US 12,435,793 B2
Cryogenic fluid shut-off valve
Guangbin Cao, Shanghai (CN)
Assigned to Engineered Controls International, LLC, Elon, NC (US)
Appl. No. 18/550,961
Filed by Engineered Controls International, LLC, Elon, NC (US)
PCT Filed Nov. 17, 2021, PCT No. PCT/CN2021/131141
§ 371(c)(1), (2) Date Sep. 16, 2023,
PCT Pub. No. WO2022/199057, PCT Pub. Date Sep. 29, 2022.
Claims priority of application No. PCT/CN2021/082371 (WO), filed on Mar. 23, 2021.
Prior Publication US 2024/0142000 A1, May 2, 2024
Int. Cl. F16K 1/02 (2006.01); F16K 1/48 (2006.01); F16K 27/02 (2006.01); F16K 31/50 (2006.01); F16K 41/10 (2006.01)
CPC F16K 1/02 (2013.01) [F16K 1/48 (2013.01); F16K 27/02 (2013.01); F16K 31/508 (2013.01); F16K 41/106 (2013.01)] 19 Claims
OG exemplary drawing
 
14. A shut-off valve for use with cryogenic fluid, the shut-off valve comprising:
a valve body defining a flow path, an inlet of the flow path, an outlet of the flow path, and a valve seat located along the flow path between the inlet and the outlet;
a bonnet coupled to the valve body and defining a bonnet chamber that extends along a longitudinal axis of the bonnet and connects to the flow path;
a plug configured to move along the longitudinal axis of the bonnet between a closed position at which the plug sealingly engages the valve seat and an open position at which the plug is disengaged from the valve seat; and
a stem coupled to the plug and housed within the bonnet chamber of the bonnet, wherein the stem is configured to move along the longitudinal axis of the bonnet to cause the plug to move between the open position and the closed position, wherein the stem includes one or more buffers, wherein each of the one or more buffers includes ringed arms that are stacked and spaced apart from each other along an axis of the stem.