US 12,271,214 B2
Miniature passive thermal control valve for mixing or splitting single-phase fluid with adjustable thermal actuator
Mital Chandrakant Mistry, Richmond, TX (US); Zachary W. Leutwyler, Richmond, TX (US); Aaron P. Richie, Missouri City, TX (US); and Manmohan S. Kalsi, Houston, TX (US)
Assigned to KALSI ENGINEERING, INC., Sugar Land, TX (US)
Filed by KALSI ENGINEERING, INC., Sugar Land, TX (US)
Filed on Apr. 19, 2024, as Appl. No. 18/640,268.
Application 18/640,268 is a continuation of application No. 17/898,204, filed on Aug. 29, 2022, granted, now 11,989,043.
Claims priority of provisional application 63/360,049, filed on Aug. 30, 2021.
Prior Publication US 2024/0288886 A1, Aug. 29, 2024
Int. Cl. F16K 31/00 (2006.01); G05D 7/01 (2006.01)
CPC G05D 7/0126 (2013.01) [F16K 31/002 (2013.01)] 34 Claims
OG exemplary drawing
 
1. A passive thermal control valve for controlling flow of a system fluid, the control valve comprising:
a thermal actuator comprising:
an actuator body having an inner bore;
a stop engaging the actuator body;
a cylinder received within the inner bore of the actuator body, the cylinder having a cylinder bore open at one end;
an actuator spring within the inner bore of the actuator body biasing the cylinder towards the stop;
an actuator rod having a first end and a second end, the actuator rod at least partially received within the cylinder, at least a portion of the actuator rod and the rod second end allowed to extend through the open end of the cylinder bore;
a sealing element forming a seal between the actuator rod and the cylinder and defining a sealed chamber within the cylinder; and
a thermal fluid contained within the sealed chamber;
a valve body connected to the actuator body; and
a valve spool movably positioned within the valve body.