US 12,188,457 B2
Sealing ring assemblies configured for pressure locking
Matt Svrcek, Redwood City, CA (US); and Jodie Prudhomme, San Francisco, CA (US)
Assigned to Mainspring Energy, Inc., Menlo Park, CA (US)
Filed by Mainspring Energy, Inc., Menlo Park, CA (US)
Filed on Nov. 16, 2022, as Appl. No. 17/988,048.
Application 17/988,048 is a continuation of application No. 16/575,744, filed on Sep. 19, 2019, granted, now 11,530,691.
Application 16/575,744 is a continuation of application No. 16/100,131, filed on Aug. 9, 2018, granted, now 10,443,727, issued on Oct. 15, 2019.
Claims priority of provisional application 62/543,302, filed on Aug. 9, 2017.
Claims priority of provisional application 62/543,299, filed on Aug. 9, 2017.
Prior Publication US 2023/0072947 A1, Mar. 9, 2023
Int. Cl. F04B 1/00 (2020.01); F04B 1/0448 (2020.01); F15B 15/00 (2006.01); F16F 9/36 (2006.01); F16J 1/09 (2006.01); F16J 9/16 (2006.01); F16J 9/22 (2006.01); F16J 9/28 (2006.01); F16J 15/34 (2006.01)
CPC F04B 1/00 (2013.01) [F04B 1/0448 (2013.01); F15B 15/00 (2013.01); F16F 9/368 (2013.01); F16J 1/09 (2013.01); F16J 9/16 (2013.01); F16J 9/22 (2013.01); F16J 9/28 (2013.01); F16J 15/3488 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A piston assembly for translating along a bore of a cylinder, wherein the piston assembly comprises a sealing ring comprising a first ring segment and a second ring segment, the first ring segment comprising:
a recess in a first surface of a first axial side of the first ring segment, wherein the recess is distinct from radial ends of the first ring segment; and
a passage extending from a second axial side of the first ring segment, opposite the first axial side, to the recess, wherein the passage is in fluid communication with the recess, and wherein the first surface and a second surface of the second ring segment are to be in contact at a contact interface while the piston assembly translates along the bore of the cylinder, causing the recess to be covered by the second surface.