Patents by Inventor Donald E. Wolfe

Donald E. Wolfe 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).

  • Tool for unplugging fire hydrant drains
    Patent number: 4741083
    Abstract: Fire hydrant drain holes are unplugged from within a hydrant barrel by removing the bonnet and valve gear from the top of the barrel and using a specialized drilling tool which is inserted into the barrel to fit on the valve seat. The tool has a drill bit which aligns with the drain hole and a flexible drive wire for the drill bit which extends to the top of the barrel for operation from above the hydrant.
    Type: Grant
    Filed: January 9, 1987
    Date of Patent: May 3, 1988
    Inventor: Donald E. Wolfe