Pressure relief device
US12292127B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2023 |
| Grant date | May 6, 2025 |
| Priority date | — |
| Expiry date | May 19, 2043 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF17C2270/0178
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pressure relief valve configured to vent a pressurized tank in the event of a fire is provided. The pressure relief valve includes a body, a vent passage, a plug and a latch. The vent passage is disposed through the body. The vent passage can be placed in fluid communication with an internal volume of a tank and with the atmosphere. The plug is moveably mounted in the vent passage. The latch has a blocking member disposed in contact with a control end of the plug in a first configuration and out of contact with the control end in a second configuration. The second configuration allows movement of the plug in the vent passage. One or both of a shape memory alloy wire and a trigger piston is configured to actuate the latch from the first to the second configuration. The shape memory alloy wire is configured to shorten when exposed to a temperature above a threshold temperature. The trigger piston moves, e.g., by a pressurized gas, in a trigger actuation passage to actuate the latch from the first configuration to the second configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.