Throttling device

1. A throttling device comprising : a body (1), a cavity (2) formed by a hollow in the body (1), a sleeve (3) defining in the cavity (2) at least a first chamber (9) and second chamber (10), means (11) for introducing fluid to be throttled into said first chamber (9), a seat (18, 19) formed on said sleeve (3) and including at least one orifice (20) for placing said first and second chambers (9, 10) in communication, a movable valve (21) within said sleeve (3) to cooperate with said seat (18, 19), said valve being displaceable between two positions referred to as the open and closed positions of the orifice (20), means (14, 15, 16, 17) for evacuating said fluid from said second chamber (10), characterised by the fact that it comprises : an abutment (43), said abutment being adapted to co-operate with said valve (26, 21), a piston (42) connected to said abutment (43) and sliding in a cylinder (41), a compressible fluid in said cylinder (41). La présente invention concerne un dispositif de laminage. Le dispositif se caractérise essentiellement par le fait qu'il comprend dans un corps 1, deux chambres 9, 10, délimitées par une chemise 3 comportant un siège 18, 19, un clapet 21, qui peut être commandé en position et/ou en force de rappel, de façon déterminée au moyen d'un piston 42 dans un cylindre 41 alimenté en fluide compressible et/ou incompressible. Le dispositif trouve une application particulièrement avantageuse dans les amortisseurs fluidiques.