Abstract: A device for dosing a flowing fluid is disclosed, the device comprising a casing having an inlet and an outlet. Within the casing there is a supply of the additive with which the flowing fluid is to be dosed, the additive being within a bag. The bag is mounted on a plate which has a passage in it. A needle valve controls flow of additive through the passage. When fluid flows from the inlet through the cylindrical gap to the outlet, the head of the valve is urged by the flowing liquid in the direction which opens the passage. This allows additive to flow from the bag under the influence of the external pressure applied thereto as a result of fluid under pressure having entered the liner through an opening in an end wall of the liner. The degree to which the valve can open the passage is controlled by an eccentric cam which is operable by a knob from externally of the casing.

Abstract: A fuel tank construction comprising a tank and a sump is disclosed which construction includes a float operated water separator. The separator operates automatically to drain water which has separated out and accumulated at the bottom of the sump. The separator is in the sump which is secured to the underside of the tank. The tank has an opening through which the sump and tank communicate, and there is a normally open one-way valve in this opening. This valve prevents water and solids flowing back into the tank from the sump if the tank construction is inverted. Within the tank there is a filter through which fuel flows to reach the fuel outlet line. The filter is normally spaced along the tank from said opening but can be displaced to a position overlying the opening when access to it through said opening is required for servicing purposes.

Abstract: A device for separating two liquids one of which is heavier than the other. The device comprises a main chamber (120) in which there is a float (128). The float is such that it sinks in the lighter of the liquids and floats in the heavier. A control chamber (140) having a fixed wall part (142) and a movable wall part (144) is provided. The movable wall part is subjected to the pressure existing in the main chamber which urges the movable wall part in the direction which reduces the volume of the control chamber. A restricted inlet (146) places the control chamber and main chamber in communication. There is an outlet (158) from the control chamber which is normally closed by a valve (168). The valve is opened, mechanically or electrically, when the float rises upon heavier liquid accumulating in the main chamber. A valve seat (160) surrounds an outlet (156) from the main chamber.

Abstract: A plant watering device comprises a receptacle for water with a tube extending downwardly from the receptacle. The tube is packed with a fibrous or particulate medium which permits water to percolate downwardly through it. The lower end of the tube is of spike form to enable it to be pushed into the ground. The upper end of the tube communicates with the receptacle so that water flows into the tube from the receptacle. Below the receptacle the tube has one or more outlets so that water percolating down the tube can escape into the surrounding earth.

Abstract: A fluid flow control valve in which flow from an inlet (14) to an outlet (16) is controlled by engagement between a surface (92) and a seat (90). The surface (92) is displaced from the seat (90) when a closure member (44) is lifted to permit flow from a control chamber (26) through a bore (42). The resultant pressure drop in the chamber (26) enables pressure externally of the chamber (26) to displace the wall (34) which lifts the spigot 40 and hence the surface 92. When the closure member (44) re-seats, the chamber (26) can fill through a bore (56) and the wall (34) returns to its initial condition to close the valve. An operating member (66) protrudes through a shower rose (20). When the member (66) is pushed up, the piston (70) attempts to slide in the cylinder (74) and causes a pressure increase which thus displaced the cylinder (74 ) and hence the closure member (44).

Abstract: A timer in which the re-filling of a control chamber (26) via its inlet (56) causes displacement of a resilient wall (34). A surface (62) of the wall (34) thus engages a valve seat (64) to shut-off the inlet (14) of the timer from its outlet (20). To open the timer a cap (88) is depressed. A stem (90) depending from the cap depresses an element (44) against the action of a spring (60). The element (44) is thus displaced to open the outlet bore (42) of the chamber (26). Water pressure in the casing (12) acting on the wall (34) then urges it in the direction which separates the surface (62) from the seat (64). A series of stop surfaces (86) co-operate with a stop element (100) of the cap (88). The surfaces (86) are at different heights. The distance through which the cap (88) can be depressed is varied by rotating it so that the element (100) co-operates with a selected surface (86).

Abstract: A device for dosing a flowing fluid including a cylindrical casing which can be opened and which has an inlet at one end and an outlet at the other. A cylindrical liner is within the casing, there being a perforated wall at the inlet end of the liner. The outlet end of the liner is partly closed by a plate fixed to the casing. A spike having a shank and a head is fixed to the plate, the head being within said liner and the shank passing through the plate. A bore passes through the shank and emerges through a conical surface of the head. There is an annular shoulder between the shank and the head. An additive cartridge comprises a bag and an element including a sleeve through which the spike passes when the cartridge is impaled on the spike. The element includes a flange for co-operation with said shoulder to prevent accidental removal of the cartridge from the spike.

Abstract: The invention relates to a fluid flow control valve of the type in which flow through the valve is controlled by movement of a chamber wall caused by fluid flowing into the chamber through a restricted inlet and a cleaning element is provided to clean the inlet. In this invention, the cleaning element is longer than the restricted inlet and is movable between a first position in which it does not extend through the restricted inlet and a second position in which it extends completely through the restricted inlet. The cleaning element is a rod-like element of self-supporting flexible synthetic plastics material and has a limited inherent rigidity enabling it to force dirt and scale from the restricted inlet.

Abstract: Apparatus for dosing a flowing fluid, particularly for dosing an airstream with lubricant. The apparatus includes a casing for connection into the fluid flow line and, within the casing, a cartridge with the additive therein. The cartridge comprises a bag and a nozzle, the nozzle including a metering bore and a spigot which closes the metering bore. Before the cartridge is placed in the casing for use, the spigot is removed so as to open the outlet end of the metering bore. The casing includes a cartridge plate having a stepped aperture therein, the step providing an axially facing shoulder, and the nozzle including a rib which inter-engages with said shoulder to locate the cartridge in the casing. There is a stop element in the bore which is positioned so that it is engaged by said spigot before the rib interengages with the shoulder if an operator attempts to push a nozzle into said bore without having removed the spigot.