Patents by Inventor Mark Clench

Mark Clench 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).

  • Diamond drag bit
    Patent number: 5213171
    Abstract: This invention consists of a diamond drag bit having a multiplicity of cutter studs secured within strategically positioned insert holes formed by a cutter face of the drag bit body. Means are provided to support the portion of the cutting end of each of the extended insert studs protruding above the bit face.
    Type: Grant
    Filed: September 23, 1991
    Date of Patent: May 25, 1993
    Assignee: Smith International, Inc.
    Inventors: Mark Clench, Saul N. Izaguirre
  • Matrix diamond drag bit with PCD cylindrical cutters
    Patent number: 5056382
    Abstract: A drag bit mold fabricated from high temperature resisting material is machined to accept cylindrically shaped polycrystalline diamond cutters (PCD) having tungsten carbide bodies. Each of the multiple PCD matrix pockets in the mold is formed by two independent non-parallel end mill passes. The first end mill cut defines the PCD cutter position in the cutting face of the matrix diamond drag bit. The second end mill cut superimposed over the first end mill pocket creates a surrounding pocket which fills with powder metallurgy matrix material to provide support for the cylindrical cutter.
    Type: Grant
    Filed: December 20, 1990
    Date of Patent: October 15, 1991
    Assignee: Smith International, Inc.
    Inventor: Mark Clench