STEP MOTOR VALVE ASSEMBLY WITH FAIL-SAFE FEATURE

A step motor valve assembly comprises a housing including a threaded portion, a rotor having rotational axis and a threaded portion in threaded engagement with the threaded portion of the housing such that rotation of the rotor will effect axial movement of the rotor relative to the housing, a valve...

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Bibliographische Detailangaben
Hauptverfasser:	WYCOFF LYMAN W, NIEDERMEYER JOHN F
Format:	Patent
Sprache:	eng
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DEVICES FOR VENTING OR AERATING DYNAMO-ELECTRIC MACHINES ELECTRICITY ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS GENERATION HEATING LIGHTING MECHANICAL ENGINEERING TAPS THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	A step motor valve assembly comprises a housing including a threaded portion, a rotor having rotational axis and a threaded portion in threaded engagement with the threaded portion of the housing such that rotation of the rotor will effect axial movement of the rotor relative to the housing, a valve member carried by the rotor for axial movement toward and away from a valve seat upon rotation of the rotor in respective opposite directions, and a return mechanism for moving the valve member to a fail-safe position upon a loss of power to the step motor valve assembly.