Patents by Inventor Ove Donnderdal

Ove Donnderdal 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).

  • Device in connection with hand-operated working machine
    Patent number: 6442841
    Abstract: A device in connection with a hand-operated working machine with a water flow directed to the working tool comprises a first control which is a control (15) for a drive motor (3) for the tool, and a second control which is a control (17) for the water supply to the tool. A water control valve (45) in a water supply conduit (14) can be adjusted to adopt chosen opening positions, and is arranged constantly to be kept open in any chosen opening position when the motor is running the tool under influence of the drive motor control. The chosen opening positions are adjustable, i.e. the through opening of the valve can be increased or decreased by using water supply control (17).
    Type: Grant
    Filed: June 23, 1998
    Date of Patent: September 3, 2002
    Assignee: Aktiebolaget Electrolux (publ.)
    Inventors: Dan Nilsson, Ove Donnderdal, Håkan Larsson