US 11,989,043 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 Aug. 29, 2022, as Appl. No. 17/898,204.
Claims priority of provisional application 63/360,049, filed on Aug. 30, 2021.
Prior Publication US 2023/0069366 A1, Mar. 2, 2023
Int. Cl. F16K 31/00 (2006.01); G05D 7/01 (2006.01)
CPC G05D 7/0126 (2013.01) [F16K 31/002 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A passive thermal control valve comprising:
a thermal actuator comprising:
an actuator body having an inner bore;
an adjustment 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 actuator body biasing the cylinder towards the adjustment 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 allowed to extend through the open 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 cylinder; and
a valve body coupled to the actuator body, the valve body having first and second ports;
a lever mechanism connected to the valve body, the lever mechanism comprising a lever having first and second ends and a medial portion, the lever first end pin-connected to the valve body;
a valve spool connected to the lever second end, the valve spool arranged and designed to close the first port and allow a system fluid to flow through the second port, close the second port and allow the system fluid to flow through the first port, or allow the system fluid to flow through both the first and second ports.