US 11,892,083 B2
Piston seal ring
Liam P. Sullivan, Northborough, MA (US); Nicholas J. Lawliss, West Hartford, CT (US); Xuejun Liu, Avon, CT (US); John P. Virtue, Jr., Middletown, CT (US); and Kalpendu J. Parekh, Brookline, MA (US)
Assigned to RTX Corporation, Farmington, CT (US)
Filed by Raytheon Technologies Corporation, Farmington, CT (US)
Filed on Apr. 6, 2022, as Appl. No. 17/714,376.
Prior Publication US 2023/0323950 A1, Oct. 12, 2023
Int. Cl. F01D 11/00 (2006.01); F16J 9/20 (2006.01); F02C 7/28 (2006.01)
CPC F16J 9/20 (2013.01) [F01D 11/00 (2013.01); F01D 11/003 (2013.01); F01D 11/005 (2013.01); F02C 7/28 (2013.01); F05D 2220/32 (2013.01); F05D 2240/58 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A split ring seal comprising:
a first circumferential end and a second circumferential end;
an inner diameter surface and an outer diameter surface;
a first axial end face and a second axial end face;
a circumferentially distributed first plurality of open channels along the first axial end face; and
a circumferentially distributed second plurality of open channels along the second axial end face,
wherein:
the first circumferential end and the second circumferential end form a joint;
of the first plurality of open channels, two channels closest to diametrically opposite the joint are the largest in cross-sectional area; and
of the second plurality of open channels, two channels closest to diametrically opposite the joint are the largest in cross-sectional area.