发明名称 |
Extended range proportional valve |
摘要 |
An extended range proportional valve which can control rates of mass flow over continuous low, intermediate and high ranges has a pilot member mounted on an armature of a solenoid which can be dithered onto and off of a pilot opening in a main valve member which seals a main valve opening 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 with a duty cycle and/or frequency sufficient to raise the main valve member relatively short and relatively long respective distances from the main valve seat.
|
申请公布号 |
US2001032947(A1) |
申请公布日期 |
2001.10.25 |
申请号 |
US20010858831 |
申请日期 |
2001.05.17 |
申请人 |
FREISINGER PAUL W.;HALLER JOHN J.;HOLBOROW PETER A. |
发明人 |
FREISINGER PAUL W.;HALLER JOHN J.;HOLBOROW PETER A. |
分类号 |
F16K31/40;G05D16/20;(IPC1-7):F16K31/06;F16K31/34 |
主分类号 |
F16K31/40 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|