Pressure and temperature relief valve and diaphragm valve
First Claim
1. A temperature and pressure responsive relief valve assembly comprising a housing including an inlet and an outlet, and a fluid passageway in said housing interconnecting said inlet and said outlet and including a valve stop, a pressure responsive flexible member in said passageway and including a peripheral edge fixed to said housing and an annular combination first valve member and valve seat defining an opening forming a portion of said passageway and being movable relative to said valve stop, a thermally responsive assembly movably mounted in said passageway and including a thermally responsive actuator and a second valve member movable in response to operation of said actuator and relative to said combined first valve member and valve seat for seating engagement between stud second valve member and said combined rim valve member and valve seal and means in said passageway for biasing said combined first valve member and valve seat into engaged position on said valve stop and on said second valve member.
4 Assignments
0 Petitions
Accused Products
Abstract
A temperature and pressure responsive relief valve assembly preferably used in the cooling system of an internal combustion engine to control the rate of flow of a coolant fluid through the engine, which valve assembly comprises a housing having an inlet and an outlet, and a fluid passageway interconnecting the inlet and the outlet and including a valve seat, a pressure responsive diaphragm valve in the passageway and including a peripheral edge fixed to the housing and an annular combination valve member and valve seat defining an opening and forming a portion of the passageway and movable relative to the valve seat and movable toward the outlet in response to fluid pressure the inlet, a thermostat mounted in the passageway and including a valve member movable in response to operation of the thermostat, and a spring in the passageway for biasing the combination valve member and valve seat into a seated position on the valve seat and on the valve member, and a second spring for biasing the valve member into a seated position on the combination valve member and valve sent.
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Citations
23 Claims
- 1. A temperature and pressure responsive relief valve assembly comprising a housing including an inlet and an outlet, and a fluid passageway in said housing interconnecting said inlet and said outlet and including a valve stop, a pressure responsive flexible member in said passageway and including a peripheral edge fixed to said housing and an annular combination first valve member and valve seat defining an opening forming a portion of said passageway and being movable relative to said valve stop, a thermally responsive assembly movably mounted in said passageway and including a thermally responsive actuator and a second valve member movable in response to operation of said actuator and relative to said combined first valve member and valve seat for seating engagement between stud second valve member and said combined rim valve member and valve seal and means in said passageway for biasing said combined first valve member and valve seat into engaged position on said valve stop and on said second valve member.
- 10. A diaphragm valve for use in a pressure relief valve assembly including a housing having an inlet and an outlet, and a fluid passageway in the housing inter-connecting the inlet and the outlet and including an outer valve .[.stop.]. .Iadd.seat.Iaddend., and an inner valve seat mounted in the passageway, said diaphragm valve comprising a flexible diaphragm adapted to be located within the passageway and including a peripheral edge adapted to be fixed to the housing, and an annular valve member on said flexible diaphragm and defining an opening forming a portion of the passageway and being movable relative to said outer valve .[.stop.]. .Iadd.seat .Iaddend.and to said inner valve seat for seating engagement therewith.
- 16. A temperature and pressure responsive relief valve assembly comprising a housing including an inlet and an outlet, and a fluid passageway in said housing interconnecting said inlet and said outlet and including a valve stop, a pressure responsive flexible member in said passageway and including a peripheral edge fixed to said housing and an annular combination first valve member and valve seat defining an opening forming a portion of said passageway and being movable relative to said valve stop, a thermally responsive assembly movably mounted in said passageway and including a thermally responsive actuator extending through said opening and a second valve member movable in response to operation of said actuator and relative to said combined first valve member and valve seat for seating engagement between said second valve member and said combined first valve member and valve seat, means in said passageway for biasing said combined first valve member and valve seat into engaged position on said valve stop and on said second valve member, and means in said passageway for biasing said second valve member into a seated position on said combined first valve member and valve seat.
- 19. An engine including a metallic body defining a coolant passage, a temperature responsive valve assembly comprising a metallic part and including a thermostatic body including a temperature responsive valve member, and a pin extending from said thermostatic body, and means for supporting said temperature responsive valve assembly in said passage and for electrically isolating said metallic part of said temperature responsive valve assembly from said metallic body, said means including non-metallic means engaging said metallic body and said pin, and non-metallic means engaging said metallic body and said thermostatic body. .Iaddend. .Iadd.
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23. An engine including a metallic body defining a coolant passage, a temperature responsive valve assembly including a metallic part, a thermostatic body, and a pin extending from said thermostatic body, means for supporting said temperature responsive valve assembly in said passage and for electrically isolating said metallic part of said temperature responsive valve assembly from said metallic body, and a non-metallic pressure responsive member supported by said metallic body, extending across said passage, and including therein an opening affording coolant flow therethrough, wherein said metallic body defining said coolant passage comprises a metallic cylinder head and a removable metallic cover, wherein said temperature responsive valve assembly is selectively sealingly engagable with said pressure responsive valve member to open and close said opening, and wherein said means for supporting said temperature responsive valve assembly and for electrically isolating said metallic part from said metallic body comprises a non-metallic housing member located in said passageway and engaging said metallic body and including therein a coolant inlet communicating with said opening, a helical spring engaged between said non-metallic housing and said thermostatic body, and a non-metallic isolator located between said pin and said cover. .Iaddend. .Iadd.24. An engine including a metallic body defining a coolant passage, a temperature responsive valve assembly including a metallic part, means for supporting said temperature responsive valve assembly in said passage and for electrically isolating said metallic part of said temperature responsive valve assembly from said metallic body, and a non-metallic pressure responsive member supported by said metallic body, extending across said passage, and including therein an opening affording coolant flow therethrough, wherein said metallic body defining said coolant passage comprises a metallic cylinder head, wherein said temperature responsive valve assembly is selectively sealingly engagable with said pressure responsive member to open and close said opening, and wherein said means for supporting said temperature responsive valve assembly and for electrically isolating said metallic part from said metallic body comprises a non-metallic housing member located in said passageway and engaging said metallic body and including therein a coolant inlet communicating with said opening, a helical spring engaged between said non-metallic housing and said thermostatic body, and a non-metallic cover located between said pin and said cylinder head. .Iaddend.
Specification