E - Fixed Constructions – 05 – F
Patent
E - Fixed Constructions
05
F
268/28
E05F 15/16 (2006.01) H02K 5/136 (2006.01)
Patent
CA 1165785
ABSTRACT OF THE DISCLOSURE An industrial door operator for activation of upward acting or horizontally sliding doors or gates is disclosed, The door operator is made with a single waterproof or explosion proof control box thus allowing standard limit switches, contactors etc. to be employed. The door operator has an electric motor mounted on a frame, the motor driving a sprocket connected to an output shaft for operating the door, the improvement comprising a single weatherproof or explosion proof control box containing motor control contactors, limit switch, and a safety interlock switch adapted to disconnect power to the electric motor and allow manual operation of the door.
379030
Fetherstonhaugh & Co.
Stefanatos Peter G.
LandOfFree
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