Valves and valve actuation – Electrically actuated valve – Solenoid having plural coils
Patent
1993-09-01
1994-07-12
Nilson, Robert G.
Valves and valve actuation
Electrically actuated valve
Solenoid having plural coils
2511922, 335256, F16K 3102
Patent
active
053281500
ABSTRACT:
The present invention digital damper actuator utilizes a sectioned coil m up of a number of independently energizable coils connected together. To energize/de-energize each of the sectioned coils, a digital signal, in the form of 1 or 0, is provided by a controller microprocessor to a corresponding relay. Thus, for example, if a 1 is provided to the relay, its corresponding sectioned coils is energized. And if a 0 signal is provided to the relay, the sectioned coils is de-energized. A portion of the shaft which acts as a plunger connected to a damper pivotally fitted within a air duct is slidably fitted within the sectioned coil. Thus, as each of the sectioned coils is energized/de-energize, the shaft is moved correspondingly to thereby incrementally open/close the damper to allow an increasing/decreasing amount of air to pass through the air duct. As the number of sections which make up the sectioned coils is increased, the resolution of the incremental opening/closing of the damper is increased.
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Nilson Robert G.
The United States of America as represented by the Secretary of
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