Patents by Inventor Jorg Elfner

Jorg Elfner 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: 9221111
    Abstract: A hand-guided power tool has a support arm and a tool member supported on the support arm. A drive motor is provided and a drive belt is rotatably driven by the drive motor and drives in turn the tool member. The support arm has a belt chamber in which the drive belt is arranged. The belt chamber is closed off relative to the environment and sealed off relative to the environment.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: December 29, 2015
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Jörg Elfner, Tobias Deigendesch, Florian Hoche
  • Publication number: 20150038064
    Abstract: A hand-guided power tool has a support arm and a tool member supported on the support arm. A drive motor is provided and a drive belt is rotatably driven by the drive motor and drives in turn the tool member. The support arm has a belt chamber in which the drive belt is arranged. The belt chamber is closed off relative to the environment and sealed off relative to the environment.
    Type: Application
    Filed: July 29, 2014
    Publication date: February 5, 2015
    Inventors: Jörg Elfner, Tobias Deigendesch, Florian Hoche
  • Patent number: 8746191
    Abstract: A two-stroke engine has an intake arrangement including a carburetor. An intake channel divides into a mixture channel and an air channel. An intermediate flange is mounted between the carburetor and the cylinder. This flange has a carburetor connecting surface, which faces toward the carburetor, and a cylinder connecting surface which faces toward the cylinder. Referred to the flow direction in the intake channel, the air channel divides upstream of the cylinder connecting surface into two branches. The first branch has a first longitudinal center axis and the second branch has a second longitudinal center axis. The intersect points of the center axes with the connecting surfaces are mutually connected via an imaginary connecting line in the carburetor connecting surface or the cylinder connecting surface. The two connecting lines conjointly define an angle ? in the carburetor connecting surface with this angle being greater than 0°.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: June 10, 2014
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Jörg Elfner, Fevronia Konstantinidou, Karsten Schmidt, Michael Raffenberg
  • Publication number: 20130228159
    Abstract: A two-stroke engine has an intake arrangement including a carburetor. An intake channel divides into a mixture channel and an air channel. An intermediate flange is mounted between the carburetor and the cylinder. This flange has a carburetor connecting surface, which faces toward the carburetor, and a cylinder connecting surface which faces toward the cylinder. Referred to the flow direction in the intake channel, the air channel divides upstream of the cylinder connecting surface into two branches. The first branch has a first longitudinal center axis and the second branch has a second longitudinal center axis. The intersect points of the center axes with the connecting surfaces are mutually connected via an imaginary connecting line in the carburetor connecting surface or the cylinder connecting surface. The two connecting lines conjointly define an angle ? in the carburetor connecting surface with this angle being greater than 0°.
    Type: Application
    Filed: March 16, 2012
    Publication date: September 5, 2013
    Inventors: Jörg Elfner, Fevronia Konstantinidou, Karsten Schmidt, Michael Raffenberg
  • Patent number: 8469167
    Abstract: A centrifugal clutch, especially in a hand held work apparatus, such as a cut-off machine (1), a brush cutter or the like, having a rotational axis (20), at least one movably mounted centrifugal weight (25) arranged at the drive end and a clutch drum (16) arranged at the output end. The centrifugal clutch (15) includes a brake device (18) which is released by the centrifugal weight (25) when the centrifugal weight (25) moves radially outward in relation to the rotational axis (20).
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: June 25, 2013
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Sebastian Hanussek, Jörg Elfner, Tim Gegg
  • Publication number: 20110073435
    Abstract: A centrifugal clutch, especially in a hand held work apparatus, such as a cut-off machine (1), a brush cutter or the like, having a rotational axis (20), at least one movably mounted centrifugal weight (25) arranged at the drive end and a clutch drum (16) arranged at the output end. The centrifugal clutch (15) includes a brake device (18) which is released by the centrifugal weight (25) when the centrifugal weight (25) moves radially outward in relation to the rotational axis (20).
    Type: Application
    Filed: September 24, 2010
    Publication date: March 31, 2011
    Inventors: Sebastian Hanussek, Jörg Elfner, Tim Gegg
  • Publication number: 20090013842
    Abstract: A power tool has a drive motor that drives a tool and an optical guiding device secured on the power tool in alignment relative to the work tool. The guiding device is arranged in a low-vibration arrangement on the power tool and is in particular secured on the power tool in a low-vibration area of the power tool. At least one section of the power tool vibrates in the form of a standing wave in at least one direction, wherein the low-vibration area where the guiding device is arranged is the area of a node of the standing wave.
    Type: Application
    Filed: July 1, 2008
    Publication date: January 15, 2009
    Applicant: ANDREAS STIHL AG & CO. KG
    Inventors: Heiko Rosskamp, Jorg Elfner, Roland Schierling, Peter Bauer
  • Publication number: 20070084062
    Abstract: A trimmer comprising a cutting filament head adapted to be rotatably driven by a drive motor. A cutting filament extends out of the cutting filament head and defines a path during a trimming operation. A guard is provided, and in a trimming position of the trimmer a portion of the guard is disposed between the path of the cutting filament and the ground.
    Type: Application
    Filed: October 6, 2006
    Publication date: April 19, 2007
    Applicant: Andreas Stihl AG & Co. KG
    Inventors: Jorg Elfner, Georg Maier, Marc Mildner