| 摘要 |
<p>A metering pump (P) including a motor compartment (1) with a drive piston (2) movable within a drive chamber (3) having an inlet (4) and an outlet (5) for a main liquid, as well as control means (D) for controlling the movement of the piston (2); and a metering compartment (6) with a metering piston (7) in a metering chamber (8) connected to the drive chamber (3) and provided with an inlet (10) for a secondary liquid, said metering piston (7) being driven by the drive piston (2). The metering chamber (8) comprises its own outlet (24) separate from the outlet (5) of the drive chamber, and is separated from the drive chamber (3) by a stretchable tubular member (T) of which one end (27) is sealingly connected to a portion (13) secured to the drive chamber (3), while its other end (28) is sealingly connected to the metering piston (7).</p> |
