EP2087973A1 - Appareil de travail manuel - Google Patents

Appareil de travail manuel Download PDF

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Publication number
EP2087973A1
EP2087973A1 EP20090001476 EP09001476A EP2087973A1 EP 2087973 A1 EP2087973 A1 EP 2087973A1 EP 20090001476 EP20090001476 EP 20090001476 EP 09001476 A EP09001476 A EP 09001476A EP 2087973 A1 EP2087973 A1 EP 2087973A1
Authority
EP
European Patent Office
Prior art keywords
tool according
drive motor
brake
state
braking device
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
Application number
EP20090001476
Other languages
German (de)
English (en)
Other versions
EP2087973B1 (fr
Inventor
Ernst Dr.-Ing. Gorenflo
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.)
Andreas Stihl AG and Co KG
Original Assignee
Andreas Stihl AG and Co KG
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 Andreas Stihl AG and Co KG filed Critical Andreas Stihl AG and Co KG
Publication of EP2087973A1 publication Critical patent/EP2087973A1/fr
Application granted granted Critical
Publication of EP2087973B1 publication Critical patent/EP2087973B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/08—Drives or gearings; Devices for swivelling or tilting the chain saw
    • B27B17/083—Devices for arresting movement of the saw chain
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/10—Safety devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/081—With randomly actuated stopping means
    • Y10T83/086—With sensing of product or product handling means

Definitions

  • the invention relates to a hand-held working device, in particular a motor chain saw, a power cutter, a hedge trimmer, a brushcutter or the like. According to the preamble of claim 1.
  • the drive motor is designed as an electric motor and drives a tool as a drive element via a tool, namely a circulating on a guide rail saw chain.
  • a band brake is provided, which acts on a rotatably connected to the drive shaft brake drum. If the brake device is engaged, so the brake drum so locked against rotation, switching on the electric motor can lead to overloading of the engine or the braking device.
  • the invention has the object of developing a hand-held implement of the generic type such that damage to the implement by misuse of the braking device is avoided.
  • the state of the braking device is detected.
  • the output signal of the sensor is thus at the same time a status signal of the braking device.
  • This status signal is evaluated in a controller and, depending on the status signal, the aggregates of the implement are controlled in such a way that unacceptable operating conditions that damage the implement are avoided.
  • the operational readiness of the drive motor can be switched as a function of the state signal from the controller.
  • a drive motor would be prevented when the brake device is inserted; only when the braking device is released and the Sensor reports this dissolved state of the control, commissioning of the electric chain saw is possible.
  • the status signal can be used to prevent starting of the internal combustion engine when the drive engine and the brake device are released. Only when the braking device is inserted, that is, a movement of the tool is prevented, the drive motor is switched ready, so it can be started.
  • a speed limitation of the drive motor can also be switched on or off. If a centrifugal clutch is arranged between the drive motor and the tool, a speed limitation is selected which is below the engagement speed of the centrifugal clutch. Regardless of the type of drive (internal combustion engine, electric motor), when the brake device is engaged, that is to say the drive element is blocked, the speed limitation is activated so that clutch engagement of the centrifugal clutch is prevented. The user notes that when the brake device is engaged an increase in speed is not possible and will solve the braking device to work with the implement can.
  • the status signal is used to switch an optical and / or acoustic display.
  • This display may be part of an otherwise existing display device of the device itself or its drive motor.
  • the user is displayed via an associated display or the display device of the implement that the braking device is inserted or the braking device is released. According to the displayed operating state, the user can bring about the necessary state of the braking device.
  • the drive motor is not controlled as a main unit, but there are auxiliary units connected, which are necessary for the operation of the implement and / or the drive motor.
  • a lubricating oil pump for the chain oil can be switched to prevent flooding of the lubricating oil groove in the guide rail. Chain oil is then and only then promoted when the braking device is released. Only when the brake device is released can the saw chain circulate in the guide groove of the guide rail.
  • the fuel supply may also be expedient to switch the fuel supply on or off as a function of the state signal. For example, when the braking device is released when the drive motor is stopped, the fuel supply can be blocked in order to prevent starting of the internal combustion engine.
  • starting of the internal combustion engine can be inhibited if the starter of the internal combustion engine is switched on or off as a function of the state signal.
  • a pull starter z. B. be blocked manually or an electric starter off.
  • actuators can be used, which are to be operated electrically or mechanically.
  • z. B. a valve disposed on a cutoff valve of the water supply to the cutting disc to close the valve preferably and to lock the water supply when the braking device is inserted. It may also be advantageous, for. B. to switch a pump for liquid supply depending on the output signal; the pump can z. B. be switched on or off for water supply to the cutting wheel of a cutting grinder.
  • the speed limitation can be done directly by an electronically controlled throttle (electronic gas) or by an electronically controlled throttle or throttle.
  • an electronically controlled throttle or throttle the drive can be changed accordingly to perform a speed limitation.
  • a speed limitation is effected by electronic or mechanical blocking of a throttle lever associated with the throttle lever.
  • the speed limit can be deactivated automatically after a predetermined time after the startup process.
  • the partial representation of the motor chain saw shown Fig. 1 is an example of a hand-held implement, which may also be in the form of a cut-off, a hedge trimmer, a brushcutter or the like.
  • the hand-held implement 10 shown has a drive motor 1, which drives a tool 3 via a rotating drive element 2.
  • the rotating drive element 2 is a clutch drum z.
  • the sprocket not shown, drives a saw chain 4, which rotates on a guide rail 5.
  • the guide rail is clamped between a sprocket cover 6 and a housing 7 of the motor chain saw.
  • the implement 10 is held over two handles; a rear - in Fig. 2 shown - handle 80 and a front handle bar 8, which engages over the housing 7.
  • the handle bar 8 is preceded by a hand guard 9, which is fixed about an axis 11 pivotally mounted on the housing 7 and serves as a trigger for a braking device 12.
  • the braking device 12 consists of a brake band 13 which is fixed to the housing at one end 13a and fixed to a brake lever 14 at the other end 13b.
  • the brake lever 14 is held pivotably about a housing-fixed axis 15 and coupled to a brake spring 16.
  • the brake lever 14 is in the sense of applying the brake band 13 on the outer circumference 2a of the drive element 2, in the embodiment of a clutch drum, in the direction of arrow 21 subjected to force.
  • the arrangement is such that the drive element 2 rotating in the direction of the arrow 18 has a brake-boosting effect when the brake band 13 is applied, ie. h.,
  • the brake band 13 is tightened in the sense of a reduction in diameter on the brake mantle 2a of the drive element 2.
  • the brake lever 14 is supported via a support lever 19 in the inoperative position of the braking device 12, wherein the Brake band 13 with little clearance a to the brake mantle 2a of the drive element 2 is located.
  • the drive element 2 - driven by the drive shaft 17 of the drive motor 1 - rotate freely. With the rotating drive element 2, the tool 3 - in the embodiment, the saw chain 4 - driven.
  • the lever 19 is lifted from its support position on the brake lever 14 via a lever mimic, so that the brake lever under the action of the brake spring 16 in the direction of arrow 21st pivoted, the brake band 13 applies and the drive element 2 decelerates to a standstill.
  • the power of the braking device 12 is designed such that the tool comes to a standstill in the range of about 100 milliseconds.
  • the braking device 12 is associated with a sensor 30 according to the invention, which detects the state of the braking device 12.
  • the sensor 30 may be a microswitch in a simple manner, the z. B. scans the position of the brake lever 14.
  • the microswitch outputs a 0/1 status signal to the controller 31.
  • Inductive, capacitive or optical sensors are also advantageously applicable for detecting the state of the braking device.
  • the output signal of the sensor 30 can thus be referred to as the state signal of the braking device 12.
  • This status signal 12 is fed to a controller 31, which evaluates the signal and controls aggregates of the implement 10 as a function of the signal.
  • the drive motor 1 z. B. understood as a main unit, wherein the drive motor may be an internal combustion engine or an electric motor.
  • a lubricating oil pump 40 for chain oil a fuel valve 41 in the fuel supply to an internal combustion engine or a starter 42.
  • the starter 42 may be a mechanical recoil starter or an electric starter and acts directly on the crankshaft 17 of the drive motor 1 a.
  • an accessory which controls the water supply to the cutting disk is designated as an auxiliary unit, which can be designed as a valve and / or as a pump.
  • the valve arranged on a cut-off wheel can be switched to the water supply to the separating disk. The valve is closed and the water supply is disabled when the brake device is engaged. It may also be advantageous to switch the pump depending on the output signal to turn on or off the water supply to the cutting wheel of a cutting machine.
  • the controller 31 is connected via the line 32 to the sensor 30 and is connected via a control line 33 z. B. with an ignition circuit of an internal combustion engine or a speed control circuit of an electric motor in combination.
  • the controller 31 via the controller 31, the operational readiness of the drive motor. 1 be controlled in response to the state signal of the braking device 12.
  • an internal combustion engine as a drive motor 1 z. B. be provided that when the drive motor 1 and with dissolved brake device 12, the operational readiness of the drive motor 1 is turned off, such. B. the ignition of the engine is turned off. This ensures that the user can not start the engine when the brake device 12 is released. Only when the braking device 12 according to the operating instructions is in an applied for the start state applied braking state, a starting of the engine is possible.
  • the controller 31 can prevent closing the circuit to the drive motor when the brake device 12 is inserted. This ensures that a start of the electric motor against the braking device 12 is not possible.
  • a speed limit of the drive motor 1 on or off is particularly advantageous when the drive element 2 consists of a centrifugal clutch, which is arranged between a drive shaft - in the embodiment of the crankshaft 17 - and the tool 3.
  • the braking device 12 acts on the clutch drum 2 of the centrifugal clutch, wherein when the brake device 12 is engaged applying the centrifugal clutch can be prevented. If the status signal of the sensor 30 of the controller 31 indicates an inserted braking device 12, ie if the drive element 2 is blocked, a z. B.
  • the speed limitation can also be achieved by a mechanical stop 81 and 81a, which can be switched on in the pivoting of the throttle lever 82 and the throttle lever 82a. If the controller reports the release of the brake device 12, the stop 81 is retracted from the pivoting path. This is mechanically and / or electronically prevented that the centrifugal clutch engages with inserted brake device 12, whereby the centrifugal clutch is protected against damage.
  • a speed limit can be completely prevented by mechanical blocking of the throttle lever 82 by z. B. on the throttle lock 89, a stop 81b is provided, which is in accordance with the double arrow in dependence on operating and starting parameters by the control unit 31 on or extended. In the extended position, a depression and thus a release of the throttle lock 89 is prevented, so that the throttle lever 82 can not be pressed.
  • starting of a combustion engine used as a drive motor can also be permitted when the brake device is released.
  • an electronic or mechanical speed limiter can be activated active, which ensures the startup process that the speed does not rise above the Einkuppel loftiere a centrifugal clutch that drives the tool.
  • the operating state "START” is z. B. detected by an existing engine management and / or the detonator, wherein the state "braking device is not engaged” is detected by the arranged sensor. Due to the engine management, the speed is held at the startup at a speed below the Einkuppelwindiere the centrifugal clutch, which z. B. can be done by Zündungsaustaktung and / or by Zündzeitticianverschiebung.
  • the active limitation on the speed below the engagement speed is advantageously displayed to the user, e.g. B. optically or acoustically. After starting the internal combustion engine, the active speed limitation is switched off by suitable measures, so that the implement can be put into operation as intended. Switching off the speed limitation after the starting process can z.
  • the movement of the throttle lever 82 can be detected by a preferably non-contact measuring motion sensor 85 (FIG. Fig. 2 ).
  • the status signal of the position sensor 30 can be used to switch other units, namely ancillary units of the implement 10 or ancillaries of the internal combustion engine 1.
  • a circuit of the lubricating oil pump 40 for the chain oil is possible, which ensures that the lubricating oil pump 40 then and only then promotes chain oil in the guide of the saw chain 4 when the saw chain 4 rotates.
  • the control of the lubricating oil pump 40 can take place via a switching valve 43 in the lubricating oil line or - when using an electric lubricating oil pump 40 - by switching on and off of this lubricating oil pump 40th
  • a switching valve 41 in the fuel supply can be switched, so that the fuel supply is switched in dependence on the state signal of the braking device 12.
  • a start of the internal combustion engine 1 by the user can also be done by electrical or mechanical blocking of a starter 42, which can be designed as pull-starter or electric starter.
  • a starter 42 which can be designed as pull-starter or electric starter.
  • a mechanical lock 56 via a electrically or mechanically actuated actuator 57 are switched, while in one embodiment as an electric starter, the power supply to the starter can be blocked.
  • an optical display 34 or also an acoustic display 35 may be connected by the controller 31.
  • the optical display 34 may, for. For example, indicate the starting readiness of an internal combustion engine, while the acoustic display 35 can be active when the user takes a start attempt, although the engine is not ready to start.
  • the display may be part of a display device 50 of the implement itself or its drive motor, so that a separate indication of the condition of the braking device can be omitted.
  • the displays 34 and 35 can also be used to display other information.
  • the displays 34 and 35 can also be used to z. B. display the start readiness of an internal combustion engine. Depending on the input or exhibition of a connected via a signal line 45 to the controller ignition switch 44 and the status signal of the braking device 12 z. For example, the optical display 34 is switched to "green" to indicate start-up readiness. For this purpose, the ignition switch 44 must ON and the condition signal of the sensor 30 detect an applied braking device 12.
  • the visual and / or acoustic displays 34, 35 can also be used as operating status displays and also serve as indicators of the speed, the level of the fuel tank or the oil tank or used as a service indicator.
  • the status indicator or the display device 50 of the implement can be designed as an LED, LCD or other display device 50 and also be used to display other information, such.
  • B. the dirt load of an air filter 83 ( Fig. 2 ) z. B. a used as a drive motor 1 internal combustion engine.
  • the air filter loading can be done via a vacuum sensor 84 z. B. in the clean room of the air filter 83 are displayed. If the negative pressure rises above a threshold value, this is displayed to the user by means of the display and / or the display device 50. The user can then clean or replace the air filter 83.
  • An intended for the status display of the braking device display can also be used to display other information.
  • Fig. 2 schematically shown a carburetor 87 with an air filter 83 for an internal combustion engine 88, wherein the throttle lever 82a is moved via a linkage 86 of the throttle lever 82.
  • the movement of the throttle lever 82 can be reported via a non-contact sensor 85 of the controller 31.
  • the control is also the output of the vacuum sensor 84 is supplied, which is arranged in the clean room of the mounted on the carburetor 87 air filter 83. Further, the controller 31 is connected to a movable in the double arrow stop 81, the z. B. is to be controlled electromechanically or electromagnetically. Depending on the state of the braking device can be limited by the stop 81 of the pivoting of the throttle lever 82, so that the rotational speed of the engine 88 can not rise above the Einkuppelitchiere.
  • the throttle valve lever 82a can also be used in the throttle valve lever 82a, including the - dashed line - stop 81a is provided on the carburetor body.
  • the stop 81a is attached directly to the carburetor body.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Harvester Elements (AREA)
EP20090001476 2008-02-06 2009-02-04 Appareil de travail manuel Active EP2087973B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810007786 DE102008007786A1 (de) 2008-02-06 2008-02-06 Handgeführtes Arbeitsgerät

Publications (2)

Publication Number Publication Date
EP2087973A1 true EP2087973A1 (fr) 2009-08-12
EP2087973B1 EP2087973B1 (fr) 2012-08-29

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Family Applications (1)

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Country Status (3)

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US (1) US8661951B2 (fr)
EP (1) EP2087973B1 (fr)
DE (1) DE102008007786A1 (fr)

Cited By (7)

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EP2481905A1 (fr) * 2011-02-01 2012-08-01 Andreas Stihl AG & Co. KG Procédé de commande de la limitation de couple d'un moteur à combustion
EP2693022A1 (fr) * 2012-07-31 2014-02-05 Andreas Stihl AG & Co. KG Procédé de désactivation d'une limitation du régime pour un moteur à combustion
RU2629106C2 (ru) * 2012-06-28 2017-08-24 Андреас Штиль АГ унд Ко. КГ Схема блокировки запуска в рабочем инструменте с двигателем внутреннего сгорания
EP3354892A1 (fr) * 2017-01-30 2018-08-01 Andreas Stihl AG & Co. KG Outil de travail portatif comprenant un moteur à combustion et un dispositif de démarrage électrique
EP3456949A1 (fr) * 2017-09-15 2019-03-20 Andreas Stihl AG & Co. KG Appareil de travail portatif
US10570842B2 (en) 2017-09-15 2020-02-25 Andreas Stihl Ag & Co. Kg Handheld work apparatus
DE102023119535A1 (de) 2023-03-27 2024-10-02 Andreas Stihl Ag & Co. Kg Handgeführtes, tragbares Arbeitsgerät

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DE102008064007A1 (de) * 2008-12-19 2010-06-24 Andreas Stihl Ag & Co. Kg Heckenschere
WO2010115438A1 (fr) * 2009-04-08 2010-10-14 Husqvarna Ab Outils portables alimentés par pile
JP5462575B2 (ja) 2009-10-05 2014-04-02 株式会社マキタ 電動工具
DE102009053236A1 (de) * 2009-11-06 2011-05-12 Andreas Stihl Ag & Co. Kg Handgeführtes Arbeitsgerät mit einem luftgekühlten Verbrennungsmotor
CN102151903B (zh) * 2011-03-03 2012-08-22 浙江亚特电器有限公司 链锯刹车报警结构
JP5707267B2 (ja) * 2011-07-22 2015-04-22 株式会社マキタ 電動工具
DE102011120812B4 (de) * 2011-12-10 2022-06-02 Andreas Stihl Ag & Co. Kg Verfahren zum Betrieb eines handgeführten Arbeitsgeräts
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DE102012012798B4 (de) 2012-06-28 2014-11-13 Andreas Stihl Ag & Co. Kg Arbeitsgerät mit einer Bremseinrichtung
DE102012012801A1 (de) 2012-06-28 2014-01-02 Andreas Stihl Ag & Co. Kg Arbeitsgerät
DE102012012799A1 (de) 2012-06-28 2014-01-02 Andreas Stihl Ag & Co. Kg Arbeitsgerät mit einer Bremseinrichtung
JP2014073566A (ja) * 2012-10-05 2014-04-24 Makita Corp 動力工具
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US11685034B2 (en) * 2014-05-24 2023-06-27 Andreas Stihl Ag & Co. Kg Handheld work apparatus
JP2016133075A (ja) * 2015-01-20 2016-07-25 株式会社やまびこ 携帯式のエンジン作業機
JP6576200B2 (ja) * 2015-10-13 2019-09-18 株式会社やまびこ エンジン駆動式作業機
WO2017097331A1 (fr) * 2015-12-07 2017-06-15 Husqvarna Ab Outil de puissance à main et système de commande associé à ce dernier, et utilisation et procédé de commande
US10436135B2 (en) 2015-12-07 2019-10-08 Husqvarna Ab Hand-held power tool, related control system and its use, and method of controlling said tool
CN108603454A (zh) * 2016-01-28 2018-09-28 胡斯华纳有限公司 控制系统、手持式动力工具、控制系统的使用及控制方法
EP3412392B1 (fr) * 2017-06-09 2021-09-01 Andreas Stihl AG & Co. KG Appareil de travail manuel comprenant un outil et un dispositif de frein pour l'outil
US20200269409A1 (en) * 2017-09-28 2020-08-27 Walbro Llc Power tool including a light-duty combustion engine
SE541451C2 (en) * 2018-02-20 2019-10-08 Husqvarna Ab Chainsaw lubrication need detection
JP7156842B2 (ja) * 2018-07-17 2022-10-19 株式会社やまびこ 手持式作業機
JP7340385B2 (ja) * 2019-08-13 2023-09-07 株式会社やまびこ 電動作業機
EP3944938A1 (fr) * 2020-07-29 2022-02-02 Pedro Luis Velázquez Montiel Mécanisme de sécurité pour machines de coupe manuelles
US12064894B2 (en) 2020-09-04 2024-08-20 Milwaukee Electric Tool Corporation Chainsaw
EP3974111A1 (fr) * 2020-09-25 2022-03-30 Andreas Stihl AG & Co. KG Appareil de travail guidé à la main et procédé d'utilisation d'un appareil de travail guidé à la main
EP4009125A1 (fr) 2020-12-02 2022-06-08 Andreas Stihl AG & Co. KG Procédé de détermination d'informations concernant une condition d'un système de moteur d'entrainement et/ou d'un pack d'accumulateur d'entrainement d'une machine de jardinage, de foresterie et/ou de construction et d'un systeme pour determiner des informations sur l'état d'un systëme de moteur d'entrainement et/ou de traitement de construction de système de moteur d'entrainement équipement
CA3127409C (fr) * 2021-08-11 2022-06-07 Norwood Industries Inc. Frein a tambour raboteur/mouleur
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DE2602247C2 (de) 1976-01-22 1992-04-23 Fa. Andreas Stihl, 7050 Waiblingen Bremseinrichtung an einer motorgetriebenen Handsäge, insbesondere einer Motorkettensäge
DE3244772C2 (fr) 1982-12-03 1990-10-11 Fa. Andreas Stihl, 7050 Waiblingen, De
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2481905A1 (fr) * 2011-02-01 2012-08-01 Andreas Stihl AG & Co. KG Procédé de commande de la limitation de couple d'un moteur à combustion
EP2955354A1 (fr) 2011-02-01 2015-12-16 Andreas Stihl AG & Co. KG Procédé de commande de la limitation de régime d'un moteur à combustion
RU2629106C2 (ru) * 2012-06-28 2017-08-24 Андреас Штиль АГ унд Ко. КГ Схема блокировки запуска в рабочем инструменте с двигателем внутреннего сгорания
EP2693022A1 (fr) * 2012-07-31 2014-02-05 Andreas Stihl AG & Co. KG Procédé de désactivation d'une limitation du régime pour un moteur à combustion
EP3354892A1 (fr) * 2017-01-30 2018-08-01 Andreas Stihl AG & Co. KG Outil de travail portatif comprenant un moteur à combustion et un dispositif de démarrage électrique
EP3456949A1 (fr) * 2017-09-15 2019-03-20 Andreas Stihl AG & Co. KG Appareil de travail portatif
US10570842B2 (en) 2017-09-15 2020-02-25 Andreas Stihl Ag & Co. Kg Handheld work apparatus
DE102023119535A1 (de) 2023-03-27 2024-10-02 Andreas Stihl Ag & Co. Kg Handgeführtes, tragbares Arbeitsgerät

Also Published As

Publication number Publication date
EP2087973B1 (fr) 2012-08-29
DE102008007786A1 (de) 2009-08-13
US8661951B2 (en) 2014-03-04
US20090193669A1 (en) 2009-08-06

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