Patents by Inventor Charles Gllen Franks

Charles Gllen Franks 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).

  • Drawworks apparatus
    Patent number: 7210670
    Abstract: A drawworks having a main drum spool, a main drum shaft which passes through and is rotatably and concentrically supported by the main drum spool, an auxiliary drum spool, respective drum shafts passing through and rotatably and concentrically supported by the drum spools in a manner in which wireline pull from the spools is isolated therefrom, a clutch mechanism rotatably connected to the shafts and brake mechanisms respectively connected to the main drum spool and the auxiliary drum spool outside the working area of the drawworks.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: May 1, 2007
    Inventor: Charles Gllen Franks