US 11,733,722 B2
Adjustable deadband control system
Justin L. Masias, McKinney, TX (US)
Assigned to EMERSON PROCESS MANAGEMENT REGULATOR TECHNOLOGIES, INC., McKinney, TX (US)
Filed by EMERSON PROCESS MANAGEMENT REGULATOR TECHNOLOGIES, INC., McKinney, TX (US)
Filed on Sep. 22, 2021, as Appl. No. 17/481,828.
Application 17/481,828 is a division of application No. 16/180,241, filed on Nov. 5, 2018, granted, now 11,137,781.
Application 15/673,053 is a division of application No. 14/825,454, filed on Aug. 13, 2015, granted, now 9,760,097.
Application 16/180,241 is a continuation in part of application No. 15/673,053, filed on Aug. 9, 2017, granted, now 10,678,274.
Claims priority of provisional application 62/170,453, filed on Jun. 3, 2015.
Prior Publication US 2022/0004211 A1, Jan. 6, 2022
Int. Cl. G05D 16/16 (2006.01); F16K 17/10 (2006.01); G05D 16/00 (2006.01); F16K 1/52 (2006.01); F16K 31/126 (2006.01); F16K 17/02 (2006.01)
CPC G05D 16/163 (2013.01) [F16K 17/10 (2013.01); G05D 16/024 (2019.01); G05D 16/16 (2013.01); F16K 1/523 (2013.01); F16K 1/526 (2013.01); F16K 17/02 (2013.01); F16K 31/126 (2013.01); Y10T 137/7795 (2015.04); Y10T 137/7796 (2015.04)] 18 Claims
OG exemplary drawing
 
1. A control system, comprising:
a first pressure regulator comprising a fluid inlet, a fluid outlet, and an actuator assembly, the actuator assembly comprising a cavity and a diaphragm assembly disposed within the cavity and dividing the cavity into a first chamber and a second chamber;
a downstream fluid control device comprising a second fluid inlet in fluid communication with the fluid outlet of the first pressure regulator and a second fluid outlet in fluid communication with the first chamber of the first pressure regulator;
a first pilot in direct fluid communication with the second chamber of the actuator assembly and the fluid inlet, the first pilot having a first setpoint;
a second pilot in direct fluid communication with the second chamber of the actuator assembly, the fluid inlet, and the second fluid outlet, the second pilot having a second setpoint, less than the first setpoint;
wherein the first pilot and the second pilot are configured to:
fluidly couple the second chamber to the second fluid outlet with the control system in a first mode of operation;
isolate the second chamber from the second fluid outlet and the fluid inlet with the control system in a second mode of operation; and
fluidly couple the second chamber to the fluid inlet with the control system in a third mode of operation.