US 11,874,010 B2
Parallel flow and counterflow insulated preconditioned air delivery and recirculation system
Christopher J. Giblin, Irving, TX (US); William Tyler, North Richland Hills, TX (US); and Joe D Gracey, Lewisville, TX (US)
Assigned to TWG Supply, LLC, Grapevine, TX (US)
Filed by TWG Supply, LLC, Grapevine, TX (US)
Filed on Jan. 29, 2021, as Appl. No. 17/162,383.
Application 17/162,383 is a continuation of application No. 16/585,229, filed on Sep. 27, 2019, granted, now 10,907,850.
Claims priority of provisional application 62/738,142, filed on Sep. 28, 2018.
Prior Publication US 2021/0231334 A1, Jul. 29, 2021
Int. Cl. F24F 11/48 (2018.01); B64F 1/36 (2017.01); B60H 1/00 (2006.01); F24F 13/06 (2006.01); F24F 13/02 (2006.01)
CPC F24F 11/48 (2018.01) [B60H 1/00564 (2013.01); B64F 1/364 (2013.01); F24F 13/0272 (2013.01); F24F 13/06 (2013.01); F24F 2221/125 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An insulating preconditioned air delivery system, for connecting to a PCA airflow from a PCA unit flowing in a downstream direction, comprising:
a supply hose to carry a supply airflow;
an annular parallel flow channel to carry a parallel insulating airflow;
said annular parallel flow channel concentrically surrounding the supply hose;
an annular counterflow channel to carry an insulating counterflow in an upstream direction;
said annular counterflow channel concentrically surrounding the annular parallel flow channel; and
a counterflow intake hose to fluidically connect the annular counterflow channel to a supplemental air intake on the PCA unit.