Patents Represented by Attorney, Agent or Law Firm Wan Yee Chung
  • Screw pump having a thermal shield
    Patent number: 6537049
    Abstract: A screw pump has two parallel shafts mounted in a pump body, each shaft thereon and each rotor has at least one helical vane or thread. When the helical vanes or threads inter mesh causing a fluid to be pumped from an inlet towards an outlet of the pump. The bearings associated with each shaft are being positioned in cavities within the first and second rotors which are sealed at their ends closest to the pump inlet. A thermal shield is provided between the bearing arrangements and the internal cavity surfaces.
    Type: Grant
    Filed: November 7, 2001
    Date of Patent: March 25, 2003
    Assignee: The BOC Group, plc
    Inventors: Nigel Paul Schofield, Michael Henry North