Patents by Inventor Donald L. Shaffer

Donald L. Shaffer 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).

  • Patent number: 4694819
    Abstract: A fireplace screen fixture is shown for assembly to the front face of a fireplace opening. This fixture includes a metal frame capable of outlining a fireplace opening, and it has a supporting rod extending transversely across the upper portion of the frame from one side to the other. A plurality of ring members are threaded onto the supporting rod and they are capable of moving along the length of the rod. A pair of wire screen curtains are supported within the frame by being suspended at their upper portions from the ring members. The invention comprises a sheet metal locking strip attached to the vertical mating side edge of each screen curtain so that when these two screen curtains are stretched closed these two locking strips are interlocked with each other as a safety measure to keep logs or wood from falling accidentally through the screen while the fire is burning. Also, the screen curtains are prevented from developing a gap and allowing sparks to enter the room as a fire hazard.
    Type: Grant
    Filed: August 27, 1986
    Date of Patent: September 22, 1987
    Inventor: Donald L. Shaffer