Plastic-metal valve

Claim 1

IN COMBINATION: A PLASTIC VALVE BODY HAVING A FACE THEREOF PROVIDED WITH A POCKET CONSTITUTING AN INLET CHAMBER FOR THE VALVE BODY; SAID POCKET HAVING A BACK WALL FORMED WITH A FLOW OPENING THEREIN FOR CONDUCTING LIQUID FROM THE INLET CHAMBER; A RESILIENT FLOW CONTROL MEMBER POSITIONED IN SAID POCKET FOR DEFORMATION IN THE DIRECTION OF THE BACK WALL TO PROVIDE A SUBSTANTIALLY CONSTANT LIQUID FLOW THROUGH THE CHAMBER IRRESPECTIVE OF SUBSTANTIAL VARIATIONS IN LIQUID SUPPLY PRESSURE; A RETAINER DISPOSED WITHIN THE POCKET UPSTREAM OF THE FLOW CONTROL MEMBER TO RETAIN SAME IN ITS OPERATIVE POSITION; A HAT-LIKE SCREEN POSITIONED IN SAID INLET CHAMBER UPSTREAM OF SAID RETAINER TO FILTER THE LIQUID PRIOR TO ITS PASSAGE ACROSS THE FLOW CONTROL MEMBER; AN ANNULAR GROOVE FORMED IN SAID VALVE BODY FACE SURROUNDING THE AFOREMENTIONED POCKET; A TUBULAR METAL COUPLING MEMBER HAVING A FACE THEREOF ENGAGING SAID VALVE BODY FACE; A DEFORMABLE GASKET POSITIONED IN SAID GROOVE IN SEALING ENGAGEMENT WITH THE GROOVE SURFACE AND COUPLING MEMBER FACE; MOUNTING BRACKET MEANS FOR THE VALVE BODY COMPRISING A FIRST APERTURED PORTION ADAPTED TO SEAT ON A MOUNTING SURFACE, AND A SECOND PORTION CONNECTED WITH THE TUBULAR METAL COUPLING MEMBER; AND SECURING DEVICES EXTENDING BETWEEN THE BRACKET MEANS AND PLASTIC VALVE BODY TO DRAW THE VALVE BODY TIGHTLY AGAINST THE AFOREMENTIONED FACE OF THE COUPLING MEMBER.