A bidirectional door opening module includes a vehicle body panel located between a first door configured to be rotated to open one end of a vehicle and a second door configured to be rotated to open a remaining end of the vehicle, and a drive unit coupled to the vehicle body panel and configured to apply opening force to the first door and the second door, wherein the drive unit includes a driver configured to apply driving force so as to open the first door or the second door, rail units configured to receive the driving force of the driver and then to apply opening force to the first door or the second door, and hinge units coupled to the rail units and configured to perform rotary opening of the first door or the second door.

A bi-directional door opening structure includes a front door configured to be rotatably opened with respect to a front hinge part positioned in a roof of a vehicle, a rear door configured to be rotatably opened with respect to a rear hinge part positioned in the roof of the vehicle, and a drive unit positioned in the roof at a point where the front door and the rear door are adjacent to each other, and configured to apply an opening force to the front door and the rear door, wherein the drive unit includes a spindle unit configured to open at least one of the front door and the rear door, which has been unlocked by a driving force applied from a driving part, and a differential gear configured to deliver the driving force between the spindle unit and the driving part.

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 covering for an architectural opening has a dual cord operating system. The covering may include a head rail, blind panels depending from the head rail, and an operating system. The operating system may include a housing connected to the head rail, a first drive assembly rotatably mounted within the housing and operable to move the blind panels between an extended configuration and a retracted configuration, and a second drive assembly rotatably mounted within the housing and operable to move the blind panels between a closed configuration and an open configuration.

A covering for an architectural opening has a dual cord operating system. The covering may include a head rail, blind panels depending from the head rail, and an operating system. The operating system may include a housing connected to the head rail, a first drive assembly rotatably mounted within the housing and operable to move the blind panels between an extended configuration and a retracted configuration, and a second drive assembly rotatably mounted within the housing and operable to move the blind panels between a closed configuration and an open configuration.

The present invention relates to a refrigerator that allows a user to easily open a door thereof. A refrigerator, according to one embodiment of the present invention, may comprise: a cabinet having a storage compartment; left and right doors for opening and closing the storage compartment from the left and right; a door opening module provided to open the left and right doors; and having a single motor provided to rotate forward and backward; and a control unit for controlling forward and backward driving of the single motor, wherein the door opening module comprises: left and right racks provided to be moved by driving of the single motor so as to respectively open the left and right doors; a power transmission device for selectively transmitting a driving force of the single motor to the left and 4right racks; and a single switch provided to be turned on/off in conjunction with the power transmission device, and wherein the control unit detects a current position of the left and right racks through the switching-on/off of the single switch, and controls the forward and backward driving and stopping of the single motor.

Electro-mechanical and electronically controlled access devices are described for automatically controlling passage between two areas, and where a plurality of such access control devices may be ganged or clustered to provided additional throughput and directional control, including stacking a plurality of access control devices side by side within a cluster. Each access control device contains multiple rotatable and moveable door panels. The door panels are controlled by various drive mechanisms to enable passage through the device, while ensuring by the use of sensors that door panels avoid touching subjects as they traverse the device. The direction of flow through a device according to these embodiments is electronically controlled and may be changed from time to time. At any instant in time while being traversed, the flow through each device is unidirectional. Multiple devices within a cluster can be directionally controlled according to traffic, demand, time of day, or other factors.

A train door control method and system are provided. The train door control method includes: acquiring a first train identifier and a second train identifier when multiple trains park in a platform at the same time, a door of a first train to which the first train identifier belongs being to be opened at a current time point, and a second train to which the second train identifier belongs being a train arranged behind the first train, which enters the platform and parks in the platform; and controlling the opening and closing of the door of the first train and a door of the second train at different time points respectively according to the first train identifier and the second train identifier.

Methods and apparatus to wirelessly interlock doors are disclosed. A door system includes a user interface to receive interlock configuration data input from a user, the interlock configuration data to define an interlock condition to be satisfied before a first door is to undergo an operation, the interlock condition associated with a current state of a second door. The door system includes a first wireless transceiver to receive a signal from a second wireless transceiver associated with a second door. The method includes a door operation controller to at least one of (1) implement the operation of the first door in response to a request when the current state of the second door satisfies the interlock condition, (2) ignore the request, or (3) not execute the operation of the first door in response to the request when the current state of the second door does not satisfy the interlock condition.

Methods and apparatus to wirelessly interlock doors are disclosed. A door system includes a user interface to receive interlock configuration data input from a user, the interlock configuration data to define an interlock condition to be satisfied before a first door is to undergo an operation, the interlock condition associated with a current state of a second door. The door system includes a first wireless transceiver to receive a signal from a second wireless transceiver associated with a second door. The method includes a door operation controller to at least one of (1) implement the operation of the first door in response to a request when the current state of the second door satisfies the interlock condition, (2) ignore the request, or (3) not execute the operation of the first door in response to the request when the current state of the second door does not satisfy the interlock condition.