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US 11,988,299 B2Granted
Slam shut thermally triggered valve
AssigneeBellofram Corporation
InventorChuang Ji
Life of this patent
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Abstract
The subject innovation relates to a thermally triggered valve assembly that comprises a dual diaphragm subassembly which in turn employs a removeable thermal fuse configured to cause the valve assembly to close upon a predetermined temperature threshold being exceeded.
Claims18
A slam shut valve assembly, comprising:
- a dual-diaphragm subassembly comprising an upper diaphragm and a lower diaphragm;
- and
- a spacer comprising a threaded hole;
- a threaded thermal screw device comprising a thermal fuse installed in said threaded hole of said spacer;
- wherein the slam shut valve assembly is configured to shut off the gas flow:
- (i) when a sensing pressure applied underneath the lower diaphragm of the dual-diaphragm subassembly exceeds a predetermined pressure threshold, and (ii) when product temperature exceeds a predetermined temperature threshold that is a function of a melting point of the thermal fuse causing the thermal fuse to rupture and allow communication of the sensing pressure past the thermal fuse to an area underneath the upper diaphragm.
3 more elements
Dependencies are inferred from the claim text.