The motorized drive according to the application is particularly suitable for auxiliary or emergency drives and is configured to open or close a wing of a barrier such as a door. The motorized drive includes a motor and a reduction unit through which the motor can open or close the wing, an auxiliary motor including a helical spring which is able to absorb mechanical energy during the opening of the wing and release it during the closing of the same, a reduction unit connecting the auxiliary motor to the wing. A first and a second toothed profile realize a gear with a variable transmission ratio. The first and/or the second toothed profile form at least one toothing having a pitch profile which is substantially non-circular or not formed by a simple arc of a circle or a straight line.

A spring assembly for a handle set assembly includes a housing and a gear rotatably positioned within the housing. The gear has a default position and at least one actuated rotated position. The spring assembly includes at least one rack positioned within the housing. The at least one rack is movable in a rack displacement direction that is normal to the axis of rotation of the gear in response to rotation of the gear between a neutral position and a displaced position. The spring assembly includes a slider positioned at a first end of the at least one rack, the slider being slidable along the rack displacement direction. The spring assembly includes at least one spring captured between the housing and slider. The at least one spring is positioned to apply a spring force to the at least one rack toward the neutral position when the at least one rack is in the displaced position.

A sliding door for a vehicle, which is applicable to a door portion to which a straight rail is difficult to be applied, may include a door rail mounted in a door which is configured to be closed to a vehicle body in a vertical direction of the vehicle; a vehicle body rail mounted in the vehicle body to which the door is configured to be closed in a longitudinal direction of the vehicle; and a moving arm having one end portion which is movably coupled along the door rail in the vertical direction to open or close the door in a transverse direction of the vehicle body during moving, and the other end portion which is movably coupled along the vehicle body rail in a longitudinal direction to allow the door to be slidingly moved in a longitudinal direction of the vehicle body during moving.

An apparatus for a vehicle includes a door rail configured to be installed on a door panel of a door, a vehicle body rail configured to be coupled to a vehicle body so as to be opposite to the door rail, a vehicle body rail slider coupled to one surface of the vehicle body rail so as to be slidable in a front-rear direction along the vehicle body rail, a door rail slider coupled to the door rail so as to be slidable in the front-rear direction along the door rail, a pulley rotatable in conjunction with a movement of the vehicle body rail slider, a speed reducer directly connected to the pulley, and a second arm hingedly coupled to the speed reducer and configured to move the door rail slider.

A door opening assembly is provided for moving a door of a vehicle between an open position and a closed position. The assembly includes a frame member coupled to the vehicle, a link is coupled to the frame member, and a link arm pivotally coupled to the link. A pivot arm is pivotally coupled to the frame member and a pivot bracket is pivotally coupled to the door and the pivot arm. The pivot bracket includes a slot such that a pin on the link arm slides therethrough. The assembly includes a gear rack and a gear operably coupled to the gear rack. The gear is driven by a motor as the door moves between its open and closed positions. The assembly further includes a guide track coupled to the vehicle and a roller rotatably driven along the guide track as the door moves between its open and closed positions.

A guide mechanism for a sliding door includes a rail configured to be mounted on the sliding door, a roller carriage configured to move along the rail, and including a roller bracket and a roller configured to be rotatably mounted on the roller bracket, a hinge arm configured to be pivotally connected to a vehicle body, a first shaft configured to pivotally connect the roller carriage to the hinge arm, and a second shaft configured to pivotally connect the hinge arm to the vehicle body.

Certain embodiments relate to an adjustment indicator mechanism for a door closer including a tubular portion and an adjustment screw mounted to the tubular portion. A housing is configured for mounting to the door closer, and includes a channel and indicia adjacent the channel, each of the indicia corresponding to a respective size of the door closer. An adjustment transmission includes a first component configured for coupling with the adjustment screw. An indicator transmission is engaged with the adjustment transmission and mounted in the housing. An indicator is movably mounted to the housing such that a portion of the indicator is visible via the channel. The indicator is engaged with the indicator transmission such that movement of the indicator transmission causes the indicator to selectively align with the indicia to thereby indicate the current size of the door closer.

System for detecting the movement conditions of the leaf (2) closing a barrier, this leaf being able to occlude a delimited opening or passage and in which the leaf itself is moved by a motor (5) whose rotation shaft (R1) is associated with a motion transmission mechanism to this leaf. On said motor is present a first device for measuring the rotation of said rotation shaft (R1), and at least a second measuring device is associated with at least a second rotation shaft (R2), said second rotation shaft being connected to the first shaft by means of a reduction gear (8), whose reduction ratio is non-integer.

A refrigerator comprising a door rotatable about a hinge shaft. A door opening and closing apparatus comprises a drive motor, a first gear configured to receive power from the drive motor, a second gear, spaced apart from the first gear, configured to transmit a rotational force to the hinge shaft, a clutch gear configured to be rotatable around a rotation axis of the first gear, and configured to transmit power of the first gear to the second gear based on a position of the clutch gear around the rotation axis of the first gear, and a position detection sensor configured to detect the position of the clutch gear so that while the clutch gear is at the position, the clutch gear transmits the power received from the first gear to the second gear which transmits the rotational force to the hinge shaft to open and close the door.

A vehicle door opening and closing apparatus includes a vehicle door, a rail mounted on a vehicle body having a door aperture, a roller unit mounted on the vehicle door and configured to move along the rail and to allow the vehicle door to open and close in a sliding mode and in a swing mode, a sliding guide extending from a rear edge of the door aperture and extending straightly in a longitudinal direction of the vehicle body, a swing guide bent from the sliding guide toward an interior of the vehicle body, a center roller unit mounted on the vehicle door and guided along the sliding guide and the swing guide, and a variable stopper mechanism covering an exterior-side opening of the swing guide in the sliding mode and uncovering the exterior-side opening of the swing guide in the swing mode.