Abstract:
The automatic door assembly includes a rail, a door carriage movably provided on the rail, a driving unit for moving the door carriage, a rechargeable battery unit for supplying electric power to operate the driving unit and a circuit for electrically connecting the rechargeable battery unit and the driving unit. It also has a charging unit for timely charging of the rechargeable battery unit and a device for stopping the door carriage automatically at the open and closed positions.
Abstract:
A drive mechanism for the leaf or leaves of a sliding door or the like comprises a rotatable shaft and at least one non-rotatable roller head which can be longitudinally displaced along the shaft when the shaft is rotated. The roller head comprises a plurality of rollers which are inclined to and in contact with the shaft. On rotating the shaft the roller head is displaced along the shaft due to the contact of the inclined rollers on the shaft. The lateral movement of the roller head may be transferred to the leaf of a sliding door or the like.
Abstract:
A door operator includes a threadless drive shaft, a carriage mounting skewed rollers engaging the drive shaft to move the carriage along the shaft upon shaft rotation, a drive motor having a shaft coaxial with the threadless shaft and a helical coupling connecting the shafts together. The coupling comprising a plurality of closely spaced helical convolutions with the end of the coupling secured to the motor shaft and the drive shaft, respectively. The coupling includes means for decreasing the shear stresses imposed on the end portions of the convolutions.
Abstract:
Disclosed are a driving roller position adjusting device that is capable of adjusting the extent to which a driving roller, configured to be rotated by a motor, is pushed to a sash in order to obtain frictional force necessary to drive the driving roller when the sash is automatically opened and closed using the driving roller and an automatic sash opening and closing apparatus including the same.
Abstract:
An automated coupling mechanism for sliding doors that are movably mounted upon a storage unit. The coupling mechanism may comprise a rotating mechanism comprising a rotating member, and connecting unit. The storage unit may comprise at least one outer sliding door and at least one inner sliding door comprising an upper track, where the connecting unit connect the rotating mechanism to the outer sliding door. The rotating member and the track may be made from material of substantially high friction coefficient to enable the rotating member to move the inner sliding door along the track when rotated. The connecting unit, which are connect the rotating mechanism to the outer sliding door, may enable the outer sliding door to move in the opposite direction of the inner sliding door, whereby the inner sliding door is moved by the rotating mechanism as a physical counteraction.