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| Number | Title | Issue Date |
| 8033549 | Mechanical seal A rotating assembly of a mechanical seal includes a retainer, a pair of compression rings, a shaft sleeve, a first rotating seal ring and a second rotating seal ring. The retainer includes a plurality of spring members and a plurality of slide legs longitudinally ex... | 10/11/2011 |
| 7726658 | Driven seal assembly for rotary drive shaft of motor A driven seal assembly is provided for a shaft rotated by a motor disposed in a motor housing and having a seal housing adjacent to the motor housing through which the shaft extends. A first rotary seal is frictionally fit on the shaft adjacent the first stationary ... | 06/01/2010 |
| 7334799 | Sealing device for a turbocharger A sealing device has a seal ring and a cylindrical bellows portion connected to the seal ring. The cylindrical bellows portion has a corrugated outer surface. A turbocharger utilizing the sealing device has a turbine wheel connected to a shaft and a compressor wheel... | 02/26/2008 |
| 7320468 | Sealing arrangement A sealing arrangement for sealing a leakage gap between relatively moveable parts in a flow path between a region of high fluid pressure and a region of low fluid pressure comprises a sealing member having an upstream surface, a downstream surface, a radially outer ... | 01/22/2008 |
| 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 |
| 7290669 | Upflow bioreactor having a septum and an auger and drive assembly An upflow bioreactor includes a vessel having an inlet and an outlet configured for upflow operation. A septum is positioned within the vessel and defines a lower chamber and an upper chamber. The septum includes an aperture that provides fluid communication between... | 11/06/2007 |
| 7219898 | Spring supported dual element face seal with a run surface sleeve The invention provides a seal for a rotatable shaft. The seal includes an inner case mountable to the shaft and having a body and first and second flanges extending radially outward from the body. The seal includes first and second sealing discs operable to seal aga... | 05/22/2007 |
| 7210687 | Shaft seal assembly A primary technical goal of this shaft seal device is to decrease the pressure of a sealant at a communication passage between a fluid chamber and a first seal portion, to further reduce the pressure by a floating ring, to make the first seal portion pressure-proof ... | 05/01/2007 |
| 7178806 | Cinchpac self-loading rotary shaft seal A seal for a conveyor drive which has an elastomer which is compressed between a cap ring and a housing. ... | 02/20/2007 |
| 7048046 | High temperature mechanical seal Preferred embodiments of the present invention provide a submersible pumping system for pumping wellbore fluids. The submersible pumping system includes a rotatable shaft and a mechanical seal that substantially surrounds the shaft. The mechanical seal prevents the ... | 05/23/2006 |
| 7040627 | Cinchpac self-loading rotary shaft seal A seal assembly which is secured to a rotating shaft and which seals around the shaft. The seal assembly has molded grooves adjacent to the shaft which grasp the shaft and prevent leakage. ... | 05/09/2006 |
| 6994351 | Mechanical seal device and method for a scraped surface heat exchanger A sealing method and apparatus is provided for sealing between a rotating shaft and a fixed housing such as found in scraped surface heat exchangers. The sealing apparatus and method includes a sealed cartridge where a gland and a trapped seal ring can be releaseabl... | 02/07/2006 |
| 6948316 | Rankine cycle system A Rankine cycle system having a working medium circulation circuit (110) that includes an evaporator (112), an expander (113), a condenser (114), and a feed pump (115) is provided in which a mixture of oil for lubricating the expan... | 09/27/2005 |
| 6641140 | Apparatus for retaining lubrication oil at sliding surface of shaft seal device disposed within oil chamber of submersible pump An apparatus for retaining lubrication oil at the sliding surface of a double-type shaft seal device disposed within an oil chamber of a submersible pump. The apparatus prevents lubrication oil from scattering from the center portion of the oil chamber of... | 11/04/2003 |
| 6632075 | Sealing and cooling device The invention concerns a sealing- and cooling system for a submersible machine, such as a pump or a mixer. The device comprises an easily replaceable (4) containing mechanical face seals with an intermediate room for a barrier liquid where a circulation p... | 10/14/2003 |
| 6589022 | Compressor having a seal cooling structure in which all refrigerant fluid supplied to the compressor is used to cool compressor shaft seals The compressor has a cooling structure to effectively cool a shaft seal device interposed between a housing of the compressor and a rotary shaft. The front housing has a through-hole through which the rotary shaft extends, and the shaft seal device is arr... | 07/08/2003 |
| 6504888 | Apparatus and methods of flow measurement for a boiling water reactor internal pump A reactor pressure vessel (RPV) for a nuclear reactor that permits measurement of the flow through each reactor internal pump (RIP) is described. The reactor pressure vessel also includes at least one reactor internal pump that includes an impeller and a ... | 01/07/2003 |
| 6446975 | Seal arrangement The invention concerns a seal device for a submersible machine, such as a pump or a mixer. The seal device is designed as an easily replaceable unit comprising two mechanical face seals (4,6) and (5,7) resp. with an intermediate room for a barrier liquid ... | 09/10/2002 |
| 6305692 | Seal device A seal device for a submersible machine, such as a pump or a mixer, the seal device being designed as an easily replaceable unit having two mechanical face seals parted by a room for a barrier liquid in which a pump impeller is located. The impeller circu... | 10/23/2001 |
| 5865441 | Emission seal The shaft seal assembly of cartridge designed for sealing shafts entering or exiting enclosed vessels. The enclosed vessels may have a pressure different from the atmospheric pressure and the seal will normally prevent leakage from or into the vessel. The... | 02/02/1999 |
| 5755444 | Lipped sealing ring having wax packed in helical grooves to facilitate testing upon installation A lipped sealing ring for a mechanical component that moves relatively to it. The lip is of a polymeric material, is flexible, and is forced subject to resilient compression against the component in the vicinity of a sealing gap. A helical shoulder extend... | 05/26/1998 |
| 5562406 | Seal assembly for fluid pumps and method for detecting leaks in fluid pumps or fluid containment devices The seal assembly comprises a housing, a shaft, seals, and a reservoir. The housing has a hollow section bounded by a cylindrical surface and a first curved protrusion. The housing has a first channel and a second channel extending from the hollow section... | 10/08/1996 |
| 5498007 | Double gas barrier seal A mechanical seal assembly having a deep groove pattern formed in the face of the rotating seal ring, which groove pattern includes two sets of straight angled deep grooves, the sets being angled in opposite rotational directions to provide pumping of bar... | 03/12/1996 |
| 5409241 | Positive drive compensating shaft seal A compensating positive drive rotary shaft seal assembly comprises a two-part housing, each housing part including a radially directed stator surface surrounding the shaft. A collar is keyed to the shaft between the stators, and an axially shiftable rotor... | 04/25/1995 |
| 5409240 | Seal with self-lubricating contact surface A seal between a housing and a rotatable shaft is provided, comprising a first ring member generally concentric with a rotatable shaft, the first ring member being attachable to the shaft in a non-rotatable position relative to the shaft, the first ring m... | 04/25/1995 |
| 5375853 | Secondary containment seal A double, back to back oriented mechanical end face seal for use in sealing toxic or corrosive fluids having an intermediate buffer fluid chamber into which a relatively inert gas, such as nitrogen, is provided for use as a buffer fluid. The nitrogen gas ... | 12/27/1994 |
| 5238253 | Regenerative turbine flow inducer for double or tandem mechanical seals A regenerative turbine flow inducer for moving lubricating fluid through a seal chamber of a bearing assembly for lubricating sealing surfaces includes a turbine impeller rotated by the shaft and a pair of liners which enclose the impeller, the liners def... | 08/24/1993 |
| 5217234 | Mechanical seal with barrier fluid circulation system An improved mechanical seal is provided, wherein an annular inner flange extending from a gland plate having inlet and outlet openings is provided with a series of notches between the inlet and the outlet openings, the notches running in the direction of ... | 06/08/1993 |
| 5211532 | Apparatus for applying a back pressure to a pump drive shaft seal An arrangement for applying a back pressure to a shaft seal of a mechanism such as a pump comprises a piston slidable in a cylinder one end of which communicates with the fluid being pumped and the other end of which contains oil communicating with a seal... | 05/18/1993 |
| 5180297 | Fluid transfer pump with shaft seal structure An improved sealing apparatus for gear transfer pump of the type that includes a gear driven by a drive shaft connected to a drive source. The drive shaft extends through a backhead which includes a seal system for inhibiting fluid leakage between the dri... | 01/19/1993 |
| 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 |
| 5076765 | Shaft seal arrangement of turbocharger A shaft seal arrangement of a turbocharger for an internal combustion engine having a throttle valve disposed upstream of a compressor of the turbocharger. The shaft seal arrangement is comprised of first and second seal rings fitted on a cylindrical thru... | 12/31/1991 |
| 5029685 | Oil sealing structure for a hydraulic device for an automatic transmission Seal rings are set in oil grooves which are situated at both sides of two oil passages communicating two hydraulic actuators which operate oppositely. First and second seal rings oil-tightly seal between the first oil passage and sleeve, while third and f... | 07/09/1991 |
| 5024450 | Seal cartridge assembly A seal cartridge assembly is provided for providing a seal between a non-rotatable housing or casing member and a rotatable shaft and includes a housing comprised of overlapping annular case members. Each case member includes an outer peripheral wall port... | 06/18/1991 |
| 4865333 | Seal protection apparatus The seal protection apparatus is intended to provide protection for a main mechanical seal. It comprises a first seal ring fast on the shaft of a pump and a second seal ring which is connected to the casing of the pump by means of a flexible, annular diap... | 09/12/1989 |
| 4863293 | Sealed bearing assembly A sealed bearing assembly including an inner race, an outer race, and a plurality of balls forming therewith a bearing, a pair of closure members along the sides thereof, and a pair of identical annular seals positioned between the bearing and the closure... | 09/05/1989 |
| 4852890 | Rotary shaft bearing isolator seal A bearing isolator seal having a shaft seal assembly that includes a stator housing having an inner radially extending face with a pair of spaced concentric annular flanges of substantially frusto-conical shape extending from a larger diameter end that is... | 08/01/1989 |
| 4830344 | Canted-coil spring with turn angle and seal A garter-type axially resilient coil spring includes a plurality of coils canted along a centerline thereof with each coil having a trailing portion and a leading portion. The disposition of the trailing portion is defined by a back angle between the trai... | 05/16/1989 |
| 4822056 | Adjustable rotary shaft seal A compensating rotary seal assembly adapted to function as a substitute for a stuffing box. The seal assembly includes end plates which may be variably oriented with respect to each other by threaded bolts extending between the plates. The bolts are adjus... | 04/18/1989 |
| 4817966 | Rotary shaft bearing isolator seal A bearing isolator seal having a shaft seal assembly that includes a stator housing having an inner radially extending face with an annular flange of substantially frusto-conical shape that extends from a larger diameter end that is fixed to the inner rad... | 04/04/1989 |
