Abstract: A door operator including a drive motor having a motor housing and a drive shaft selectively rotatable via electric power, a drive tube for receiving therein the drive motor, wherein the motor housing is secured to the drive tube to prevent rotation therebetween. The door operator further including a first side plate and second side plate with the drive tube rotatably supported therebetween, at least one drive cog secured to the drive tube, wherein the drive cog is engageable with a door to provide translation of the door. The door operator further including a locking gear secured to the drive shaft, a locking plate slidingly coupled to the first side plate, including a gear engagement portion, and a locking lever secured to the locking plate and operational to selectively disengage the gear engagement portion of the locking plate, allowing the locking gear to be rotatable with the motor housing.

Abstract: A multi-sided bellows cover has panel sections formed of extruded plastic panels that are connected end-to-end by bead-in-slot connections. The panel sections can be made of one or more rigid wall sections that are connected at the fold lines by flexible web sections or by the bead-in-slot connection. The panel sections are integrally molded by extrusion, and many serial wall sections alternating with web sections may be integrally co-extruded with one another.

Abstract: A multi-sided bellows cover has panel sections formed of extruded plastic panels in which rigid wall sections are connected at the fold lines by flexible web sections. The web sections are integrally molded by extrusion with at least one adjacent wall section, and many serial wall sections alternating with web sections may be integrally co-extruded with one another. Intermittently, a bead of one of the flexible web sections of one of the panel sections is captured in a slot of one of the rigid wall sections of another panel section.

Abstract: A multi-sided bellows cover has panel sections formed of extruded plastic panels in which rigid wall sections are connected at the fold lines by flexible web sections. The web sections are integrally molded by extrusion with at least one adjacent wall section, and many serial wall sections alternating with web sections may be integrally co-extruded with one another. Intermittently, a bead of one of the flexible web sections of one of the panel sections is captured in a slot of one of the rigid wall sections of another panel section.