Patents by Inventor Joseph R. Ditzig

Joseph R. Ditzig 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).

  • Down hole drill improvement
    Patent number: 4821812
    Abstract: A fluid impact tool is disclosed of the type commonly known as a down-the-hole drill for drilling of rock. The improvement herein described increases deep hole drill performance by providing a means for accumulating piston return air in a traveling air pocket found on the piston. This effectively increases the piston front end volume so as to decrease the effect of the front end air cushion and thereby increase impact. This is particularly effective during operation with increased back pressure such as found in deep holes.
    Type: Grant
    Filed: September 8, 1988
    Date of Patent: April 18, 1989
    Assignee: Ingersoll-Rand Company
    Inventor: Joseph R. Ditzig
  • Erosion resistant rock drill bit
    Patent number: 4730682
    Abstract: Disclosed herein is an erosion resistant down hole rock drill bit which utilizes a radial distribution of carbide cutter bits or buttons about the exhaust hole. This minimizes carbide wash or removal of base metal which retains the carbide and thereby extends bit life.
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: March 15, 1988
    Assignee: Ingersoll-Rand Company
    Inventor: Joseph R. Ditzig