Electricity: motive power systems – Motor-reversing – Automatic and/or with time-delay means
Patent
1989-05-01
1990-05-01
Ro, Bentsu
Electricity: motive power systems
Motor-reversing
Automatic and/or with time-delay means
318266, 318275, 318468, 49 25, 49 26, E05F 1514, E05F 1520, G05D 312
Patent
active
049221680
ABSTRACT:
A safety system is disclosed for universal attachment to existing garage door openers. A transmitter of infrared energy transmits a beam laterally of the door opening to detect any obstruction to door closing movement. A safety control circuit is adapted for connection to the main control circuit of the existing garage door opener, the existing push button switch is disconnected from the main control circuit and connected to the new safety control circuit, a flexible cable or cord is connected for actual movement in accordance with movement of the door and is connected to the safety control circuit at a reel on which the cord is wound, and the safety control circuit determines if there is actual door movement and actual door closing movement, as well as being responsive to an obstruction to door closing movement to apply a signal to stop the door and then apply another signal to start the door in its opening movement.
REFERENCES:
patent: 3783556 (1974-01-01), Cook
patent: 3903996 (1975-09-01), Berkovitz et al.
patent: 4029176 (1977-06-01), Mills
patent: 4234833 (1980-11-01), Barrett
patent: 4261440 (1981-04-01), Jacoby
patent: 4263536 (1981-04-01), Lee et al.
patent: 4274226 (1981-06-01), Evans
patent: 4317992 (1982-03-01), Stauffer
patent: 4376971 (1983-03-01), Landgraf et al.
patent: 4452009 (1984-06-01), Baumeler et al.
patent: 4458146 (1984-07-01), Reiner et al.
patent: 4471274 (1984-09-01), Ross et al.
patent: 4533901 (1985-08-01), Lederle
patent: 4561691 (1985-12-01), Kawai et al.
patent: 4563625 (1986-01-01), Kornbrekke et al.
patent: 4621452 (1986-11-01), Deeg
patent: 4625291 (1986-11-01), Hormann
patent: 4694607 (1987-09-01), Ishida et al.
patent: 4701684 (1987-10-01), Seidel et al.
patent: 4706227 (1987-11-01), DuVall et al.
Waggamon Dennis W.
Whitaker Louis G.
Genie Manufacturing, Inc.
Ro Bentsu
LandOfFree
Universal door safety system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Universal door safety system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Universal door safety system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-832380