Patents Assigned to Lifetime Carbide Company
  • Patent number: 4061057
    Abstract: A plurality of individual, pre-formed cutting tips attached to one another in an adjoining series to form an elongate stick of tips are utilized for sequentially attaching the tips to the teeth or cutting portions of cutting tools. Each tip in the stick has a commonly oriented contact surface for attachment to the cutting tool, and a separate pre-formed cutting edge that forms the cutting edge of the tool once the tip has been attached. Attachment of a tip to a cutting tool is accomplished by positioning the contact surface of the lead tip in a stick proximate the tool, and severing the connection between the tip and the remainder of the stick. The tips forming the stick are preferably attached to one another by a meltable adhesive spread over their respective contact surfaces, such adhesive having a melting point lower than that of the tips. The respective tips in the stick are operatively connected to separate teeth or tools by the same adhesive.
    Type: Grant
    Filed: June 23, 1976
    Date of Patent: December 6, 1977
    Assignee: Lifetime Carbide Company
    Inventor: Gorman D. Gray
  • Patent number: 4055204
    Abstract: An adjustable wobble dado assembly having a plate-like circular blade, a pair of inner plate members fixedly mounted on either side of the blade having generally parallel outer surfaces and complementary inner surfaces for holding the blade at an inclined position relative to the outer surfaces, and a pair of interconnected outer plate members on either side of the inner plate members having parallel outer surfaces and complementary inner surfaces inclined relative to the outer surfaces and bearing rotatably against the inner plate members. Each inner plate member has an inwardly tapering central aperture for rotatably receiving a respective cylindrical hub of an outer plate member. Each cylindrical hub extends along an axis perpendicular to the outer surface, rather than the inclined inner surface, of the outer plate member, such axis also being coincident with the axis of an arbor bore extending through the hub.
    Type: Grant
    Filed: November 22, 1976
    Date of Patent: October 25, 1977
    Assignee: Lifetime Carbide Company
    Inventors: Fred G. Gunzner, Dale Edwards, John A. Lanning