Flexible or portable closure – partition – or panel – Roll type – With rotating means
Patent
1997-11-21
2000-07-04
Johnson, Blair M.
Flexible or portable closure, partition, or panel
Roll type
With rotating means
160 8, A47G 502
Patent
active
060824336
ABSTRACT:
A flexible curtain rollup door is driven between open and closed positions by an adjustable frequency AC electric drive motor including a controller which is operable to accelerate and decelerate the motor by supplying AC electrical power at variable frequencies over a predetermined time period and for operating the motor at selected speeds during a continuous run phase of operation. A programmable logic controller (PLC) is operably connected to the controller for the drive motor and is operable to receive signals from upper and lower door position sensors, door bottom edge bar breakout sensors, a door bottom edge bar contact sensor, area sensors on one or both sides of the door for detecting the presence of an object within certain areas adjacent the door opening and manually operable switches to control opening and closing movements of the door. A position sensor is connected to the motor and generates signals correlated with motor and curtain roll drum revolutions to provide backup door position signals. An operating setup procedure includes teaching the PLC signals corresponding to the open and closed positions of the door to provide backup motor shutoff signals in the event that the door position or bottom bar breakout sensors fail to effect shutoff of the drive motor.
REFERENCES:
patent: 4296791 (1981-10-01), Chaumat et al.
patent: 4651940 (1987-03-01), Nakamura
patent: 4665965 (1987-05-01), Pasquier et al.
patent: 5198974 (1993-03-01), Orsat
patent: 5353859 (1994-10-01), Oltahfer et al.
patent: 5601133 (1997-02-01), Krupke et al.
patent: 5758705 (1998-06-01), Wagner et al.
Davis John J.
Smith James A.
Vafaie Foad
Johnson Blair M.
Overhead Door Corporation
LandOfFree
Control system and method for roll-up door does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control system and method for roll-up door, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control system and method for roll-up door will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1477463