EP 1781953 A1 20070509 - PILOT VALVE, ESPECIALLY FOR SERVO VALVES
Title (en)
PILOT VALVE, ESPECIALLY FOR SERVO VALVES
Title (de)
PILOTVENTIL, INSBESONDERE FÜR SERVOVENTILE
Title (fr)
SOUPAPE PILOTE, NOTAMMENT POUR DES SERVO-SOUPAPES
Publication
Application
Priority
- EP 2005008368 W 20050802
- DE 102004038380 A 20040806
Abstract (en)
[origin: WO2006015771A1] Disclosed is a pilot valve, especially for a servo valve, comprising an actuating motor (6) and a hydraulic preamplifier via which a control pressure difference can be created that acts upon a main slider (32) of a main stage (4). According to the invention, a blocking mechanism (26) is embodied in the flow path of the control oil. A control duct (14, 16) that is connected, either directly or via a branch, to a control chamber of the main stage can be blocked by manually actuating said blocking mechanism (26) while the other control duct remains open. The other control duct can be blocked by actuating the blocking mechanism in the opposite direction while the first control duct remains open. A control pressure difference by means of which the main slider can be displaced into a predetermined position can be created manually by actuating said blocking mechanism.
IPC 8 full level
F15B 13/043 (2006.01)
CPC (source: EP US)
F15B 13/0438 (2013.01 - EP US); Y10T 137/86598 (2015.04 - EP US)
Citation (search report)
See references of WO 2006015771A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2006015771 A1 20060216; CN 101010519 A 20070801; CN 101010519 B 20100721; DE 102004038380 A1 20060316; DE 102004038380 B4 20130404; EP 1781953 A1 20070509; EP 1781953 B1 20120704; US 2007215222 A1 20070920; US 7631663 B2 20091215
DOCDB simple family (application)
EP 2005008368 W 20050802; CN 200580026723 A 20050802; DE 102004038380 A 20040806; EP 05781992 A 20050802; US 57333105 A 20050802