A powered barrier operator includes an actuator for moving a movable barrier, such as a garage door, a controller for regulating the operation of the actuator, the controller and actuator being adapted to be energized by a primary power supply. The operator further includes a housing enclosing the actuator and controller, and a secondary power supply assembly, which includes a secondary power supply, such as a rechargeable battery, and a carrier removably attachable to an exterior portion of the housing and adapted to retain the secondary power supply. The controller is operatively connectable to the primary power supply and secondary power supply, and configured to be powered by the secondary power supply when the power from the primary power supply is interrupted and be powered by the primary power supply whether or not the controller is operatively connected to the secondary power supply.

An automatic vehicle door opening and closing system is a system for a vehicle having a controller with at least one button for each door having the system installed, that allows the driver of the vehicle to open or close a preferred door on the vehicle without leaving the driver's seat. A lockout circuit prevents the doors from opening with the automatic function while the vehicle is in motion though the doors may be opened manually if not locked using the vehicle's own door lock system.

A tilt-up door for a building having an opening including a door frame with vertical track members, cam surfaces extending laterally from the vertical tracks at the upper portion of the tracks and a door sized to span the opening. The door can be pivotally coupled with rollers disposed within the vertical tracks and cam followers extending laterally from the upper portion of the door to contact the cam surfaces. When an upwardly directed motive force acts on the door the cam followers come into engagement with the cam surface to lift the door generally vertically and then rotate the door inwardly as the door is raised into an open raised position.

Link for a rigid chain, comprising at least one flange, of rectangular overall shape, with a substantially constant thickness perpendicularly to its main plane. The flange comprises a first part and a second part. Each of the parts comprises a heel designed to bear against a corresponding heel of a similar flange of an adjacent link of the rigid chain, and a base designed to form a bearing about a rotary pin with respect to said adjacent link The heel and the base each extend on either side of the main plane and parallel to said main plane.

A grain bin cover opening system for remotely and safely opening grain bin covers. The grain bin cover opening system generally includes an upper arm adapted to raise or lower a cover, a lower arm connectable to a fixed bracket on the grain bin. The grain bin cover opening system also may include an actuator operably coupled between the upper arm and the lower arm to move the upper arm away from or toward the lower arm, in order to open the cover. The System may also include an inner stiffener coupled to the lower arm, configured to slide into and out of an outer stiffener coupled to the upper arm to maintain a substantially constant angle between the upper arm and the lower arm.

The locking apparatus for sliding door is provided, the locking apparatus comprising a glass safety stopper and a hold-open lock striker sequentially provided in a vehicle body in an opening direction of the sliding door as it moves from a closed position to an open position. The apparatus further includes a roller bracket provided at the sliding door and a locking lever rotatably provided at the roller bracket. The locking lever has a locking protrusion configured to be locked to the glass safety stopper to limit movement of the sliding door in the opening direction and an engagement recess configured to be engaged with the hold-open lock striker to limit movement of the sliding door in the opening direction and a closing direction. A first elastic member is configured to bias the locking lever. The locking apparatus further includes a window glass lever rotatably provided at the roller bracket, connected to a window glass provided at the sliding door via a first cable, and configured to interlock with the locking lever. A second elastic member is configured to bias the glass lever. The locking apparatus further includes a connecting lever rotatably provided at the roller bracket, connected to a handle provided at the sliding door via a second cable, and configured to interlock with the locking lever.

A lever mechanism system includes push arms pivotably coupled to a vent sash and drive arms pivotably coupled to the push arms. The system includes gears coupled to the drive arms and a locking gear slide coupled with a locking mechanism of the sash. The system includes a handle that rotates approximately 180 degrees in a first direction to pivot the gear slide to move the locking mechanism of the sash to an unlocked position and rotates the gears to extend the drive arms and the push arms such that the sash is pushed to an open position. The handle radially rotates approximately 180 degrees in a second direction to rotate the gears to retract the drive arms and the push arms such that the sash is pulled to a closed position and pivots the gear slide to move the locking mechanism of the sash to a locked position.

A lever mechanism system includes push arms pivotably coupled to a vent sash and drive arms pivotably coupled to the push arms. The system includes gears coupled to the drive arms and a locking gear slide coupled with a locking mechanism of the sash. The system includes a handle that rotates approximately 180 degrees in a first direction to pivot the gear slide to move the locking mechanism of the sash to an unlocked position and rotates the gears to extend the drive arms and the push arms such that the sash is pushed to an open position. The handle radially rotates approximately 180 degrees in a second direction to rotate the gears to retract the drive arms and the push arms such that the sash is pulled to a closed position and pivots the gear slide to move the locking mechanism of the sash to a locked position.

A pump handle system includes a pump handle and a main shaft. The pump handle is operable to radially pivot from a starting position in a first pivot direction and back to the starting position in a second pivot direction opposite the first pivot direction. The main shaft is driven by the pump handle to rotate approximately a first half of a predetermined rotational distance in a first rotational direction a first time the pump handle is pivoted out from the starting position in the first pivot direction, and rotate approximately a second half of the predetermined rotational distance in the first rotational direction a first time the pump handle is pivoted back to the starting position in the second pivot direction. The main shaft rotates in a second rotational direction opposite the first rotational direction a second time the pump handle is pivoted in the two-movement push-pull motion.

A platform screen gate system having a tower, a gate secured to the tower. The gate is movable between an open position, to facilitate access to and from the platform, and a closed position, to block access to and from the platform. The system further includes at least one roller secured to the tower and a track secured to the gate. The track is supported by and movable on the least one roller such that the gate cantilevers from the tower and remains above the platform when the gate is moved between the open and closed positions.