Patents by Inventor David W. Kroeter

David W. Kroeter 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).

  • Flue fire controller
    Patent number: 4519458
    Abstract: A flue fire controller is provided which includes a temperature responsive valve between a source of pressurized fire retardant or extinguishing material and the interior of the flue pipe. When the temperature of the flue pipe increases to a level indicative of a flue fire, the valve automatically opens to allow the material to extinguish the fire. Means are also provided to close the valve after the temperature has dropped below the preselected value.
    Type: Grant
    Filed: June 23, 1983
    Date of Patent: May 28, 1985
    Assignee: Kroeter, Inc.
    Inventor: David W. Kroeter