US 12,264,668 B2
Flapper valve with common rotational direction
Myles Kelly, Willimantic, CT (US); and Andrew J. Thompson, Ellington, CT (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Jun. 30, 2023, as Appl. No. 18/345,582.
Prior Publication US 2025/0003403 A1, Jan. 2, 2025
Int. Cl. F04B 53/10 (2006.01); F01D 17/14 (2006.01); F16K 15/03 (2006.01)
CPC F04B 53/1045 (2013.01) [F01D 17/148 (2013.01); F16K 15/036 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A flapper check valve comprising:
a valve seat body;
two flapper valve portions each mounted on their own shaft to the valve seat body, and pivotable between open and closed positions, with said flapper valve portions pivoting in a common rotational direction to the open position and to the closed position;
wherein a forward face at a first of the flapper valve portion facing a second of the flapper valve portions is straight and a forward face of the second of the flapper valve portions facing away from the first of the flapper valve portion is cylindrical; and
wherein the shafts of the flapper valve portions are at an intermediate location in each of the flapper valve portions such that when in the open position, one end of each of the flapper valve portions is above the valve seat body and an opposed end of each of the flapper valve portions has pivoted in the common direction to be below the valve seat body.