Patent ID: 6027315
Filing Date: 2000-02-22
Classification: F04B,F04C,Y10T

Abstract:
An inlet control valve for a compressor comprising a valve housing defining an inlet passage and an outlet passage, a valve seat separating said inlet passage from said outlet passage, cooperating valve cooperating with said valve seat for opening and closing said inlet control valve, a piston a piston, chamber receiving said piston, a slidable connection connecting said piston to said cooperating valve, a multi-function orifice opening into said inlet passage adjacent to said valve seat, an oil sump positioned in said inlet passage adjacent to said multifunctional orifice in postion to receive oil blown from said multi-functional orifice during blow down and to permit said oil to be entrained in air passing through said inlet passage, a connecting passage interconnecting said multi-function orifice and said piston chamber for fluid flow therebetween, means connecting said connecting passage to a line for fluid flow from a high pressure side of said compressor for delivering compressed fluid compressed by the compressor to said connecting passage, said multi-function orifice means being sized to function as a continuous bleed orifice from said line and as a blow down orifice at appropriate times in the operation of said inlet control valve.