US 11,692,635 B2
Pressure relief device
David Neil Morgan, Weston, NE (US); Michael Gregory Volkmer, Lincoln, NE (US); Chad Alvin Cederberg, Lincoln, NE (US); and Glen Edward Lampe, Lincoln, NE (US)
Assigned to Agility Fuel Systems LLC, Costa Mesa, CA (US)
Filed by Agility Fuel Systems LLC, Costa Mesa, CA (US)
Filed on Nov. 22, 2021, as Appl. No. 17/456,004.
Application 17/456,004 is a continuation of application No. 17/138,391, filed on Dec. 30, 2020, granted, now 11,187,336.
Application 17/138,391 is a continuation of application No. PCT/US2020/061982, filed on Nov. 24, 2020.
Claims priority of provisional application 62/939,993, filed on Nov. 25, 2019.
Prior Publication US 2022/0082173 A1, Mar. 17, 2022
Int. Cl. F16K 17/38 (2006.01); F16K 17/02 (2006.01); F17C 13/04 (2006.01)
CPC F16K 17/025 (2013.01) [F17C 13/04 (2013.01); F17C 2205/0332 (2013.01); F17C 2221/033 (2013.01); F17C 2260/042 (2013.01); F17C 2270/0168 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A pressure relief valve comprising:
a body;
a vent passage disposed through the body and at least partially enclosed by a vent passage wall, the vent passage having a first end configured to be placed in fluid communication with an internal volume of a tank and a second end configured to be placed in fluid communication with the atmosphere;
a plug moveably mounted in the vent passage, the plug comprising a seal end forming a seal with the vent passage wall and a control end spaced apart from the seal end;
a latch comprising an elongate body extending from a proximal end to a distal end, the latch being rotatably mounted to the body at a location that defines an axis, and having a blocking portion projecting laterally from the elongate body between the proximal end and the distal end, the latch being configured to move from a first position to a second position when rotated about the axis, causing the blocking portion to be out of contact with the control end of the plug to allow movement of the plug in the vent passage; and
a shape memory alloy wire configured to shorten when exposed to a temperature above a threshold temperature to cause the latch to rotatably move from the first position to the second position, allowing the plug to move in the vent passage to allow gas in the tank to flow through the pressure relief valve to the second end of the vent passage and out of the pressure relief valve to the atmosphere.