Patents by Inventor Grant Norman Colbert

Grant Norman Colbert 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).

  • Method for introducing and blowing rock dust and device for carrying out said method
    Patent number: 7048340
    Abstract: In a method for introducing and blowing rock dust to bind carbon dust during advance working or coal mining using an advance working or mining machine, respectively, the cutting tools are retracted relative to a displaceable machine frame after having cut an outbreak or excavation. During the displacement of the machine frame into a new outbreak or excavation position, rock dust is blown onto the roof and lateral-wall surfaces laid bare by the cutting tools, through nozzles arranged on the machine frame by the aid of pressure medium such as compressed air. The advance working or mining machine used to carry out this method includes a displaceable machine frame and a carriage movably mounted on the machine frame and carrying a pivotable cantilever arm on which cutting heads or rolls are rotationally mounted, and a loading device intended to receive cut or broken material.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: May 23, 2006
    Assignee: Voest-Alpine Bergtechnik
    Inventors: Egmont Lammer, Kurt Schaffer, Grant Norman Colbert
  • Method for introducing and blowing rock dust and device for carrying out said method
    Publication number: 20040145231
    Abstract: In a method for introducing and blowing rock dust to bind carbon dust during advance working or coal mining using an advance working or mining machine, respectively, the cutting tools are retracted relative to a displaceable machine frame after having cut an outbreak or excavation. During the displacement of the machine frame into a new outbreak or excavation position, rock dust is blown onto the roof and lateral-wall surfaces laid bare by the cutting tools, through nozzles arranged on the machine frame by the aid of pressure medium such as compressed air. The advance working or mining machine used to carry out this method includes a displaceable machine frame and a carriage movably mounted on the machine frame and carrying a pivotable cantilever arm on which cutting heads or rolls are rotationally mounted, and a loading device intended to receive cut or broken material.
    Type: Application
    Filed: December 18, 2003
    Publication date: July 29, 2004
    Applicant: VOEST-ALPINE Bergtechnik Gesellschaft m.b.H.
    Inventors: Egmont Lammer, Kurt Schaffer, Grant Norman Colbert