Patents Assigned to H.J.G. McLean Limited
  • Refiner for fibrous material
    Patent number: 6402067
    Abstract: A pair of refiner members comprises respective refiner bars which cooperate to refine pulp. At least one the refiner bars extends in a spiral pattern for imparting a screw-like pumping action to the pulp. The refiner bars of the cooperating refiner members have different pitch to produce a differential pumping action and increase crossovers between the refiner members in order to improve refining. A sinuous curvature can also be introduced in the spiral pattern to further increase crossovers between the refiner members.
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: June 11, 2002
    Assignee: H.J.G. McLean Limited
    Inventor: David R. Webster
  • Cable stayed bridge construction
    Patent number: 5060332
    Abstract: A cable stayed bridge which includes a pair of towers on either side of a gap and a roadway deck extending across the gap between the towers and cable stays fanning out from the top of each tower to separate longitudinally spaced load-bearing points on the decks such that a pair of cable stays extends from each load-bearing point on the deck to the tops of the respective towers with a span between towers 10 to 20 times tower height above the deck.
    Type: Grant
    Filed: June 21, 1990
    Date of Patent: October 29, 1991
    Assignee: H. J. G. McLean Limited
    Inventor: David R. Webster