Patents by Inventor Kirk M. Sinclair

Kirk M. Sinclair 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).

  • Dry pneumatic system for hard rock shaft drilling
    Patent number: 5199515
    Abstract: A dry, vertical shaft drilling system including an inverted raiseboring cutterhead fitted with air nozzles and vacuum pickups. Weights are detachably stacked above the cutterhead. Cuttings are extracted through the weights into a swivel circumscribing the drill string. The swivel is a transition from the rotating cutterhead to the stationary extraction riser pipes disposed above the swivel. Non-rotating stabilizers stabilize the drill string.
    Type: Grant
    Filed: December 24, 1990
    Date of Patent: April 6, 1993
    Assignee: Inco Limited
    Inventors: Kirk M. Sinclair, John R. England
  • Dry pneumatic system for hard rock shaft drilling
    Patent number: 5125692
    Abstract: A dry, vertical shaft drilling system including an inverted raiseboring cutterhead fitted with air nozzles and vacuum pickups. Weights are detachably stacked above the cutterhead. Cuttings are extracted through the weights into a swivel circumscribing the drill string. The swivel is a transition from the rotating cutterhead to the stationary extraction riser pipes disposed above the swivel. Non-rotating stabilizers stabilize the drill string.
    Type: Grant
    Filed: June 19, 1991
    Date of Patent: June 30, 1992
    Assignee: Inco Limited
    Inventors: Kirk M. Sinclair, John R. England