Patents by Inventor Robert Lloyd Hamilton

Robert Lloyd Hamilton 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).

  • Patent number: 5890851
    Abstract: An apparatus for increasing hand drill pressure includes a lever having a first end and a second end. A sleeve is affixed transversely to the lever spaced from the first end. An anchor line is provided having a first end and a second end. The first end of the anchor line is secured to the first end of the lever. A hook is provided on the second end of the anchor line. The sleeve slides over a handle of a hand drill. The hook is used to anchor the anchor line to a workpiece. The lever provides a mechanical advantage to increase the pressure with which the hand drill engages the workpiece.
    Type: Grant
    Filed: April 3, 1997
    Date of Patent: April 6, 1999
    Inventor: Robert Lloyd Hamilton