Safety garage door

Details Safety garage door Safety garage door

2006-10-17

2006-10-17

Leykin, Rita (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

Movement, position, or limit-of-travel

C318S480000, C318S256000, C318S257000, C049S026000, C049S028000

Reexamination Certificate

active

07122987

ABSTRACT:
A safety garage door apparatus includes a garage door, two tracks, a controller, a linking device and a detecting device. Two tracks are installed on two sides of the garage door, respectively. The controller includes a motor, a driving device connected to the motor, and a microprocessor. The linking device includes a rail, a rack slidably mounted in the rail, and a linkage with one end connected to the rack and the other end connected to the garage door. The rack is connected with the driving device. The detecting device is mounted in the controller to continually detect a location of the rack so that a moving speed of the rack is determined by the microprocessor to compare with a predetermined rate to determined whether an operation of opening or closing the garage door needs to be stopped or reversed, or a maintenance of the garage door apparatus is needed.

REFERENCES:
patent: 5036899 (1991-08-01), Mullet
patent: 6118243 (2000-09-01), Reed et al.
patent: 2003/0112121 (2003-06-01), Wilson

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