The disclosure relates to a method at a control device (100) for controlling an overhead door operator system, the overhead door operator system (1) being configured for opening and closing an opening (2), and comprising a door frame (3) comprising a first frame section (4) at a first side (7) of the opening (2) and a second frame section (6) at a second side (5) of the opening (2). The operator system further comprises a door (8) arranged to be moved between an open and closed (C) position, the door (8) being movably connected to the door frame (3) and a drive unit (10) mounted on the door (8), the drive unit (10) comprising at least one motor (11) arranged to move the door (8) from the closed position (C) to the open position (O). An elongated transmission member (19) extends along the first side (7) of the opening (2) and the first frame section (4). The drive unit (10) further comprises a driven transmission member (18) in driving connection with the motor (11). The method comprises the steps of: detecting door movement; determining if detected door movement relates to unexpected door movement; and, if so, taking action so as to prevent more extensive damages. The disclosure further relates to an overhead door operator system for opening and closing an opening.

Disclosed is a hopper car gate assembly including a frame configured for attachment to a hopper car body. The frame defines an opening and includes a beam, wherein the beam has a slot formed therein. A stop plate is removably attached to the beam to selectively obstruct the slot. The assembly has a door supported by the frame. A stop block is attached to the door, wherein the stop block is located on the door such that when the door is inserted into the frame the stop block is aligned with the slot. With the stop plate attached to the beam, the stop block engages with the stop plate to define an open position and prevent further movement of the door in the open direction. With the stop plate detached from the beam, the stop block passes through the slot to allow removal of the door from the frame.

A power latch and presenter assembly for latching and releasing a closure panel and for moving the closure panel from a closed position to a presented position includes a ratchet moveable between a striker capture position and a striker release position. A pawl is configured for movement between a ratchet holding position, whereat the pawl maintains the ratchet in the striker capture position and a ratchet releasing position. A power release actuator is configured to move the pawl from the ratchet holding position to the ratchet releasing position and to move a presenter arm between a non-deployed position, whereat the presenter arm is spaced from the striker, to a deployed position, whereat the presenter arm engages the striker to move the closure panel from the closed position to the presented position. A power presenter actuator is configured to move the presenter arm from the non-deployed position to the deployed position.

A refuse vehicle includes a chassis, a body assembly coupled to the chassis, an electric energy system, and a door system. The body assembly defines a refuse compartment. The body assembly has a cover that at least partially encloses the refuse compartment such that an opening is defined in the body assembly to provide access to the refuse compartment. The door system is coupled to the cover. The door system includes a panel and an electric actuator powered by the electric energy system. The electric actuator is configured to selectively reposition the panel between a first position where the panel extends across the opening and a second position where the panel does not extend across the opening.

An exemplary door closer includes a body, a regulation screw, and an indicator. The body includes a surface and a cavity extending from the surface into the body, and the cavity includes an internal threading. The regulation screw is mounted in the cavity and includes an external threading engaged with the internal threading. The indicator is engaged with the regulation screw and positioned at least partially within the cavity. The indicator is positioned to project beyond the surface when the regulation screw is withdrawn to a reference position relative to the body.

A window lock system includes a sash lock and at least one tilt latch. The sash lock includes a first housing, a lever, a cam, a slide plate, and at least one actuator movable via the lever. The tilt latch includes a second housing configured to be slidably mounted on a window sash and an independent bolt slidingly coupled to the first end of the second housing. A drive bar couples the at least one actuator and the second housing together. The sash lock is movable between at least a locked position, an unlocked position, and a tilt position by rotating the lever. When the sash lock is in the tilt position, the at least one actuator retracts relative to the first housing and via the drive bar retracts the first end of the second housing of the tilt latch relative to a side surface of the window sash.

A gatebox system for delivering fire retardant fluid from a firefighting aircraft. A first and second gate opening are formed through a lower portion of a gatebox. The gates are hingedly connected along edges of the openings. One or two drive shafts in the gatebox are rotatable in gates-closing and gates-opening directions. Crank arms are fixed to the drive shafts and coupled to the gates by connecting links, which define an over-center geometry while the gates are at a closed position, such that weight of the fluid on the first gate induces torque on the drive shaft in the gates-closing direction. Rotation of the drive shafts in the gates-opening direction enables control of the fluid flow from the hopper according to an angular position of the drive shaft.

A hinge apparatus according to various embodiments may include: a bracket including a first coupling part formed in a first direction with respect to a middle of the bracket and a second coupling part formed in a second direction opposite to the first direction with respect to the middle of the bracket, a first body part including a first plate, a first rotation part coupled with the first plate fastened to the first coupling part of the bracket and configured to rotate about the bracket, and a first cam formed in the first rotation part, a second body part including a second plate, a second rotation part coupled with the second plate fastened to the second coupling part of the bracket and configured to rotate about the bracket, and a second cam formed in the second rotation part, and a torque provision unit, including a first follower including a first cam part engaged with the first cam structure and disposed in the bracket, a second follower including a second cam part engaged with the second cam structure and disposed in the bracket, and a pressurizing part disposed in the bracket between the first follower and the second follower and configured to provide an elastic force to the first follower and the second follower in opposite directions.

A door hinge apparatus of a vehicle may include a main bracket provided on one side of a vehicle body corresponding to an end portion of a door of the vehicle and having slide slots formed on upper and lower plates, respectively, a slide hinge bracket engaged to the slide slots to be slidable along the slide slots of the main bracket by a link mechanism, and a door hinge bracket Provided on the end portion of the door and pivotally connected to an external end portion of the slide hinge bracket through a hinge shaft.

A door open and close mechanism for opening and closing a plurality of doors in a machine tool including a cover. The door open and close mechanism includes a linkage mechanism and a slide mechanism. The linkage mechanism is disposed between an operation door and an intermediate door. The linkage mechanism associates the intermediate door with the opening and closing of the operation door. The slide mechanism is disposed between the operation door and the linkage mechanism. The slide mechanism enables the operation door alone to open and close by a predetermined moving distance. When the operation door is operated to open and close within the moving distance, the operation door alone opens and closes by the slide mechanism When the operation door is operated to open and close beyond the moving distance, the intermediate door opens and closes in association through the linkage mechanism.