Patent ID: 6766616
Filing Date: 2004-07-27
Classification: A62C,E04D,E05F,E05Y

Abstract:
An opening flap, in particular flue gas escape flap, comprisinga frame (1); a flap (5) that is articulated to the frame (1); a holding device (8) for keeping the flap (5) in a closed position; a lift arm (10) which is mounted for pivoting about a first joint (11) that is stationary relative to the frame (1); a principal energy accumulator (12), a first end of which is articulated to a second joint (14) that is stationary relative to the frame (1), and a second end of which is articulated to the lift arm (10) by a third joint (13) at a distance from the first joint (11); and a secondary energy accumulator (16), a first end of which is articulated to the lift arm (10) between the first and the second joint (11, 13), and a second end of which is articulated to the flap (5); wherein, articulated to the lift arm (10) by a pivot joint (18) is a double-armed lever (17, 17â€²), to a first end, turned towards the principal energy accumulator (12), of which the secondary energy accumulator (16) is articulated by its first end, and to a second end, turned towards the flap (5), of which is articulated a first end of a tie (20) which is articulated by a second end relative to the frame (1).