Patents by Inventor Kenneth D. Prescott

Kenneth D. Prescott 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).

  • Mine roof supports
    Patent number: 4784532
    Abstract: A roof engaging structure for a mine roof support comprises at least two relatively movable roof engaging members 21 and 23, which are coupled together by at least two spaced-apart pivotal joints 25 and 26. The pivotal joints combine to influence the relationship of the roof engaging surfaces of the two members. In one embodiment for example, the roof engaging surfaces of the two roof engaging members may adopt either an angular or a parallel relationship with respect to one another, one surface lying at least partially below the adjacent surface. The arrangement enables the roof engaging structure to shape itself to various forms of mine roof, while preventing jack knifing of the forward end of the roof engaging structure.
    Type: Grant
    Filed: June 19, 1987
    Date of Patent: November 15, 1988
    Assignee: Gullick Dobson Limited
    Inventor: Kenneth D. Prescott