US 11,725,585 B2
Fuel delivery pump selection
Ryan Susca, Windsor, CT (US); Todd Haugsjaahabink, Springfield, MA (US); and Morgan O'Rorke, West Hartford, CT (US)
Assigned to Hamilton Sundstrand Corporation (HSC), Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation (HSC), Charlotte, NC (US)
Filed on Nov. 30, 2021, as Appl. No. 17/538,965.
Prior Publication US 2023/0167773 A1, Jun. 1, 2023
Int. Cl. F02C 7/236 (2006.01); F02C 7/232 (2006.01); F01D 21/00 (2006.01); F02C 9/26 (2006.01); F02C 9/18 (2006.01); F04B 41/06 (2006.01)
CPC F02C 7/236 (2013.01) [F01D 21/003 (2013.01); F02C 7/232 (2013.01); F02C 9/18 (2013.01); F02C 9/26 (2013.01); F04B 41/06 (2013.01); F05D 2220/32 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A pump selector system, comprising:
a primary pump fluidly connected to provide a primary flow to a fluid destination;
a secondary pump fluidly connected to provide a secondary flow to the fluid destination; and
a selector valve disposed downstream of the primary pump and the secondary pump configured to toggle between:
a first position configured to allow flow from the primary pump to flow to the fluid destination and to block flow from the secondary pump to the fluid destination; and
a second position configured to allow flow from the secondary pump to flow to the fluid destination and to block flow from the primary pump to the fluid destination; and
a controllable valve fluidly connected between a low pressure side of either one of the primary pump and/or the secondary pump, a high pressure side of the primary pump, and a back end of the selector valve, configured to provide a high back pressure to the selector valve in a first state of the controllable valve and configured to provide a low back pressure to the selector valve in a second state of the controllable valve.