EP 0150308 A3 19861001 - APPARATUS FOR CONTROLLING FLUID FLOW
Title (en)
APPARATUS FOR CONTROLLING FLUID FLOW
Publication
Application
Priority
US 57499184 A 19840130
Abstract (en)
[origin: EP0150308A2] A hydraulic fluid system comprising a fluid source, a plurality of hydraulic motors, and a plurality of control valves communicating with said source. Each valve has a neutral position and is selectively movable from its neutral position for controlling flow to a respective hydraulic motor. Means for moving a valve from its neutral position comprise means for communicating a pilot fluid flow from the source to one side of the valve to establish a predetermined differential pressure force on the valve. A fluid logic circuit provides a load sense pressure signal proportional to the highest load on a motor in the system, and the load sense pressure signal is continuously applied to both sides of each of the control valves so that the predetermined differential pressure applied to a valve is essentially unaffected by changes in the load sense pressure signal.
IPC 1-7
IPC 8 full level
F15B 11/05 (2006.01); F15B 11/16 (2006.01); F15B 13/04 (2006.01); F15B 13/042 (2006.01)
CPC (source: EP)
F15B 11/165 (2013.01); F15B 13/0416 (2013.01); F15B 13/042 (2013.01); F15B 2211/20538 (2013.01); F15B 2211/30525 (2013.01); F15B 2211/329 (2013.01); F15B 2211/50536 (2013.01); F15B 2211/57 (2013.01); F15B 2211/6052 (2013.01); F15B 2211/6355 (2013.01); F15B 2211/7054 (2013.01); F15B 2211/7058 (2013.01); F15B 2211/71 (2013.01)
Citation (search report)
- [A] GB 2044961 A 19801022 - DOWTY HYDRAULICS UNITS LTD
- [A] CH 636931 A5 19830630 - AROFLEX AG [CH]
- [A] US 3742980 A 19730703 - BYERS J
- [A] EP 0041247 A2 19811209 - BACKE WOLFGANG [DE]
- [A] US 3780623 A 19731225 - HOHLEIN H
- [AD] US 4126293 A 19781121 - ZEUNER KENNETH W, et al
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0150308 A2 19850807; EP 0150308 A3 19861001; JP S60159404 A 19850820
DOCDB simple family (application)
EP 84114156 A 19841123; JP 260885 A 19850110