US 11,835,408 B2
Pressure gauges, pressure vessel assemblies, and methods of displaying pressure within pressure vessel assemblies
Thomas Carl Kjellman, Uxbridge, MA (US)
Assigned to CARRIER CORPORATION, Palm Beach Gardens, FL (US)
Appl. No. 15/734,861
Filed by Carrier Corporation, Palm Beach Gardens, FL (US)
PCT Filed Aug. 24, 2020, PCT No. PCT/US2020/047608
§ 371(c)(1), (2) Date Dec. 3, 2020,
PCT Pub. No. WO2021/041302, PCT Pub. Date Mar. 4, 2021.
Claims priority of provisional application 62/892,816, filed on Aug. 28, 2019.
Prior Publication US 2022/0187151 A1, Jun. 16, 2022
Int. Cl. G01L 19/04 (2006.01); G01L 7/04 (2006.01)
CPC G01L 19/04 (2013.01) [G01L 7/041 (2013.01); G01L 7/043 (2013.01); G01L 7/045 (2013.01); G01L 7/048 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A pressure gauge, comprising:
a housing having an inlet;
a helical tube arranged within the housing with a closed end and an open end, the open end of the helical tube in fluid communication with the inlet; and
a compensation member arranged between the open end and the closed end of the helical tube, the compensation member fixed to the helical tube,
wherein the compensation member and the helical tube are formed from materials having different coefficients of thermal expansion to limit movement of the closed end of the helical tube due to temperature change of a compressed fluid in fluid communication with the helical tube.