EP 2535467 A1 20121219 - Hydraulic pilot control system
Title (en)
Hydraulic pilot control system
Title (de)
Hydraulisches Pilotensteuerungssystem
Title (fr)
Système de contrôle de pilote hydraulique
Publication
Application
Priority
EP 11169795 A 20110614
Abstract (en)
This disclosure is directed towards a hydraulic pilot control system (28,79,82) which provides tactile feedback to a control lever (40) by using a hydraulic signal to provide the feedback. The hydraulic pilot control system (28,79,82) comprises a control lever (40), a hydraulic valve (33), a main hydraulic circuit (44) and a hydraulic feedback circuit. The hydraulic valve (33) is controlled by the control lever (40) and comprises at least on valve actuator responsive to movement of the control lever (40) for controlling pressurised hydraulic fluid in the main hydraulic circuit (44). The hydraulic feedback circuit is configured to provide a feedback signal indicative of a load to which the main hydraulic circuit (44) is subjected. The feedback signal is used to provide tactile feedback to the control lever (40).
IPC 8 full level
E02F 9/20 (2006.01); E02F 9/22 (2006.01); F15B 13/14 (2006.01)
CPC (source: EP)
E02F 9/2004 (2013.01); E02F 9/2232 (2013.01); F15B 13/0422 (2013.01); F15B 13/14 (2013.01); F15B 2211/605 (2013.01); F15B 2211/6355 (2013.01)
Citation (applicant)
US 6508058 B1 20030121 - SEAVERSON LOUIS A [US]
Citation (search report)
- [XY] JP 2005025713 A 20050127 - ISHIKAWA KAZUMI
- [XY] JP H08312605 A 19961126 - SUMITOMO CONSTR MACH
- [XY] JP H03209001 A 19910912 - KOBE STEEL LTD
- [XY] JP H0290403 U 19900718
- [Y] JP 2000220604 A 20000808 - HITACHI CONSTRUCTION MACHINERY
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 11169795 A 20110614