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...

Full description

Saved in:
Bibliographic Details
Main Authors JACOB, STEVEN D, GORSKI, WILLIAM H
Format Patent
LanguageEnglish
French
Published 24.10.1999
Edition6
Subjects
Online AccessGet full text

Cover

Loading…
More Information
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: CA19982256985