A garage door assembly that includes a torsion spring counterbalance apparatus mounted on a header wall above a garage door, the apparatus including at least one spring wound on a shaft, also includes a safety device. The safety device includes a capture device mounted on the header wall above the garage door, and a catch device attached to the shaft at a location proximate to the capture device on the header wall. The catch device rotates with the torsion spring counterbalance shaft, and the catch device is capable of extending away from the shaft under centrifugal force to engage the capture device and thereby stop the garage door from further free-falling.

A lift gate system includes a gate, a first pole, a second pole, a header and an internal operator. The first pole is configured to attach to the ground on one side of the gate and includes a first track attached approximate to a first top. The second pole is configured to attach to the ground on the opposite side of the gate from the first pole and includes a second track attached approximate to a second top. The header interconnects the first top with the second top. The internal operator is configured for lifting the gate, where the internal operator is inside the first pole, the second pole, and/or the header.

A convenient cover opening and closing method, system, and apparatus are described. A cover grasper, adjustable tension, an anchor, and a stabilizer provide the necessary torques so that a cover opens and closes in a controlled smooth manner. Moreover, the apparatus and system may be conveniently removed from and secured to the cover's container, may be secured in a more permanent fashion to the container, or components of it may be secured on the container while others are not.

Embodiments of the invention provide a opening and closing assembly for a rigid door panel that is rotatably attached to a roller received within a track on a door frame member. A support member can be rotatably attached to the door panel. A first pivot arm can extend inboard from the support member to pivotally attach to an inboard frame member. Upon application of an upward force to the door panel, the first pivot arm can pivot with respect to the first inner frame member to move the support member in an arcuate path. The support member can thereby move the door panel upward and inboard along a door path at least partly defined by the track, with a lower end of the door panel not extending substantially outboard of the door frame member as the door panel moves along the door path.

In example implementations, an adjustable speed operator governor release for a rolling fire shutter is provided. The adjustable speed operator governor release includes a shaft coupled to the rolling fire shutter, a gear on a first end of the shaft to engage a spring-loaded clutch during a fire, wherein the spring-loaded clutch is moved to disengage from a drive assembly and to engage the gear of the adjustable speed governor to operate the rolling fire shutter, and a linear speed adjusting mechanism coupled to the shaft and the gear to control a speed of free fall of the rolling fire shutter during the fire.

The present invention relates generally to a new and improved overhead door safety support and/or kit for overhead garage doors. More specifically, the invention relates to an overhead door safety support that is comprised of a metal frame arm, a level arm switch, a mounting assembly, a junction box, a spring-loaded garage door receiving piece, a plurality of hinges, a hand lock, and a stabilizing foot. The overhead door safety support and/or kit for overhead garage doors of the present invention improves safety and is relatively easy to install and use.

The present invention relates to a door operator device and sectional overhead door system with anti-pressure and anti-theft functions, principally having a small-tooth-difference reduction gear and a ratchet-locking device. An input end of the small-tooth-difference reduction gear is kinematically connected to an input shaft; an output end of the small-tooth-difference reduction gear is kinematically connected to a shaft; the small-tooth-difference reduction gear includes a ratchet on its outer circumference; the ratchet-locking device is controlled to selectively lock or unlock the ratchet. When the ratchet-locking device locks the ratchet, it can realize the anti-theft function; when the ratchet-locking device unlocks the ratchet, and the shaft is driven by the input shaft through the small-tooth-difference reduction gear, but the shaft decelerates, stops, or even reverses due to an obstacle encountered or other factors, the input shaft and the small-tooth-difference reduction gear will idle automatically.

The present invention relates to a door descent preventing apparatus, and more particularly a door descent preventing apparatus mounted to a shaft installed at an inlet or an outlet of a chamber in a vertical direction in order to prevent descent of a door configured to be moved upwards and downwards along the shaft, the door descent preventing apparatus including a plurality of support bars, an upper fixing unit configured to connect upper ends of the support bars to each other, the upper fixing unit including a first upper fixing piece having a semicircular arc shape and a second upper fixing piece having a semicircular arc shape, and a lower fixing unit configured to connect lower ends of the support bars to each other, the lower fixing unit including a first lower fixing piece having a semicircular arc shape and a second lower fixing piece having a semicircular arc shape.