Patents Assigned to Weir Pumps Ltd.
  • Pump with seal cooling means
    Patent number: 5088891
    Abstract: A pump for high temperature liquid includes a duct interconnecting the suction inlet space, and the annular clearance space between the shaft and the pressure housing at a point immediately adjacent to the seal around the shaft. During hot stand-by uniform thermosyphon circulation of liquid occurs from the suction inlet space through the annular clearance space and back to the suction inlet via the duct, which helps prevent thermal stresses being set up in the shaft.
    Type: Grant
    Filed: April 25, 1990
    Date of Patent: February 18, 1992
    Assignee: Weir Pumps Ltd.
    Inventors: Robert W. Brown, John M. Taylor