{HEAD ~ A limiter} 1 in which {TAIL ~ the obturator control flap} of the hydraulic valve is associated with the first pivoting arm through a linkage capable of transmitting a rotary movement of the axle of said flap, the hydraulic valve being distant from the pivoting arm control assembly 
{ HEAD ~ A limiter } 1 in which { TAIL ~ the obturator control flap } of the hydraulic valve is associated with the first pivoting arm through a linkage capable of transmitting a rotary movement of the axle of said flap , the hydraulic valve being distant from the pivoting arm control assembly
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