Abstract: Sealing assemblies are described herein useful for high temperature applications, as well as applications involving aggressive chemical reactants, byproducts and/or reaction environments. The assemblies include an outer ring having an interior surface having two inwardly extending projections defining a seal receiving area, an inner ring having an exterior surface having two outwardly extending projections defining a seal receiving area; and a center sealing ring configured to be positioned within the seal receiving areas of the outer ring and the inner ring. When the sealing assembly is installed in a high temperature application, the elastomeric center sealing ring is enclosed within the outer and the inner rings so as to protect the center sealing ring while allowing for thermal expansion of the center sealing ring. In further embodiments, bonded sealing ring bodies are disclosed as well.

Abstract: Sealing assemblies are described herein useful for high temperature applications, as well as applications involving aggressive chemical reactants, byproducts and/or reaction environments. The assemblies include an outer ring having an interior surface having two inwardly extending projections defining a seal receiving area, an inner ring having an exterior surface having two outwardly extending projections defining a seal receiving area; and a center sealing ring configured to be positioned within the seal receiving areas of the outer ring and the inner ring. When the sealing assembly is installed in a high temperature application, the elastomeric center sealing ring is enclosed within the outer and the inner rings so as to protect the center sealing ring while allowing for thermal expansion of the center sealing ring. In further embodiments, bonded sealing ring bodies are disclosed as well.

Abstract: The present disclosure is directed to a sealing system for a turbine engine including an engine component, the engine component defining an oblique sealing surface defining an annular shape. The oblique sealing surface defines an oblique angle with a centerline of the engine component. The sealing system includes a seal housing and a seal ring. The seal housing is annular and includes a groove that is defined by a first sidewall, a second sidewall, and an end wall connecting the first sidewall and the second sidewall. The seal ring is positioned at least partially within the groove in the seal housing. The seal ring defines a seal contact surface for forming a seal with the oblique sealing surface of the engine component.

Abstract: A seal device including a housing enveloping a piston rod, wherein the housing includes at least one ring groove at a cylindrical inside of the housing that is oriented towards the piston rod, wherein a seal ring configured as an annular disc is inserted into the at least one ring groove, wherein the at least one ring groove includes at least two protrusions at opposite side walls, wherein the at least two protrusions press against the seal ring inserted into the at least one ring groove, wherein the at least two protrusions are arranged opposite to each other in a portion of a groove opening oriented towards the piston rod in the at least one ring groove, and wherein the at least two protrusions are configured to dampen lateral movements of the seal ring.

Abstract: A piston ring includes an annular body having: an inner circumferential surface and an outer circumferential surface; one side surface and the other side surface substantially orthogonal to the inner circumferential surface; and a pair of joint ends. The outer circumferential surface includes an inclined surface and an abutment surface. In a direction connecting the one side surface and the other side surface, a maximum width W1 of the abutment surface at the joint end is 80% to 150% of a maximum width W2 of the abutment surface in a portion other than the joint end. In the body, a two-axis difference (d2?d1) between a diameter d1 in a first axis direction passing through a central position of the joint and a diameter d2 in a second axis direction orthogonal to the first axis direction is greater than ?0.25 mm and less than +0.36 mm.

Abstract: A sealing system including a first component at least partially manufactured from ceramic fiber composite materials, a second component at least partially manufactured from ceramic fiber composite materials, and a sealing element accommodated between the first component and the second component. The sealing element is designed as a sealing strip. It is provided that at least one recess accommodating the sealing element is formed on the first component and/or on the second component, the recess having a cross-sectional profile including an inner section which is concave toward the sealing element, the radius of curvature of the inner section being selected in such a way that it may be formed with the aid of continuous, curved fibers of the ceramic fiber composite material, the fibers being oriented in such a way that they lie essentially in parallel to the cross-sectional plane of the cross-sectional profile.

Abstract: A piston ring for a piston of a piston engine has an external circumferential surface (2), and internal circumferential surface (4), and upper flank (6) pointing in the direction of the piston upper side, and a lower flank (8) pointing in the direction of the piston underside. The lower flank (8) runs obliquely with respect to the upper flank (6), so that axial height (A) of the piston ring is grater at the external circumferential surface (2) than the axial height (B) at the internal circumferential surface (4), and wherein on each side of the thrust of the piston ring at least one recess (10) is provided in the upper flank (6).

Abstract: The present invention relates to seal ring back-up devices suitable for use on glands in sealing systems. In particular, the present invention relates to seal ring back-up devices that have been designed to fit into essentially all types of glands and close extrusion gaps. Some embodiments of the present invention provide a seal ring back-up device having an annular body having an inner diameter, an outer diameter, and a scarf cut; and where the annular body is configured to fit a gland and engage a seal ring.

Abstract: The invention relates to an improved seal that allows for a fastener-less/adhesive-less assembly retention method. In particular, the seal may comprise a plurality of integral retention prongs that allows permanent assembly with a plastic housing via friction. The seal is self-retaining, and thus, does not require a fastener or glue. The seal protects the interior of the enclosure from moisture and contaminants when exposed to a mobile environment. In addition, the seal provides sufficient resistance to deliver a proper sealing force and tactile feel to a user when closing the rugged enclosure, while maintaining its shape.

Abstract: A sealing structure enables easy fitting of an endless backup ring and includes: tank main body having filling chamber body with filling chamber and mouthpiece portion formed in cylindrical shape integrally with filling chamber body; valve body having insertion portion inserted in mouthpiece portion; O-ring provided between mouthpiece portion and insertion portion; and first backup ring endless and disposed on one side of O-ring to restrict movement of O-ring, wherein annular housing groove is formed on inner circumferential surface of mouthpiece portion such as to be recessed outward with respect to radial direction in order to house O-ring and first backup ring, wherein mouthpiece portion is provided with first cylindrical portion integral with filling chamber body and second cylindrical portion attachable/detachable along axial direction to/from first cylindrical portion, and wherein housing groove is divided along axial direction to face outward when second cylindrical portion detaches from first cylindri

Abstract: A sealing device for a hydraulic assembly wherein hydraulic fluid is contained in working chamber (53) formed between body (52) and thrust member (51) of the assembly. The device comprises annular seal (63) with opposed sealing faces which are urged into sealing engagement between body (52) and thrust member (51) which have convergent sealing faces. The device may also have a pressure relief valve (100) tapped into the over-stroke end of chamber (53) to protect seal (63) from over-stroke damage comprising porous body (101) which allows fluid to bleed from chamber (53) and allows seal (63) to pass the tapping point without obstruction.

Abstract: A fluid seal assembly consists of a seal element of compliant material that is retainingly carried by a seal carrier. The seal carrier includes one or more elements of relatively rigid material defining a sealing face with a seal-receiving groove interrupting the sealing face. The seal-receiving groove has groove-defining walls each of which has a proximal end at the sealing face and a distal end. The groove-defining walls serve as seal contact surfaces. The seal contact surfaces are configured such that the seal-receiving groove narrows toward its distal end. The seal-receiving groove has a depth and a breadth suitable for accepting the seal element, with the seal element projecting past the sealing face when compressed to be in contact with the seal contact surfaces.

Abstract: The invention relates to a sealing arrangement with an elastic sealing ring, which is located in sealing fashion between a first and a second component in a continuous groove (3) running around the first component, and is compressed in the groove in installed state, deforming its cross-section. At least one supporting ring (21, 22) is provided, which lies in sealing fashion against the sealing ring, while an opposite, supporting surface (9) lies against a groove flank (6) The supporting ring (21, 22) is positioned by the compressed sealing ring (2) in its position at the gap (13) to be sealed between the first and second components. As a result, extrusion of the sealing ring through the gap provided between the two components to be sealed is prevented.

Abstract: A secondary seal is provided for an internal combustion engine having a piston, cylinder bore, ring seal, secondary seal, and leak path. Forces are applied from the combustion side of the piston through a cylinder gap and a leak path to the secondary seal. The secondary seal, seated on the piston and ring seal, transmits the forces generally axially to the piston and ring seal, thereby controllably limiting the radial force between the ring seal and cylinder bore.

Abstract: A piston assembly having a piston and a piston ring. The ring mates to the piston in a groove on the outer surface of the piston. The ring includes two side walls that connect between inner and outer peripheral walls. The side walls converge outwardly at different angles from the inner peripheral wall to the outer peripheral wall. The angles are different to produce a twist feature of the ring within the piston groove to generate a better seal by the ring. The groove of the piston is generally tapered and has top and bottom walls converging at angles approximately equal to the angles of the side walls of the ring. A method of manufacturing the piston assembly includes forming first and second side walls having first and second angles by outwardly converging from the inner peripheral wall to the outer peripheral wall.

Abstract: A ring groove for a two-piece oil ring of a piston is provided that has ring body equipped with a coil expander, wherein the ring body has an upper outer surface and a lower outer surface, both orthogonal to the axial direction of the piston. The ring groove also has an upper inner surface and a lower inner surface, both orthogonal to the axial direction of the piston; a radially inward-most, bottom surface connecting the upper and lower inner surfaces; and oil drain holes, each having an opening thereof located on the bottom surface. The ring groove has an axial width slightly greater than the width of the two-piece oil ring.

Abstract: A ring groove for a two-piece oil ring of a piston is provided that has ring body equipped with a coil expander, wherein the ring body has an upper outer surface and a lower outer surface, both orthogonal to the axial direction of the piston. The ring groove also has an upper inner surface and a lower inner surface, both orthogonal to the axial direction of the piston; a radially inward-most, bottom surface connecting the upper and lower inner surfaces; and oil drain holes, each having an opening thereof located on the bottom surface. The ring groove has an axial width slightly greater than the width of the two-piece oil ring.

Abstract: A piston is disclosed having both downwardly and upwardly inclined piston ring grooves, the grooves being angled less than approximately ten degrees with respect to a horizontally extending axis. In a preferred embodiment, the grooves are less than approximately three degrees in inclination and in a most preferred embodiment, the inclination is less than approximately one degree. The grooves for the combustion seal are angled upwardly from an outer diameter of the piston to adjust for thermal drooping of the piston rings received within the grooves. The grooves for the oil-control seal are angled downwardly so that oil is scraped downwardly, but the oil control ring hydroplanes over the oil when the piston moves upwardly.