| 摘要 |
A fluid dispenser member designed to be associated with a fluid reservoir ( 50 ) and comprising: a chamber ( 1 ) in which the fluid is put under pressure, the chamber being provided with an inlet valve ( 161, 38 ) and with an outlet; a dispensing orifice ( 25 ); a main piston ( 133 ) in leaktight sliding contact inside a main cylinder ( 242 ) for the purpose of causing the volume of the chamber to vary; a pusher ( 20 ) that can be actuated to generate relative movement between the main piston and the main cylinder; and a differential piston ( 31, 32, 33 ) in leaktight sliding contact inside the pusher for the purpose of selectively unmasking the outlet of the chamber; said dispenser member being characterized in that it further comprises stroke-limiting means ( 28, 39 ) for limiting the stroke of the differential piston in the pusher, said stroke-limiting means being provided between the pusher and the differential piston.
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