Jack shaft garage door operator

Details Jack shaft garage door operator Jack shaft garage door operator

2008-01-15

2008-01-15

Redman, Jerry (Department: 3634)

Movable or removable closures

Up-and-over type; e.g., moves from vertical to withdrawn...

With operator

C049S322000

Reissue Patent

active

09547563

ABSTRACT:
A jack shaft garage door operator for opening and closing a movable garage door has a drive containing an electric motor. A rotatable jack shaft is connected to the drive unit to be driven thereby. A pull-up cable drum is connected to and driven by the jack shaft. A pull-up cable extends from the drum about which it is wound and connects to a bottom part of the garage door to raise the door. A pivoting arm is mounted near the jack shaft and provides tension to the cable. A shaft lock hub mounted on the jack shaft is engaged and locked by the arm if the tension in the cable drops. A stop is mounted on the garage door for engagement by the movable arm in the event that the door is opened without the cable being drawn in the cable drum.

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