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| Number | Title | Issue Date |
| 7314218 | Externally mountable spiral adaptor An adaptor that can be used with rotary fluid equipment will protect mechanical seals and/or packing material adjacent a seal cavity (18) of the equipment. The adaptor includes an annular body (30) with a central bore (32) adapted to receive a s... | 01/01/2008 |
| 7278840 | Compliant viscous seal for fluid transfer device A viscous seal for fluid transfer devices that deviates from the conventional wisdom of avoiding contact between the seal and a rotating drive shaft of the fluid transfer device. Instead of avoiding contact, contact between the seal and drive shaft is used to effect... | 10/09/2007 |
| 7201379 | Seal assembly, cartridge, and method A seal assembly and cartridge for sealing a space between a rotating member and a stationary member in which a sleeve extends around the rotating member and with the inner surface of the sleeve being spaced from the outer surface of the rotating member to form a gap... | 04/10/2007 |
| 7172201 | Sealing ring, especially radial shaft seal A sealing ring has a sealing disk having a fastening part and a seal part. The fastening part is connected to a first stationary machine part and the seal part seals a movable machine part and is oriented in an axial direction toward an atmosphere side or a medium s... | 02/06/2007 |
| 7125018 | Low-friction seal A low-friction seal comprising a quasi dimensionally stable sealing ring (44) that is accommodated with radial and axial clearance in a groove (30; 76) of one of two surface, whereby said surfaces are sealed off from each other and can move in a relati... | 10/24/2006 |
| 7121551 | Bushing arrangement for seal cavity protection in rotating fluid equipment An arrangement (120) of members for a throat bushing for rotary fluid equipment includes a first member (122) that is useful for seal cavities that contain conventional packing, and a second bushing member (132) that will be used in conjunction ... | 10/17/2006 |
| 6932350 | Windback labyrinth seal that accommodates a pressure differential for rotating shafts A segmented labyrinth seal (10) having a windback configuration formed around a rotatable shaft for preventing leakage of oil from a bearing housing having a first face (22) and a second face (23). An exterior cylindrical surface (19) and... | 08/23/2005 |
| 6921080 | Shaft sealing ring A sealing ring for a shaft (3), characterized by a sealing lip (1) made of an elastomer material is flexionally dimensioned with a flexional elasticity which is sufficient for pressing a sealing section (10) of the sealing lip (1) against... | 07/26/2005 |
| 6871858 | Shaft sealing apparatus A shaft sealing apparatus is provided which can easily be assembled and arranged to prevent leakage of a dope from an acetylator or the like system. A screw sleeve having a spiral groove provided in the outer side thereof is mounted on rotary shaft adjacent to a loc... | 03/29/2005 |
| 6698762 | Rotary device shaft with oil slinger groove 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 s... | 03/02/2004 |
| 6663367 | Shaft seal structure of vacuum pumps A Roots pump rotates a plurality of rotors by a pair of rotary shafts to draw gas. Each rotary shaft extends through a rear housing member of the Roots pump. An annular shaft seal is fitted around each rotary shaft and is received in a recess formed in th... | 12/16/2003 |
| 6428013 | Reverse seal An improved dual lip radial shaft seal is disclosed. The free end of the dual lip seal extends toward the air side of the seal. Optionally, the dual lip seal has an oil side excluder lip seal, an air side dust excluder lip seal, an elastomeric static seal... | 08/06/2002 |
| 6264447 | Air-cooled shaft seal An air-cooled shaft seal comprises an annular body having an inner surface and an outer surface. One or more helical channels are formed on the inner surface. A plurality of external surfaces such as radial fins are disposed in axially spaced relationship... | 07/24/2001 |
| 6179594 | Air-cooled shaft seal An air-cooled shaft seal comprises an annular body having an inner surface and an outer surface. One or more helical channels are formed on the inner surface. A plurality of external surfaces such as radial fins are disposed in axially spaced relationship... | 01/30/2001 |
| 6149161 | Grooved pumping seal An improved seal for a hydrodynamic bearing which aids in making the bearing less sensitive to changes in load and rotational speed, which is especially useful in hydrodynamic bearing motor in which the bearing is open at both the upper and lower ends. Ad... | 11/21/2000 |
| 6095780 | Device for sealing a rotor shaft and screw-type compressor provided with such a device A device is provided for sealing a rotor shaft supported on a bearing mounted in a housing of an appliance for compressing or expanding a fluid containing, apart from the housing, at least one rotor mounted therein. The sealing device is situated between ... | 08/01/2000 |
| 6053500 | Seal housing The invention concerns a seal housing for a mechanical seal device. The seal device is arranged within a cavity (6) provided with a spiral notch (11) at its mantle surface for feeding particles in the liquid in a direction away from the seal means (7) and... | 04/25/2000 |
| 6017037 | Seal device A labyrinth seal device formed of a rotor and a stator connected together by an annular protrusion located within a recess. The rotor has a slinger located on the housing side of the rotor/stator interface. The stator has a plurality of alternating annula... | 01/25/2000 |
| 5893565 | Anti-leakage device In a machine in which a rotating shaft extends into a housing through a gland, the shaft being rotated in only one direction, the housing containing lubricant, the gland including an opening of substantial length with an annular radially inwardly extendin... | 04/13/1999 |
| 5553868 | Seal cavity throat bushing A new throat bushing for use with rotary fluid equipment (10) having a seal cavity (28) defined by a shaft (14), a shaft housing (13), and a seal (26) engaging the shaft, which includes an annular shaped element (50, 62, 66, 90, 92, 108, 120) for secureme... | 09/10/1996 |
| 5503407 | Windbacks for rotating shafts An annular windback is provided in a housing containing a lubricant sump and a rotating shaft therein. The windback is located at one end of the sump and the shaft extends through the windback. The housing has a seal interacting between the housing and th... | 04/02/1996 |
| 5492342 | Seal A seal for use between a pair of elements (11 and 12) which are capable of relative movement with respect to each other where one element (11) has a substantially circular cross section, said seal comprising a bush (16) configured to be received in close ... | 02/20/1996 |
| 5451066 | System for sealing the bearing of a machine, especially a turbomachine The invention concerns a system for sealing the bearing of a machine, especially a turbomachine, in which a shaft is disposed inside a housing which includes a partition traversed by the shaft and separating an air chamber from an oil chamber, the housing... | 09/19/1995 |
| 5322298 | Shaft seal A shaft seal element (20) for use around a rotatable shaft (10) has an annular sealing surface (22) facing a radially adjacent surface of the shaft or housing. This sealing surface (22) can comprise two outer annular lands (26, 27) with an inner land (28)... | 06/21/1994 |
| 5201529 | Sealing device A sealing device provides sealing between two members adapted for relative concentric motion. The main seal comprises a pair of annual seal members attached respectively to the two members. An auxiliary seal serves to prevent the intrusion of foreign matt... | 04/13/1993 |
| 5183271 | Sealing device and manufacturing method of the same A sealing device dispossed between two members which are relatively rotatable, such as rotation shaft and housing of machinery, includes a first seal ring provided with a resin seal lip being disposed in an axial direction of one of the members to be seal... | 02/02/1993 |
| 5165699 | Liquid full pressurized vessel seal A liquid full pressurized vessel seal is provided to effectively seal around rotating shafts in the walls of vessels that stir, for example, highly viscous materials such as polymers. The seal has a housing with a conventional mechanical seal and a bushin... | 11/24/1992 |
| 5090711 | Seal assemblies for internal mixers A seal assembly for the rotor shafts of internal mixers and the like used in the compounding of rubber and plastic. The assembly (130,170) comprises seal rotor means (130,170) carried by said rotor shaft outside of the mixing chamber of said mixer and hav... | 02/25/1992 |
| 5088742 | Hydraulic seal and method of assembly A radially inwardly extending annular flange (47) is integral with an annular portion (26) of an outer shaft (23). The annular flange (47) forms an oil weir in operation. A radially outwardly extending annular sealing member (56) is mounted on an annular ... | 02/18/1992 |
| 5069278 | Leakage control device A seal enhancement assembly according to the present invention cooperates with the traditional static seals to reduce leakage. Leakage often occurs along the drive shaft which passes through the static seal. This is a particular problem in screw pump lift... | 12/03/1991 |
| 5056800 | Seal assembly for internal mixers A seal assembly for the rotor shafts of internal mixers and the like used in the compounding of rubber and plastic. The assembly (20, 100) comprises seal rotor (21) carried by the rotor shafts (15, 16) outside of the mixing chamber (14) of the mixer (10) ... | 10/15/1991 |
| 5039115 | Seal for a rotating shaft A seal for a rotating shaft is disclosed which seals the shaft as it passes through a stationary partition wall. The seal has a segmented graphite sealing ring extending around the shaft located in an annular recess of a casing attached to the partition w... | 08/13/1991 |
| 5006043 | Floating annular seal with thermal compensation An aircraft fuel pump (1) is provided with a centrifugal impeller (2) and a stationary housing (3). A floating annular seal (4) mates with both the stationary housing and the rotating impeller thus providing sealing on two surfaces. The annular seal (4) c... | 04/09/1991 |
| 4948152 | Shaft seal A seal for the gap between two relatively rotatable machine parts, in which at least one of the two confronting surfaces is provided with at least one helical groove which has a pumping action toward the sealed space, and in which a preliminary seal is si... | 08/14/1990 |
| 4801244 | Device A device in a submersible pump or mixer prevents solid bodies from entering a housing containing a mechanical seal. The device has a helically formed groove so directed, that pollutant material is fed in a direction away from the mechanical seal, and the ... | 01/31/1989 |
| 4709930 | Shaft and sealing ring In the combination of a shaft with a polymeric ring having a sealing surface which flares against a counter surface on the shaft to form a dynamic sealing zone therebetween upon relative rotation of the shaft and ring, both the sealing and counter surface... | 12/01/1987 |
| 4645213 | Non-contact type seal device for turbocharger A non-contact type seal device for a turbocharger in which lubricating oil is prevented from leaking into the compression chamber of the turbocharger over the entire range of rotational speeds thereof. The seal device of the invention includes a retainer ... | 02/24/1987 |
| 4634134 | Mechanical seal A mechanical seal apparatus for use between a wall and a shaft extending through an opening in said wall with relative rotation occurring therebetween. The shaft extends from a first region at a first pressure into the opening in the wall and a second reg... | 01/06/1987 |
| 4545588 | Mechanical face seal for sealing slurry liquid A mechanical seal for sealing a slurry liquid between a casing and a rotary shaft comprises a fixed seat ring; a rotatable slide ring in the casing and abutting against the seat ring to form a sealing face therebetween; a helical spring in the casing and ... | 10/08/1985 |
| 4531746 | Dual labyrinth fluid seal with fluid slinger A fluid seal device (10) has a plurality of non-contacting fluid seals located at the operative interface (16) between a stationary member (18) and a rotatable member (20) for preventing the leakage of a fluid from a fluid chamber (14). The first of the n... | 07/30/1985 |
