Automatic door being controlled with a servo-controlled safety p

Details Automatic door being controlled with a servo-controlled safety p Automatic door being controlled with a servo-controlled safety p

1986-12-02

1988-04-05

Ro, Bentsu

Electricity: motive power systems

Automatic and/or with time-delay means

Movement, position, or limit-of-travel

318264, 318283, 318286, 318469, H02P 318, H02P 528

Patent

active

047361441

ABSTRACT:
An automatic door, driven with a motor and a speed sensor, is controlled with a servo device. Upon the door being opened or closed and being stopped by an obstacle or being out of order, the motor to drive the door will be stopped; in case of the door being retarded by a wind force or other factors, the driving power of the motor will automatically be adjusted to such an extent that the door can still be closed together so as to fully use the driving power of the motor.

REFERENCES:
patent: 3891907 (1975-06-01), Lenakes et al.
patent: 4006392 (1977-02-01), Catlett et al.
patent: 4563625 (1986-01-01), Kornbrekke et al.
patent: 4614902 (1986-09-01), Jessup

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