Patents by Inventor Daniel E. Warthen

Daniel E. Warthen 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).

  • Flexible drill chuck drive
    Patent number: 4345445
    Abstract: A flexible shaft drive for drill chucks is disclosed. The flexible drive of the present invention comprises a flexible shaft for extending between an electric drill and a chuck for holding drills or other tools. A support sleeve is provided which encircles the chuck for rotatably supporting the chuck during use. In a preferred embodiment a bearing is interposed the chuck and the sleeve to aid in supporting the chuck during use.
    Type: Grant
    Filed: January 14, 1980
    Date of Patent: August 24, 1982
    Inventor: Daniel E. Warthen