Passive garage door operator system

Details Passive garage door operator system Passive garage door operator system

1998-06-17

1999-12-14

Tong, Nina

Communications: electrical

Condition responsive indicating system

Specific condition

340547, 340941, G08B 1308

Patent

active

060023325

ABSTRACT:
A passive remote garage door operator system including a magnetic field sensor which detects a magnet having a flux density and a transmitter that sends a coded security signal to activate a garage door. A controller determines whether the magnet field sensor detects the magnet from a first direction or a second direction and activates the position of the garage door. The magnetic field sensor is preferably affixed to the underside of a vehicle and the magnets are embedded in a driveway leading to the garage. The system thereby automatically opens a garage door based upon the approach of a vehicle and closes automatically based upon the exit of the vehicle without any intervention by the human vehicle operator.

REFERENCES:
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patent: 5282337 (1994-02-01), Duhame et al.
patent: 5369591 (1994-11-01), Broxmeyer
patent: 5381095 (1995-01-01), Andrews
patent: 5402106 (1995-03-01), Dipaolo et al.
patent: 5680134 (1997-10-01), Tsui
patent: 5689236 (1997-11-01), Kister

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