Patents by Inventor Ivar Asplund

Ivar Asplund 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).

  • Vacuum cleaner and temperature-responsive motor cooling device
    Patent number: 3936282
    Abstract: A motor cooling arrangement and device for a vacuum cleaner which is provided with a temperature sensitive means that communicates with a valve and acts on a valve diaphragm when the motor temperature exceeds a predetermined level. When the valve is opened, atmospheric air is permitted to pass into both the dust collecting space and the space housing the motor. In the latter space the motor is subject to an increased air flow that functions to improve the cooling of the working motor.
    Type: Grant
    Filed: February 27, 1975
    Date of Patent: February 3, 1976
    Assignee: Aktiebolaget Electrolux
    Inventors: Ivar Asplund, Karl Arvid Henning Waara