Opening flap, in particular flue gas escape flap, and opening mechanism therefor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jul 27, 2004
Grant Date -
Mar 4, 2004
app pub date -
Aug 27, 2003
filing date -
Aug 27, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An opening flap comprises a frame and a flap articulated thereto. A lift arm is provided, which is articulated by a principal energy accumulator. A secondary energy accumulator is articulated between the lift arm and the flap. The principal energy accumulator delivers the opening motion of the flap into a position before the dead center thereof. The secondary energy accumulator, which is distinctly weaker, delivers the subsequent opening motion.
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