Patents Represented by Law Firm Karquist Sparkman Campbell Leigh & Whinston
  • Patent number: 5336054
    Abstract: A pumping arrangement for pumping water to ships comprises a pump having an inlet and an outlet, a level sensor, connectable to the outlet, for insertion into a water tank, and a control arrangement associated with the level sensor. The control arrangement de-activates the pump in response to a signal from the level sensor so as to avoid over-filling of the tank. The pumping arrangement further comprises transmitting means to transmit a signal at the same time as the control arrangement de-activates the pump. Such a signal is transmitted to, for example, a paging unit. Several pumping arrangements may be used at once with several ships, the paging unit being adapted to inform the operator when a given pumping arrangement has filled a water tank.
    Type: Grant
    Filed: June 18, 1992
    Date of Patent: August 9, 1994
    Assignee: Port of Singapore Authority
    Inventors: Khen H. Seah, Yeow S. Heng, Chong W. Chua
  • Patent number: 5076894
    Abstract: Dewatering apparatus for papermaking machines, such as suction boxes, are provided with spaced cover elements of a composite structure. The cover elements include ceramic cover strips which engage the porous conveyor belt that conveys the paper web and are separated by drainage slots. The ceramic cover strips are bonded to support members of fiber-reinforced plastic. The cover elements are mounted on metal cross braces by mounting projections on the support members which slide into mounting slots of the same shape on the cross braces for attachment thereto without threaded fasteners or welding. The mounting slots and mounting projections may be of an interlocking shape, such as a dovetail shape or a T-shape, which prevents vertical movement of the cover elements toward or away from the conveyor belt while allowing horizontal sliding movement for insertion and removal of the cover elements into the mounting slots of the cross braces.
    Type: Grant
    Filed: April 30, 1991
    Date of Patent: December 31, 1991
    Inventors: Holt W. Simmons, Martin P. Franck, Danial L. Perry