Patents by Inventor Cennert O. Steffen

Cennert O. Steffen 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).

  • Remote control for a vacuum cleaner motor
    Patent number: 4419783
    Abstract: A vacuum cleaner having a suction nozzle which is connected to the cleaner by means of a suction hose and an operating handle and a tubular shaft. An adjustment knob is mounted on the operating handle for varying the speed of the electric motor. The speed is controlled by a variable resistor which has electrical conductors arranged in the vacuum cleaner hose. The conductors are connected to a first coil which surrounds the end of the hose. A second coil in the vacuum cleaner surrounds the first coil concentrically and is connected to the electric control device for the vacuum cleaner.
    Type: Grant
    Filed: May 13, 1982
    Date of Patent: December 13, 1983
    Assignee: Aktiebolaget Electrolux
    Inventor: Cennert O. Steffen