Patents by Inventor Gerald E. Drinkuth

Gerald E. Drinkuth 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).

  • Automatic damper assembly
    Patent number: 4189090
    Abstract: An automatic damper for closing the flue of a furnace during periods of non-combustion utilizing a pivotally mounted linkage arm spring biased against a motor driven cam to effect rotation of the damper to open and close the flue. Switches, responsive to the position of the damper operate to selectively activate the motor in accordance with the combustion state of the furnace. Provisions are also described for inhibiting combustion in the furnace when the damper is not in an open position.
    Type: Grant
    Filed: September 22, 1977
    Date of Patent: February 19, 1980
    Inventor: Gerald E. Drinkuth