Reverse acting poppet -type thermostatic valve construction

Claim 1

IN COMBINATION: A UNITARY MOUNTING BODY HAVING AN OUTER MOUNTING FLANGE, A FRUSTO-CONICAL VALVE SEAT, AN UPWARDLY DIRECTED FLUID FLOW CONSTRUCTION ABOVE SAID VALVE SEAT AND A THRUST SEAT CENTRALLY OF SAID FLUID FLOW CONSTRUCTION; A POWER UNIT HAVING AN EXPANSION PISTON ENGAGING SAID THRUST SEAT AND HAVING A MAIN BODY EXTENDING DOWNWARDLY PAST SAID VALVE SEAT WITH A HEAT SENSITIVE ELEMENT ADJACENT THE BOTTOM OF SAID MAIN BODY; UPPER SPRING END RECEIVING MEANS ON SAID MAIN BODY; A VALVE SEALED AND SECURED TO SAID MAIN BODY AND HAVING AN UPWARD CIRCULAR EDGE GUIDABLY ENGAGEABLE WITH THE UNDER SURFACE OF SAID FRUSTO-CONICAL VALVE SEAT; A LOWER SPRING END SUPPORTING RECEIVER BELOW SAID VALVE SEAT AND SUPPORTED FROM SAID MOUNTING BODY AT A POINT SPACED BELOW SAID THRUST SEAT OF SAID MOUNTING BODY BY A FLUID FLOW PERMITTING PART OF SAID LOWER SPRING RECEIVER THAT PERMITS FLOW FROM SAID VALVE SEAT TO PASS THROUGH SAID FLUID FLOW PART TO SAID FLOW CONSTRUCTION; AND A COMPRESSION SPRING HAVING ITS UPPER END ENGAGING SAID UPPER SPRING END RECEIVING MEANS AND HAVING ITS LOWER END ENGAGING SAID LOWER SPRING END SUPPORTING RECEIVER.