Abstract: A sliding door includes a frame comprising an elongated header member having a topwall, a backwall, an intermediate wall and a bottom wall. The bottom wall and intermediate wall are engageable with sliding door panel support rollers and the bottom wall and intermediate wall are interconnected by a separate support member to distribute door panel loads between such walls. A movable cover is attached to the header by a hinge part including spaced apart flanges and projections co-operable with projections on the header to support the cover in open and closed positions. The door operator is supported in the header by a single angle-shaped frame member supporting a power supply, a controller and a door operator motor. An adjustable torsion bar assembly supports the door panel against sagging.

Abstract: A motorized universal swing door operator includes a motor driving a gear reduction drive mechanism having an output shaft adapted to be connected to a swing door operating arm. The output shaft supports a sprocket around which is trained a chain having opposite ends connected to a link supported on a shaft which is connected to a return spring. The return spring stores and returns energy regardless of the direction of rotation of the output shaft so as to provide the universal operating capability of the operator.

Abstract: A sliding door includes a frame comprising an elongated header member having a topwall, a backwall, an intermediate wall and a bottom wall. The bottom wall and intermediate wall are engageable with sliding door panel support rollers and the bottom wall and intermediate wall are interconnected by a separate support member to distribute door panel loads between such walls. A movable cover is attached to the header by a hinge part including spaced apart flanges and projections co-operable with projections on the header to support the cover in open and closed positions. The door operator is supported in the header by a single angle-shaped frame member supporting a power supply, a controller and a door operator motor. An adjustable torsion bar assembly supports the door panel against sagging.

Abstract: A motorized universal swing door operator includes a motor driving a gear reduction drive mechanism having an output shaft adapted to be connected to a swing door operating arm. The output shaft supports a sprocket around which is trained a chain having opposite ends connected to a link supported on a shaft which is connected to a return spring. The return spring stores and returns energy regardless of the direction of rotation of the output shaft so as to provide the universal operating capability of the operator.