Movable barrier operator with travel limit adjustment...

Electricity: motive power systems – Automatic and/or with time-delay means – Movement – position – or limit-of-travel

Reexamination Certificate

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C318S467000, C318S468000, C318S445000

Reexamination Certificate

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07436141

ABSTRACT:
A method and a device capable of making fine-tune adjustments in the traveling limits of a movable barrier operator are disclosed. More particularly, an apparatus in accordance with the present invention comprises of a movable barrier operator for controlling a travel limit of a movable barrier comprises of an electrical component sending an input signal to a controller, a controller to derive an output signal from the input signal, and a motor to receive the output signal and modify the travel limit of the movable barrier. More specifically, said method and device can be used to make such fine-tune adjustments to modify an undesirable gap of a movable barrier in its fully closed or fully open positions.

REFERENCES:
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patent: 4684853 (1987-08-01), Coash
patent: 5278480 (1994-01-01), Murray
patent: 5299678 (1994-04-01), Chang et al.
patent: 5869940 (1999-02-01), Parsadyan
patent: 5929580 (1999-07-01), Mullet et al.
patent: 6051947 (2000-04-01), Lhotak et al.
patent: 6078249 (2000-06-01), Slavik et al.
patent: 6326751 (2001-12-01), Mullet et al.
patent: 6414454 (2002-07-01), Lhotak et al.
patent: 6605910 (2003-08-01), Mullet et al.
patent: 7116072 (2006-10-01), Murray et al.

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