Patents by Inventor Richard D. Stegall

Richard D. Stegall 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).

  • Ice cutter having injection of low density fluid
    Patent number: 4022142
    Abstract: An ice cutting system in which a low density fluid, such as air or exhaust gas, is injected into the cutting region. The injection of the low density fluid results in a more efficient cutting operation, and also reduces the buoyancy of the ice chips resulting from the cutting operation. The reduced buoyancy of the ice chips results in the chips sinking in the slurry surrounding the cutter and being dissipated into the water beneath the surrounding ice.
    Type: Grant
    Filed: May 14, 1976
    Date of Patent: May 10, 1977
    Assignee: Suntech, Inc.
    Inventor: Richard D. Stegall