| 摘要 |
The invention concerns a liquid or gel product dispenser, comprising a reservoir (R) supporting a pump body ( 1 ) including in its lower part an intake valve ( 2 ) and provided with a piston ( 3 ) mobile along an axis, defining with said body a metering chamber communicating with at least an ejection orifice defined in an axially mobile dispensing nozzle at the end of the reservoir; said piston is coupled by friction with said dispensing nozzle, which is axially mobile in both directions by manual actuation, relative to said reservoir; said metering chamber comprises a lower section ( 10 a) and an upper section ( 10 b), both sections communicating via a conduit ( 30 ) arranged across said piston and a closure valve ( 5 ) is arranged between said piston and said nozzle.
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