Door actuating system

Details Door actuating system Door actuating system

1987-10-30

1989-07-11

Ro, Bentsu

Electricity: motive power systems

Automatic and/or with time-delay means

Movement, position, or limit-of-travel

318 9, 318 10, G05D 310

Patent

active

048475416

ABSTRACT:
A door actuating system has an electric drive motor and a chain drive connected to the door. An electromagnetic clutch connects the motor drive to the chain drive when the clutch is activated. The system includes a controller for controlling the magnitude of the voltage applied to the clutch to allow the movement of the door to build up over a finite time to a steady-state speed.

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patent: 4698622 (1987-10-01), Goto et al.
patent: 4736144 (1988-04-01), Chun-pu

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