Abstract: A liquid reservoir comprising a container (20) forming a chamber for holding the liquid (27). The container has a top wall (23) that closes the upper end of the chamber, a liquid outlet (35) in fluid communication with a lower en d of the chamber, and an air supply duct (47) through which air can enter the lower end of the chamber. In use, the reservoir finds an equilibrium position in which, due to a reduction in pressure in an air space (29) formed above the liquid (27) at the closed, upper end of the chamber, the column of liquid in the chamber is supported by atmospheric pressure acting at the opening of the air supply duct (47) to the lower end of the chamber. This opening is achieved by breaking a frangible seal (32) across the duct (47) by the axial insertion of the liquid outlet (35). While the seal was unbroken the container offered a self-contained capsule of liquid for replacement fitting with the liquid outlet portion.

Abstract: A liquid delivery device is particularly suited for dosing a toilet bowl with cleaning agents. Liquid from a reservoir flows through an inner sleeve of a connector into a cup until the liquid level reaches the mouth of the inner sleeve. Web is perforated so that the space in cup is open to atmosphere. Liquid is drawn from the cup by a capillary formed between the wall of cup and the connector and delivered to a porous pad. Flushwater runs over pad and supporting plate to disperse the liquid into a toilet bowl.

Abstract: A dispensing means (10) for delivering a dose of a first liquid into a second liquid is provided, the dispensing means comprising an enclosure (12) for the first liquid, and valve means (16), the dispensing means being operable such that raising a level (114) of a second liquid relative to the dispensing means so as to subject the dispensing means to hydrostatic pressure causes a dose of the first liquid to be displaced from the enclosure (12) to establish a column (118) of the first liquid that acts on the valve means, and subsequent lowering of the level (114) of the second liquid relative to the dispensing means so as to reduce the hydrostatic pressure acting on the valve means (16) causes the valve means to deliver the dose.

Abstract: A device for dosing a liquid product into a flow of liquid, the device comprising a dosing chamber (6) for the liquid product, said chamber having a porous wall (26) through which the liquid product is transported when the porous wall is within the flow of liquid but which retains the liquid product within the dosing chamber when the liquid flow is removed, and a constant head construction (14,30,36) such that the hydrostatic pressure of the product in the chamber (6) is substantially independent of the head of liquid product above it.

Abstract: Dispensers of volatile liquids have a liquid reservoir (10) feeding a downwardly extending dispersal screen (2) formed by spaced threads or groups of threads (20) down which the liquid (L) flows as it is vaporised the screen having a large thread; void ratio whereby a relatively small quantity of liquid is exposed, so that the liquid on the screen is constantly replaced. In other dispensers utilizing a downwardly extending dispersal screen (30; 42; 82; 110; 120; 160). a capillary wick (38; 52; 94; 140; 172) leads the liquid upwards from a reservoir (34; 50; 92; 136; 166) to produce a syphon effect. The amount of liquid on the screen (160) may be limited by an arrangement (184; 186) for interrupting the syphon flow. The liquid flow to a dispenser screen (42; 82; 110) may also be regulated by taking liquid from a supply container (48; 90; 108) into a reservoir chamber (50; 92; 136) having a constant liquid level, whereby the rate of liquid flow is independent of the level in the supply container.

Abstract: A liquid reservoir comprising a container (20) forming a chamber for holding the liquid (27). The container has a top wall (23) that closes the upper end of the chamber, a liquid outlet (35) in fluid communication with a lower en d of the chamber, and an air supply duct (47) through which air can enter the lower end of the chamber. In use, the reservoir finds an equilibrium position in which, due to a reduction in pressure in an air space (29) formed above the liquid (27) at the closed, upper end of the chamber, the column of liquid in the chamber is supported by atmospheric pressure acting at the opening of the air supply duct (47) to the lower end of the chamber. This opening is achieved by breaking a frangible seal (32) across the duct (47) by the axial insertion of the liquid outlet (35). While the seal was unbroken the container offered a self-contained capsule of liquid for replacement fitting with the liquid outlet portion.

Abstract: A dispenser for a volatile liquid is intended to be used in a vehicle. It comprises a substantially closed conical container (2) for the liquid, and a pair of plates (14, 28) closing the top of the container form between them a capillary interface (88) leading to a disseminating porous element (42). While the vehicle is in movement, liquid is thrown upwards and outwards by accelerations of the vehicle to the plates and so to drawn through the capillary passages at the interface to reach the porous element. The container is pivoted at its lower region to be tiltable through a similar angle to tilt of the liquid surface, so that all the liquid can reach the plates and so be dispensed.