A driving device for a door opener includes a motor driving a first transmission member to rotate. Rotation of the first transmission member causes lateral displacement of a sliding member which moves jointly with a connecting rod. A return spring is mounted around the connecting rod. An adjusting ring is in threading connection with the connecting rod and abuts against the return spring. When the first transmission member does not rotate, rotation of the adjusting ring causes displacement of the adjusting ring in the lateral direction to change an extent of pre-compression of the return spring. When the first transmission member rotates in a direction, the connecting rod and the adjusting ring together move in the lateral direction towards the first transmission member, and the return spring is compressed. When the first transmission member rotates in a reverse direction, and the return spring restores its length.

An exemplary method involves operating a door operator coupled to a door. The door operator includes a motor operable to move the door in at least one direction and a controller operable to control the motor. The method generally involves a calibration procedure including: with the door at a first position and the door having an initial speed, initiating, by the controller, measurement of a time duration; in response to the door reaching a target speed different from the initial speed, ceasing, by the controller, measurement of the time duration; and determining, by the controller, a maximum speed based on the time duration. The method further includes performing at least one operation based upon the maximum speed.

A fluid-driven hatch for a bulk material container includes a cover is opened by a fluid-driven cover actuator and secured by a fluid-driven lock actuator. A fluid conduit connects both the fluid-driven cover actuator and the fluid-driven lock actuator to a pressurized fluid source. Pressurized fluid is selectively supplied to the fluid conduit such that the fluid-driven lock actuator is actuated at a first pressure to unlock the cover, and the fluid-driven cover actuator is actuated moments later at a second, higher pressure to open the cover.

An adjustable door hinge having asymmetric leaves, one leaf on the door plane and a gap between leaf knuckles for vertical adjusting crescent disc shims and a leaf having a slot for positioning a fastener along the slot for lateral adjustments.

An automated window mechanism is described that includes a motor attached to a sliding window and a rack on a window frame. The window frame supports the sliding window and provides a path for sliding movement of the sliding window relative to the window frame. A transmission couples the motor to the rack such that rotation of the motor causes the transmission to move the sliding window relative to the rack. The mechanism also includes a clutch switch assembly, that includes a switch and a clutch actuator responsive to the switch and being configured to engage and disengage the transmission. When the transmission is disengaged, the motor cannot move the window. The mechanism also includes a position sensor, such as an encoder, coupled to the transmission and configured to monitor a position of the window relative to the frame using the transmission. Engagement or disengagement of the transmission allows the window to be moved manually within the frame. The position sensor continues to monitor the rotational position of the transmission when the transmission is engaged and when the transmission is disengaged.

An automated window mechanism includes a main body attached to a sliding window, a first telescoping arm extending from the main body in a first direction and a second telescoping arm extending from the main body in a second direction opposite the first direction. A first actuator is located at an end of the first telescoping arm. A first gear is coupled to the first actuator, the first gear being configured to interface with a first rack secured to a first side of a window frame. A second actuator is located at an end of the second telescoping arm. A second gear coupled to the second actuator, the second gear being configured to interface with a second rack secured to a second side of the window frame. The operation of the first and second actuators in concert causes the first and second gears to rotate relative to the first and second racks and move the sliding window within the window frame.

A door opener includes a first side cover fixed to a mounting seat. A mode switching device is disposed on the first side cover and includes an anti-theft control module. A driving device is operatively connected to a door for moving the door. A control device is electrically connected to the mode switching device and the driving device. The control device includes a control panel for operating the driving device. The mode switching device is switchable to a wake-up mode only when the anti-theft control module is unlocked. The driving device is operable by the control panel only when the mode switching device is in the wake-up mode. An outer cover is coupled to the first side cover and covers an outer side of the driving device and an outer side of the control device. The control panel is exposed via a window of the outer cover to permit operation.

A retrofit module configured for use with a door closer having a pinion. The retrofit module generally includes a case, an output shaft, a motor, and a control assembly. The output shaft is rotatably mounted in the case, and is configured for rotational coupling with the pinion. The motor is mounted to the case, and is operable to rotate the output shaft in a door-opening direction. The control assembly is mounted to the case, and is configured to operate the motor to drive the output shaft in the door-opening direction in response to an actuating signal.

An example door closer includes a casing and a pinion rotatably mounted to the casing. The pinion is operable to rotate through a plurality of movement zones, and the door closer is configured to exert forces on the pinion as the pinion moves through the plurality of movement zones. The door closer further includes a plurality of adjustment mechanisms, each operable to adjust the force exerted on the pinion as the pinion travels through a corresponding movement zone. The casing is provided with indicia that correlate each of the adjustment mechanisms to the corresponding movement zone.

An embodiment vehicle hinge driving apparatus includes an actuator, a housing connected to the actuator, an output shaft rotatably mounted in the housing, and a transmission mechanism including a plurality of gear sets configured to transmit a torque from the actuator to the output shaft, wherein the plurality of gear sets includes a proximal gear set close to the actuator, a first distal gear set operatively connected to the proximal gear set, and a second distal gear set operatively connected to the first distal gear set, wherein the second distal gear set is detachably mounted and configured to respond to a required output torque, and wherein the output shaft is connected to the first distal gear set or the second distal gear set.