Patent ID: 9267441
Filing Date: 2016-02-23
CPC Classification: F01D,F02C,F04D,F05D,F16J

Claim Text:
1. An apparatus, comprising: a bearing housing; a shaft assembly that extends through the bearing housing along a shaft axis; an annular groove that is formed on the shaft assembly and extends around the shaft axis; and a piston ring assembly that is engaged with the bearing housing and extends into the annular groove of the shaft assembly, the piston ring assembly including a first ring portion and a second ring portion, the first ring portion having a first contact face that is oriented at a non-perpendicular angle with respect to the shaft axis, and the second ring portion having an outer surface that is engaged with the bearing housing and a second contact face that is oriented at a non-perpendicular angle with respect to the shaft axis and is engageable with the first contact face, wherein the first contact face is oriented such that it faces outward with respect to the shaft axis and the second contact face is oriented such that it faces inward with respect to the shaft axis.