Damper control mechanism

Details Damper control mechanism Damper control mechanism

1990-12-24

1992-12-08

Walton, George L.

Valves and valve actuation

Electrically actuated valve

Rotary electric actuator

251305, 200 47, 200 6139, 200574, 310 68B, 310 83, F16K 3166, F16K 3104

Patent

active

051691213

ABSTRACT:
An air control damper assembly for mounting in an air duct comprising a damper blade pivotally mounted within the air duct and means for rotating the damper blade from an open position to a close position. A drive system rotates the damper blade such that the system exerts a high torque and low speed at the beginning and end of the rotation of the blade from one position to the other and a low torque and high speed in the middle of the rotation of the blade between positions. The damper blade is locked in the open and close positions by means of a motor and gear unit. Electrical switches interfacing with a drive disk in the drive system partially controls the energization of the motor.

REFERENCES:
patent: 2868911 (1959-01-01), Wilhelmson
patent: 2871327 (1959-01-01), Jones
patent: 2977437 (1961-03-01), Doane
patent: 3165291 (1965-01-01), Osen
patent: 3282557 (1966-11-01), Capps
patent: 3430916 (1969-03-01), Raymond, Jr.
patent: 3825182 (1974-07-01), Bauchmann
patent: 3870274 (1975-03-01), Broe
patent: 3930133 (1975-12-01), Sulzer
patent: 4050000 (1977-09-01), Sutter
patent: 4193541 (1980-03-01), Scheidweiler
patent: 4533800 (1985-08-01), Parsons

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