EP 0188461 A4 19870706 - LIQUID FLOW CONTROLLER HAVING PRESSURE BALANCED PISTON FOR DELIVERING CONSTANT FLOW.
Title (en)
LIQUID FLOW CONTROLLER HAVING PRESSURE BALANCED PISTON FOR DELIVERING CONSTANT FLOW.
Title (de)
REGLER DES FLÜSSIGKEITSDEBITS MIT DRUCKAUSGLEICHKOLBEN ZUR VERABREICHUNG KONSTANTEN DEBITS.
Title (fr)
REGULATEUR DE DEBIT A PISTON EQUILIBRE PAR LA PRESSION POUR FOURNIR UN DEBIT CONSTANT.
Publication
Application
Priority
US 62833384 A 19840706
Abstract (en)
[origin: WO8600731A1] A small, lightweight, simple, and highly reliable flow controller (2) utilizing two moving parts (6, 48), for apportioning inlet fluid flow between an orifice outlet (26, 16) and inlet. Constant outlet flow over a substantial inlet flow and pressure range is achieved through the use of a flow balanced flow control piston (6) reciprocating internally of a housing (4). The balanced piston is biased to a predetermined proportioning range through an internal spring (48). The unit is normally operated with inlet port and outlet pressure sensing port in fluid communication with an external orifice (24). A bypass port (14) communicating with the controller inlet adjacent the control piston returns excess fluid to the reservoir (22) of a pumped fluid system. Increases in inlet flow to the regulator/orifice combination act to adjust the balanced piston position and initiate or increase flow across an integral piston/seat control orifice. The downstream or outlet pressure of the external orifice is sensed by an equal piston area distal the cylinder seat and/or inlet side of the piston. A damping piston (50) abuts said inlet pressure sensing portion of the piston in order to minimize transient piston motion or chatter.
IPC 1-7
IPC 8 full level
CPC (source: EP)
Citation (search report)
- No relevant documents have been disclosed.
- See references of WO 8600731A1
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
WO 8600731 A1 19860130; BR 8506815 A 19861125; CA 1243251 A 19881018; EP 0188461 A1 19860730; EP 0188461 A4 19870706; IL 75557 A0 19851031; JP S61502988 A 19861218
DOCDB simple family (application)
US 8501070 W 19850610; BR 8506815 A 19850610; CA 483689 A 19850611; EP 85903131 A 19850610; IL 7555785 A 19850619; JP 50262885 A 19850610