Patent ID: 7451803
Filing Date: 2008-11-18
Classification: E06B,Y10T

Abstract:
1. A screening device for positioning a screening material, comprising: a moveable drive apparatus for moving a screening material from proximate a first position to proximate a second position, the moveable drive apparatus including a drive mechanism in a first or a second state and an encapsulating part, the moveable drive apparatus being configured to be manually or automatically adjustable to the first and second positions, or to a desired position therebetween, at least a portion of the encapsulating part being disposed about and connected to at least a portion of the drive apparatus, wherein the moveable drive apparatus, when manually adjusted, is configured to disrupt a power-transmitting connection with the drive mechanism thereby changing the drive mechanism from the first state to the second state and wherein the drive mechanism is adjusted from the first state to the second state by disengaging a drive wheel of the drive mechanism from a guide rail of the screening device.