Patents by Inventor Freeman, Reginald E.

Freeman, Reginald E. 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).

  • Self-advancing support and control means therefor
    Patent number: 4491441
    Abstract: A self-advancing support, suitable for use in mines, includes a cantilever which is extendible and retractable with respect to a main portion of the support, and a sprag which is so mounted on said cantilever as to be extendible and retractable with respect thereto. Means are provided for advancing the support with respect to a mineral face and further means are provided for ensuring that during advance of the support the sprag is maintained in an extended, mineral-face-engaging, condition while the main portion is moved with respect to the cantilever in the direction towards the face, thereby reducing cantilever extension.
    Type: Grant
    Filed: October 13, 1983
    Date of Patent: January 1, 1985
    Assignee: Dowty Mining Equipment Limited
    Inventors: Freeman, Reginald E., Alan J. Berry