EP 0954703 B1 20020220 - POWER- AND MOMENT-REGULATING SYSTEM FOR A PLURALITY OF HYDRAULIC PUMPS
Title (en)
POWER- AND MOMENT-REGULATING SYSTEM FOR A PLURALITY OF HYDRAULIC PUMPS
Title (de)
LEISTUNGS- BZW. MOMENTENREGELEINRICHTUNG FÜR MEHRERE HYDROPUMPEN
Title (fr)
SYSTEME DE REGULATION DE PUISSANCE ET DE COUPLE POUR PLUSIEURS POMPES HYDRAULIQUES
Publication
Application
Priority
- DE 19645014 A 19961031
- DE 19646687 A 19961112
- EP 9705047 W 19970915
Abstract (en)
[origin: US6324841B1] A power- and moment-regulating system for at least two adjustable hydraulic pumps (10, 11). A hydraulic servo control apparatus (22, 23) continuously adjusts delivery as a function of pressure in a delivery pressure line (16, 17) and pressures in control lines (20, 21). Each servo control apparatus (22, 23) is provided with a moment valve (42, 43) having a valve piston (62) which moves in a valve sleeve (61) forming a valve seat and whose closure force is determined by a measuring spring (46, 47) which is connected to pump actuator (37, 38) and is preloaded depending upon the set delivery rate. The pressure in control line (20, 21) or pressure in control lines of the other hydraulic pump(s) (11, 10) act both on the valve piston (62) and on valve screen (61) of moment valve (42, 43) associated with the given hydraulic pump (10, 11).
IPC 1-7
IPC 8 full level
F04B 49/00 (2006.01); F04B 49/08 (2006.01)
CPC (source: EP US)
F04B 49/002 (2013.01 - EP US); F04B 49/08 (2013.01 - EP US); F04B 2205/061 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
US 6324841 B1 20011204; EP 0954703 A1 19991110; EP 0954703 B1 20020220; JP 2001502771 A 20010227; JP 4082523 B2 20080430; WO 9819069 A1 19980507
DOCDB simple family (application)
US 26925299 A 19990323; EP 9705047 W 19970915; EP 97909271 A 19970915; JP 51995998 A 19970915