| 摘要 |
The device according to the invention comprises a cylindrical metering chamber (10) of circular section and with an approximately horizontal axis, which, in its upper part, has an aperture (14) opening out into a reservoir (16) filled with product to be metered (12), and which communicates with an outlet channel (18) in which a slide valve (20) moves periodically between a high closing position and a low end-of-metering position; a vane (26) extending radially along a shaft (28) and capable of being driven with a rotary movement of controlled amplitude, during which the free end (30) of the vane (26) sweeps the cylindrical internal surface (32) of the metering chamber (10); and a flap (34) capable of translational movement and of entering the metering chamber (10) periodically to delimit a wall by tangential contact with the said shaft (28), and then withdrawing to allow a complete revolution of the vane (26). |
