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公开(公告)号：US10730156B2
公开(公告)日：2020-08-04
申请号：US15884152
申请日：2018-01-30
发明人： Ernst Gorenflo
摘要： A start device is for a chainsaw having a combustion engine. The start device includes an electric motor with a control device, which initiates operation of the electric motor and starts up the combustion engine. The chainsaw has a brake device for bringing the tool to a standstill, wherein the brake device can be operated via an actuation lever. For this purpose, the actuation lever can be moved from a first position (A) into at least one further position (B). The control device is connected to a signal transmitter, which is actuated, and emits a signal to the control device, when the actuation lever is moved from the first position (A) into the further position (B), wherein the signal forms a start signal for initiating operation of the electric motor and for starting up the combustion engine.
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公开(公告)号：US10718295B2
公开(公告)日：2020-07-21
申请号：US16244984
申请日：2019-01-10
发明人： Jan Dworschak , Jan Pawlowski
IPC分类号： F02M1/02 , F02D9/16 , F02D35/00 , F02M9/08 , F02B33/04 , F02B63/02 , F02M17/02 , F02M35/10 , F02B75/02
摘要： A carburetor for the combustion engine in a handheld work apparatus has a carburetor housing in which a carburetor drum is mounted rotatably about a pivot axis. The carburetor drum has a drum body which has at least one channel which runs transversely with respect to the pivot axis and forms an intake channel portion. A sensing unit for sensing at least one rotational position of the carburetor drum is provided. The sensing unit includes a control contour and a sensing device interacting with the control contour. The control contour is formed on the carburetor drum. A method for operating a combustion engine makes provision for the control device to control the supplied quantity of fuel depending on the rotational position, sensed by the sensing unit, of the carburetor drum.
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公开(公告)号：US10589411B2
公开(公告)日：2020-03-17
申请号：US15943650
申请日：2018-04-02
发明人： Andreas Schulz , Ralf Blechschmidt
摘要： A work apparatus has a first and a second assembly. The second assembly is mounted movably in relation to the first assembly via at least one antivibration element. Formed between the first assembly and the second assembly is a vibration gap, which is bridged by the antivibration element. The work apparatus has a switch, for actuation by an operator, which includes a first contact element and a second contact element. When the switch is closed, the first contact element and the second contact element contact each other. When the switch is open, the first and second contact element do not establish an electrically conductive contact. The second contact element is part of the second assembly. The first contact element is part of the first assembly and, when the switch is closed, the first contact element and the second contact element bridge the vibration gap between the first and second assembly.
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公开(公告)号：US10525611B2
公开(公告)日：2020-01-07
申请号：US16133451
申请日：2018-09-17
摘要： A handheld work apparatus has a combustion engine with a cylinder. A removable cover is fixed via a closure. The closure includes a tensioning element rotatable about a rotational axis and, in the locked position of the closure, is supported on a tension contour. The closure has a damping element. The damping element is held on a section of the cylinder in the axial direction of the rotational axis. During rotation from unlocked into locked position, the tensioning element is moved by the tension contour in the axial direction of the rotational axis. In the locked position of the closure, the tensioning element clamps the section of the cylinder in the axial direction of the rotational axis between a first abutment and a second abutment of the damping element. In the unlocked position of the closure, the tensioning element is held on the damping element on the cylinder.
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公开(公告)号：US10512999B2
公开(公告)日：2019-12-24
申请号：US14542490
申请日：2014-11-14
摘要： The invention relates to a multi-part cut guard for a tool that is rotatable in a cutting plane. The cut guard includes a first part element and at least one further part element. The part elements are connected together at their ends and form a closed circumference. Opposing first ends of the part elements are connected together, forming a pivot joint. The second ends of the part elements are fixed releasably together. The pivot joint is formed from a latching receptacle and a latching stub which form the pivot joint in the latched state and are intended to be separated in order to release the latching.
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公开(公告)号：US10329994B2
公开(公告)日：2019-06-25
申请号：US13707724
申请日：2012-12-07
发明人： Martin Rieber , Thorsten Schäffer , Jens Riehmann , Arno Kinnen , Volker Donner
摘要： A power tool has an internal combustion engine with an injection valve through which fuel is supplied to the internal combustion engine; a crankcase; and a crankshaft arranged in the crankcase so as to be rotatable about an axis of rotation. A fan wheel housing is provided and a fan wheel is arranged in the fan wheel housing and conveys cooling air to the internal combustion engine. In the fan wheel housing a connecting opening is formed. The injection valve is arranged in a cooling area, wherein cooling air is supplied by the fan wheel through the connecting opening to the cooling area.
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公开(公告)号：US10322519B2
公开(公告)日：2019-06-18
申请号：US15376865
申请日：2016-12-13
IPC分类号： B27B17/08 , F02M35/04 , F02B63/02 , B23D57/02 , B27B17/02 , F02M35/024 , F02M37/00 , B25F5/02
摘要： A hand-guided power tool has a power tool housing and an internal combustion engine arranged in the power tool housing and configured to drive a tool member of the power tool. A fuel tank and at least one electric component are provided. A control device that is an electronic control unit is connected to the at least one electric component of the power tool and controls the at least one electric component. The power tool has a top face which, when parking the power tool in a usual parking position on a flat horizontal support surface, is facing upwardly. The electronic control unit is positioned laterally adjacent to the fuel tank device, when viewing the power tool in the usual parking position.
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公开(公告)号：US10302142B2
公开(公告)日：2019-05-28
申请号：US15040459
申请日：2016-02-10
发明人： Gerd Densborn , Jan Föhrenbach , Benjamin Barth
摘要： A power tool is provided with a drive motor and a tool unit with a tool driven by the drive motor. A guide tube with telescoping section with external and internal tubes is provided, wherein the internal tube is longitudinally slidable within the external tube. A clamping device secures the internal tube relative to the external tube and has a clamping member supported rotatably relative to the internal tube and connected by a thread connection to the external tube. The clamping device is provided with a clamping ring with an opening arranged about an outer circumference of the internal tube. Compression of the clamping ring in longitudinal guide tube direction effects a size reduction of the clamping ring opening. The clamping ring has a first axial face supported relative to the external tube and a second axial face supported relative to the clamping member.
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公开(公告)号：US10293445B2
公开(公告)日：2019-05-21
申请号：US15266988
申请日：2016-09-15
摘要： A handheld work apparatus has an electric motor and a voltage source for operating the motor. A manual actuation element provided on a handle of the apparatus is operated by a user and is provided for activating the motor. The actuation element is connected to a control unit which controls the energy supply from the source to the motor as a function of an operating signal of the actuation element. If the control unit is in a blocking state, the energy supply to the motor is blocked independently of the operating signal of the actuation element. After receiving a control signal, the control unit switches from the blocking state to a standby state to release an energy supply to the motor. The control signal is derived from a combination of an actuation stroke and an actuation time (ΔTB) of the actuation element. A method for activating the apparatus is also disclosed.
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公开(公告)号：US10267220B2
公开(公告)日：2019-04-23
申请号：US15208359
申请日：2016-07-12
发明人： Thomas Hilt , Klaus Prach , Thomas Stark
摘要： A portable work apparatus has a drive motor and a housing which is formed at least partially by a housing part. The work apparatus has an operating fluid tank which is formed separately from the housing part and which has a cavity for receiving operating fluid. The operating fluid tank has a first portion which is arranged in a receptacle of the housing part, and a second portion which at least partially delimits the cavity and which protrudes from the receptacle. Provision is made for the operating fluid tank to be fixed to the housing part by at least one fastener, and for the receptacle to be delimited at least partially by a plurality of ribs of the housing part that are arranged at a spacing (f) from one another.
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