Patents by Inventor Clark P. Stafford

Clark P. Stafford 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).

  • Hydraulic powered capstan attachment
    Patent number: 6830235
    Abstract: A hydraulic capstan to pull electric or communication wire through conduit or open trenches over long distances from a stationary position. The capstan is powered by a hydraulic motor. An operator can activate the motor from inside the cab of a vehicle to turn the capstan. The rope attached to the wire is wrapped around the capstan. When the rope is pulled tight on the turning capstan, the rope comes on one side and off the other side, pulling the wire load.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: December 14, 2004
    Inventor: Clark P. Stafford
  • Hydraulic powered capstan attachment
    Publication number: 20030155563
    Abstract: A hydraulic capstan to pull electric or communication wire through conduit or open trenches over long distances from a stationary position. The capstan is powered by a hydraulic motor. An operator can activate the motor from inside the cab of a vehicle to turn the capstan. The rope attached to the wire is wrapped around the capstan. When the rope is pulled tight on the turning capstan, the rope comes on one side and off the other side, pulling the wire load.
    Type: Application
    Filed: February 20, 2003
    Publication date: August 21, 2003
    Inventor: Clark P. Stafford