EP 0628731 B1 19980715 - Pilot-actuated servovalve
Title (en)
Pilot-actuated servovalve
Title (de)
Vorgesteuertes Servoventil
Title (fr)
Servo-soupape asservie
Publication
Application
Priority
LU 88277 A 19930527
Abstract (en)
[origin: EP0628731A1] A pilot-actuated servovalve with at least three main flow connections (50, 51, 52, 53) for space-saving installation in a control block is presented. The discharge into the control sleeve (5) for the first main flow connection (50) is formed opposite a piston end face (12) of the main control piston (6). In a pressure-compensation chamber (25), the main control piston (6) forms a pressure-compensation area (13). The pressure-compensation chamber (25) is hydraulically connected to the first main flow connection (50) by a pressure-relief passage (18, 20) in the main control piston (6). A return spring (24) exerts a spring force on the main control piston (6) in the direction of a first axial end stop and thus clearly secures a safety end position. The valve is distinguished by good dynamic behaviour. <IMAGE>
IPC 1-7
IPC 8 full level
F15B 13/043 (2006.01); F15B 13/04 (2006.01); F15B 20/00 (2006.01); F16K 11/07 (2006.01); F16K 31/12 (2006.01)
CPC (source: EP US)
F15B 13/0402 (2013.01 - EP US); F15B 13/0433 (2013.01 - EP US); F15B 13/0435 (2013.01 - EP US); F15B 20/002 (2013.01 - EP US); H01F 2007/1684 (2013.01 - EP US); Y10T 137/86606 (2015.04 - EP US); Y10T 137/86614 (2015.04 - EP US); Y10T 137/86702 (2015.04 - EP US)
Designated contracting state (EPC)
AT DE FR GB IT NL
DOCDB simple family (publication)
EP 0628731 A1 19941214; EP 0628731 B1 19980715; AT E168450 T1 19980815; CA 2124429 A1 19941128; CA 2124429 C 20040127; CN 1041344 C 19981223; CN 1098484 A 19950208; DE 59406438 D1 19980820; JP 3519122 B2 20040412; JP H06341409 A 19941213; LU 88277 A1 19941201; RU 2124666 C1 19990110; US 5445188 A 19950829
DOCDB simple family (application)
EP 94107440 A 19940513; AT 94107440 T 19940513; CA 2124429 A 19940526; CN 94106150 A 19940526; DE 59406438 T 19940513; JP 11505194 A 19940527; LU 88277 A 19930527; RU 94017853 A 19940525; US 24814694 A 19940524