Patents Assigned to Permian Research Corp.
  • Rotary extruder with internally heated rotor
    Patent number: 5033861
    Abstract: A rotor assembly for use in a rotary extruder, comprising a rotor rotatably mounted inside a barrel by means of drive and free end bearing assemblies; a coaxial longitudinal bore extending into the rotor from its free end; a conduit disposed within the bore defining a longitudinally extending annulus therebetween; and rotatable means providing fluid communication between a heating medium inlet and the rotor bore through the longitudinally extending annulus, and between the annulus and a heating medium outlet through the conduit.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: July 23, 1991
    Assignee: Permian Research Corp.
    Inventors: Granville J. Hahn, Sammy K. Flud