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| Number | Title | Issue Date |
| 7392988 | Rotary seal A rotary seal housing having opposing ends, a first fluid conducting slot at one of the opposing ends, a pair of spaced apart fluid conducting slots at the other opposing end, and sets of apertures connecting the first fluid conducting slot with the pair of fluid co... | 07/01/2008 |
| 7344139 | Hydraulic shaft sealing arrangement for high-temperature applications On a hydraulic shaft sealing arrangement for high-temperature applications, a heat protection ring (21) and an air chamber (22) are arranged before the annulus (8) containing the sealing medium (10) for thermal insulation, while spacers (... | 03/18/2008 |
| 7291947 | Electric rotating machine with bearing seals Hydrogen gas is circulated to cool an electric rotating machine main body, and brush seals are provided to contact a predetermined position on the outer circumferential surface of a rotating shaft. As a result, contact of a sealing oil and the hydrogen gas, contact ... | 11/06/2007 |
| 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 |
| 7278449 | Switch, especially for branching off bulk material flows The invention relates to a switch for branching off bulk material flows, the switch includes a rotary plug (1) which is arranged in a fixed housing having preferably three connection openings. In a first position the plug establishes a connection between a fi... | 10/09/2007 |
| 7222861 | Sealing in a hydraulic turbine unit System for providing sealing between a rotor and a turbine casing in a hydraulic turbomachine includes a sealing ring arranged in a peripheral region of the rotor. The sealing ring forms at least one hydrostatic bearing with respect to at least one of the rotor and ... | 05/29/2007 |
| 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 |
| 7059607 | Positioning apparatus In the present positioning apparatus, a positioning apparatus, comprising: a box body including a process chamber exposed to a decompression environment in the interior of the box body and an opening allowing said process chamber to communicate with an outside; a mo... | 06/13/2006 |
| 6830426 | Gas injection seal system for a centrifugal pump A set of seals is installed on the impeller of a centrifugal pump that allows a low viscosity fluid to be injected into a chamber between the impeller shroud and the casing sidewall. A seal ring, with a number of grooves formed in it is installed on the tip of the i... | 12/14/2004 |
| 6789804 | Dry gas shutdown seal A dry gas seal has a housing with an annularly-shaped channel disposed concentric with the drive shaft, and an inlet to introduce pressurized buffer gas into the housing interior. An annularly-shaped shutdown piston is slidably received in the housing channel for ax... | 09/14/2004 |
| 6708981 | Seal assemblies A seal assembly (22) for sealing a pressurized gaseous product includes, a pair of seals (24,26) spaced axially to provide a chamber (28) therebetween, a gas seal (24) being disposed on the inboard side of the seal assembly (22) be... | 03/23/2004 |
| 6517079 | Gas seal for continuous thermal treatment facilities operated with a protective gas atmosphere An aerodynamic seal for a continuous heat treatment furnace which contains a protective atmosphere, and through which a metal strip moves in a given direction is disclosed. The seal is adjacent a passage through which the strip moves through a wall of the... | 02/11/2003 |
| 6352265 | Seal ring using gas curtain A non contact isolation seal assembly for rotary and linear sealing for use in semiconductor manufacturing automation. The noncontact isolation seal assembly employs a seal having an aperture with a shaft extending through the aperture. A gap region is ma... | 03/05/2002 |
| 6129246 | Rotary feeder for dosing bulk material A rotary feeder for dosing bulk material, includes a casing having an inner chamber and formed with a top inlet, a bottom outlet and spaced-apart bearing covers flanking the inlet and the outlet. A rotor is accommodated in the chamber and is mounted on a ... | 10/10/2000 |
| 6086333 | Process and device for quickly reducing pressure in an installation, in particular a hydrogen-cooled generator A method and device for quick pressure relief in a hydrogen-cooled generator system. The hydrogen-cooled generator system at least includes a first and second housing part and a hydrogen seal that separates the first housing part from the interior of the ... | 07/11/2000 |
| 5855472 | Diving bell submersible seal A submersible seal that operates in a substantially frictionless manner is provided for protecting a motor from liquid intrusion along the shaft. Motors of this type are commonly used, for example, in aerators, pumps, mixers, flow developers, and the like... | 01/05/1999 |
| 5636847 | Dual face seal clean barrier fluid and dynamic pressure control system A seal arrangement for a stuffing box, the stuffing box having an outboard seal an inboard seal exposed to process fluid, and a volume pressurized with barrier fluid in which the inboard seal and the outboard seal are disposed, has a container divided int... | 06/10/1997 |
| 5553867 | Triple cartridge seal having one inboard and two concentric seals for chemical processing pump A chemical processing centrifugal pump is provided with a triple cartridge seal arrangement including a single inboard seal and a pair of concentric seals located rearward (i.e. outboard) of the inboard seal, the concentric seals being closest to the pump... | 09/10/1996 |
| 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 |
| 5427500 | Slurry pump seal system A centrifugal pump assembly comprises a pump housing defining a pump cavity, a drive shaft rotatably mounted to the housing, an impeller rotatably disposed in the housing and operatively coupled to the drive shaft, and a shaft seal disposed between the sh... | 06/27/1995 |
| 5425543 | Seal assembly for rotating shaft A seal assembly for use in precluding leakage of hot combustion products along the shaft of a rotating heat exchanger wheel utilized in a power plant. The seal assembly includes a housing positioned in surrounding relation to the shaft and defining an ann... | 06/20/1995 |
| 5412977 | Turbo machine with an axial dry gas seal In a turbo machine, for example, a turbo compressor, the rotor shaft extends through and is sealed relative a housing via dry gas seals in which a seal clearance is achieved between a rotating, sealing body and a non-rotating sliding body in which the inn... | 05/09/1995 |
| 5392605 | Method of and apparatus for reducing the pressure of a high pressure combustible gas The pressure of a high pressure combustible gas is reduced by applying the gas to an expander having a rotatable shaft that passes through a seal and is coupled to a generator. Gas that leaks through the seal provides a simple seal and is withdrawn for bu... | 02/28/1995 |
| 5372730 | Filtering system for pump shaft seals A filtering system for a pump shaft seal includes a filter for preventing abrasive, fibrous, or other solid materials from entering the region of the stuffing box of the pump in the proximity of the seal. The filter is mounted on the pump shaft between th... | 12/13/1994 |
| 5348456 | Helical dry screw expander with sealing gas to the shaft seal system An improved helical dry screw expander particularly suited for cryogenic service and its use in a cryogenic rectification system. The improved helical dry screw expander is particularly advantageous in a cryogenic waste expansion cycle particularly for ni... | 09/20/1994 |
| 5228700 | Contactless seal A contactless seal for sealing a fixed machine part with respect to a machine part rotating with respect thereto, is comprised of a centrifuge ring arranged on the rotatable part, the centrifuge ring forming an annular gap with a fixed part of the seal. I... | 07/20/1993 |
| 5186277 | Generator sealing oil temperature control method and apparatus utilizing temperature matching A system for providing seal oils to a gland seal that surrounds the shaft of a generator with the temperature differences between the oils minimized, as well maintained at a temperature which is greater than that for a bearing lubrication oil supply syste... | 02/16/1993 |
| 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 |
| 5147015 | Seal oil temperature control method and apparatus A system for providing seal oils to a gland seal that surrounds the shaft of a generator with the temperature differences between the oils minimized. The temperature of one of the seal oils is utilized as a reference for controlling the oil temperature of... | 09/15/1992 |
| 5104284 | Thrust compensating apparatus Thrust compensating apparatus for providing a thrust force to compensate for the thrust forces applied to the shaft of single stage overhung turbo machines by the fluid pressure in the cavity of the turbo machine is disclosed and includes a thrust compens... | 04/14/1992 |
| 5078506 | Bottom entry mixer shaft seal system for process vessels A sealing system for a process vessel of the type having a bottom entry mixer shaft includes a motion seal around an exterior portion of the mixer shaft and a mechanical seal around the mixer shaft at the bottom wall of the vessel. The two seals are inter... | 01/07/1992 |
| 5052694 | Hydrostatic face seal and bearing A hydrostatic seal includes a high pressure cavity in one of two opposed sealing faces between a shaft and housing for supplying a pressurized barrier fluid between the opposed sealing faces, and an arrangement for preventing passage of the barrier fluid ... | 10/01/1991 |
| 4951884 | Power auger machine with bearing shield A bearing shield for a power auger machine having a bearing shield which includes an annular outer shield element attached to a rotating auger and having an annular channel formed in a rearward face thereof, an annular inner shield element attached to a w... | 08/28/1990 |
| 4865075 | Sealing device for air rotary joint In an air rotary joint supplying compressed air from an outside source through a rotating shaft to a pneumatic equipment; a sealing device for the air rotary joint, in which lubricating oil chambers partitioned by air seals are formed on both sides of an ... | 09/12/1989 |
| 4821799 | Grease injection control system A system for sealing around a wireline run into or pulled from wells includes a grease control head with a line wiper mounted on the well head and a grease injection control system. The grease injection control system supplies grease continuously at a con... | 04/18/1989 |
| 4819948 | Submerged shaft seal A submerged rotating shaft mechanism, including a gearbox with a gland connected to it and a shaft projecting from the gearbox through and beyond the gland, has an inner seal adjacent the gearbox, an outer, labyrinth, seal adjacent an outer end of the gla... | 04/11/1989 |
| 4795273 | Propeller shaft bearing arrangement The invention relates to a method for preventing leaks in a propeller shaft bearing arrangement including a plain bearing (2), which is lubricated with oil or water and which supports the propeller shaft (1) extending through an opening in the body (4) of... | 01/03/1989 |
| 4781553 | Screw vacuum pump with lubricated bearings and a plurality of shaft sealing means A screw vacuum pump which includes a casing having a rotor chamber opened at its one end to a suction opening and opened at the other end to a discharge opening; a pair of male and female screw rotors rotatably received in the rotor chamber, each of the s... | 11/01/1988 |
| 4733976 | Propeller shaft bearing arrangement The invention relates to a method for preventing leaks in a propeller shaft bearing arrangement including a plain bearing (2), which is lubricated with oil or water and which supports the propeller shaft (1) extending through an opening in the body (4) of... | 03/29/1988 |
| 4726689 | Linear gas bearing with integral vacuum seal for use in serial process ion implantation equipment A high vacuum ion implantation chamber has a lower wall formed with an opening accommodating a depending sleeve through which a shaft passes supporting a substrate support platform at the top and connectable to external linear and rotary drives at the bot... | 02/23/1988 |
