Patents by Inventor Lukas Zürcher

Lukas Zürcher has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10821627
    Abstract: A work apparatus has a drive motor and a work tool driven in a rotating manner by the drive motor. The work tool is at least partially covered by a protective hood which is mounted pivotably about the rotational axis of the work tool. A control unit is provided for controlling at least one component of the work apparatus. The work apparatus has a detection unit for detecting at least one position of the protective hood. The control unit is configured for controlling the at least one component of the work apparatus depending on the detected position of the protective hood. In a method for operating a work apparatus, the detection unit detects at least one position of the protective hood and supplies the information to the control unit. The control unit activates the at least one component depending on the detected position of the protective hood.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: November 3, 2020
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Sebastian Hanussek, Lukas Zuercher
  • Publication number: 20190070746
    Abstract: A work apparatus has a drive motor and a work tool driven in a rotating manner by the drive motor. The work tool is at least partially covered by a protective hood which is mounted pivotably about the rotational axis of the work tool. A control unit is provided for controlling at least one component of the work apparatus. The work apparatus has a detection unit for detecting at least one position of the protective hood. The control unit is configured for controlling the at least one component of the work apparatus depending on the detected position of the protective hood. In a method for operating a work apparatus, the detection unit detects at least one position of the protective hood and supplies the information to the control unit. The control unit activates the at least one component depending on the detected position of the protective hood.
    Type: Application
    Filed: September 7, 2018
    Publication date: March 7, 2019
    Inventors: Sebastian Hanussek, Lukas Zuercher
  • Patent number: 9581112
    Abstract: An air filter and carburetor arrangement includes a round filter and a round filter carrier having a filter plate. The round filter has a central filter axis, which lies at an angle to the filter plate. The carburetor has a carburetor body, in which an intake duct is configured with a duct longitudinal axis, and at one end of the intake duct on the carburetor body a filter connection side for the round filter carrier is configured, wherein the round filter carrier is fixed with at least one surface portion of the filter plate on the connection surface of the carburetor. The design is provided such that the duct longitudinal axis of the intake duct lies in the plane of the filter plate at a lateral distance (r) to the filter axis of the round filter fixed to the round filter carrier.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: February 28, 2017
    Assignee: ANDREAS STIHL AG & CO. KG
    Inventors: Karl-David Hermann, Frederik Herrmann, Lukas Zürcher
  • Publication number: 20150000234
    Abstract: An air filter and carburetor arrangement includes a round filter and a round filter carrier having a filter plate. The round filter has a central filter axis, which lies at an angle to the filter plate. The carburetor has a carburetor body, in which an intake duct is configured with a duct longitudinal axis, and at one end of the intake duct on the carburetor body a filter connection side for the round filter carrier is configured, wherein the round filter carrier is fixed with at least one surface portion of the filter plate on the connection surface of the carburetor. The design is provided such that the duct longitudinal axis of the intake duct lies in the plane of the filter plate at a lateral distance (r) to the filter axis of the round filter fixed to the round filter carrier.
    Type: Application
    Filed: June 26, 2014
    Publication date: January 1, 2015
    Applicant: ANDREAS STIHL AG & CO. KG
    Inventors: Karl-David Hermann, Frederik Herrmann, Lukas Zürcher
  • Patent number: 8851262
    Abstract: A coupling device actuated by centrifugal force has a holder and at least one flyweight supported on the holder so as to be moveable in a radial direction relative to an axis of rotation about which the coupling device is rotatable. The flyweight is movable between an inner radial position and an outer radial position. At least one spring acting on the flyweight is provided that forces the flyweight into the inner radial position. At least one securing element secures at least one component of the coupling device in an axial direction of the axis of rotation. The securing element is monolithically formed on the flyweight.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: October 7, 2014
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Bernd Engel, Lukas Zürcher
  • Publication number: 20110198182
    Abstract: A coupling device actuated by centrifugal force has a holder and at least one flyweight supported on the holder so as to be moveable in a radial direction relative to an axis of rotation about which the coupling device is rotatable. The flyweight is movable between an inner radial position and an outer radial position. At least one spring acting on the flyweight is provided that forces the flyweight into the inner radial position. At least one securing element secures at least one component of the coupling device in an axial direction of the axis of rotation. The securing element is monolithically formed on the flyweight.
    Type: Application
    Filed: February 7, 2011
    Publication date: August 18, 2011
    Applicant: ANDREAS STIHL AG & CO. KG
    Inventors: Bernd Engel, Lukas Zürcher
  • Patent number: 8000879
    Abstract: A two-stroke engine has a fuel supply device, an intake passage formed partially in the fuel supply device, and an air filter with clean air chamber. The intake passage upstream of the fuel supply device is connected to the clean air chamber. A partition divides the intake passage downstream of the fuel supply device into a supply passage for fuel-free air and a mixture passage for fuel/air mixture. A throttle valve is supported in the intake passage and aligned in at least one operating state with the partition. A pressure differential between the mixture passage and the supply passage is determined, and in a method for operating such a two-stroke engine, fuel is supplied into the intake passage by a fuel supply valve in the operating state substantially only when the pressure in the mixture passage is not greater than the pressure in the supply passage.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: August 16, 2011
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Lukas Zürcher, Claus Naegele, Georg Maier
  • Publication number: 20100224466
    Abstract: A portable handheld work apparatus has an internal combustion engine (7) which includes an ignition system. An operating-mode position selector (55) is provided which closes a first switch (76) in a first position and closes a second switch (77) in a second position. The first switch (76) includes a first contact (39) and the second switch (77) includes a second contact (40). A simple and robust configuration is provided when the first contact (39) and the second contact (40) are formed on the operating-mode position selector (55).
    Type: Application
    Filed: March 3, 2010
    Publication date: September 9, 2010
    Inventors: Klaus Leinmüller, Lukas Zürcher, Rolf Walter
  • Patent number: 7730857
    Abstract: An internal combustion engine has a carburetor and an intake channel for supplying fuel and combustion air, wherein a section of the intake channel is formed in the carburetor. At least one fuel opening is provided that opens into the intake channel within the carburetor. The intake channel has an intake opening that is connected to a clean chamber of the air filter of the internal combustion engine, wherein the internal combustion engine takes in air through at least one filter element of the air filter. A choke element is arranged in the clean chamber and moveable into a choke position and into an open position. In the open position, the choke element shields the at least one filter element.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: June 8, 2010
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Werner Geyer, Björn Scherraus, Lukas Zürcher
  • Patent number: 7513225
    Abstract: An internal combustion engine having an intake channel for supply of fuel and combustion air, and divided over a portion of its length into a mixture channel, and into a supply channel for supply of largely fuel-free air. A simple manufacture of the engine and a simple construction are achieved if a portion of the intake channel is guided in an elastic intake adapter, whereby the intake adapter has a partition that extends over at least a portion of the length of the intake adapter and divides the intake channel into a mixture channel and a supply channel.
    Type: Grant
    Filed: August 8, 2007
    Date of Patent: April 7, 2009
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Werner Geyer, Björn Scherraus, Lukas Zürcher, Patrick Schlauch, Jürgen Häberlein, Erik Ames
  • Patent number: 7201120
    Abstract: A two-cycle engine having a piston reciprocalbly mounted in a cylinder in which a combustion chamber is formed. In prescribed positions of the piston, the combustion chamber communicates with a crankcase via at least one transfer channel. A portion of an intake channel for supplying fuel/air mixture and combustion air is formed in a carburetor, in which is pivotably mounted a butterfly valve for controlling the flow cross-section of the intake channel. A fuel opening opens into the intake channel portion, and downstream of the carburetor the intake channel is divided into a mixture channel and an air channel. A mechanism is disposed on the butterfly valve to increase the speed of flow in the carburetor in the vicinity of the fuel opening.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: April 10, 2007
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Werner Geyer, Lukas Zürcher