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US 9,022,346 B2Granted
Direct acting solenoid actuator
AssigneeFlextronics AP, LLC
InventorsHamid Najmolhoda, Matthew S. Peterson
Life of this patent
Estimating the term…
Abstract
A solenoid actuator comprising an armature member that engages a spool including a spool cap on an end of the spool that is axially movable relative to the spool. A bore in the spool allows fluid to flow from a control port to the spool cap, such that pressure is established in the spool cap. The pressure established in the spool cap acts on the spool with a force directly proportional to the control pressure and the fluid-contacting area inside the spool cap.
Claims19
A solenoid actuator fluid control valve comprising:
- a solenoid actuator component having:
- a fixed solenoid component;
- and
- a movable armature component;
- and
- a fluid control valve component having:
- a fixed nozzle body;
- a movable spool within the fixed nozzle body;
- and
- a spool end cap disposed over a first end of the moveable spool and between the first end of the moveable spool and the fixed nozzle body to provide a feedback pressure;
- wherein the spool end cap is axially movable relative to the movable spool;
- and
- wherein an exterior of the spool cap is exposed to exhaust or zero pressure and an interior of the spool cap is exposed to control pressure.
10 more elements
A method of operation of a fluid control valve comprising:
- in a fluid control valve component having:
- a fixed nozzle body;
- a movable spool within the fixed nozzle body;
- and
- a spool end cap within the fixed nozzle body disposed over a first end of the moveable spool and axially movable relative to the movable spool;
- wherein an exterior of the spool cap is exposed to exhaust or zero pressure and an interior of the spool cap is exposed to control pressure;
- adjusting a diameter of the spool end cap to selectively adjust a feedback pressure on the movable spool.
4 more elements
Dependencies are inferred from the claim text.