Pumps – Correlated pump and motor or clutch control – Pump distributor control
Patent
1991-01-18
1991-11-19
Bertsch, Richard A.
Pumps
Correlated pump and motor or clutch control
Pump distributor control
417342, 417900, 137 99, F04B 910, F04B 3502, G05D 1100
Patent
active
050662031
ABSTRACT:
In an apparatus for pneumatically discharging concrete fed hydromechanically in a dense stream, using for the hydromechanical feed a concrete pump having a hydraulic drive comprising at least two cylinders with opposed pistons, said pump having synchronization control by a displacer circuit conducting the working medium displaced by a piston, and having a dosing means for an additive serving as an accelerating agent, whose drive is connected to the hydraulic circuit of the concrete pump drive, the inventive proposal is that the drive of the dosing means is connected to the displacer circuit and designed as a reciprocating piston drive whose absorption amount corresponds to the displacement amount of the working pistons and is added in both directions to the displacement amount of each working piston.
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Coja Joachim
Simnovec Andre J.
von Eckardstein Karl-Ernst
Bertsch Richard A.
Friedrich Wilh. Schwing GmbH
Savio, III John A.
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