Patents by Inventor Norman E. Warning

Norman E. Warning 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).

  • Air powered door operator
    Patent number: 4417418
    Abstract: For a system in which an overhead door is raised or lowered by a combination of a cable, spring, drum and torsion bar which is rotated by a chain-driven sprocket, a pair of pneumatic cylinders having elongated rods attached to the cylinder pistons are attached to the sprocket chain to drive the chain to raise and lower the door. Braking and safety features are provided.
    Type: Grant
    Filed: February 12, 1982
    Date of Patent: November 29, 1983
    Inventor: Norman E. Warning