Patents by Inventor Matthew W. Mawhinney

Matthew W. Mawhinney 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).

  • Depth sensitive clutch mechanism for drill
    Patent number: 6543971
    Abstract: Driving engagement is obtained between an arbor held in a machine tool and a collet holder that supports a drill bit by locking balls that are secured in engagement with drive surfaces by a locking ring. A nose cone is adjustably attached to the front of the locking ring and when the nose cone bottoms out on the workpiece, continued movement of the drill bit assembly relative to the nose cone assembly causes the locking ring to allow the locking balls to disengage the collet holder after ½″ additional travel. Inner and outer springs reposition the clutch mechanism in its initial position for subsequent drilling operations.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: April 8, 2003
    Inventor: Matthew W. Mawhinney
  • Depth sensitive clutch mechanism for drill
    Publication number: 20020127070
    Abstract: Driving engagement is obtained between an arbor held in a machine tool and a collet holder that supports a drill bit by locking balls that are secured in engagement with drive surfaces by a locking ring. A nose cone is adjustably attached to the front of the locking ring and when the nose cone bottoms out on the workpiece, continued movement of the drill bit assembly relative to the nose cone assembly causes the locking ring to allow the locking balls to disengage the collet holder after ½″ additional travel. Inner and outer springs reposition the clutch mechanism in its initial position for subsequent drilling operations.
    Type: Application
    Filed: March 7, 2001
    Publication date: September 12, 2002
    Inventor: Matthew W. Mawhinney