Patents by Inventor Robert L. Harrell

Robert L. Harrell 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).

  • Cylindrical evaporative cooler apparatus
    Patent number: 4428890
    Abstract: Cylindrical evaporator cooler apparatus includes a lower portion having a water sump, a water pump, and a support for a blower system, a vertically extending and cylindrical pad frame, and a top lid covering the pad frame which includes an integral trough through which water is fed to saturate the pads disclosed in the pad frame.
    Type: Grant
    Filed: May 18, 1982
    Date of Patent: January 31, 1984
    Assignee: Hi-Lo Manufacturing, Inc.
    Inventor: Robert L. Harrell
  • Cylindrical evaporative cooler
    Patent number: D256388
    Type: Grant
    Filed: September 25, 1978
    Date of Patent: August 12, 1980
    Inventor: Robert L. Harrell