US 11,906,063 B2
Pressure actuated switching valve
August M. Coretto, Windsor, CT (US); David J. Zawilinski, West Granby, CT (US); and Scott W. Simpson, Feeding Hills, MA (US)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Jan. 21, 2022, as Appl. No. 17/581,038.
Prior Publication US 2023/0235831 A1, Jul. 27, 2023
Int. Cl. F16K 15/06 (2006.01); F16K 27/02 (2006.01)
CPC F16K 27/0209 (2013.01) [F16K 15/063 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A pressure actuated switching valve comprising:
a valve chamber, wherein the valve chamber includes
a first chamber portion defining an inlet, the first chamber portion having a first inner diameter;
a second chamber portion defining an outlet, the second chamber portion having a second inner diameter that is greater than the first inner diameter;
a first sealing surface defined between the first chamber portion and the second chamber portion,
a third chamber portion having a third inner diameter that is greater than the first inner diameter;
a fourth chamber portion having a fourth inner diameter that is greater than first the inner diameter, and
a fifth chamber portion;
a second sealing surface defined at an interface of the fourth chamber portion and the fifth chamber portion; and
a valve member slidingly arranged in the valve chamber, wherein the valve member includes
a first section arranged in the second chamber portion, the first section having a first outer diameter that is greater than the first inner diameter and being configured to selectively engage the sealing surface;
a second section arranged in the third chamber portion, the second section having a second outer diameter that is closely matched to the third inner diameter, and
a third section arranged in the fourth chamber portion, the third section having a third outer diameter that is greater than the first outer diameter, the second outer diameter, and the second inner diameter, and being configured to selectively engage the sealing surface.