Patent ID: 6273216
Filing Date: 2001-08-14
Classification: B66B

Abstract:
A manually actuable emergency release device for an elevator with a cage which is guided in a shaft and driven by means of movable carrier elements by way of a drive pulley, the drive pulley being driven by a drive with an electric motor having a shaft and a brake, the emergency release device comprising:a manually operable drive element operatively arranged so as to produce a required motor force for an evacuation movement of the elevator;mechanical transmission means for operatively connecting the manually operable drive element to the shaft of the elevator motor, the mechanical transmission means including a device operative to selectively engage and disengage the connection between the manually operable drive element and the shaft;operating elements for remotely engaging and disengaging the operative connection; andoperating means for remotely engaging and disengaging the brake of the elevator motor, the device operative to selectively engage and disengage the connection between the manually operable drive element and the shaft of the elevator motor including a gear wheel transmission having two gear wheels with substantially orthogonally intersecting axes, a first of the gear wheels being mountable on the shaft of the elevator motor and a second of the gear wheels being linked with the manually operable drive element and being engagable and disengagable with the first gear wheel by displacement along the second gear wheel axis the gear wheels having tooth characteristics which allow axial displacement of the second gear wheel along its axis without a change in depth of engagement of the gear wheels.