Patents Assigned to March-Southwestern Corp.
  • Pulverizer mill high performance classifier system
    Patent number: 5605292
    Abstract: A high performance classifier system for use in a pulverizer mill (e.g., a mill used to crush large coal particles into small particles). The classifier system includes a cylindrical extension member with a roughened interior surface. Other permitted features include a converging/diverging orifice on the interior surface of the mill body, curved classifier vanes at the upper end of the classifier, and tilted vanes between the mill housing and the upper end of the classifier. Improvements in efficiency of particle separation are achieved.
    Type: Grant
    Filed: September 6, 1995
    Date of Patent: February 25, 1997
    Assignee: March-Southwestern Corp.
    Inventor: Joe H. Bunton
  • Spring canister for pulverizer
    Patent number: 5529253
    Abstract: A spring canister for use in a coal pulverizer to impart an axial load to a bracket assembly supporting a grinding wheel or roller. The axial load causes the bracket assembly to pivot downwardly to increase the grinding force between the wheel or roller and the grinding bowl.
    Type: Grant
    Filed: April 5, 1995
    Date of Patent: June 25, 1996
    Assignee: March-Southwestern Corp.
    Inventors: Louis J. Maillet, Matthew R. Brown, Joe H. Bunton
  • Mill sweep for pulverizers
    Patent number: 5480099
    Abstract: A brush-type mill sweep which is particularly suited for pyrite removal from the floor of a vertical spindle coal pulverizer. The mill sweep is secured at one end to the spindle or the shaft skirt, and the mill sweep includes a plurality of downwardly-extending cables which are flexible and resilient for removing ungrindable rejects from the floor of the pulverizer beneath the grinding bowl.
    Type: Grant
    Filed: June 27, 1994
    Date of Patent: January 2, 1996
    Assignee: March-Southwestern Corp.
    Inventor: Joe H. Bunton