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| Number | Title | Issue Date |
| 7343968 | Washpipe seal assembly A coupling seal assembly is described for directing a pressurized abrasive fluid between a non-rotating conduit member and a rotating second conduit member. The seal assembly includes a first ceramic floating seal member secured to the non-rotating conduit member an... | 03/18/2008 |
| 7293778 | Systems and methods for sealing between stators and rotors A seal is used between a housing and a shaft having an axis. The seal includes a first portion and a second portion engageable with each other and movable relative to each other. The first portion and the second portion are configured to be received in a cavity betw... | 11/13/2007 |
| 7287756 | Film riding shaft seal The invention is a film-riding seal for a pump shaft that is resistant to the deposition of iron oxides such as hematite and goethite on the confronting, spaced apart, seal surfaces. The seal generally comprises a ceramic runner mounted on the pump shaft and an adja... | 10/30/2007 |
| 6969071 | Face seal assembly A face seal assembly including an annular mating ring housing having a proximal end surface with a channel therein, a mating ring insert disposed in the channel, the mating ring insert including a mating ring compressed within a first band to maintain the integrity ... | 11/29/2005 |
| 6869381 | Gearbox device having ceramic-incorporating oil seal units In a gearbox device, a housing is formed with a hole-confining wall portion. A shaft is mounted rotatably in the hole-confining wall portions. An oil seal unit is mounted in the housing to provide a liquid tight seal between the shaft and the hole-confining wall por... | 03/22/2005 |
| 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 |
| 6655695 | Face seal assembly with composite rotor 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 j... | 12/02/2003 |
| 6528168 | Carbon/silicon carbide composite material A carbon/silicon composite material wherein a silicon carbide containing carbon layer which is formed by silicon and boron carbide being penetrated from a surface of a carbon substrate into the inside thereof to allow the silicon and carbon of the carbon ... | 03/04/2003 |
| 6439577 | Rotating seals for cell processing systems The invention provides an improved rotating seal apparatus including a plurality of concentrically spaced annular rotating seals. The invention also provides a rotating seal apparatus including a pressurized annular chamber surrounding an annular rotating... | 08/27/2002 |
| 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 |
| 6105969 | Track joint sealing assembly for sealing a track joint in a track chain A track seal assembly (174) adapted to seal a track joint (172) includes a track link and a ceramic seal member (186). The track seal further includes an elastomeric member (176) positioned between the track link and the ceramic seal member (186). The tra... | 08/22/2000 |
| 6102408 | Track link assembly having a resiliently bonded protectively coated seal member and associated method for maintaining a track link assembly A track link assembly includes a first track link having a passageway defined therethrough. The track link assembly also includes a bushing having an end face, wherein the bushing is positioned within the passageway. The track link assembly further includ... | 08/15/2000 |
| 5952080 | Bearing having micropores, and design method thereof A method for designing bearings, of improved performance, the load-bearing surfaces of which feature micropores about 2 to 10 microns deep and, preferably, aspect ratios on the order of 7 to 20. The hydrodynamic pressure distribution of a suite of bearing... | 09/14/1999 |
| 5934683 | Rotary seal assembly having grooved seal facing A seal assembly for sealing a volatile liquid from escaping past a rotating shaft mounted within a housing, includes a rotating sealing ring having a seal facing keyed to the shaft and a stationary sealing ring having a seal facing mounted to the housing.... | 08/10/1999 |
| 5897118 | Mechanical seal for a compressor and centrifugal compressor comprising the mechanical seal The mechanical seal for a compressor comprises a support member fixed to a rotary shaft for rotating therewith, an annular rotating slide member consisting of hard materials and being fitted to the support member by shrinkage, and a stationary slide membe... | 04/27/1999 |
| 5707065 | Sintered SIC mechanical seals having particular pore volume, shape, and diameter Mechanically strong and reduced friction porous silicon carbide sintered shaped articles, well adapted for the production, e.g., of leaktight mechanical packings and rotating bearing seals, have a total pore volume ranging from 4% to 18% thereof, the pore... | 01/13/1998 |
| 5630571 | Exhaust flow control valve An exhaust flow control valve operable over high temperature ranges, comprising: a cylindrical flow housing having a cylinder axis and defining a flow passage; a valve plate pivotably mounted within the cylindrical flow housing, wherein the valve plate ha... | 05/20/1997 |
| 5368314 | Contactless pressurizing-gas shaft seal A high pressure sealing arrangement of the type in which a rotor sealing ring end face defines a gas pressure with a stator sealing ring end face has a functional gap between a cylindrical portion of the seal housing and the stator sealing ring bridged by... | 11/29/1994 |
| 5243836 | Sealing device for a rotary evaporator A sealing device for a rotary evaporator (1) possesses a two part vapor duct arrangement (6). With that, the component on the evaporator side (6a) is formed to rotate and the component (6b) on the cooler side is formed to be stationary. Both the component... | 09/14/1993 |
| 5234048 | Sealing members for gas preheaters, and sealing structures using such sealing members for gas preheaters A sealing structure for a rotary regeneration-type heat exchanger, the sealing structure being adapted to seal at least one of a gap between an outer peripheral portion of a rotor and a stationary housing and a gap between a side face of the rotor and a r... | 08/10/1993 |
| 5183270 | Composite seal rotor A composite seal rotor is provided for sealing between the rotating components of a gas turbine engine held together by the compressive force of a lockup assembly and a housing circumscribing the rotating components and having carbon face seals mounted th... | 02/02/1993 |
| 5156535 | High speed whirlpool pump A pump for Whirlpool and Spa applications has a series wound universal motor which is directly coupled to a centrifugal impeller for operation in the range of 4000 to 9000 RPM. Variable speed of the pump is easily accomplished with a universal motor by va... | 10/20/1992 |
| 5145011 | Sealing members for use in gas preheater A sealing member for use in a gas preheater is adapted to seal a gap between an outer peripheral portion of a rotor and a housing in the gas preheater or a gap between a side face of the rotor and a radial sealing member. At least a part of said sealing m... | 09/08/1992 |
| 5092612 | Contactless pressurizing-gas shaft seal A high pressure sealing arrangement of the type in which a rotor sealing ring end face defines a gas pressure with a stator sealing ring end face has a functional gap between a cylindrical portion of the seal housing and the stator sealing ring bridged by... | 03/03/1992 |
| 5053093 | Process for producing sliding bodies containing hollow chambers In a process for producing ceramic sliding bodies containing hollow chambers from a green solid parent body and a green film body containing hollow chambers, the green film body and the green solid parent body are laminated together, the organic constitue... | 10/01/1991 |
| 4997192 | Mechanical seal using pore-dispersed material, and pore-dispersed cemented carbide and method for manufacturing same A mechanical seal is, at a sliding surface and at its vicinty, formed of a pore-dispersed cemented carbide, so that the lubricating characteristics can be improved and the strength maintained by strictly stipulating the magnitude, shape, and volumetric ra... | 03/05/1991 |
| 4971337 | Mechanical seal assembly An improved mechanical seal using hard non-weldable seal rings in which the seal ring is supported by a seal ring flange and in which a GRAFOIL gasket is positioned in an annular recess between the seal ring and the flange; the seal ring being held in the... | 11/20/1990 |
| 4911609 | Fluid pump A fluid pump having a pump housing, and an impeller in the housing and coupled to the drive shaft of a drive motor. An improved main seal is provided in the housing to seal the hole through which the drive shaft extends. The seal includes a carbon seal me... | 03/27/1990 |
| 4908081 | Process for producing a sliding body The invention concerns a sliding body for sliding systems in which sliding surfaces of sliding and counter components form a gap in which there is a fluid, whereby the sliding body (1) at least in the area of sliding surfaces (10) is comprised of several ... | 03/13/1990 |
| 4779876 | Drive for banded washer type seal An improved drive for a banded sealing ring or washer in a rotary mechanical seal. The washer, usually a ceramic washer, is provided with an annular band surrounding its outer periphery which includes an outwardly extending flange. The seal includes a sle... | 10/25/1988 |
| 4776598 | Mechanical face seal for a rotating shaft of a fluid pump A mechanical seal for a fluid pump wherein a driven ring is mounted in the pump casing and a seat ring is mounted on the pump vane. The two rings have opposed, radial faces for effecting the mechanical seal. The face on the seat ring is of a smaller width... | 10/11/1988 |
| 4714257 | Annular sliding body for a sliding seal and process for use thereof The invention concerns a sliding body for sliding systems in which sliding surfaces of sliding and counter components form a gap in which there is a fluid, whereby the sliding body (1) at least in the area of sliding surfaces (10) is comprised of several ... | 12/22/1987 |
| 4693481 | Film-riding shaft seal formed from high-purity silicon nitride An improved shaft seal for sealingly and rotatably mounting a torque-transmitting shaft within the pressurized housing of a pump. Generally, the shaft seal comprises a seal ring which is sealingly mounted within the housing, and a runner ring which is sea... | 09/15/1987 |
| 4517726 | Method of producing seal ring A method of producing a seal ring for a floating seal assembly comprising forming a seal ring base from a low carbon steel, the seal ring base having a sealing portion formed thereon, subjecting the sealing portion to shot blasting, plasma spraying a cerm... | 05/21/1985 |
| 4418919 | Mechanical seals with setting block for use with slurry pumps A mechanical seal assembly, especially for use in a slurry pump in which the seal rings are resiliently urged into sealing relation by at least one elastomeric assembly loaded in shear. The preferred embodiment is constructed as a cartridge for installati... | 12/06/1983 |
| 4413831 | Face seal with elastomeric axial thrust member A shaft seal device for inhibiting any fluid flow through between two relatively rotating faces, for example, between a casing or the like stationary member and a rotary shaft or the like rotating member extending through the casing or the like stationary... | 11/08/1983 |
| 4391450 | Shaft seal resistant to electrokinetic corrosion A shaft rotatably mounted within a housing. The shaft extends through a pair of annular seal elements one of which is mounted on the shaft for rotation therewith. The other seal element is associated with the housing and is stationary relative to the shaf... | 07/05/1983 |
| 4373575 | Inboard seal mounting A regenerator assembly for a gas turbine engine has a hot side seal assembly formed in part by a cast metal engine block having a seal recess formed therein that is configured to supportingly receive ceramic support blocks including an inboard face thereo... | 02/15/1983 |
| 4361334 | Compression sealed composite seal seat with cooling passages A stationary seal seat for a package rotary mechanical seal is formed by compression sealing a ceramic ring within a glass coated metal ring. The ceramic provides the seat for a rotating seal member and the metal ring provides the surfaces which receive t... | 11/30/1982 |
| 4335888 | Mechanical seal A mechanical seal wherein a smooth sealing end surface is formed at one end of a rotation seal ring and a stationary seal ring, while a sharp edge-like sealing end portion in slidable contact with the smooth sealing end surface is formed at the other of s... | 06/22/1982 |
