Patents by Inventor Chris D. Kitchen

Chris D. Kitchen 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).

  • Variable yielding mining crib support column
    Patent number: 5439325
    Abstract: A roof support column used as a support between the roof and floor of a mine comprises a stacked series of hollow roof support cribs containing a mixture of light-weight aggregate such as volcanic lava, tuft or pumice, and a chemical foam contained in one chamber of a triple-walled high density paper tubing. The other chamber has honeycomb material therein. The combination of these materials results in a roof support crib which has the yielding characteristics of wood. Such cribs called variable yielding cribs are stacked and locked on top of one another to form a vertical cylindrical cribbing support column.
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: August 8, 1995
    Assignee: Mountainland Support, Inc.
    Inventor: Chris D. Kitchen
  • Collapsible crib mining support column
    Patent number: 5342150
    Abstract: A roof support column used as a support between the roof and floor of a mine comprises a stacked series of hollow roof support cribs containing a mixture of light-weight aggregate such as volcanic lava, tuft, or pumice, and a chemical foam contained in a double-walled high density paper tubing. The combination of these materials results in a roof support crib which has the yielding characteristics of wood. Such cribs called variable yielding cribs are stacked and locked on top of one another to form a vertical cylindrical cribbing support column.
    Type: Grant
    Filed: February 26, 1993
    Date of Patent: August 30, 1994
    Assignee: Mountainland Support, Inc.
    Inventor: Chris D. Kitchen