Fume hood exhaust terminal having an ultrasonic motor drive actuator

A fume hood exhaust terminal for controlling gas flow in an exhaust duct has an electrically powered ultrasonic motor driven actuator for angularly positioning a damper in the terminal. The circuitry of the terminal includes a power failure detection circuit which includes the capability of storing...

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Bibliographic Details
Main Authors JACOB; STEVEN D, GORSKI; WILLIAM H
Format Patent
LanguageEnglish
Published 09.05.2000
Edition7
Subjects
ACTUATING-FLOATS
AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING
BLASTING
COCKS
DEVICES FOR VENTING OR AERATING
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
RANGES
TAPS
THERMAL INSULATION IN GENERAL
VALVES
VENTILATING
WEAPONS
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Summary:A fume hood exhaust terminal for controlling gas flow in an exhaust duct has an electrically powered ultrasonic motor driven actuator for angularly positioning a damper in the terminal. The circuitry of the terminal includes a power failure detection circuit which includes the capability of storing sufficient power to place the damper in a preferred position until power is restored to the exhaust terminal.
Bibliography:Application Number: US19980065921