Patents by Inventor Rebekka Helfen

Rebekka Helfen 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: 7971681
    Abstract: An exhaust-gas muffler (1) has a housing (2) through which at least one sleeve (11) projects. At one end, the sleeve (11) has an attachment opening (10) and at the opposite-lying end has an access opening (14). To avoid a contamination of the sleeve (11) during operation, a plug (15, 25, 35, 40, 45, 55) of a pressed metal wire is arranged in the access opening (14).
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: July 5, 2011
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Eberhard Bohnaker, Rebekka Helfen, Johannes Menzel, Helmut Zimmermann
  • Publication number: 20090294210
    Abstract: An exhaust-gas muffler (1) has a housing (2) through which at least one sleeve (11) projects. At one end, the sleeve (11) has an attachment opening (10) and at the opposite-lying end has an access opening (14). To avoid a contamination of the sleeve (11) during operation, a plug (15, 25, 35, 40, 45, 55) of a pressed metal wire is arranged in the access opening (14).
    Type: Application
    Filed: May 27, 2009
    Publication date: December 3, 2009
    Inventors: Eberhard Bohnaker, Rebekka Helfen, Johannes Menzel, Helmut Zimmermann
  • Patent number: 6679234
    Abstract: A manually guided implement having an internal combustion engine and a carburetor for supplying the engine with a fuel/air mixture is provided. A combustion air stream is drawn in through the carburetor by the engine. A warming medium heated up by the engine can be passed along the outer surfaces of the carburetor separate from the combustion air stream.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: January 20, 2004
    Assignee: Andreas Stihl AG & Co.
    Inventors: Georg Maier, Ralf Tuckermann, Günter Wolf, Philipp Neumann, Rebekka Helfen, Maximilian Eberhardt
  • Publication number: 20020124837
    Abstract: A manually guided implement having an internal combustion engine and a carburetor for supplying the engine with a fuel/air mixture is provided. A combustion air stream is drawn in through the carburetor by the engine. A warming medium heated up by the engine can be passed along the outer surfaces of the carburetor separate from the combustion air stream.
    Type: Application
    Filed: February 28, 2002
    Publication date: September 12, 2002
    Applicant: Andreas Stihl AG & Co.
    Inventors: Georg Maier, Ralf Tuckermann, Gunter Wolf, Philipp Neumann, Rebekka Helfen, Maximilian Eberhardt
  • Patent number: 6375171
    Abstract: The invention relates to a vibration damper between a housing (4), which holds an internal combustion engine, and a handle (3) fixed on the housing (4). The handle (3) is for holding and guiding the motor-driven chain saw (2) during use thereof. The vibration damper (1) is a coil spring (5) which is fixed at a first end (10) thereof with an attachment element (7) to the handle (3) and, at a second end (20), the coil spring is fixed with a further attachment element (30) to the housing. A part turn of the end (10, 20) of the coil spring (5) is held form-tightly to the attachment element (7, 30) in the direction of its longitudinal center axis (25). To provide a torsion-free assembly of the coil spring, it is provided that the coil spring (5) can be assembled from one of its ends (20) between the handle (3) and the housing (4) and be secured at least at one of its ends (20) to the attachment element (30) against a rotational movement in the peripheral direction.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: April 23, 2002
    Assignee: Andreas Stihl AG & Co.
    Inventors: Helmut Zimmermann, Horst Otterbach, Bernhard Dürr, Manfred Rabis, Karl-Heinz Klöpfer, Klaus Martin Uhl, Günter Wolf, Rebekka Helfen