Patent ID: 6545203
Filing Date: 2003-04-08
Classification: E05D,E05F,E05Y,G10C

Abstract:
An opening and closing assist device for assisting in the opening and closing of a lid of a keyboard instrument, the opening and closing assist device comprising:first and second lid portions pivotably connected such that the lid has a closed position, an opened position and an intermediate neutral position; a damping mechanism for selectively damping relative pivotable motion between the first and second portions when the lid is pivoted from the closed position to the opened position and when the lid is pivoted from the opened position to the closed position, the damping mechanism, when pivoting the lid from the closed position to the opened position, being inactive during lid motion from the closed position to the neutral position while providing damping for the lid during lid motion from the neutral position to the opened position, and the damping mechanism, when pivoting the lid from the opened position to the closed position, being inactive during lid motion from the opened position to the neutral position while providing damping for the lid during lid motion from the neutral position to the closed position.