An apparatus for charge-wise dosing a metered volume quantity of a flowing medium continuously supplied to the apparatus under delivery pressure.

摘要

An apparatus for charge-wise dosing a metered volume quantity of liquid medium to be supplied continuously under delivery pressure, comprising a pair of serially connected cylinder (2, 3) - and - piston (7, 8) assemblies of different diameters the cylinder blocks (2, 3) being arranged axially relatively to each other, forming a composite housing (1); a supply conduit (4) for the flowing medium connected to the smaller diameter cylinder block (2) and a filling nozzle (5) connected to the larger diameter cylinder block (3) and containing a discharge opening (6); a tube (10) operating as a piston memberfor reciprocation in the composite housing (1), which tube (10) is in direct communication with the smaller diameter cylinder block (2) and connected to the larger dima- ter cylinder block (3) via a passage (13) provided in the larger diameter piston (7). The tube (10) operating as piston member carries at least the larger diameter piston (7); a first valve (11) by means of which the passage (13) in the larger diameter piston (7) is closable and a second valve (12) by means of which the access to the filling nozzle (5) is closable; and means for operating the valves and control means therefor.