EP 0972939 A3 20000823 - Power control for multiple hydropumps
Title (en)
Power control for multiple hydropumps
Title (de)
Leistungsregelvorrichtung für mehrere Hydropumpen
Title (fr)
Dispositif de contrôle de puissance pour plusieurs pompes hydrauliques
Publication
Application
Priority
DE 19831587 A 19980714
Abstract (en)
[origin: EP0972939A2] A control circuit for one or more hydraulic pumps has a hydraulic servo (6) which regulates the setting of the hydraulic pumps in response to the output of the system. A control loop (10,11) parallel to the main output line (3) has variable control valves and a variable flow restriction (12) which dumps fluid back into the sump. With increasing pressure in the control loop the hydraulic response is to increase the pump setting.
IPC 1-7
IPC 8 full level
F04B 49/00 (2006.01); F04B 49/08 (2006.01)
CPC (source: EP)
F04B 49/002 (2013.01); F04B 49/08 (2013.01); F04B 2201/12051 (2013.01); F04B 2205/061 (2013.01); F04B 2205/16 (2013.01); F04B 2205/172 (2013.01)
Citation (search report)
- [A] DE 1188948 B 19650311 - METALLWERK GLOCKERAU G M B H
- [A] US 4668171 A 19870526 - BEUTLER GERHARD [DE], et al
- [A] US 4348159 A 19820907 - ACHESON JOHN L
- [A] US 4478136 A 19841023 - HEISER JOACHIM [DE], et al
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0972939 A2 20000119; EP 0972939 A3 20000823; EP 0972939 B1 20060830; DE 19831587 A1 20000224; DE 19831587 C2 20000615; DE 59913812 D1 20061012
DOCDB simple family (application)
EP 99113343 A 19990709; DE 19831587 A 19980714; DE 59913812 T 19990709