EP 3943755 A1 20220126 - FLUID PRESSURE CONTROL DEVICE
Title (en)
FLUID PRESSURE CONTROL DEVICE
Title (de)
FLUIDDRUCKSTEUERUNGSVORRICHTUNG
Title (fr)
DISPOSITIF DE COMMANDE DE PRESSION DE FLUIDE
Publication
Application
Priority
- JP 2019055069 A 20190322
- JP 2020008522 W 20200228
Abstract (en)
A fluid pressure control device 100 includes a switch valve 30 configured to control flow of working oil from a first pump 7 to a hydraulic cylinder 1; a flow-combining control valve 60 configured to control flow of working oil supplied from a second pump 8 to the hydraulic cylinder 1; a first connecting passage 14 and a second connecting passage 15 connecting the switch valve 30 and the flow-combining control valve 60. The flow-combining control valve 60 has: a second extending position 60B at which a second bottom side passage 13b is communicated with the second pump passage 11a; and a second contracting position 60C at which a first connecting passage 14 is communicated with the second tank passage 17, and a second rod side passage 12b is shut off from the second tank passage 17.
IPC 8 full level
F15B 11/02 (2006.01)
CPC (source: EP)
E02F 9/2239 (2013.01); E02F 9/2267 (2013.01); E02F 9/2282 (2013.01); E02F 9/2292 (2013.01); F15B 13/0402 (2013.01); F15B 20/005 (2013.01); F15B 2013/0412 (2013.01); F15B 2211/20576 (2013.01); F15B 2211/30565 (2013.01); F15B 2211/3116 (2013.01); F15B 2211/31582 (2013.01); F15B 2211/7053 (2013.01)
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)
EP 3943755 A1 20220126; EP 3943755 A4 20221130; EP 3943755 B1 20240904; CN 113614387 A 20211105; CN 113614387 B 20230725; JP 2020153504 A 20200924; JP 6768106 B2 20201014; WO 2020195555 A1 20201001
DOCDB simple family (application)
EP 20779689 A 20200228; CN 202080022823 A 20200228; JP 2019055069 A 20190322; JP 2020008522 W 20200228