EP 0027743 B1 19850515 - CONTROL SYSTEM FOR A HYDRAULIC CIRCUIT INCLUDING A PLURALITY OF PARALLEL VARIABLE-DELIVERY PUMPS
Title (en)
CONTROL SYSTEM FOR A HYDRAULIC CIRCUIT INCLUDING A PLURALITY OF PARALLEL VARIABLE-DELIVERY PUMPS
Publication
Application
Priority
JP 13661879 A 19791022
Abstract (en)
[origin: EP0027743A1] A hydraulic circuit includes a plurality of parallel variable-delivery pumps (11-14) for supplying pressure fluid to an appliance such as an extrusion press (60). A control system is provided to optimize the operation of the pumps. This system utilizes a sensor which senses the quantity of fluid demanded by the appliance and a controller provides control signals which vary in accordance with the sensor function. These control signals in turn control solenoid valves (41-44) and regulators (31-34) which control the individual pumps in accordance with the demanded fluid.
IPC 1-7
IPC 8 full level
B30B 1/32 (2006.01); B30B 15/20 (2006.01); F04B 49/00 (2006.01); F15B 11/02 (2006.01); F15B 11/04 (2006.01)
CPC (source: EP)
F15B 11/02 (2013.01); F15B 2211/20553 (2013.01); F15B 2211/30505 (2013.01); F15B 2211/30575 (2013.01); F15B 2211/327 (2013.01); F15B 2211/329 (2013.01); F15B 2211/50518 (2013.01); F15B 2211/50536 (2013.01); F15B 2211/5151 (2013.01); F15B 2211/5153 (2013.01); F15B 2211/55 (2013.01); F15B 2211/615 (2013.01); F15B 2211/6336 (2013.01); F15B 2211/6355 (2013.01); F15B 2211/6651 (2013.01); F15B 2211/6653 (2013.01); F15B 2211/7052 (2013.01); F15B 2211/7053 (2013.01); F15B 2211/71 (2013.01); F15B 2211/7107 (2013.01); F15B 2211/7128 (2013.01); F15B 2211/88 (2013.01)
Designated contracting state (EPC)
CH DE GB LI
DOCDB simple family (publication)
EP 0027743 A1 19810429; EP 0027743 B1 19850515; DE 3070650 D1 19850620; JP H0258482 B2 19901207; JP S5659005 A 19810522
DOCDB simple family (application)
EP 80303741 A 19801022; DE 3070650 T 19801022; JP 13661879 A 19791022