EP 0465474 B1 19930901 - CONTROL ARRANGEMENT FOR A TWO-CYLINDER PUMP FOR THICK MATERIALS
Title (en)
CONTROL ARRANGEMENT FOR A TWO-CYLINDER PUMP FOR THICK MATERIALS
Publication
Application
Priority
DE 3910120 A 19890329
Abstract (en)
[origin: WO9011449A1] A servo control for a two-cylinder pump for thick materials comprises two delivery cylinders (1, 1') which open through front-face openings (2, 2') into a material dispenser container in which a hydraulically operated shunt pipe (3) is arranged. On the inlet side, the shunt pipe (3) can be connected alternately to the openings (2, 2') of the delivery cylinders (1, 1'), freeing the other opening, and on the outlet side it can be connected to a delivery line (4). The delivery cylinders (1, 1') are connected to hydraulic drive cylinders (5, 5') which are actuated by at least one push-pull hydropump (6). At the end of each pressure stroke in the delivery cylinders (1, 1'), a reversal process of the shunt pipe (3) is initiated. The delivery volume of the hydropump (6) is varied automatically in accordance with the switching states inside the pump for thick materials by the use of a switching element.
IPC 1-7
IPC 8 full level
F04B 49/00 (2006.01); B28C 7/16 (2006.01); F04B 9/10 (2006.01); F04B 9/117 (2006.01); F04B 15/02 (2006.01)
CPC (source: EP US)
B28C 7/163 (2013.01 - EP US); F04B 9/1176 (2013.01 - EP US); F04B 9/1178 (2013.01 - EP US); F04B 15/023 (2013.01 - EP US); Y10S 417/90 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR IT NL
DOCDB simple family (publication)
WO 9011449 A1 19901004; DE 3910120 A1 19901004; DE 59002577 D1 19931007; EP 0465474 A1 19920115; EP 0465474 B1 19930901; ES 2045908 T3 19940116; JP H04504292 A 19920730; US 5238371 A 19930824
DOCDB simple family (application)
EP 9000099 W 19900118; DE 3910120 A 19890329; DE 59002577 T 19900118; EP 90903351 A 19900118; ES 90903351 T 19900118; JP 50346590 A 19900118; US 76864991 A 19911127