| 摘要 |
A pre-compression pump for dispensing metered quantities of fluid, said pump including a piston (1) secured to or integral with an actuating rod (2) and slidably-received in a pump body (3) including a pump chamber (10) defined between an inlet valve (11) and an outlet valve (12), said pre-compression pump being characterized in that, when the pump is actuated, said outlet valve (12) is urged towards its closed position by the pressure of the fluid contained in the pump chamber (10), and in that, at the end of the actuating stroke of the pump, a lever element (30) moves said outlet valve (12) towards its open position to enable the fluid contained in the pump chamber (10) to be expelled.
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