Patent ID: 8182381
Filing Date: 2012-05-22
Classification: E06B

Abstract:
1. A drive arrangement for an aperture closure arrangement having a support member which is non-rotating, in use, and a rotatable member supported for rotation relative to the support member to pay out or reel in an aperture closure member, the drive arrangement having: a base part and securing means for securing the base part to the support member to prevent rotation relative to the support member; a drive mounted on the base part to provide drive for turning the rotatable member; and a disengageable clutch arrangement through which drive for driving the rotatable member is transmitted, in use, from the drive arrangement, when the clutch arrangement is engaged; and wherein the drive arrangement includes an intermediate rotatable member driven through the clutch arrangement and having coupling means for coupling to drive the rotatable member of the aperture closure arrangement, and wherein drive is transmitted from the clutch arrangement by an endless loop member driven by a drive wheel, and the clutch arrangement is operable to move the drive wheel to engage and disengage the endless loop member; and wherein the drive wheel is rotatably mounted on a slide plate supported by the base part and slidable up and down relative thereto; and wherein the drive is secured to the slide plate to be slidable up and down, with the drive wheel, relative to the base part; and wherein the clutch arrangement includes an arrangement for controlling the position of the slide plate relative to the base part; and further including a second slider member movable up and down relative to the base part, into and out of driving engagement with the intermediate rotatable member; and wherein the second slider member and the intermediate rotatable member carry respective teeth which mesh when in driving engagement; and wherein the second slider member includes manually operable drive means for manually driving the intermediate rotatable member when the second slider member is in driving engagement with the intermediate rotatable member; and wherein the manually operable drive means comprises a wheel operable to turn by means of an elongate closed loop member; and wherein the arrangement is controllable by a Bowden cable having an inner cable and sheath which apply force between the slide plate and the second slider member to pull the second slider member upward and to pull the slide plate downward; and wherein spring means are provided to urge the second slider member into driving engagement with the intermediate rotatable member, when the Bowden cable is released.