US 11,746,710 B2
Hydraulically rate limited valve
Morgan O'Rorke, West Hartford, CT (US); Ryan Susca, Windsor, CT (US); and Todd Haugsjaahabink, Springfield, MA (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Nov. 23, 2021, as Appl. No. 17/533,668.
Prior Publication US 2023/0160349 A1, May 25, 2023
Int. Cl. F02C 9/00 (2006.01); F02C 9/26 (2006.01); F02C 3/00 (2006.01)
CPC F02C 9/263 (2013.01) [F02C 3/00 (2013.01); F05D 2220/32 (2013.01); F05D 2240/35 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A fluid flow system comprising:
a main valve having a spool, a first chamber, and a second chamber, wherein a pressure difference between the first chamber and the second chamber is configured to move the spool to control a fluid flow;
an electromechanical interface device (EMID) in fluid communication with at least one of the first and second chambers of the main valve, the EMID configured to meter fluid from a first source and a second source to at least one of the first chamber and the second chamber, wherein the first source has a different pressure from the second source; and
wherein the first chamber is in communication with the EMID via a first fluid line and the second chamber is in communication with the EMID via a second fluid line, with a first fixed orifice on the first fluid line and a second fixed orifice on the second fluid line, with both of said first and second fixed orifices being between the main valve and the EMID; wherein the first fluid line is structurally separate from the second fluid line.