US 11,686,278 B2
High efficiency exhaust gas return system
Domenico Chiera, Fort Collins, CO (US); Gregory James Hampson, Boulder, CO (US); and Rohit Deepak Vaidya, Fort Collins, CO (US)
Assigned to Woodward, Inc., Fort Collins, CO (US)
Filed by Woodward, Inc., Fort Collins, CO (US)
Filed on Oct. 27, 2021, as Appl. No. 17/452,534.
Claims priority of provisional application 63/107,706, filed on Oct. 30, 2020.
Prior Publication US 2022/0136465 A1, May 5, 2022
Int. Cl. F02M 26/36 (2016.01); F02M 26/22 (2016.01); F02M 26/10 (2016.01); F02M 26/42 (2016.01); F02M 26/06 (2016.01); F02M 26/14 (2016.01); F02M 26/17 (2016.01); B01F 25/433 (2022.01); F02M 35/10 (2006.01)
CPC F02M 26/36 (2016.02) [B01F 25/4335 (2022.01); F02M 26/06 (2016.02); F02M 26/10 (2016.02); F02M 26/14 (2016.02); F02M 26/17 (2016.02); F02M 26/22 (2016.02); F02M 26/42 (2016.02); F02M 35/10222 (2013.01); F02M 35/10262 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A gas mixer comprising:
a convergent-divergent nozzle comprising a convergent portion and a divergent portion and defining a first gas flow path;
an air housing comprising an air inlet configured to supply air to the first gas flow path upstream of the convergent-divergent nozzle;
a gas housing defining a second gas flow path and comprising:
a first gas inlet configured to receive a secondary gas and allow the secondary gas into the second gas flow path;
a second gas inlet configured to receive the secondary gas and allow the secondary gas into the second gas flow path; and
a flapper valve comprising a pivoting a valve body that is configured to be urged into a first configuration by gas pressure of gas flow along the first gas inlet to permit gas flow along the first gas inlet and to block gas flow along the second gas inlet, and is configured to be urged into a second configuration by gas pressure of gas flow along the second gas inlet to permit gas flow along the second gas inlet and to block gas flow along the first gas inlet based on gas flow along the second gas inlet; and,
a gas nozzle positioned parallel to and centrally within the first gas flow path in the convergent portion of the convergent-divergent nozzle, the gas nozzle configured to supply the secondary gas to the first gas flow path upstream of the divergent portion.