EP 1266164 A1 20021218 - EXTENDED RANGE PROPORTIONAL VALVE
Title (en)
EXTENDED RANGE PROPORTIONAL VALVE
Title (de)
PROPORTIONALVENTIL MIT ERWEITERTEM SCHALTBEREICH
Title (fr)
ROBINET DOSEUR A PLAGE DE REGLAGE ETENDUE
Publication
Application
Priority
- US 0101493 W 20010117
- US 50696700 A 20000218
- US 12067300 P 20000219
Abstract (en)
[origin: WO0161226A1] An extended range proportional valve (10) which can control rates of mass flow over continuous low, intermediate, and high ranges has a pilot member (68) mounted on an armature (84) of a solenoid which can be dithered onto and off of a pilot opening (58) in a main valve member (30) which seals a main valve opening (18) to control mass flow rates over the low range by varying the duty cycle and/or frequency of a pulse width modulated current in the solenoid coil. Intermediate and high flow rates are achieved by dithering the pilot valve member (68) with a duty cycle and/or frequency sufficient to raise the main valve member (30) relatively short and relatively long respective distances from the main valve seat (18).
IPC 1-7
IPC 8 full level
F16K 31/06 (2006.01); F16K 31/40 (2006.01); F16K 31/42 (2006.01); G05D 7/06 (2006.01); G05D 16/20 (2006.01)
CPC (source: EP US)
F16K 31/404 (2013.01 - EP US); G05D 16/2095 (2019.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0161226 A1 20010823; AU 2954801 A 20010827; CN 1188619 C 20050209; CN 1425114 A 20030618; EP 1266164 A1 20021218; EP 1266164 A4 20030507; JP 2003526055 A 20030902
DOCDB simple family (application)
US 0101493 W 20010117; AU 2954801 A 20010117; CN 01808242 A 20010117; EP 01953024 A 20010117; JP 2001560045 A 20010117