US 12,435,715 B2
Direct controlled variable displacement pumps with thermostatically controlled bypass
Ryan Prescott Susca, Windsor, CT (US); and Ryan Shook, Loves Park, IL (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on May 26, 2023, as Appl. No. 18/202,477.
Prior Publication US 2024/0392775 A1, Nov. 28, 2024
Int. Cl. F04B 49/24 (2006.01); F02C 7/22 (2006.01); F02C 9/30 (2006.01); F04B 7/00 (2006.01); F04B 49/00 (2006.01); F04B 49/06 (2006.01); F04B 49/08 (2006.01); F04B 49/16 (2006.01)
CPC F04B 49/24 (2013.01) [F02C 7/22 (2013.01); F02C 9/30 (2013.01); F04B 49/065 (2013.01); F04B 49/16 (2013.01); F04B 7/00 (2013.01); F04B 49/002 (2013.01); F04B 49/08 (2013.01); F04B 2205/11 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A system comprising:
a variable displacement pump (VDP) in fluid communication with an inlet line and with an outlet line; and
a bypass valve (BPV) including a BPV inlet in fluid communication with the outlet line, and a BPV outlet in fluid communication with a bypass line that feeds into the inlet line upstream of the VDP, wherein the BPV includes a thermostatic actuator configured to control recirculation flow amount through the BPV based on fluid temperature in the BPV; and
wherein the BPV includes a sensing line connecting the thermostatic actuator in fluid communication with the bypass line.