Patents by Inventor David William Richley

David William Richley 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 Bit
    Publication number: 20090148250
    Abstract: A drill bit comprising a body including at least four flutes being formed on and extending along a longitudinal axis of the body and a web portion disposed between the at least four flutes. The flutes define a pitch length that is substantially the same as one another and the web portion has at least one web thickness. The ratio of the web thickness to the pitch length is within a range of about 14 to 25 percent.
    Type: Application
    Filed: December 5, 2007
    Publication date: June 11, 2009
    Inventors: Wayne Chappell, David William Richley, Nixon Tin Chi Lee