Patents Assigned to R. Goodwin International Ltd.
  • Wafer check valves
    Patent number: 4694853
    Abstract: A wafer check valve having an annular housing, closing flaps effective to close a passage through the housing and spring urged to a passage closing position, the flaps being mounted on one or more hinge pins, the or each hinge pin extending at each end into a bore in an insert, the inserts being received in respective slots in the body and including means retaining the inserts in the slots without movement.
    Type: Grant
    Filed: May 2, 1985
    Date of Patent: September 22, 1987
    Assignee: R. Goodwin International Ltd.
    Inventor: Richard S. Goodwin
  • Agitating particulate solids
    Patent number: 4650342
    Abstract: The invention relates to a method of and apparatus for agitating and pumping particulate solids which are settled in and beneath a liquid by rotating a vaned impeller which is attached to a pump such that pressure waves are set up in the liquid and the settled solids, the solids being loosened so as to be pumpable, and the agitator being arranged to impart to its surroundings an axial component of movement towards the pump inlet.
    Type: Grant
    Filed: May 19, 1986
    Date of Patent: March 17, 1987
    Assignee: R. Goodwin International Ltd.
    Inventor: John Goodwin