Patent ID: 7493933
Filing Date: 2009-02-24
Classification: B60J

Abstract:
1. A retractable window shade, comprising: at least one spool assembly, including; a spool having film windable thereupon with opposing film edges having spaced perforations extending therealong; a motor; a clutch assembly, disposed at one end of the spool, configured to rotatably couple the motor to the spool; the clutch assembly comprising a clutch gear axially slidable on a spool shaft and being disposed on a proximal side of a motor gear and having opposing sides with a circumferential clutch groove being disposed on one of the sides and a plurality of clutch posts extending axially outwardly from the other one of the sides; an axially movable sling having a pair of forks, the sling being operatively coupled to the clutch gear for effectuating axial movement thereof, the forks being sized and configured complementary to the clutch groove so as to be slidingly engageable therewithin; a main gear rotatably mounted on the spool shaft and being engaged to the motor gear and having a plurality of through holes equal in quantity to the clutch posts and being configured for slidingly passing the clutch posts therethrough; and a sleeve gear rotatably mounted on the spool shaft on a side of the main gear opposite that of the clutch gear and having a plurality of bores extending at least partially therein, the bores being equal in quantity to and sized complementary to the clutch posts; wherein axial movement of the sling and clutch gear causes engagement of the clutch posts to the bores causing rotation of the sleeve gear in unison with the main gear; and at least one sprocket coupled to the motor and being˜disposed in alignment with the perforations; and at least one track assembly oriented generally perpendicularly relative to the spool assembly and including a drive chain engaged to the sprocket and being configured to engage the perforations for extending and retracting the film during activation of the motor.