Abstract: An assembly including an outer member; an inner member; and a tolerance ring disposed between the inner member and the outer member, wherein the tolerance ring is a split ring comprising opposing edges, where the edges engaged with at one of the inner member or the outer member so as to prevent or restrict movement between the tolerance ring and at least one of the inner member or the outer member, or where the tolerance ring is deformed as installed between the inner member and the outer member and forms at least one buckled region in the tolerance ring due to an interference fit between the inner member and the outer member, where in an uninstalled state, the buckled region is absent.

Abstract: A seal system is provided. The seal system may comprise a first duct having an annular geometry, a second duct overlapping the first duct in a radial direction, and a seal disposed between the first duct and the second duct. The seal may comprise a groove defined by the first duct and a piston configured to slideably engage the groove.

Abstract: A butterfly-valve seat ring and fixing structure of the same, and an eccentric-type butterfly valve in which, the butterfly-valve seat ring has a flexible part (31) with a predetermined material thickness integrally and extendedly provided on one side surface of an inner diameter of a ring-shaped base body part (30) having a substantially rectangular shape in section and has a fixing part (32) integrally and extendedly provided on one side surface of an outer diameter of the base body part, has a recessed-shaped space part (40) provided between an outer circumferential surface (36) of the flexible part and an inner circumferential surface (37) of the fixing part, and has a seal contact part (35) provided to project at an inner diameter position of the flexible part. The seal contact part is positioned on an inner circumferential surface of the flexible part rather than a depth-side position of the space part.

Abstract: A tolerance ring that has a ring shape approximately circling along a predetermined direction includes a plurality of projections, wherein the curvature radiuses of end portions in a circling direction are smaller than the curvature radius of a portion other than the end portions in the circling direction.

Abstract: An oil control ring for a piston of an internal combustion engine has an annular body defining a central axis. The ring has a U-shaped cross-section formed of a centrally positioned web extending parallel to the axis and a pair of axially spaced rail portions integrally connected to the web. Each rail portion extends radially outwardly with respect to the web, and an extremity of each rail portion defines a land extending parallel to the axis and adapted to sealingly engage a cylinder wall. Each land defines a pair of spaced chamfered sidewalls. Each sidewall extends contiguously from each land to define a chamfered edge adjacent the land. Finally, each chamfered edge defines a concave annular sidewall. The result is a reduction of land surface area in contact with the cylinder walls of an engine to provide improved performance, particularly during the engine break-in period.