Constant flow valve

Claim 1

A VALVE COMPRISING A FIRST AND A SECOND HOLLOW CASING PART, SAID FIRST PART FORMED WITH AN INTERNAL SHOULDER, SAID SECOND PART FORMED WITH AN INNER END DIMENSIONED TO FIT INSIDE SAID FIRST PART AND TO EXTEND IN CLOSE PROMIXITY TO SAID INTERNAL SHOULDER, MEANS FOR HOLDING SAID PARTS TOGETHER IN ASSEMBLED POSITION, AN INLET PORT IN SAID FIRST PART, AN OUTLET PORT IN SAID SECOND PART, SAID PORTS AXIALLY ALIGNED TRANVERSE TO THE PLANE OF SAID SHOULDER, AN INLET CHAMBER IN SAID FIRST PART INSIDE SAID INLET PORT AND ON THE SIDE OF SAID SHOULDER TOWARD SAID INLET PORT, AN OUTLET CHAMBER IN SAID SECOND PART SPACED INSIDE SAID OUTLET PORT, MEANS FORMING AN ORIFICE BETWEEN SAID OUTLET CHAMBER AND SAID INLET PORT, A DIAPHRAGM IN PROXIMITY TO SAID SHOULDER SEPARATING SAID INLET AND OUTLET CHAMBERS, MOUNTING MEANS FOR SAID DIAPHRAGM COMPRESSED BETWEEN THE INNER END OF SAID SECOND PART AND SAID SHOULDER WHEN SAID PARTS ARE IN ASSEMBLED POSITION, ORIFICE BLOCKING MEANS MOUNTED FOR MOVEMENT WITH SAID DIAPHRAGM TOWARD AND AWAY FROM SAID ORIFICE TO VARY THE EFFECTIVE AREA OF SAID ORIFICE, A SPRING BIASING AND BLOCKING MEANS AWAY FROM SAID ORIFICE, SAID CASING PARTS FORMED WITH A RESTRICTED FLOW BYPASS FROM SAID INLET CHAMBER AROUND SAID DIAPHRAGM AND INTO SAID OUTLET CHAMBER UPSTREAM OF SAID ORIFICE.