Patent ID: 6675824
Filing Date: 2004-01-13
Classification: F16K,G05D,Y10T

Abstract:
Valve comprising:a valve body comprising: an internal chamber having a longitudinal axis comprising an upstream compartment and a downstream compartment, said upstream compartment being of cylindrical cross section and of diameter Dam and said downstream compartment being of cylindrical cross section and of diameter Dav, with Damat least one fluid inlet orifice formed in the wall of said valve body and opening into the upstream compartment of the internal chamber, and at least one fluid outlet orifice; and a piston body movable in translation along the longitudinal axis inside at least one part of said internal chamber and located between said fluid inlet orifice and said fluid outlet orifice, said piston body having a front face located on a same side as the fluid inlet orifice, a rear face located on a same side as the fluid outlet orifice, and a lateral wall located between said front face and said rear face, said lateral wall of the piston body having at least a first portion of cylindrical cross section and of first diameter D1 and at least a second portion of cylindrical cross section and of second diameter D2, with D12, D22a wall of said valve body has an internal face forming an end wall of the upstream compartment, the front face of the piston body normally bearing against said internal face.