Abstract: A lubricant leakage stop is provided on the shaft of a rotary device in the form of an annular groove in the shaft. In one embodiment the annular groove is formed with an annular inner surface at the bottom of the groove and with an annular intermediate surface positioned between two portions of the annular inner surface. The intermediate surface has a larger diameter dimension than the two inner surface portions on the axially opposite sides of the intermediate surface. The intermediate surface also has a smaller diameter dimension than that of the two portions of the shaft outer surface on axially opposite sides of the groove. In a second embodiment, the annular groove is formed with an annular inner surface that tapers from the bottom of the groove outwardly to the outer surface of the shaft on one side of the groove.

Abstract: A radial shaft sealing ring, comprising a sealing member made of plastics, especially PTFE compound material, and including a sealing lip which has a portion in sealing engagement with the surface of a shaft towards the medium side is characterized in that a contact pressure means is provided at the medium side of the sealing lip for applying a force with a radially inwardly directed component to said portion of the sealing lip, keeping it pressed against the surface of the shaft.

Abstract: An improved mechanical seal for a pump includes a seal cartridge slidably received inside an end plate. The cartridge includes an outer cylindrical stator member which is slidably received in the end plate and an inner cylindrical rotor which is rotatable within the stator member. The stator member is prevented from rotation in the end plate. The stator member includes a shoulder which extends outwardly over the end plate and is captured between the end plate and the housing of the pump. A clinching collar is fixed to the rotor member and retains the rotor member of the cartridge to the pump shaft. The clinching collar may pass through the end plate while attached to the rotor member and pump shaft. Lubricating passageways in the end plate allow lubricants to circulate past the seal cartridge bearing surfaces.

Abstract: A valve cover gasket has a perforated central core of metal including protrusions extending from planar sides of the core. Silk screened on each side of the core is a silicone foam rubber layer adapted to replace traditional cork gasket structures used for same purpose. The silicone rubber layers include a foaming agent that causes the material to expand during an oven-curing period. The amount of expansion of the silicone rubber coating is up to three times the thickness of the coating originally applied. As disclosed, the oven cure is for approximately 10 minutes at 300 degrees Fahrenheit. The protrusions prevent the silicone rubber material from being fully compressed; the protrusions are designed not to flatten under normal gasket compression loads. The peaks of the protrusions act as compression loads stops to limit amount of permissible compression of the silicone rubber layers.

Abstract: A reduced area gasket has a sealing ring around the inside perimeter of the gasket. Remaining portions of the gasket are removed or compressed so that the bolt load is focused on the sealing area when the flange is tightened. In this way, the lower bolt loads mandated by plastic piping may be met, and the required sealing may be further obtained.

Abstract: The invention pertains to a cylinder head gasket (1) for sealing a region between the cylinder head and the cylinder block of a combustion engine, comprising at least one sealing plate (2) that features several adjacent combustion chamber passages (3, 4) and a corresponding combustion chamber bead (5) running around the combustion chamber passage (3), wherein there is a stopper (6) that acts as a displacement limiter for the combustion chamber bead, wherein the stopper is interrupted in the region (10) between two combustion chamber passages (3, 4) and extends essentially over the entire area of the sealing plate (2) where there are no openings.

Abstract: A seal assembly seal assembly includes an outer member, an inner member, and a resilient member therebetwen. The resilient member is located between an inner diameter of the outer member and an outer diameter of the inner member. The resilient member includes substantially V-shaped or opposed parabolic members in cross-section which define a cavity therebetween. The cavity formed between the parabolic members is filled with the hydrophobic material to provide a barrier to undesirable moisture, lubricate the interface between the parabolic members and the outer diameter of the inner member, and further minimize ingestion of contaminants.

Abstract: A composite face seal having an annular seal rotor with a metal base portion and a radially extending flange. The flange having first and second axially facing surfaces. A first ceramic ring is mounted to the first surface of the flange by a first braze joint and a second ceramic ring is mounted to the second surface of the flange by a second braze joint. The composite face seal assembly further includes an annular stator having an axially facing surface that sealingly engages an axially facing surface of one of the ceramic rings. Each of the braze joints may comprise a molybdenum ring disposed between two braze rings or, for thicker seal assemblies, molybdenum and nickel rings disposed between braze rings.

Abstract: A method and apparatus for installing seals in an interference fit with a comating sealing surface by initially stretching the seal installed in a groove to reduce its cross-sectional thickness perpendicular to a comating sealing surface. The stretched seal is mated with a comating surface and then relaxed, permitting the seal to return to an unstretched position and to passively assume a preloaded position against the comating sealing surface. The seal may be repeatedly disengaged and reengaged by selectably restretching the seal and then selectably releasing it upon completion of repositioning.

Abstract: Flat gasket for sealing a sealing gap between sealing surfaces of machine components which are pressable against the flat gasket, the flat gasket having a gasket plate formed by several sheet metal layers and provided with at least one elastomeric sealing element in an area serving to seal a sealing gap area in which the component sealing surfaces lead to a locally varying sealing surface pressure at the flat gasket, the sealing element being arranged on a first one of the sheet metal layers and, in the mounted state of the flat gasket, extending through a cutout in a second sheet metal layer forming a first one of the main surfaces of the gasket plate; in order that the sealing element can already be applied by the gasket manufacturer, but, nevertheless, is protected against damage in the course of assembly of the machine components, the gasket is so designed that the sealing element is in the form of a sealing element formed from a material which is applied to the first sheet metal layer and is curable in s

Abstract: A sealing device for sealing the gap between two relatively moving members is provided with a pivot point on its cross-sectional perimeter. As pressure against the seal increases, the seal rotates about the pivot point, resulting in an increased sealing surface area on the seal. Additionally, a recess is provided on the cross sectional perimeter, advantageously offering a more frictionless sealing relationship between the seal and the moving member. Further, a recess is provided on outer portion of the cross sectional perimeter on a surface of the seal that would contact an energizer ring, the recess eliminating a dynamic interface between the energizer ring and the seal.

Abstract: A seal apparatus including an elongated body formed of a resilient expandable material defining an interior chamber and having a longitudinal axis. The elongated body is capable of being rolled up on itself by rolling one of the first and second ends of the elongated body in a direction parallel to the longitudinal axis. At least one stem is attached to the elongated body and is in fluid communication with the interior chamber.

Abstract: A flat conductor made in the form of a tubular conductor is sealed at an end connection using a rigid core of convex external surface. The rigid core is slipped into an end part of the tubular flat conductor. A protective sleeve made of a cold-recoverable material seals the conductor in compression between the core and the sleeve.

Abstract: This invention relates to a hydraulic seal arrangement between two, more particularly co-rotating shafts of especially a gas turbine engine, where the radially outer shaft when viewed with reference to the shafts' axis of rotation has an annulus extending radially outward along its circumference into which the radially inner shaft when viewed with reference to the shafts' axis of rotation projects with a web that extends radially outward across its circumference, and which annulus can through an inlet area be filled siphon-fashion under centrifugal effect with a hydraulic medium at least in the area of the free end of the web when the shaft(s) is (are) rotating. In accordance with the present invention, means are provided for exhausting part of the hydraulic medium, said means branching off from an annulus area that is farthest away from the inlet area.

Abstract: A glass door hinge is provided which is self-centering and clamps a glass door between two opposed clamps. The hinge includes a mount, a pair of clamps, a hinge block, a spindle, and a biasing member for engaging the spindle to return the clamps and the door to a centered position. Each of the clamps is preferably provided with a lipped gasket which isolates the door from the metal hinge components. One of the clamps has a pair of set screws for holding the spindle in position relative to the clamps, and a pair of locking screws for inhibiting movement of the set screws. The set screws and locking screws are concealed from view by being received entirely within the clamp.

Abstract: A rotary seal is provided that operates hydrodynamically in response to relative rotation even when subjected to exposure to a high fluid pressure from either side, and provides low breakout and running torque. A dynamic sealing lip having a wavy geometry provides hydrodynamic lubrication in response to relative rotation when little or no differential pressure is acting across the seal. When differential pressure exists, controlled fluid pressure-induced distortion results in a distorted dynamic sealing lip configuration that is suitable for hydrodynamic lubrication, regardless of which direction the differential pressure acts from.

Abstract: A seal assembly including a low flow cloth ring seal having a cloth assemblage is provided for sealing a tubular cavity disposed between a tubular member and a mating body. The density of the cloth assemblage may be set according to a desired flow rate of gas through the cloth ring seal. In applications where more stiffness and strength is desired, the cloth ring seal may include a shim assemblage surrounded by the cloth assemblage.

Abstract: An improved sealing mechanism for a turbomachine such as a compressor for a gas turbine engine employs an abradable coating with a solid lubricant and metal alloy having a quasicrystalline phase.

Abstract: A brush seal is provided between a first stationary component and a second rotating component. A cooling medium is provided through a plurality of jet nozzles for flow along an upstream surface portion of the brush seal bristles and along the rotating component surface adjoining the tips of the bristles. The cooling medium cools the brush seal bristles to a temperature below the temperature of the working fluid passing through the turbine. The jet nozzles may be arranged in the shroud or in the upstream backing plate of the brush seal to direct the cooling medium toward the juncture of the brush seal and the sealing surface.

Abstract: A sealing system for a gear reducer includes a compound sealing arrangement disposed in a bore of the reducer housing through which a rotating member extends. The sealing arrangement includes an outboard shielding seal and a inboard lip seal disposed adjacent to one another. The shielding seal includes an annular metallic shield and forms a labyrinth with the rotating member. An elastomeric sealing member is bonded to the shield. The inboard seal provides at least two additional points of contact for sealing the rotating member. The arrangement defined multiple barriers to liquid and solid contaminants and seals lubricant within the reducer housing. Similar arrangements may be provided about several rotating members, and about ends of members extending through the reducer housing, such as an output hub.