Yieldable gearing and safety mechanisms for garage door operators
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 24, 1996
Issued Date -
N/A
app pub date -
Oct 28, 1994
filing date -
Jun 29, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A garage door operator which senses obstructions and takes corrective action before entrapment can occur. Yieldable gears are utilized as a failsafe mechanism such that when the applied torque exceeds certain limit, the gears disengage so that the garage door can be manually moved. The yieldable gears may also be disengaged by remote control or by hand. Solid state circuitry is provided to achieve soft starts and stops of the electric motor. Test circuitry is provided that tests the operational readiness of the electrical components by simulating an abnormal torque condition. During operation of the electric motor, the torque load is electronically calculated and if an abnormal torque load is encountered, the electric motor reverses direction.
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Family
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Cited Art Landscape
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