Patent ID: 7122987

Claim:
A safety garage door apparatus, comprising: a garage door; two tracks installed on two sides of the garage door, respectively; a controller fixedly installed above the garage door, including a motor, a driving device connected to the motor, and a microprocessor; a linking device including a rail, a rack slidably mounted in the rail, and a linkage with one end connected to one end of the rack and the other end connected to the garage door, the other end of the rack being connected to the driving device; and a detecting device 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, wherein the driving device includes a gear connected to the motor and a chain, a belt or a cable connected between the gear and the other end of the rack.