Abstract: A pump unit which includes a pipe, a flexible bladder inside the pipe, an operating volume between an outer surface of the bladder and an opposing inner surface of the pipe, a valve arrangement to introduce pressurised water into the operating volume and to allow pressurised water to flow from the operating volume and another valve arrangement to allow slurry to flow into the interior of the bladder as water is expelled from the operating volume and to—allow slurry to flow from the bladder when water is introduced into the operating volume.

Abstract: An electrical energy generating system in which high pressure slurry is used to expel water, alternately from two bladders, which is used to power a turbine which drives a generator.

Abstract: A valve with a housing (12) in which is formed a chamber (14), an inlet (16) to the chamber, an outlet (18) from the chamber which is at a right angle relative to the inlet, a metallic valve seat (90) at the inlet, a resilient valve seal (100) mounted to the valve seat at the inlet and a spherical valve member (40) inside the chamber.

Abstract: An intermediate bulk container includes a flexible storage container, a rigid rectangular base member including a plurality of pole engaging formations on its upper surface which are arranged about its periphery, a plurality of poles, the lower end of each of which is releasably engageable with a pole engaging formation on the base so that the poles collectively provide a support cage for the storage container, a rigid pole location member (10) which includes a central opening through which the support container may be filled and a plurality of pole engaging formations with which the upper ends of the poles are releasably engageable, and bracing elements connecting a pair of poles on at least two adjacent sides of the cage to each other for holding the poles, in the planes in which they are located in the assembled container, perpendicular to the base and pole locating member.

Abstract: An electrical energy generating system in which high pressure slurry is used to expel water, alternately from two bladders, which is used to power a turbine which drives a generator.

Abstract: A rotational moulding machine includes three mould manipulator arrangements and a rotatable carrousel on which the manipulators are mounted for indexed rotation between heating, cooling and mould loading stations. Each manipulator includes a rectangular frame, stub axles on the frame which are rotatable in supports on the carousel on a first axis, mould locating element in the frame which is rotatable on a second axis normal to the first and devices for manipulating a mould in the frame on both axes. The machine includes a crane beam over the carrousel which overlies the heating and cooling station positions on the carrousel, a heating chamber, a wall enclosure, and a crane for lowering the heating chamber and wall enclosure over manipulators on the carrousel at the heating and cooling stations and for lifting them clear of the manipulators to enable them to be indexed to the next station.

Abstract: An intermediate bulk container includes a flexible storage container, a rigid rectangular base member including a plurality of pole engaging formations on its upper surface which are arranged about its periphery, a plurality of poles, the lower end of each of which is releasably engageable with a pole engaging formation on the base so that the poles collectively provide a support cage for the storage container, a rigid pole location member (10) which includes a central opening through which the support container may be filled and a plurality of pole engaging formations with which the upper ends of the poles are releasably engageable, and bracing elements connecting a pair of poles on at least two adjacent sides of the cage to each other for holding the poles, in the planes in which they are located in the assembled container, perpendicular to the base and pole locating member.

Abstract: This invention relates to a fluid transfer system including two elongated fluid transfer chambers, fluid inlet and outlet arrangements at each end of each chamber, oppositely directed one-way inlet and outlet valves in the inlet and outlet arrangement at a first end of each chamber for controlling the flow of a driven fluid into and out of the chamber, oppositely direted inlet and outlet controlled valves in the inlet and outlet arrangement at the second end of each chamber for controlling the flow of a drive fluid into and out of the chamber, a pressure balancing arrangement including a port in each of the controlled valves, an actuator on each controlled valve which is adapted to open and to close the valve and the pressure balancing port in the valve, and a control system which is connected to the actuators of each of the controlled valves for proportionally opening and closing the controlled inlet valves of each chamber in exact opposite phase to each other and for opening and closing the controlled chamb