Patents by Inventor Harald Buehner

Harald Buehner 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).

  • Handheld work apparatus having a pump, said pump and pump bulb therefor
    Patent number: 10202951
    Abstract: A handheld work apparatus has a fuel supply system and a pump for delivering fuel from the fuel supply system. The pump has an elastic pump bellows which can be actuated by the operator. The pump bellows has a fastening section at which the pump bellows is fastened to a housing. The pump bellows has a main section and a roof section, wherein the roof section has a dome-shaped section adjoining the main section and a cap which adjoins the dome-shaped section and closes off the dome-shaped section. In order to achieve a rapid return of the pump bellows from the actuated position into the unactuated position, even at low temperatures, it is provided that the smallest wall thickness (g) of the main section is at least 10% greater than the smallest wall thickness (h) of the dome-shaped section.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: February 12, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Robert Feulner, Harald Buehner, Ricardo Hojczyk, Tobias Bernhard
  • HANDHELD WORK APPARATUS HAVING A PUMP, SAID PUMP AND PUMP BELLOWS THEREFOR
    Publication number: 20150136252
    Abstract: A handheld work apparatus has a fuel supply system and a pump for delivering fuel from the fuel supply system. The pump has an elastic pump bellows which can be actuated by the operator. The pump bellows has a fastening section at which the pump bellows is fastened to a housing. The pump bellows has a main section and a roof section, wherein the roof section has a dome-shaped section adjoining the main section and a cap which adjoins the dome-shaped section and closes off the dome-shaped section. In order to achieve a rapid return of the pump bellows from the actuated position into the unactuated position, even at low temperatures, it is provided that the smallest wall thickness (g) of the main section is at least 10% greater than the smallest wall thickness (h) of the dome-shaped section.
    Type: Application
    Filed: November 19, 2014
    Publication date: May 21, 2015
    Inventors: Robert Feulner, Harald Buehner, Ricardo Hojczyk, Tobias Bernhard
  • Air filter unit
    Patent number: 8277527
    Abstract: An air filter unit (1) for a carburetor (2) of a portable handheld work apparatus includes a filter element (3) and at least one clean air channel (10, 11) arranged between the filter element (3) and the carburetor (2). At least one condensation rib (29, 30, 31, 32) is arranged in the clean air channel (10, 11) running in flow direction.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: October 2, 2012
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Sven Keller, Harald Bühner, Christoph Maschke, Armin Kölmel, Andreas Weisshaar, Konrad Knaus
  • Air filter unit
    Publication number: 20100192901
    Abstract: An air filter unit (1) for a carburetor (2) of a portable handheld work apparatus includes a filter element (3) and at least one clean air channel (10, 11) arranged between the filter element (3) and the carburetor (2). At least one condensation rib (29, 30, 31, 32) is arranged in the clean air channel (10, 11) running in flow direction.
    Type: Application
    Filed: February 1, 2010
    Publication date: August 5, 2010
    Inventors: Sven Keller, Harald Bühner, Christoph Maschke, Armin Kölmel, Andreas Weisshaar, Konrad Knaus