Air control damper assembly

Details Air control damper assembly Air control damper assembly

1987-07-08

1988-02-09

Joyce, Harold

Valves and valve actuation

Rotary valves

Ball valve

49 1, 98 1, 25112911, 251279, E05F 1520

Patent

active

047234814

ABSTRACT:
An air control damper is provided with an actuator coupled to a shaft for operating the blades of the damper. The actuator includes an electric drive motor that turns the shaft by way of a lever that is coupled to the shaft. The lever has a pulley at an outer end and a cable extends from the drive motor around the pulley and back to a fixed point adjacent the motor. When the motor is operated, the cable is wound around the motor drive shaft, pulling the lever towards the motor and turning the shaft. The arrangement provides a mechanical advantage in transmitting the motor output force to the blade actuating shaft.

REFERENCES:
patent: 1052611 (1913-02-01), Moody
patent: 3967779 (1976-07-01), Logsdon
patent: 4301569 (1981-11-01), McCabe
patent: 4581987 (1986-04-01), Ulicny
Nailor-Hart Industries Inc.--Installation Drawing--Std. Control Damper Electric Motor Drive Unit to Jack Shaft--dated Mar. 28, 1984.
Nailor-Hart Industries Inc.--Installation Drawing--Damper Drive Electric Motor Unit to Damper Drive Pin--dated Mar. 26, 1984.
Nailor-Hart Industries Inc.--Installation Drawing--1250 Control Damper Electric Motor Drive Unit to Jack Shaft--dated Mar. 22, 1984.

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