Apparatus and method for automatic garage door operation

Details Apparatus and method for automatic garage door operation Apparatus and method for automatic garage door operation

1989-05-30

1990-07-03

Ro, Bentsu

Electricity: motive power systems

Motor-reversing

Automatic and/or with time-delay means

318266, 318286, H02P 122

Patent

active

049394347

ABSTRACT:
Garage door controllers are improved by means to automatically close the doors after a preselected delay time, once they have been opened.

REFERENCES:
patent: 3617835 (1971-11-01), Dreher
patent: 4035702 (1977-07-01), Pettersen et al.
patent: 4119896 (1978-10-01), Estes, III et al.
patent: 4364003 (1982-12-01), Phipps
patent: 4404558 (1983-09-01), Yen
patent: 4429264 (1984-01-01), Richmond
patent: 4463292 (1984-07-01), Engelmann

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