A multi-joint link hinge includes a hinge bracket, a plurality of links axially coupled to the hinge bracket, and a door bracket coupled to the plurality of links. The hinge bracket includes a base portion that defines a plurality of screw coupling holes at a vertical surface thereof, a plurality of side portions that extend from the base portion in a horizontal direction and are spaced apart from each other in a vertical direction, and a side surface portion that extends from the base portion in the vertical direction and defines a fixing groove. The plurality of links are coupled between the plurality of side portions along an axis that extends in the vertical direction. The multi-joint link hinge is used for a home appliance including refrigerators.

A hinge for a swing closing element includes a hinge body and a third male or female connection element defining an axis that are coupled to each other to rotate with respect to each other between an open and a closed position. The hinge body includes a curvilinear guide slot defining an angular trajectory that lays on a plane substantially perpendicular to the defined axis. The third male or female connection element is engaged in the curvilinear guide slot so that upon the mutual rotation of the third male or female connection element and of the hinge body, the defined axis translates along the angular trajectory.

A GDO conversion assembly for transitioning between a ceiling mounted and a jackshaft configuration includes a motorhead having a motor output shaft extending from a motorhead casing that includes a mounting interface disposed proximate to the motor output shaft, a track assembly including an input interface shaped to mate with the mounting interface to operably couple the motorhead to a sectional garage door, and a transmission assembly including an input coupler shaped to mate with the mounting interface to operably couple the motorhead to the sectional garage door. The transmission assembly includes an output coupler to operably couple the transmission assembly to a drive tube rotatable to alternately open and close the sectional door. The output coupler includes an output pinion. The input coupler includes an input pinion operably coupled to the output pinion via a flexible coupling member. The transmission assembly includes a transmission housing and a coupling bracket.

Folding door systems, methods and devices includes a first door panel, a second door panel, and an astragal mounted to the first panel. A concealed hinge block is embedded within the astragal and provides a vertically adjustable base for a pin knuckle that couples to a receiver knuckle on the second panel. An integrated shoot bolt actuator system that drives bolts into a header and sill to secure the panels in a closed position operates around the hinge block. A worm gear-based adjuster mechanism within a receiver knuckle enables fine alignment between the two door panels in relation to the hinge knuckle. The system conceals all fasteners and actuator components within the astragal, supporting both inswing and outswing configurations. The modular architecture improves field adjustability, enhances aesthetics, and maintains compatibility with standard door panel constructions while enabling the panels to fold fully open against one another for maximum clear opening.