Abstract: The invention relates to an internally clamping rectangular seal (40) for sealing a shaft (20) with respect to a housing (10), wherein the rectangular seal can be inserted into a groove (13) disposed circumferentially on a shaft bore (12), wherein the rectangular seal is interrupted along its circumferential direction at a joint (42) and two ring-end sections (43, 44) are formed, and wherein the rectangular seal has an outer surface (40.4) facing radially outwards, an inner clamping surface (40.1) facing radially inwards and opposing flank surfaces (40.3) facing in the axial direction. Therefore, provision is made that at least one contact ramp (45.1, 45.2, 45.

Abstract: Systems and assemblies are provided for sealing an interface between a cylinder and a manifold corresponding to the cylinder. The cylinder comprises at least one port. A manifold interface is arranged adjacent to the at least one port. A seal is located inside of a circumferential pocket, wherein the circumferential pocket comprises at least a portion of the manifold interface. A spring is configured to preload the seal radially inward so that the seal stays in contact with the outer surface of the cylinder.

Abstract: A scraper ring for a piston includes a top surface, a bottom surface, an inner surface, and an outer surface. The top surface has a first planar portion and a first angled portion. The bottom surface has a second planar portion and a second angled portion. The second angled portion is configured to slidably contact the first angled portion to adjust a diameter of the scraper ring. The inner surface connects the top surface to the bottom surface. The outer surface is opposite to the top surface and is configured to form 360 degrees of contact with a wall of a cylinder to substantially limit an amount of oil entering a combustion chamber of the cylinder.

Abstract: Provided is a piston ring for an internal combustion engine that enables size reduction of a chamfered edge without leading to the chipping, and sufficient size reduction of a flow passage of a blow-by gas in a piston ring gap, thus effectively restraining the blow-by gas from passing through the piston ring gap. A piston ring 1 with a piston ring gap 2 used for an internal combustion engine includes a chamfered edge 3 continuous to at least one of piston ring end faces at the piston ring gap 2 and an outer peripheral surface 1a of the piston ring 1. The chamfered edge 3 has a curved shape.

Abstract: A metal gasket bellows seal includes a first ply and a second ply coupled to the first ply at a first location via spot joining at one or more locations.

Abstract: A wear ring for a piston of a die-casting apparatus comprises an annular body having a gap extending therethrough. The gap is configured to define at least two circumferentially offset pairs of circumferentially spaced apart facing surfaces. The facing surfaces of each pair are angled and configured to contact each other in a flush manner when the wear ring is circumferentially compressed.

Abstract: An improved piston ring for use as an intermediate piston ring in a piston assembly having three or more piston rings is provided. The piston ring includes a piston ring body which extends through an arcuate shape between opposite end faces. The piston ring body has at least one combustion gas guidance feature for allowing a greater flow of combustion gasses to pass the piston ring body when the piston is moving in one direction and for allowing a lesser flow of combustion gasses to pass the piston ring body when the piston is moving in an opposite direction. This allows for the ring gap at the outer diameter of the piston ring to be minimized without creating flutter in another piston ring above the intermediate piston ring during operation of an engine.

Abstract: A seal ring that seals an annular gap formed between a shaft and a housing that has a shaft hole into which the shaft is inserted. The seal ring is configured such that one of both the ends and has a projection projecting in the direction of the circumference of the seal ring. The other end has a recess used in combination with the projection. The seal ring is characterized in that the recess has an inclining side face, which inclines from the direction of the circumference, and the projection and the recess form a sliding part so that a part of the edge of the leading end of the projection slides over the inclining side face of the recess, and portion of the sliding part is formed as a linear sliding portion.

Abstract: A locking joint seal includes a ring-shaped body made from poly tetra fluoroethylene and having a first end and a second end. The first and second ends each include mutually engageable first and second locking features. The first locking feature including a first axially extending portion overlapping a second axially extending portion of the second locking feature in an assembled condition.

Abstract: The invention relates to a piston ring (1) for the piston of an internal combustion engine, the ring comprising a ring gap (2) with a respective outer gap region (5, 6) in the vicinity of the upper flank (3) of the piston ring (1), the flank facing the combustion chamber and the lower flank (4) facing away from the combustion chamber, the gap region running perpendicular to the two flanks (3, 4). The ring gap also comprises a central region (7) that interconnects the two outer gap regions (5, 6) and runs obliquely to the flanks (3, 4) of the piston ring (1).

Abstract: A dual seal assembly for providing a seal between a reciprocating rod and the gland is described. The dual seal includes first and second axially adjacent annular seal elements. The first seal element is constructed of a material having a different hardness than the material forming the second seal element. The first and second seal elements each include a seal edge contacting the rod to provide a respective seal between the first and second seal element and the rod. At least a portion of one of the first seal element and the second seal element engages the gland to form the seal between the rod and the gland. By varying the hardness of the materials forming the seal elements, the first seal element and the second seal element can be configured to provide different functions within the dual seal assembly and can cooperatively provide an effective fluid seal under a wide range of operating conditions.

Abstract: An engine piston compression ring designed to reduce the negative effects of ring end butting and reduce blowby. The compression ring has a gap forming an angle with a longitudinal axis of the ring or with a radius drawn from the axis. A relieved portion is provided along the upper or inner side of the ring adjacent one end, depending upon the direction of the gap angle. The relieved portion slopes along the upper or inner side toward the one end where the longitudinal thickness of the ring is smallest.

Abstract: A seal assembly for a groove or seal gland in a relatively displaceable machine part for sealing an axial machine part extending therethrough comprises a pair of annular seal elements and a support element disposed between the annular elements and radially extending wall of said groove. The annular seal elements have an axial slot therein and a key portion extending therefrom, shaped to engage the axial slot. The seal elements are arranged in an inverted nesting relationship to provide superior sealing characteristics when biased toward the machine part by said support element.

Abstract: A dual seal assembly for providing a seal between a reciprocating rod and the gland is described. The dual seal includes first and second axially adjacent annular seal elements. The first seal element is constructed of a material having a different hardness than the material forming the second seal element. The first and second seal elements each include a seal edge contacting the rod to provide a respective seal between the first and second seal element and the rod. At least a portion of one of the first seal element and the second seal element engages the gland to form the seal between the rod and the gland. By varying the hardness of the materials forming the seal elements, the first seal element and the second seal element can be configured to provide different functions within the dual seal assembly and can cooperatively provide an effective fluid seal under a wide range of operating conditions.

Abstract: A seal assembly 20 for a groove 12 or seal gland in a relatively displaceable machine part 10 for sealing an axial machine part 18 extending therethrough comprises a pair of annular seal elements 30 and a support element 50 disposed between the annular elements 30 and a radially extending wall 14 of said groove 12. The annular seal elements 30 have an axial slot 32 therein and a key portion 36 extending therefrom, shaped to engage the axial slot 32. The seal elements 30 are arranged in an inverted nesting relationship to provide superior sealing characteristics when biased toward the machine part 18 by said support element 50.