| 摘要 |
<p>The invention concerns a pump comprising a body (1) designed to communicate in its lower part with a dip tube (2) through an intake valve and to be connected in its upper part to the rim of a reservoir (R) and containing a metering chamber (10) sealingly closed in its upper part with compression means provided with an outflow valve and a return member capable of being actuated by manual pressure on a dispensing head (T) and provided with a discharge duct (C). The invention is characterised in that said return member comprises an elastically deformable inner diaphragm (3) borne by the dispensing head (T) and co-operating with a rigid cup (4) fixed beneath the head (T) and defining with said diaphragm (3) the metering chamber (10).</p> |
