Deicing system for a butterfly valve
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United States of America Patent
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Mar 19, 1996
Grant Date -
N/A
app pub date -
Aug 16, 1994
filing date -
Aug 18, 1993
priority date (Note) -
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Abstract
Auto-deicing system with a valve having a butterfly plate (5). The spindle (8) of the valve (4) is controlled by a system terminated by a pin (11) coaxial to the spindle (8) and which, like the latter, has slots (13). When the pin (8) is iced up, the control system initiates a movement of the pin (11) so that the slots (12, 13) come into extension with one another, which allows a circulation of the hot gas on one side of the butterfly plate (5) through the spindle (8), which is thus reheated. The opening movement resumes when the ice has melted. The invention is applicable to cold starting systems on aircraft engines. (FIG. 3 )
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