Patents Assigned to Andreas Stihl AG & Co. KG
  • Starter device for an internal combustion engine and backpack power tool with an internal combustion engine and with a starter device for the internal combustion engine
    Patent number: 10451017
    Abstract: A starter device for an internal combustion engine has a rope pulley and a starter rope wound onto the rope pulley. A starter handle is fastened to the starter rope. A rope guide with a first deflection roller is provided. A rope outlet opening is arranged along a circumferential section of the first deflection roller and extends along the circumferential section of the first deflection roller about a peripheral angle of the first deflection roller of at least 60°. The rope guide guides the starter rope from the guide pulley to the rope outlet opening of the starter device. A guide element is arranged at rope outlet opening and holds the starter rope in the rope outlet opening. The starter handle can be positioned relative to the rope outlet opening at different orientations and enables ergonomic starting of the internal combustion engine of a backpack power tool.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: October 22, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Gerd Densborn, Harald Schliemann
  • Hedge trimmer
    Patent number: 10440899
    Abstract: A hedge trimmer has at least one cutting blade and an internal combustion engine operatively connected to the at least one cutting blade so as to drive the at least one cutting blade reciprocatingly. The internal combustion engine has an exhaust gas muffler with an outlet for discharging exhaust gases from the exhaust gas muffler. A multi-part exhaust gas pipe is connected seal-tightly to the outlet of the exhaust gas muffler and connects the outlet of the exhaust gas muffler to an outlet opening where the exhaust gases exit from the hedge trimmer. The multi-part exhaust gas pipe has a plurality of pipe sections, including at least a first pipe section and a second pipe section, wherein the second pipe section is embodied separate from the first pipe section. At least one of the plurality of pipe sections is made of plastic material.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: October 15, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Fevronia Konstantinidou, Johannes Menzel, David Hampe, Ralf Steidinger
  • Handheld work apparatus
    Patent number: 10434586
    Abstract: A handheld work apparatus has a motor unit, a tool unit and an outrigger having a carrier part. The outrigger connects the motor unit to the tool unit. The carrier part has a base plate having an inner side and an outer side. A drive shaft and a driven shaft are arranged transversely to the base plate. The carrier part has a first stiffening structure, which rises from the inner side of the base plate toward a space diagonal. On the outer side of the base plate, a second stiffening structure rises toward the same space diagonal, wherein the first stiffening structure and the second stiffening structure conjointly form a spatially diagonally running stiffening element.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: October 8, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventor: Ludwig Geromiller
  • Electrical plug connection between a power source and an electrical work apparatus
    Patent number: 10424883
    Abstract: An electrical plug connection is for electrically connecting a power source in a releasable manner to an electrical work apparatus. The plug connection includes at least one first electrical line for the purpose of transmitting electrical power and at least one second electrical line for the purpose of transmitting signals. The plug connection includes a plug with a plug body and one or more first plug contacts and a plug socket with first contact sockets, wherein the plug contacts of the first electrical line are arranged within the plug body. The plug contact of the second electrical line is in the form of an external contact in the region of an outer contour of the plug body, wherein a mating contact of the plug socket is associated with the external contact of the plug body. The external contact and the mating contact form a latching connection.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: September 24, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Joachim Kolb, Alexander Nordmann, Markus Maier, Jochen Luz, Daniel Bahner
  • Chipper chain and motor-driven chain saw having a chipper chain
    Patent number: 10406716
    Abstract: The invention relates to a chipper chain (10) for a motor-driven chain saw (9) as well as a chain saw having such a chipper chain (10). The chipper chain (10) includes drive links (1), connecting links (2), and cutting links (3). The drive links (1) each have a drive projection (4). The cutting links (3) each have an upper cutting blade (5) and a depth limiter (6) which leads the upper cutting blade (5). The chipper chain (10) has a maximum width (A) which is defined by the upper cutting blades (5), a maximum height (C) which is measured perpendicularly to its longitudinal axis and extends from the drive projection (3) to the upper cutting blade (5), and an average divide (T) predetermined by the average distance of adjacent pivot pins (7). The product of the maximum width (A), the maximum height (C), and the average divide (T) is ?450 mm3. The driving power of the motor-driven chain saw (9) is ?1.0 kW.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: September 10, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Jan Föhrenbach, Jochen Buchholtz, Alexander Fuchs, Klaus Dussler
  • Circuit arrangement for determining the cell voltage of an individual cell in a cell grouping
    Patent number: 10401437
    Abstract: A circuit arrangement is for determining the cell voltage of an individual cell in a cell grouping of a series circuit of individual cells of an accumulator pack. Potential points are formed between electrically adjacent individual cells of the series circuit. The potentials of the potential points which follow one another in the series circuit increase in absolute value starting from a reference potential. Each potential point is connected to a measuring input of an evaluation device via a measuring resistor and a switch. In order to measure the cell voltage of an individual cell, the measuring input is connected to the reference potential via a capacitor. The evaluation device registers the charging time of the capacitor to a predefined voltage. On the basis of the registered charging time, the evaluation device determines the cell voltage of the measured individual cell.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: September 3, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Martin Schurr, Gernot Liebhard, Christian Heigemeyr, Markus Kulzer
  • Work apparatus having a braking arrangement
    Patent number: 10371044
    Abstract: A work apparatus having a work tool and having a combustion engine which drives the work tool has a start enrichment device for the combustion engine and a braking arrangement for the work tool. The work apparatus has an operating mode selector for actuating the start enrichment device. The start enrichment device actuates the braking arrangement in at least one start position. Low actuating forces and a simple configuration are achieved when the braking arrangement is a differential band brake.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: August 6, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventor: Carel Karrar
  • Back carrier and an extension plate for a back carrier
    Patent number: 10357099
    Abstract: A back carrier has a back plate and a shoulder strap. The back plate has a longitudinal extent and, in the direction of its longitudinal extent, has an upper and a lower end section. The upper end section reaches as far as the upper end of the back plate. The strap extends on the back side of the back plate, which faces toward the back of a user. The strap is fastened with a first strap section in the area of the upper end section to an upper fastening location and is fastened with a second strap section in the area of the lower end section to a lower fastening location. In the area of the upper end section, the back plate has a recess for receiving an extension plate. In the direction of the longitudinal extent, the recess is open toward the upper end of the back plate.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: July 23, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Jens Riehmann, Markus Zeller, Harald Schliemann
  • Piston for a two-stroke engine operating with advanced scavenging and a two-stroke engine
    Patent number: 10344707
    Abstract: A piston for a two stroke engine which operates with advanced scavenging has a piston base and a piston skirt. The center axis of the piston skirt forms a longitudinal center axis of the piston. The piston has two piston pin eyes, in which piston pin receptacles are configured. The center axis of the piston pin receptacles forms a transverse axis of the piston. The piston has at least one piston pocket. At least one piston pin eye is connected via at least one connecting rib to the piston skirt. Here, the connecting rib runs on that side of the piston pocket which faces away from the piston base.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: July 9, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Birger Loew, Jonas Lank
  • Carburetor and method for operating an internal combustion engine having said carburetor
    Patent number: 10337458
    Abstract: A carburetor has a housing wherein a control drum is rotatably mounted. A section of an intake channel is formed in the carburetor. A subsection of this section is formed in the control drum. The control drum controls the free flow cross section of the intake channel. A fuel opening is connected to a fuel chamber via an unbranched fuel channel which opens into the subsection of the intake channel. A simple configuration of the carburetor is achieved by the carburetor including an electrically actuated valve which controls the flow of fuel through the fuel channel. For a method for operating an internal combustion engine with a carburetor, a temperature (T) is determined before or during the starting of the engine and that the flow of fuel through the fuel channel during the starting of the engine is controlled in dependence upon the temperature (T).
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: July 2, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Michael Raffenberg, Antonio Fattorusso, Isgard Sabelberg
  • Power tool
    Patent number: 10329994
    Abstract: 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.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: June 25, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Martin Rieber, Thorsten Schäffer, Jens Riehmann, Arno Kinnen, Volker Donner
  • Method for adapting the composition of a mixture of fuel and combustion air
    Patent number: 10330038
    Abstract: The invention relates to a method for adapting the composition of a mixture of fuel and combustion air. The mixture is supplied to a combustion chamber of a mixture-lubricated combustion engine in a work apparatus. The fuel is supplied to the combustion engine via a controlled fuel valve. In an operating state (I) of the combustion engine, the quantity of fuel is metered by the fuel valve. For the purpose of adapting the composition of the mixture, the combustion engine is shifted into a special operating state (II) which differs from the normal operating state (I). After starting, the combustion engine is operated in a first rotational speed range (B) for a prespecified operating time (Tmin), wherein, after the prespecified operating time (Tmin) has elapsed, the operating state (II) for adapting the composition of the mixture is initiated by a prespecified user action.
    Type: Grant
    Filed: February 1, 2018
    Date of Patent: June 25, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Andreas Baehner, Michael Dietenberger, Martin Kiesner, Florian Hoche, Klaus Geyer, Steffen Bantle, Friedrich Hollmeier, Frederik Herrmann, Jochen Gantert, Karsten Schmidt
  • Hand-guided power tool with a control device
    Patent number: 10322519
    Abstract: 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.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: June 18, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Günter Wolf, Jan Kurzenberger, Holger Vollmer, Marcel Förster, Ulrich Kapinsky
  • Starter device for an internal combustion engine and handheld work apparatus having an internal combustion engine and said starter device
    Patent number: 10309362
    Abstract: A starter device for an internal combustion engine has an entrainer for coupling to the engine. The entrainer and an actuator of the starter device are mounted rotatably about a rotational axis. A damper spring is arranged between and operatively connects the entrainer and the actuator to each other. The starter device has at least one stud, on whose outer periphery the damper spring is mounted. The damper spring is a hinge spring wound from a spring wire. The cross section of the spring wire is rounded on the inner side of the spring wire. At least a portion of the cross section runs linearly on the outer side of the spring wire.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: June 4, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Patrick Behringer, Sven Keller, Werner Vonderau
  • Guide bar for a saw chain having a reduced-wear direction-reversing section
    Patent number: 10307930
    Abstract: A guide bar for a saw chain includes an elongate, flat base body made of a basic material. The base body extends along a longitudinal center axis and, in order to guide a saw chain, has a running surface formed on an outer periphery thereof and a guide groove formed in the outer periphery of the base body. The guide groove has a groove base. A direction-reversing section for the saw chain is provided at one end of the base body. The direction-reversing section includes at least one add-on component having a running surface made of more wear-resistant material than the basic material of the base body. The add-on component is secured to the base body of the guide bar by at least one weld seam. The weld seam extends between the add-on component and the base body and is located spatially beneath the groove base.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: June 4, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Alexander Fuchs, Thomas Voigt, David Mitrega, Matthias Schulz, Thomas Lux, Oliver Gerstenberger, Jochen Buchholtz, Berthold Schell, Norbert Apfel, Bernd Hein, Ruediger Ludwig, Jan Foehrenbach
  • Hand-guided power tool with telescoping section
    Patent number: 10302142
    Abstract: 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.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: May 28, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Gerd Densborn, Jan Föhrenbach, Benjamin Barth
  • Handheld work apparatus having an electric motor and method for activating the same
    Patent number: 10293445
    Abstract: 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 (?TB) of the actuation element. A method for activating the apparatus is also disclosed.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: May 21, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Oliver Gerstenberger, Florian Hoche, Kay-Steffen Gurr, Fabian Gwosdz
  • Portable work apparatus
    Patent number: 10267220
    Abstract: 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.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: April 23, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Thomas Hilt, Klaus Prach, Thomas Stark
  • Battery powered hedge trimmer
    Patent number: D846960
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: April 30, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventor: Michael Tinius
  • High-pressure cleaner spraying gun
    Patent number: D850582
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: June 4, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventor: Andreas Weinberg