Door operation control apparatus

Electricity: motive power systems – Automatic and/or with time-delay means

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

364513, 364107, 318466, 49 28, G05D 308

Patent

active

043832067

ABSTRACT:
A motor for operating the door is controlled for forward and reverse rotations and stoppage by a control circuit responsive to an operation command signal, an upper-lower limit signal, an obstruction detection signal and a maximum drive time over signal, thus controlling the door stepwise for opening, stoppage, closing, stoppage and opening in that order. Upon generation of an obstruction detection signal or a maximum drive time over signal during the closing operation, the control circuit controls the motor in a manner to open the door for a certain period of time, and subsequently upon application of an operation command signal, the control circuit is set in a manner to open the door again.

REFERENCES:
patent: 4263536 (1981-04-01), Lee et al.
patent: 4300660 (1981-11-01), Schoenmann et al.
patent: 4328540 (1982-04-01), Matsuoka et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Door operation control apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Door operation control apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Door operation control apparatus will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-527699

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.