Patents by Inventor Donald C. Estes

Donald C. Estes 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).

  • Apparatus for distributing powdered material
    Patent number: 4510883
    Abstract: Apparatus and method for distributing powdered material uniformly in a generally vertical plane through an arc of about 180.degree., having particular utility for rock dusting underground coal mine tunnels. A pair of rotatable impeller means discharge entrained powdered material through a pair of housings each having oppositely disposed arcuate openings subtending an arc of about 120.degree.. Generally vertical panels on each side of the impellers guide the discharged material.
    Type: Grant
    Filed: January 3, 1984
    Date of Patent: April 16, 1985
    Assignee: Speedco, Incorporated
    Inventor: Donald C. Estes