| 摘要 |
A dispenser includes a housing holding an assembly, including a liquid reservoir, a pump for dispensing the fluid product, and an outlet nozzle. The pump includes a liquid chamber for containing a dose of the liquid product and a pressurizing device which allows liquid product to be drawn into or expelled from the liquid chamber. The dispenser further includes a shunting chamber including a first aperture allowing flow access to the reservoir, a second aperture allowing flow access to the outlet nozzle, and a third aperture allowing flow access to the liquid chamber. The third aperture is disposed off-axis with respect to the first and second apertures. The shunting chamber further includes a mechanically actuated governing device that has two states, one defining a flow path between the first and third apertures and one defining a flow path between the third and second apertures. |
| 主权项 |
1. A method of conducting a maintenance operation on a dispenser for dispensing a fluid product, the dispenser comprising a housing for accommodating an assembly, the assembly comprising:
a liquid reservoir, for containing a liquid product; a pump, connectable to the reservoir, for dispensing the fluid product using the liquid product as an input; an outlet nozzle, serving to convey and dispense the fluid product from the pump,whereby the pump comprises:
a liquid chamber, for containing a dose of the liquid product obtainable from the liquid reservoir, with an associated first compressor that allows liquid product to be drawn into or expelled from the liquid chamber; an air chamber, for containing a dose of air, with an associated second compressor that allows air to be drawn into or expelled from the air chamber,the method comprising:
opening the housing; removing used parts comprising at least the liquid reservoir; replacing the removed parts by replacement parts; and closing the housing,whereby, in said removal/replacement operation, at least one of the liquid chamber and air chamber is left in place in the housing, together with its associated compressor. |
