B1 (en) 1990-03-03 1991-02-28 Electrically operated hammer

Country Status (2)

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EP (1) EP0445636B1 (en)
DE (2) DE4006721A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7138595B2 (en) 2004-04-02 2006-11-21 Black & Decker Inc. Trigger configuration for a power tool

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201015860Y (en) * 2004-04-02 2008-02-06 布莱克和戴克公司 Power tool with a driver

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB142922A (en) * 1919-02-12 1920-05-12 Alexander George Slade Improvements in or relating to percussive pneumatic hand tools
DE2839545A1 (en) * 1978-09-12 1980-03-20 Maco Meudon Sa Valve for pneumatic drill - has inset trigger displacing piston rod which pivots conical plug located in air feed pipe
IT7922984U1 (en) * 1979-10-29 1981-04-29 Star Utensili Elett S P A PORTABLE POWER TOOL WITH REFINED CONTROLS.
DE3404962A1 (en) * 1984-02-11 1985-08-14 Robert Bosch Gmbh, 7000 Stuttgart HANDLE FOR DRILLING MACHINES AND / OR DRILLING HAMMER
DE3610682C2 (en) * 1986-03-29 1994-01-13 Bosch Gmbh Robert Handle for hand machine tools
GB2230728B (en) * 1989-04-17 1992-10-21 Kioritz Corp Engine hammer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7138595B2 (en) 2004-04-02 2006-11-21 Black & Decker Inc. Trigger configuration for a power tool

Also Published As

Publication number Publication date
DE59104279D1 (en) 1995-03-02
EP0445636A1 (en) 1991-09-11
DE4006721A1 (en) 1991-09-19

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