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1. (WO2017156494) PISTON RING FOR REDUCTION OF CREVICE VOLUME

Pub. No.:    WO/2017/156494    International Application No.:    PCT/US2017/021965
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Sat Mar 11 00:59:59 CET 2017
IPC: F16J 9/00
F16J 9/20
Applicants: LIQUIDPISTON, INC.
Inventors: SHKOLNIK, Nikolay
SHKOLNIK, Alexander
Title: PISTON RING FOR REDUCTION OF CREVICE VOLUME
Abstract:
Embodiments of a piston ring reduce the volume of a crevice defined between the circumferential wall of a cylinder and a portion of the outer wall of a piston within the cylinder, the portion extending down from the top of the piston. The piston ring is configured such that pressurized fluid within the cylinder reliably urges a radial face of the piston ring to sealingly engage the circumferential wall of the cylinder, even as the piston reciprocates within the cylinder.