Patents by Inventor Frederik Herrmann

Frederik Herrmann 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).

  • Publication number: 20210151814
    Abstract: A hand-guided, battery-operated working apparatus has an apparatus housing in which is arranged an electric drive motor, a battery tray to accommodate a removable battery pack, and a cooling air guide. The cooling air guide includes an inlet-side air guide portion, which extends from a housing inlet into the battery tray as far as an air outlet from the battery tray, and an outlet-side air guide portion, which leads from the air outlet of the battery tray to the drive motor and, from there, onwards to a housing outlet. The working apparatus has a filter element, which is arranged in the cooling air guide so as to be accessible via the battery tray.
    Type: Application
    Filed: November 18, 2020
    Publication date: May 20, 2021
    Inventors: Georg HEINZELMANN, Martin FAILENSCHMID, Frederik HERRMANN
  • 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
  • Publication number: 20180216554
    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: Application
    Filed: February 1, 2018
    Publication date: August 2, 2018
    Inventors: Andreas Baehner, Michael Dietenberger, Martin Kiesner, Florian Hoche, Klaus Geyer, Steffen Bantle, Friedrich Hollmeier, Frederik Herrmann, Jochen Gantert, Karsten Schmidt
  • 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