| 摘要 |
<p>There is provided a dispensing apparatus in the form of a pump assembly for dispensing fluids, particularly viscous, pasty fluids in predetermined measured amounts. The assembly includes a discharge spout (40), a pump chamber (16), a housing (21) and a button (20) for varying the volume of the pump chamber to dispense fluid. An inlet valve assembly (30) controls ingress of fluid to the pump chamber so that the pump chamber is full when the button is in a rest position. The maximum volume of the pump chamber may be pre-set to set the dose of fluid dispensed by the device. The discharge spout (40) is arranged to dispense fluid unilaterally of the pump dispenser through an outlet valve (50).</p> |
