Patents Assigned to James Howden & Company Limited, a British Company
  • Filtering apparatus and method
    Patent number: 4776962
    Abstract: A filtering method and apparatus including a chamber having an inlet and an outlet and a mass of fibers interposed between the inlet and outlet and contained between a perforated base and piston. Structure is provided for reciprocating the piston relative to the base during backwash operation.
    Type: Grant
    Filed: August 3, 1987
    Date of Patent: October 11, 1988
    Assignee: James Howden & Company Limited, a British Company
    Inventor: Richard J. Wakeman