System and method for automatically requiring secondary...

Details System and method for automatically requiring secondary... System and method for automatically requiring secondary...

2006-10-10

2006-10-10

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Motor-reversing

Automatic and/or with time-delay means

C318S266000, C318S469000, C049S026000

Reexamination Certificate

active

07119509

ABSTRACT:
A force reversal value for an installed barrier is identified. The force reversal value is compared to a predetermined threshold. When the comparing indicates that the force reversal value exceeds the predetermined threshold, the operation of the moveable barrier operator is halted. A secondary safety device can then be installed and, responsive to the installing, the operator can be reenabled.

REFERENCES:
patent: 3789419 (1974-01-01), Shultz
patent: 5191268 (1993-03-01), Duhame
patent: 6002332 (1999-12-01), King
patent: 6075333 (2000-06-01), Huddle
patent: 2004/0183677 (2004-09-01), Fitzgibbon

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