A bollard that supports a door with a top bearing, middle bearing and bottom bearing with the middle and bottom bearing offset from the bollard.

A bollard that supports a door with a top bearing, middle bearing and bottom bearing with the middle and bottom bearing offset from the bollard.

A door hinge having inner and outer door hinge parts comprising fixing means (hinge plates) for mounting to the door frame and to the door. The outer door hinge part has two bearing portions fixedly connected by the fixing means, and the inner door hinge part has one bearing portion between the two bearing portions of the outer door hinge part. At least one bearing portion has a blind hole with a flat base, and a first cylindrical sliding cup element lies in the blind hole with its end face outer wall superficially on the base of the blind hole. The first sliding cup element has a ball socket-shaped wall containing a metal ball. A second cylindrical sliding cup element lies fully or partly in the blind hole and, on its end face facing the ball, has a concave ball socket-shaped wall lying superficially on the ball surface.

A door hinge having inner and outer door hinge parts comprising fixing means (hinge plates) for mounting to the door frame and to the door. The outer door hinge part has two bearing portions fixedly connected by the fixing means, and the inner door hinge part has one bearing portion between the two bearing portions of the outer door hinge part. At least one bearing portion has a blind hole with a flat base, and a first cylindrical sliding cup element lies in the blind hole with its end face outer wall superficially on the base of the blind hole. The first sliding cup element has a ball socket-shaped wall containing a metal ball. A second cylindrical sliding cup element lies fully or partly in the blind hole and, on its end face facing the ball, has a concave ball socket-shaped wall lying superficially on the ball surface.

A method of forming a corrosion resistant bushing includes bonding a sliding layer to a first surface of a load bearing substrate to form a laminate sheet and cutting a blank from the laminate sheet. The laminate sheet includes an exposed surface corresponding to a second surface of the load bearing substrate. The blank includes cut edges having a load bearing substrate portion. The method further includes forming a semi-finished bushing from the blank.

A method of forming a corrosion resistant bushing includes bonding a sliding layer to a first surface of a load bearing substrate to form a laminate sheet and cutting a blank from the laminate sheet. The laminate sheet includes an exposed surface corresponding to a second surface of the load bearing substrate. The blank includes cut edges having a load bearing substrate portion. The method further includes forming a semi-finished bushing from the blank.

A motorized door hinge system includes a door hinge, a mechanical manipulator assembly, and a plurality of bearings. The motorized door hinge system is useful for mechanically closing and opening a door through a fire detection device being activate or a software application.

A motorized door hinge system includes a door hinge, a mechanical manipulator assembly, and a plurality of bearings. The motorized door hinge system is useful for mechanically closing and opening a door through a fire detection device being activate or a software application.

A multi-joint link hinge includes a hinge bracket, a plurality of side portions, a link module, and a door bracket coupled to the link module. The hinge bracket includes a base portion that defines a plurality of screw coupling holes at a vertical surface of the base portion, and 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. The link module includes a plurality of links that are coupled to the plurality of side portions along an axis that extends in the vertical direction, where the plurality of links is disposed between the plurality of side portions.

A multi-joint link hinge includes a hinge bracket, a plurality of side portions, a link module, and a door bracket coupled to the link module. The hinge bracket includes a base portion that defines a plurality of screw coupling holes at a vertical surface of the base portion, and 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. The link module includes a plurality of links that are coupled to the plurality of side portions along an axis that extends in the vertical direction, where the plurality of links is disposed between the plurality of side portions.