A FLUID DISPENSER

摘要

A fluid dispenser (1) for dispensing a metered volume of a fluid product (2) having a storage chamber (57) for storing the fluid product in; a dispensing outlet (27) through which the fluid product is dispensable from the dispenser; a metering chamber (73) which is adapted to provide the metered volume of the fluid product for dispensing through the dispensing outlet by movement of the metering chamber between a contracted state and an expanded state , movement of the metering chamber from its contracted state to its expanded state placing the metering and storage chambers in fluid communication to enable the metering chamber to receive from the storage chamber an excess volume of the fluid product comprising the metered volume and a surplus volume; and a bleed arrangement (55a, 55b) adapted to bleed the surplus volume of the fluid product from the metering chamber. The metering chamber is defined by a boundary wall having first (43) and second (28) sections, the first and second sections being movable relative to one another to move the metering chamber between the expanded and contracted states. At least one transfer port (55a, 55b) is formed in the first section of the metering chamber boundary wall through which the fluid product is transferable from the storage chamber to the metering chamber when the metering chamber moves to the expanded state. An outlet port (33) is provided in the second section through which the fluid product is transferable from the metering chamber to the dispensing outlet.