Abstract: The diaphragm bellows includes a plurality of diaphragms (1) with outer edges (3) and inner edges (2), wherein diaphragms (1) that follow one another in the direction of the central longitudinal axis (5) of the diaphragm bellows are welded together alternately in the region of their inner edges (2) and in the region of their outer edges (3). A sliding-guidance device of the diaphragm bellows has at least two ring parts (10, 11). The at least two ring parts (10, 11) each extend through at most 180° in the circumferential direction about the longitudinal axis (5) of the diaphragm bellows and each have a guide portion (12) and a holding portion (13) protruding from the guide portion (12) in the direction of the longitudinal axis (5), the holding portion (13) projecting into an intermediate space (6) located between two adjacent diaphragms (1).

Abstract: A ring seal apparatus for high temperature sealing includes a first ring including a pair of radial faces and a second ring including a second pair of radial faces, the second ring adapted to coact with the first ring. The first and second rings together define a pair of coacting mating faces. The mating faces are obliquely angled relative to the radial faces, such that each of the coacting mating faces is adapted to seal an interface of the two rings at an angle relative to their substantially parallel radial faces. The pair of coacting rings is adapted to seal a circumferential gap between a pair of components.

Abstract: An assembly comprises a shaft, and a support structure surrounding the shaft; and a magnetic seal system comprising an annular seal assembly including a ring sealingly mounted to a shaft to rotate therewith and slidingly axially displaceable along the shaft, and an annular seal supported by the ring. An annular magnet assembly is configured to be non-rotatingly supported adjacent to and surrounding the shaft, the annular magnet assembly configured and positioned relative to the ring to exert a sufficient attracting force on the ring to biasingly displace the ring axially along the shaft into sealing contact with the magnet. A cooling fluid feeding conduit, a cooling fluid exhaust conduit distinct from the cooling fluid feeding conduit are provided.

Abstract: A seal and a seal assembly. The seal includes a generally annular casing, an engaging feature coupled to or integral with the casing and configured to be coupled to an accessory that is separate from the casing, and a generally annular sealing element coupled to the casing, the engaging feature, or both. The sealing element is configured to seal with a relatively movable member, wherein the engaging feature is separately-formed from the sealing element.

Abstract: An object is to provide a backup ring manufacturable with an angle of a cut portion set to a standard cut angle even in the case of a product having a small diameter etc. due to dimensional limitation of a device used therewith, and is solved by a sealing device characterized in that a backup ring 1 is disposed in an annular gap 4 formed by disposing a sloped surface 20 on a member surface of one of two members, i.e.

Abstract: A sliding component is characterized in that dimples are provided on one sealing face of a pair of sliding parts that mutually slide relative to each other, where the cavitation formation area on the upstream side of each dimple is positioned closer to the low-pressure fluid side and the positive-pressure generation area on the downstream side is positioned closer to the high-pressure fluid side, and the fluid that has been suctioned in the cavitation formation area of each of the above dimples travels in the dimple and is returned to the high-pressure fluid side from the positive-pressure generation area.

Abstract: Various embodiments include gas turbine seals and methods of forming such seals. In some cases, a turbine includes: a first arc segment adjacent to a second arc segment, each arc segment including an end surface and radially facing surfaces extending from opposite ends of the end surface; a slot located between the end surfaces of the first arc segment and the second arc segment; and a first seal disposed in the slot, the first seal contacting the first arc segment at the end surface and extending over the radially facing surfaces of the first arc segment, the first seal including: a shim contacting the first arc segment; a laminate material over the shim and covering the shim; and a conforming material coupling the laminate material to the shim.

Abstract: A sealant is provided for use on an aircraft or other vehicle. The sealant may be used with a gasket. The sealant is a perimeter seal that comprises a polyurea member. The polyurea member is a self-curing, two-component mix. It may cure to a hardness in the range of about 40 to 100 (Shore A). It may maintain an adequate peel strength to withstand multiple thermal and pressure cycling, and may have a working life, wherein it may be shaped, of less than about eleven minutes.

Abstract: A system for creating a durable seal between adjacent horizontal panels, including those that may be curved or subject to temperate expansion and contraction or mechanical shear. The durable seal incorporates a plurality of ribs, a flexible member between the cover plate and the ribs, and may incorporate a load transfer plate to provide support to the rib from below, and/or foams of differing compressibilities.

Abstract: A sliding component has a plurality of dimples provided independently in a circumferential direction on one sealing face of a pair of sliding components relatively sliding to each other. A cavitation formation region on an upstream side of each dimple is disposed closer to a low-pressure fluid side and a positive pressure generation region on a downstream side of each dimple is disposed closer to a high-pressure fluid side, and an edge on the low-pressure fluid side of the positive pressure generation region is formed into a tapered shape inclined with respect to the rotating direction of the other sealing face toward the high-pressure fluid side from the low-pressure fluid side and is smoothly connected to an edge on the low-pressure fluid side of the cavitation formation region.

Abstract: A piston ring for an internal combustion engine may include a metal base and a protective coating disposed on the base to cover at least part of a surface of the base. The coating may be composed of at least one nitride phase formed from at least one metal element and aluminum, and the coating may have an internal stress of less than 1.2 GPa.

Abstract: A spherical annular seal member 38 is used in an exhaust pipe joint and includes a spherical annular base member 36 defined by a cylindrical inner surface 32, a partially convex spherical surface 33, large- and small-diameter side annular end faces 34 and 35 of the partially convex spherical surface 33, and an outer layer 37 formed integrally on the partially convex spherical surface 33 of the spherical annular base member 36. The spherical annular base member 36 includes a reinforcing member made from a metal wire net 5 and a heat-resistant material containing expanded graphite filling meshes of the metal wire net 5 of this reinforcing member and compressed in such a manner as to be formed integrally with this reinforcing member in mixed form. In the outer layer 37, the reinforcing member, the heat-resistant material, and the solid lubricant are integrated in mixed form.

Abstract: A seal for a gas turbine engine may include a first cartridge, a second cartridge, and a wave spring. The wave spring may be located between the first cartridge and the second cartridge. The first cartridge may contact a first component to form a seal. The second cartridge may contact a second component to form a seal. The first cartridge may contact the second cartridge to form a seal. The wave spring may force the first cartridge to contact the first component, and the wave spring may force the second cartridge to contact the second component.

Abstract: A segmented sealing assembly includes a first sealing segment and a second sealing segment, the first and second sealing segments having opposing mating components that are moved into a contact engagement to form the sealing assembly. The first and second sealing components include a first primary seal component on the first sealing component and a second primary seal component on the second sealing component that form a primary seal when the sealing segments are moved into the contact engagement. The sealing assembly includes compression elements on each of the first and second sealing segments. Compression of the compression elements exerts a force that moves the opposing mating components into the contact engagement. The mating components may be configured as tapered tongues having opposing slopes. A plurality of interlacing sealing beads may be provided on the tongues to provide a secondary seal within a gap between the tongues.

Abstract: A sealing arrangement for a pump shaft, includes a restrictor section (18) arranged along the shaft (16) and separating a high-pressure chamber (12) of the pump from a sealing chamber (20), a seal (22) arranged on the shaft (16) and between the sealing chamber (20) and a low-pressure chamber (30), a restrictor leakage line (34) leading from the sealing chamber (20) to the exterior, and a seal leakage line (42) leading from the low-pressure chamber (30) to the exterior, wherein a section of the seal leakage line (42) runs through the interior of the restrictor leakage line (34).

Abstract: An assembly for use on an aircraft wing having an aircraft skin and a fuel tank, the assembly comprising a metal access door for accessing the fuel tank, a metal retainer ring for engaging the wing and the access door. Fasteners removably couple the access door to the retainer ring. A lip, which may be on the wing surface, is configured to receive a perimeter of the access door when the access door is coupled to the retainer ring. A polyurethane elastomeric gel gasket having a metallic skeleton is configured to lay between the access door and a lip of the metal wing surface. Under compression, the polyurethane will deform and squeeze out the edges and flatten so as to provide metal-to-metal contact between the access door and the lip.

Abstract: A polymer sheet includes a polyurethane core. The polyurethane core has a first major surface and a second major surface opposite the first major surface. The polymer sheet can have at least one functional layer overlying a major surface. The polymer sheet has a thickness tPS. The polyurethane core has a thickness tPC. In embodiments tPC can be at least 0.3 tPS. The polyurethane core can have at least one of the following property: (i) a Scratch Resistance Rating, as further described herein, of not greater than about 10 wt %, (ii) an elongation at break of at least 200%, (iii) a tensile strength at break of at least 0.3 MPa, (iv) a loss of tensile strength of not greater than about 30% when exposed to UV light according to standard SAE J1960 (Rev. August 2003). The polymer sheet can be used for gaskets or bonding tapes.

Abstract: A seal assembly includes a cover. A panel sealing apparatus includes the seal assembly. The apparatus includes a wall defining an orifice and the cover is disposed through the orifice. The cover includes a collar and a flange extending outwardly away from the collar. The cover defines an aperture through the collar and the flange. The assembly also includes a plate overlapping the flange and defining a hole. The collar of the cover is disposed through the hole. The assembly further includes a seal defining a passageway. The cover is disposed through the passageway. The assembly also includes a bushing defining an opening. The collar of the cover is disposed through the opening such that the bushing surrounds the collar. At least one of the plate and the bushing is configured to allow movement of the cover independently of the seal.

Abstract: A dust-resistant structure for a tooling machine is disclosed. The tooling machine includes a front plate including an accommodation member and a shaft supporter disposed inside the accommodation member. The dust-resistant structure comprises a bridging ring, a dust-resistant rubber ring and a dust-resistant sealing cover. The bridging ring is disposed corresponding to the front plate, and includes a ring body, an inside-ring region corresponding to the accommodation member, and at least one pressure release member formed in the ring body and interconnecting with the inside-ring region for releasing pressure. The dust-resistant rubber ring is assembled to the ring body and disposed in the inside-region region with an inner rim contacting the accommodation member to block dust. The dust-resistant sealing cover includes a cover body assembled to and shielding the accommodation member for blocking dust; and an assembling hole formed in the cover body and penetrated by the dynamic module.

Abstract: An even number of magnets (5) are incorporated in a housing (3) while sandwiched by pole pieces (6). A rotating shaft (2) has a boundary which is provided in a hollow portion (3a) of the housing (3) and nearer to an airtight chamber (1) than a pole piece (6) nearest to the airtight chamber (1), and an area of the rotating shaft (2) which is nearer to the airtight chamber (1) than the boundary is formed of a non-magnetic material. In the housing (3), an area located near the airtight chamber (1) from a site which is in contact with a pole piece (6) nearest to the airtight chamber (1) is formed of a magnetic material.