Patents by Inventor Robert F. Stager

Robert F. Stager 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).

  • Adjustable torque control winch system
    Patent number: 4276498
    Abstract: System for maintaining a preselected constant torque on a loaded reel of a winding mechanism. The system includes a d.c. motor wherein both the armature and field windings are adapted for independent rotation about a common axis. The field winding is coupled to the reel so that the reel rotates at a velocity proportional to that of the field winding. A drive motor establishes a constant speed rotation of the armature winding. A torque control drives constant currents through the armature and field windings of the motor. The amplitudes of the armature and field currents are preselected so that a constant torque is maintained at the reel irrespective of variations of the load.
    Type: Grant
    Filed: December 9, 1977
    Date of Patent: June 30, 1981
    Assignee: Brown & Root, Inc.
    Inventors: Robert F. Stager, Graham J. Blight