Actuating drive having a spring return feature

Details Actuating drive having a spring return feature Actuating drive having a spring return feature

1995-08-01

1997-09-02

Marmor, Charles A.

Planetary gear transmission systems or components

Electric or magnetic drive or control

With electric or magnetic controlled brake

475157, 74575, 74577R, F16K 3102

Patent

active

056625421

ABSTRACT:
An actuating drive with a spring return feature for valves in heating, ventilation and air-conditioning systems includes an electric drive (1), a reduction gearing (2) having a return spring tensionable by the actuating movement and serving for the spring return movement, a clutch (3) between the electric drive (1) and the reduction gearing (2) and a brake device (4) actuated during the spring return movement. The brake device (4) takes the form of a centrifugal brake having a fixed brake drum (7) and a rotatably mounted brake shoe carrier (6) on which brake shoes (8) movable radially by centrifugal force are disposed. The brake shoe carrier (6) serves as the clutch member on the gearing side and has a journal (9) having an end pinion (10) engaging in the reduction gearing. The clutch member (5, 11) on the drive side is rotatably mounted on the journal (9) of the brake shoe carrier (6).

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