Abstract: A sliding door for selectively opening and closing an opening is disclosed. The door is comprised of a door panel having a top, a bottom, a leading edge and a trailing edge. The door panel translates laterally relative to the opening between a closed position and an open position. The door has a guide, a guide follower, and a reset member. The guide is mounted to a mounting surface located between the upper and lower extent of the opening, and comprises a first end disposed proximate the opening and a second end opposite the first end. The guide follower is attached to the door panel and disposed in operable engagement with the guide. The reset member is disposed proximate the second end of the guide. The reset member has a surface that is angularly oriented to facilitate operable engagement and alignment of the guide follower with the guide.

Abstract: A door assembly comprising a door body having a bottom edge is disclosed. The door body is selectively movable up and down to open and close an opening. The door assembly further comprises a safety edge attached to the bottom edge of the door body, the safety edge being an extrudate extruded from a deformable material and comprising a first and second chamber formed in integrated cooperative redundancy in the extrudate, wherein the first chamber comprises a first sensor body and the second chamber comprises a second sensor body, each sensor body being responsive to an impact.

Abstract: A door assembly comprising a door body having a bottom edge is disclosed. The door body is selectively movable up and down to open and close an opening. The door assembly further comprises a safety edge attached to the bottom edge of the door body, the safety edge being an extrudate extruded from a deformable material and comprising a first and second chamber formed in integrated cooperative redundancy in the extrudate, wherein the first chamber comprises a first sensor body and the second chamber comprises a second sensor body, each sensor body being responsive to an impact.

Abstract: A rigid-panel overhead door which is selectively moved up and down to open and close an opening and which is guided generally along door guides on opposed vertical sides of the opening is disclosed. The door includes a first chain disposed along one of the door guides and a second chain disposed along an opposed door guide. The door further includes a plurality of panels, each having a first end and a second end, the panels being of sufficient length to extend substantially across the opening but sufficiently limited in length so as to fit between the first and second chains and not extend beyond them. The door further includes a plurality of connectors for joining the first and second chains respectively to the first and second ends of each of the panels.

Abstract: Apparatus for separably connecting a movable barrier to a means for guiding the barrier is disclosed. The connection separates upon a transbarrier impact in excess of a predetermined magnitude. To this end a lateral connecting member (22) extends between the barrier (12) and the guide means (18) and includes opposed first and second ends (22a and 22b). The first end (22a) being attached to the guide 18 and the second end 22b has opposed upper and lower surfaces 46, 48 arcuate portions 46a, 46b, 48a and 48b. A receptacle 24 is attached to the movable barrier 12 and is adapted to receive the second end 22b of the lateral connecting member 22. The receptacle 24 has facing upper and lower inner surfaces 42, 44.

Abstract: An overhead roll door includes a breakaway guide follower having a first part attached to a raising and lowering mechanism and a second part attached to the door. The first part defines a pivotable latch plate having a slot therein, and the second part of the guide follower defines a pin received in the slot. A detent mechanism resists rotation of the latch plate out of a retaining position, in which the first and second retaining elements are held together, to a release position, in which the second retaining element is allowed to move transversely with respect to the first retaining element to allow the door to breakaway in response to an impact.

Abstract: A drive mechanism for an industrial door. A rotatable drive member is operably connected to the door and rotation of the drive member in one direction through operation of a motor will move the door to the closed position while rotation of the member in the opposite direction will move the door to the open position. A clutch mechanism interconnects the motor and the drive member and is movable between an engaged and disengaged position. The clutch mechanism is biased to the engaged position, and by manually pivoting an actuating member that is connected to the clutch mechanism, the clutch mechanism can be moved to the disengaged position, and is retained in the disengaged position until manually released. A switch is operably connected to the motor, and when the actuating member is pivoted to a position to disengage the clutch, the switch will be actuated to shut off power to the motor.

Abstract: A roll-up door for enclosing a doorway in a building. The door comprises a horizontal rotatable drum mounted above the doorway and a flexible door panel is wound on the drum. A pair of first pulleys are secured to opposite ends of the drum and one end of a flat belt is secured to each first pulley, while the opposite end of each belt is dead-ended on a fixed object. A counterbalancing weight is attached to the belt intermediate its ends and exerts a counterbalancing force to wind door panel on the drum. A pair of second pulleys are secured to opposite ends of the drum and located adjacent the first pulleys. One end of a second flat belt is secured to each second pulley, while the opposite end of each second belt is connected to the lower end of the door panel.

Abstract: A vertically stored dockboard. The dockboard includes a frame or supporting structure which is mounted on a loading dock and a rap or deck plate is hinged at its rear edge to the frame and is movable between a generally vertical storage position and a horizontal operating position where the ramp bridges the gap between the loading dock and a truck parked in front of the dock. The ramp is moved upwardly to the vertical storage position by a hydraulic cylinder mechanism and is locked in the storage position by a toggle assembly. As the ramp is moved upwardly to the vertical storage position, the toggle assembly will be automatically moved to an over-center position to lock the ramp in the storage position. The toggle assembly can be released by a manually operated toggle release arm to enable the ramp to fall by gravity to the horizontal storage position.