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| Number | Title | Issue Date |
| 6913075 | Dendritic fiber material A thermal interface includes nanofibrils. The nanofibrils may be attached to a flat base or membrane, or may be attached to the tip portions of larger diameter fibers. The nanofibrils have a diameter of less than about 1 micron, and may advantageously be formed from... | 07/05/2005 |
| 6845985 | Rotating mechanical seal A rotating mechanical seal with a sliding ring, characterized by the sliding ring (5) being attached by way of an O-ring (6) on a shaft (1) of a compressor and rotating with the shaft (1) and by a non-rotating backing ring (4) bein... | 01/25/2005 |
| 6789634 | Self-lubricating elastomeric seal with polarized graphite O-ring seals for rock bit bearings comprise a body formed from an elastomeric material having a lubricant additive in at least the dynamic seal surface to reduce the coefficient of friction and stick-slip amplitude at O-ring seal surfaces. The lubricant additive com... | 09/14/2004 |
| 6569493 | Method of repairing a paper machine dryer journal moisture barrier This invention relates to a method of repairing a moisture barrier separating a paper machine dryer drum from the dryer journal. Such processes of this type, generally, involve filling the cavity between the dryer drum steam intake pipe and the dryer jour... | 05/27/2003 |
| 6557859 | Injection moldable elastomeric gasket A net-shape molded elastomeric gasket for dissipating heat and providing electro-magnetic interference (EMI) shielding for an electronic device is formed by loading a base elastomeric matrix material with thermally conductive filler and EMI reflective met... | 05/06/2003 |
| 6558782 | Flexible graphite sheet and method of producing the same Flexible graphite article of manufacture made by compressing a mixture of expanded graphite particle and a fluoro-resin including ethylene-tetrafluoroethylene (ETFE) copolymers after additional heat treatment. An article of manufacture of a gasket materia... | 05/06/2003 |
| 6540264 | Quick connector for piping In a quick connector for piping 10 for detachably connecting a male member 12 to a female member 11, an O-ring 15 is interposed between the female member 11 and the male member 12 so as to form a seal therebetween, and the O-ring 15 is subjected to a low-... | 04/01/2003 |
| 6488263 | Valve stem and method of manufacture; improved stem packing A valve stem has a thickness of hardfaced material on its outer diameter in the area contacting the stem packing where the seal is formed which prevents corrosion, erosion and/or scratching of the valve stem, thereby preventing formation of leak paths. A ... | 12/03/2002 |
| 6446979 | Rocket motor joint construction including thermal barrier A thermal barrier for extremely high temperature applications consists of a carbon fiber core and one or more layers of braided carbon fibers surrounding the core. The thermal barrier is preferably a large diameter ring, having a relatively small cross-se... | 09/10/2002 |
| 6412784 | Split face mechanical seal system According to a preferred embodiment, a mechanical face seal assembly comprises four generally ring-shaped members and plural spring devices. The first ring-shaped member is directly fastened (e.g., bolted) to the flanged structural section located at the ... | 07/02/2002 |
| 6406031 | Shaft seal A seal for a rotary shaft extending from a container containing agitated abrasive particulates through a wall of the container. The seal includes a first polymeric member around the shaft and in engagement with the wall of the container with the shaft rot... | 06/18/2002 |
| 6399204 | Flexible multi-layer gasketing product A substantially adhesive-free flexible multi-layer graphite based product comprising a first and second outer graphite layer and a layer intermediate to the first and second outer graphite layers, wherein said first and second outer graphite layers compri... | 06/04/2002 |
| 6325385 | Piston ring A piston ring has a diamond-like carbon film formed in a thickness of 0.5 to 30 micrometers over an under film on the upper and lower surfaces. The under film is directly formed on the surfaces, or formed on a hard surface treatment layer consisting of a ... | 12/04/2001 |
| 6302405 | Anti-extrusion seal A seal assembly formed of a T-seal, a pair of back-up rings abutting each side of the T-seal, and a bearing abutting the side of each of the back-up rings. The T-seal is formed of a elastomer material, the back-up ring is formed of a PTFE (polytetraflouro... | 10/16/2001 |
| 6258457 | Metal-reinforced graphite multilayer sheet A multilayer sheet having high compressive strength, high heat resistance and low permeability relative to fluids, includes layers of graphite foils and metal foils disposed alternating one upon another and parallel, with the graphite foils joined to the ... | 07/10/2001 |
| 6250604 | Valve stem and method of manufacturing, improved stem packing A valve stem has a thickness of hardfaced material on its outer diameter in the area contacting the stem packing where the seal is formed which prevents corrosion, erosion and/or scratching of the valve stem, thereby preventing formation of leak paths. A ... | 06/26/2001 |
| 6247679 | Valve stem and method of manufacture; improved stem packing A valve stem has a thickness of hardfaced material on its outer diameter in the area contacting the stem packing where the seal is formed which prevents corrosion, erosion and/or scratching of the valve stem, thereby preventing formation of leak paths. A ... | 06/19/2001 |
| 6247704 | Gasket with dynamic embossment 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 o... | 06/19/2001 |
| 6241256 | Gasket for heat exchanger and method and apparatus for manufacturing same An apparatus for manufacturing a large-diameter gasket in which a pair of holding presses have press members which selectively bears against an elongate band while a bending press pivots against a portion of the band. The drive press bears against a porti... | 06/05/2001 |
| 6202668 | Valve with fire-resistant seal A valve with fire-resistant seal for use in industrial piping applications. The valve includes a valve body with a valve element therein. The valve is illustrated as a ball valve, but other valve configurations could also be used. A valve stem engages the... | 03/20/2001 |
| 6142481 | Piston ring A piston ring is formed over the entire surface with a gas nitrided layer and a hard film with a thickness of 0.5 to 30 micrometers on the gas nitrided layer at the upper and lower surfaces. The hard film comprises diamond-like carbon in which are dispers... | 11/07/2000 |
| 6139022 | Piston ring A piston ring is formed over the entire surface with a gas nitrided layer and a hard film with a thickness of 0.5 to 10 micrometers on the gas nitrided layer at the outer circumferential surface. The hard film comprises diamond-like carbon in which are di... | 10/31/2000 |
| 6129362 | Spherical annular seal member and method of manufacturing the same A spherical annular seal member which has a cylindrical inner surface defining a through hole in a central portion thereof, an outer surface formed in the shape of a partially convex spherical surface, and an annular end face on a large-diameter side of t... | 10/10/2000 |
| 6113109 | Expanded graphite gasket with beaded stress risers A cylinder head gasket has at least one combustion opening, a central metallic core and an expanded graphite facing layer on each side of the core. A stress rising bead is disposed on at least one of the graphite layers encircling each combustion opening ... | 09/05/2000 |
| 6098753 | System for delivering pressurized lubricant fluids to an interior of a rotating hollow shaft A system for delivering a pressurized lubricant fluid from a stationary source to an interior of a drive shaft of a gas turbine engine which rotates at high speed and operates at high temperatures, includes a pair of axially spaced-apart seals that surrou... | 08/08/2000 |
| 6098988 | Mechanism for forming a seal around the shaft of a liquid pump A mechanism for forming a liquid-tight seal around the rotary shaft of a liquid pump having a stationary ring attached to the casing of the pump and a rotating ring attached to the rotary shaft and contacting the stationary ring. The stationary ring is fo... | 08/08/2000 |
| 6092811 | Hybrid gasket A hybrid gasket includes a core defining an aperture therein, the core having an outer edge portion and an inner edge portion immediately surrounding the aperture. The gasket further includes a chemically resistant material encapsulating the inner edge po... | 07/25/2000 |
| 6045885 | High pressure, high temperature gasket A gasket for high pressure, high temperature apparatus is disclosed which is of a generally frusto-conical shape. The smaller diameter portion of the gasket is made primarily from low friction material and the larger diameter portion of the gasket is made... | 04/04/2000 |
| 5992857 | Composite gasket The composite gasket of the present invention has improved various properties which are different depending on use conditions, while ensuring sealing properties, by combining a seal material which is selected in accordance with the properties of certain s... | 11/30/1999 |
| 5990027 | Flexible graphite composite Flexible graphite sheet having embedded ceramic fibers extending from its surfaces into the sheet to increase the permeability of the sheet to resin. The resin impregnated sheet is formed into a sealing gasket.... | 11/23/1999 |
| 5958571 | Material for a gasket coated with foam rubber In order to improve the sealing property and the resistance to pressure of a gasket coated with foam rubber layers, the foam rubber layers are formed on both surfaces of a metal plate from a rubber which is swollen by the medium to be sealed by the gasket... | 09/28/1999 |
| 5944322 | Combination graphite foil and metal sealing gasket A gasket assembly for interposition between a pair of axially spaced-apart interface surfaces of an internal combustion engine. The assembly includes a metal retainer member having generally planar first and second surfaces with one or more apertures form... | 08/31/1999 |
| 5913522 | Spirally-bound flange seal with separate soft layers A flange seal utilizing a spirally wound steel strip with a V-shaped central portion and a sealing strip between the turns of the steel strip has a pair of layers of soft sealing material on opposite sides of the sealing ring engaging projecting portions ... | 06/22/1999 |
| 5909881 | Composition for sliding member as well as sliding member and spherical annular seal member formed of the composition A spherical annular seal member has a through hole in a central portion thereof and a partially convex spherical surface portion on an outer surface thereof, and is formed by compression molding a mixture consisting essentially of from 40 to 80% by weight... | 06/08/1999 |
| 5895058 | Laminated gasket A gasket (20) is provided for sealing a member with a rough micro-surface to a member with a smooth micro-surface. The gasket (20) has a layer (24) of graphite material and a layer (32) of an elastomeric or fibrous gasket material. An inner surface (28) o... | 04/20/1999 |
| 5882012 | Oil seal ring An oil-submerged sliding member which has a good sealability and wear resistance and low attack to the mating member and which can be used with either a soft or a non-soft mating member. It is made from a resin composition comprising 30-88% by weight of a... | 03/16/1999 |
| 5836589 | Sliding member for use with lightweight metal A sliding member used as a sealing ring for a rotary shaft made of a lightweight aluminum alloy in an automatic transmission instead of a conventional cast iron sealing ring in order to prevent leakage of oil and reduce abrasion of the shaft consists of a... | 11/17/1998 |
| 5795454 | Seal for a sensor element of a gas sensor A seal for a sensor element of a gas sensor for determining the oxygen content in gases including exhaust gases of an internal combustion engine, which seal seals the sensor element in a longitudinal bore of a housing, the seal including a sealing stack w... | 08/18/1998 |
| 5788216 | Valve with perfluoroelastomer packing Valves having a stem packing of alternating layers of perfluoroelastomer and high temperature polymer provide outstanding sealing performance against corrosive fluids and high temperatures.... | 08/04/1998 |
| 5695197 | Seal ring method of sealing and molding composition comprising blend of PTFE copolymer, polyamide and carbon fiber therefor A set for preventing flow of a fluid under pressure between a first surface and a second surface spaced-apart from the first surface. The seal is molded or otherwise formed from a composition comprising a blend of from about 79-87% by weight of a copolyme... | 12/09/1997 |
