An electric garage door opener
consists of a power unit and an electric motor, both attach to a
track. A trolley connected to an arm that attaches to the top of
the garage door slides back and forth on the track, thus opening
and closing the garage door.
The trolley is guided along the
track by a chain, belt, or screw that turns when the motor
is operated. A quick-release mechanism is attached to the trolley
to allow the garage door to be disconnected from the opener for
manual operation during a power failure or in case of
emergency.
The
Different Types of Garage Door Openers
Chamberlain PD210D Power Drive 1/2-Horsepower Security-Plus Chain-Drive Garage Door Opener, Black and White
Enjoy reliability and style with the Chamberlain PD210D Power Drive 1/2-Horsepower Chain ...
New starting at $137.00
Chamberlain KLIK1U Clicker Transmitter Universal Garage Door Remote Control
If you need to replace a lost or broken remote control, or just want to complement your ...
Used starting at $22.99
New starting at $22.00
LiftMaster 3800 Residential Jackshaft Garage Door Opener
Wall-mount installation - mounts on the left or right side of door. No rails to hang, it ...
New starting at $299.95
