Patents by Inventor Evan J. Currence

Evan J. Currence 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).

  • Solid-state electronic brush speed sensing control
    Patent number: 4398231
    Abstract: This is concerned with a solid-state electronic brush speed sensing control for sensing the rotational speed of the brush in a vacuum cleaner, either of the canister or upright type, so that as the brush slows down or stops due to being jammed or partially jammed by a foreign object, such as a sock or the like, the drive motor will be disconnected from its source of power thereby protecting the brush, the motor, the belts, etc.
    Type: Grant
    Filed: March 3, 1982
    Date of Patent: August 9, 1983
    Assignee: Lake Center Industries
    Inventor: Evan J. Currence