Patents by Inventor John Carlos Lundholm

John Carlos Lundholm 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).

  • Drill adapter for drill having central and lateral cutting inserts
    Patent number: 7244081
    Abstract: A drill adapter has a resilient insert retaining portion at one end, a drive stem at the second end, and an adapter seating portion between the two. The insert retaining portion includes first and second resilient clamping members which are rotationally 180° apart. The resilient clamping members are separated by a narrow slit which communicates with an internal through bore extending across a diameter of the insert retaining portion. The seating portion includes a pair of planar abutment surfaces which are supported by a lower seating surface formed on the drill adapter seating portion, when the drill is assembled. The drive stem is provided with a pair of longitudinally extending drive slots. When inserted into an end bore formed at the operative end portion of a drill shaft, the drive slots receive complementary guides formed on an inner wall of the end bore.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: July 17, 2007
    Assignee: Ingersoll Cutting Tool Company
    Inventors: William Bennett Johnson, John Carlos Lundholm