Patent ID: 6191886
Filing Date: 2001-02-20
Classification: G03B

Abstract:
A video projection screen assembly comprising:a) a screen structured to have video images projected thereon and formed of a material having sufficient flexibility to be disposed between an expanded position and a collapsed position,b) a support frame attached in supporting relation to said screen and structured to dispose and maintain said screen in a flat, vertical orientation when said screen is in said expanded position,c) said support frame comprising a first portion connected to said screen and moveable therewith, and a base portion fixedly disposed relative to said screen and said first portion when said screen travels between said expanded and collapsed positions,d) said support frame further comprising a positioning assembly movably interconnected with said first portion and structured to facilitate travel of said screen from said collapsed position to said expanded position,e) said positioning assembly including at least one piston assembly positionable between a compressed position and an extended position and disposed in driving relation to said first portion and accordingly said screen connected thereto,f) said at least one piston assembly cooperatively structured with a remainder of said positioning assembly to normally bias and maintain said screen in said expanded position,g) said piston assembly including a gas spring structured to expand with sufficient force so as to urge and maintain said first portion of said support frame and accordingly said screen connected thereto in said expanded position, andh) said positioning assembly further including an auxiliary spring assembly interconnected between said base portion and said first portion and cooperatively structured with said gas spring to further bias said screen towards and into said expanded position.