Abstract: A composite gasket includes a central core located between non-metallic outer facing layers. Each non-metallic outer facing layer has an outer core adjacent the central core. The outer cores can be either perforated or non-perforated. A bead is provided on the central core to produce a resilient biasing force that urges the outer facing layers into contact with respective mating surfaces to improve gasket sealing. The central core optionally has an elastomeric coating to improve sealing between the central core and the outer cores to prevent leakage between gasket layers.

Abstract: A system for sealing the intersection between a primary borehole and a branch borehole comprises a primary casing section located in the primary borehole in the region of the branchpoint, and a branch casing section located in the branch borehole and secured to the primary casing section. The primary casing section is tubular and defines a slant surface which intersects a central axis of the primary casing section at an acute angle, so that the primary casing section can be pressed towards the branchpoint by means of a hollow whipstock or other wedge-shaped element.

Abstract: The present invention relates to a leaktight seal with a lip capable of gripping a shaft end and being fitted behind a cap. When the cap is in place covering the shaft end and closing the housing, it presses on a stop flange of seal and pushes the lip outwards so that the rotation of the shaft end causes no wear on the seal. When the cap is removed, the housing remains open but the lip grips the shaft end and restores the leaktight seal. This fitting is of particular use for shaft ends fitted with a key slot used for manually rotating a rotating machine during the inspection phase of servicing, the shaft end being driven during normal use of the machine.

Abstract: A mechanical duty bellows seal is constructed from a number of annular rubber diaphragms of comparatively thick cross-section alternately bonded to a series of outer and inner metal hoops so that the hoops hold the rubber diaphragms in simple shear during flexure of the bellows. The stresses in the rubber in shear are predictable thus allowing the calculation of diaphragm proportions to control stress levels.

Abstract: A combination of bearing isolator, shaft, and housing with a stator member affixed to said housing, said stator member having a cavity member therein, an annular rotor member rotatively connected to and surrounding said shaft, said stator member substantially encompassing said rotor member, an insert filling said cavity in said stator member and in contact with said stator member and said rotor member, said insert having an axial cavity therein with the radial sides of the cavity in contact with radial sides of the rotor member and the stator member.

Abstract: A gasket for fuel cells includes a gasket body composed of a metal or resin sheet and having openings, and a sealing section composed of a liquid rubber vulcanizate. The sealing section is bonded to the gasket body at low pressure. The inner face of each of the openings is covered with the sealing section. The gasket precludes generation of contaminants, such as ions, by the reaction of working fluids with the material constituting the gasket body, allowing high generating efficiency of the fuel cell.

Abstract: An improved bellows assembly (18) is provided for use in, for example, an ion implanter (10). The bellows assembly comprises a first mounting portion (56) located at one end of the bellows assembly for fixedly mounting the bellows assembly to a first vacuum chamber (16); a second mounting portion (54) located at an opposite end of the bellows assembly for slidably mounting the bellows assembly to a second vacuum chamber (15); and a steel bellows (60) located between the first and second mounting portions. The bellows extends generally along a longitudinal axis (64) and is expansible and contractible along this axis. The second mounting portion permits radial slidable movement of the bellows assembly with respect to the second chamber in a first plane substantially perpendicular to this axis.

Abstract: A flange protector for protecting opposing flanges of a pipe joint from corrosion and leakage. The flange protector is comprised of a transparent, flexible, elastomeric band for wrapping around the periphery of the opposing pipe flanges of the pipe joint. The band has metal straps that support a fastener for pulling the ends of the band together tightly around the pipe flanges and lubrication inserts for injecting a lubricant through the transparent band to the surfaces of the flanges. The transparent band is sufficiently clear so as to allow visualization of the amount of the lubricant present at the flanged pipe joint and the presence of any corrosion of the flange surfaces without the removal of the flange protector from the flanged pipe joint.

Abstract: A gasket made of a plastic material for refrigerator chests, including an inner door and an outer door, rigidly connected to each other by a foamed material injected in the hollow space between them for insulating purposes, in which the inner door is profiled along one or more sides with a groove is profiled alone one or more sides with a groove next to an extremity thereof overlaying the outer door, wherein the groove functions as a seat to receive an appropriate fastener for the gasket and the latter is fitted with a bellows-type section made of a soft plastic material capable of providing a closing seal between the inner door and the chest, and a base from which the fastener extends to the inner door, the gasket base being made of a rigid plastic material shaped by co-extrusion with the soft plastic material of the bellows-type portion and presents a substantially horizontal, flat or slightly curved configuration in the portion where the base overlays the extremity of the inner door, while presenting a sub

Abstract: Two axially spaced seal rings are located within annular grooves of a retainer to provide a seal for use between a cylindrical shaft and a housing bore. The resulting seal pack can be positioned at a lubricant passage such that lubricant may pass between the housing and the shaft but not longitudinally along the shaft. The annular retainer is dimensioned for an interference fit with either the housing bore or the shaft, and includes at least one opening located between the annular grooves such that lubricant may pass therethrough. An intermediate portion of the annular retainer provides a lubricant channel such that lubricant can flow circumferentially, avoiding the need to orient the opening in the annular retainer.

Abstract: A thermally conductive medium includes a body with a first melting point and phase-changing material encapsulating a portion of the body, with the phase-changing material having a second melting point. The first melting point is greater than the second melting point, and the phase-changing material is configured to be in a liquid phase at temperatures above the second melting point and a solid phase at temperatures below the same. In the liquid phase, an adhesive force is present between the body and the phase-changing material due to capillary attraction, and the phase-changing material may be wettable to one of the two surfaces.

Abstract: A segmented seal ring and spring system for very low pressure drop zones in steam turbines for minimizing leakage between rotating and stationary components, and preventing damage and wear thereto, including a segmented seal ring, with first springs biased against the seal segments to urge the segments radially inwardly toward a small clearance position of the seal ring with respect to the turbine shaft secondary springs to counter the weight of the segments; with the combination of said springs gently urging the seal segments into the small clearance position while allowing clearance enlargement with small resulting forces on the shaft during periods of misalignment and rubbing.

Abstract: A separating piston for a vibration damping system with a cylinder which is filled partly with damping fluid and partly with pressure gas and with a separating piston which is arranged in the cylinder and divides the pressure gas space from the fluid space in a sealing manner via a seal. The separating piston is guided in the cylinder by a guide, wherein the separating piston is provided with an additional guide between the seal and the end side facing the pressure gas space. A chamber which is open relative to the inner wall of the cylinder is arranged in the area between the seal and the additional guide.

Abstract: A cover for a computer monitor housing having a visual display screen is disclosed. The cover includes a containment member having a top panel and a pair of side panels attached thereto. The containment member is substantially constructed of fabric material and is adapted to receive at least a portion of the computer monitor housing. Coupled to the top panel and the side panels of the containment member is a front panel adapted to overlay the screen of the computer monitor housing. Further, a plurality of appendages are attached to the containment member.

Abstract: The present invention is for producing stably a second pressure ring which both keeps a lubricant-scraping property and prevents the cylinder side from being longitudinally scratched. According to the invention, a second pressure ring made of iron without plating thereon, of which the outer peripheral sliding surface is downwardly divergent and slanted, is provided in which the lower end of the outer peripheral sliding surface is worked upwardly divergently so as to slant in a range of less than 0.15 mm in its axial direction. The junction between the outer peripheral sliding surface and the slanted worked portion is lapped cylindrically for finishing.

Abstract: A tube joint is described which facilitates the connection of tubes having different internal diameters or calibers, simply by exchanging a nut member, an insert bush and a collar member for another nut member, another insert bush and another collar member, respectively, having sizes which are suitable for the tube which is to be connected to the tube joint, and in a state in which the joint body is connected to a fluid pressure apparatus.

Abstract: A nitrated piston ring for the piston of an internal combustion engine. The piston ring has a circumferential indentation in its flank surface facing away from the combustion pressure. This indentation has a depth of a few Am and receives lubrication to prevent plating of aluminum from the aluminum piston on the flank surface of the piston ring.

Abstract: A number of embodiments of piston sealing arrangements for shock absorbers having a hydraulic cylinder in which a piston is slidably supported to define a pair of fluid chambers. The piston is provided with a peripheral groove in which a sealing piston ring is provided. A number of different communicating passage arrangements are formed in the piston ring that communicate the exterior surface of the piston ring which engages the cylinder bore with the interior surface of the piston ring which faces the ring groove so as to balance the pressure therebetween. In each embodiment a seal is provided between the piston ring groove and the piston ring so as to preclude fluid flow from one fluid chamber to the other through the piston ring groove and the communicating passage arrangement.

Abstract: A fluid ring seal system and method for use with a shaft encircled by a fluid medium chamber including a fluid medium. The system includes a fluid medium sealing segment in fluid flow communication with the fluid medium chamber. The fluid medium sealing segment substantially maintains the fluid medium within the chamber and the fluid medium sealing segment. A contaminant sealing segment is in fluid flow communication with the fluid medium sealing segment and with an outer environment. The contaminant sealing segment substantially prevents a contaminant from migrating into the fluid medium sealing segment. A fluid pathway extends between the fluid medium sealing segment and the contaminant sealing segment along an innermost radius defined by each respective sealing segment. Alternatively or additionally, a stator separates the fluid medium sealing segment and the contaminant sealing segment.

Abstract: An engine gasket flattens the surface pressure occurring around holes, prevents the occurrence of impressions in and damage to a cylinder block and a cylinder head, and secures a stable sealing performance. This metal gasket has elastic metal plates and an intermediate metal plate interposed between these elastic metal plates. The elastic metal plates are provided with full beads along the circumferences of the holes so that the ridge portions of the full beads contact the intermediate metal plate. The intermediate plate has, on regions which are between the holes and full beads of the elastic metal plates, half beads extending toward the elastic metal plates. The elastic metal plates are folded back along the circumferences of the holes.