High pressure high temperature valve assemblies

Claim 1

A VALVE ASSEMBLY FOR CONTROLLING FLUIDS AT HIGH TEMPERATURES COMPRISING A HOUSING, A PORTED VALVE SEAT IN SAID HOUSING, AN INLET AND AN OUTLET VALVE PASSAGE CONNECTED TO EACH SIDE OF SAID SEAT, A VALVE DISK RECEIVABLE UPON THE SEAT TO CONTROL FFLUID PASSING THROUGH THE VALVE SEAT, A VALVE STEM SECURED AT ONE END TO THE VALVE DISK AND EXTENDING THEREFROM WITHIN THE HOUSING, AN HERMETICALLY SEALED CONTROL CHAMBER IN THE HOUSING RECEIVING SAID STEM AND HAVING LOWER PORTION ADJACENT THE VALVE DISK, A BELLOWS WITHIN THE LOWER CONTROL CHAMBER PORTION AROUND THE VALVE STEM, AN OPENING IN SAID HOUSING COMMUNICATING WITH SAID OUTLET VALVE PASSAGE AND SAID CHAMBER TO CONDUCT HIGH TEMPERATURE FLUID WITHIN SAID OUTLET VALVE PASSAGE TO THE INTERIOR OF SAID BELLOWS, SAID BELLOWS BEING HERMETICALLY SEALED AND SECURED AT ONE END TO SAID HOUSING AROUND SAID OPENING AND AT ITS OPPOSITE END TO SAID VALVE STEM TO FORM A FLUID RECEIVING COMPARTMENT WITHIN SAID BELLOWS, SAID CONTROL CHAMBER HAVING AN UPPER PORTION IN THE HOUSING SPACED FROM SAID LOWER PORTION, A BELLOW ASSEMBLY WITHIN THE UPPER PORTION OF THE CONTROL CHAMBER AROUND THE VALVE STEM, SAID BELLOWS ASSEMBLY SECURED AT ONE END TO THE HOUSING AND AT ITS OPPOSITE END TO THE VALVE STEM, A QUANTITY OF LIQUID FILLING THE SPACE WITHIN SAID HERMETICALLY SEALED CONTROL CHAMBER AND IN CONTACT WITH THE OUTER SURFACES OF SAID BELLOWS AND BELLOWS ASSEMBLY, SAID HOUSING INCLUDING AN ELONGATED TUBULAR HEAT DISSIPATING VALVE GUIDE PORTION INTERCONNECTING THE LOWER AND UPPER PORTIONS OF SAID CHAMBER AND DISPOSED ABOUT THE VALVE STEM WHEREBY THE HIGH TEMPERATURE IMPRESSED UPON THE BELLOWS BY THE FLUID PASSING THROUGH THE VALVE IS