| 摘要 |
The invention concerns a device for dispensing a dose of liquid or gel products comprising a dispensing head (1) axially mobile mounted on a produc t reservoir and provided with an outlet conduit (11) and a metering chamber (2 0) delimited by an intake valve (22) and by a piston (3) whereof the rod (31) i s connected to said head (1) and which is equipped with an exhaust valve (32). The invention is characterised in that the rod (31) of the piston (3) extend s inside the chamber (20) through a projecting lower end (31a) providing seale d locking of the intake valve (22) when the head (1) is in low position.</SDOA B>
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