Patents by Inventor Gilbert M. Lea

Gilbert M. Lea 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).

  • Hand-held tool for drill bit sharpening
    Patent number: 6280307
    Abstract: A hand-held trigger grip drill bit holder for drill bit sharpening includes a hand grip adapted to be held in a user's hand and a clamp on the hand grip adapted to hold a drill bit for sharpening the tip on a grinding wheel. A trigger on the hand grip moves the clamp from a normally open position to a closed position to hold the drill bit. A sight is provided on the grip to allow visual alignment of the tip of the bit for proper sharpening of the cutting edges. In one embodiment, the sight takes the form of a loop. In another embodiment, the bubble isn't intended as a sight.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: August 28, 2001
    Inventor: Gilbert M. Lea
  • Hand-held drill bit sharpening tool
    Patent number: 6001002
    Abstract: A hand-held drill bit sharpening tool includes a hand grip portion adapted to be held in a user's hand and a clamp on the grip portion adapted to hold a drill bit for sharpening the tip on a grinding wheel. The bit is held in the clamp by thumb pressure of the user. A sight on the grip portion allows visual alignment of the tip of the bit for proper sharpening of the cutting edges. The sight is adjustable to accommodate different drill bits. A guard is provided on the tool for protecting the user's hand from the grinding wheel.
    Type: Grant
    Filed: March 18, 1998
    Date of Patent: December 14, 1999
    Inventor: Gilbert M. Lea