Temperature regulating valve

Claim 1

A UNITARY CAGE AND PILOT VALVE STRUCTURE TO PRECISELY REGULATE THE RATE OF FLOW OF A FLUID PASSING FROM THE UPSTREAM TO DOWNSTREAM SIDE OF THE VALVE TO A LEVEL THAT IS PROPORTIONATE TO THE TEMPERATURE OF A CONDITION BEING SENSED BY A TEMPERATURE-RESPONSIVE MEANS, THE IMPROVEMENT COMPRISING THE PROVISION OF A RESTRICTED PASSAGEWAY CONNECTING A CHAMBER COMPRISED OF AN INNER WALL OF A PLUG AND AN ASSOCIATED INNER WALL OF A CAGE WITH THE FLUID PRESSURE ON THE UPSTREAM SIDE OF THE VALVE, A PASSAGEWAY CONNECTING THE CHAMBER WITH THE FLUID PRESSURE ON THE DOWNSTREAM SIDE OF THE VALVE, A PLUG OF A PILOT VALVE OPERABLY CONNECTED FOR MOVEMENT WITH A TEMPERATURERESPONSIVE MEANS INTO AND OUT OF PRESELECTED RESTRICTED POSITIONS WITH ONE END OF THE LAST-MENTIONED PASSAGEWAY, A SPRING BIASED PLUG MOUNTED FOR SLIDABLE MOVEMENT WITHIN THE CHAMBER, AND A FORCE BALANCE FEEDBACK SPRING POSITIONED FOR COMPRESSED MOVEMENT AT ONE OF ITS ENDS BY THE PLUG OF THE PILOT VALVE AND POSITIONED FOR SUBSTANTIALLY SIMULTANEOUS COMPRESSED MOVEMENT AT ITS OTHER END BY THE PLUG THAT IS IN SLIDABLE ENGAGEMENT WITH THE CAGE.