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| Number | Title | Issue Date |
| 8083236 | Staggered seal assembly An improved staggered seal assembly uses a static element and a rotating element to create a seal. The static element surrounds the rotating element and has at least one fin. The rotating element has at least one long fin and a set of shorter fins. A third component... | 12/27/2011 |
| 7971882 | Labyrinth seal A stepped labyrinth seal having a plurality of teeth forming gaps between a stationary honeycomb member, where the cavities formed between adjacent teeth include a plurality of vortex flow generating strips on the wall of the cavity that redirect the leakage flow fr... | 07/05/2011 |
| 7789395 | Bearing protector An isolator device, which may be a bearing seal or a bearing isolator, for use hindering fluid flow between components which are rotating relative to each other about a longitudinal axis, the flow being in one direction parallel to this axis, includes a stator for s... | 09/07/2010 |
| 7445213 | Stepped labyrinth seal A stepped labyrinth seal for a turbomachine, the seal having a stepped portion with a redirecting groove formed thereon to redirect a leakage flow through the gap in substantially a reverse direction and onto a surface of the finger such that the dynamic pressure of... | 11/04/2008 |
| 7419164 | Compliant plate seals for turbomachinery A shaft seal serves to reduce leakage between a rotating shaft and a static shell. The shaft seal includes a plurality of compliant plate members, each having a root and a tip. The compliant plate members are secured to the static shell at their root in facing relat... | 09/02/2008 |
| 7338255 | Turbo-type fluid machine and a stepped seal apparatus to be used therein A turbo-type fluid machine comprises a mouth ring part provided between a shroud of an impeller and a pump casing and having a seal function. The mouth ring part comprises an impeller ring on a side of the shroud of the impeller and a casing ring provided on a side ... | 03/04/2008 |
| 7316069 | Pipe cutting apparatus and method A pipe cutting supplemental apparatus and method prevents thin-walled pipe from collapsing when being cut with a standard pinch roll cutter. The tool may be embodied as a solid cylindrical insert, or a hollow cylindrical sleeve. ... | 01/08/2008 |
| 7186074 | Axial flow stream turbines A drum-type rotor carries an annular row of moving blades having root portions held within a slot in the periphery of the rotor. A turbine casing surrounds the rotor and carries a static blade assembly with an annular row of static blades which, together with the an... | 03/06/2007 |
| 7159873 | Shaft seal The present invention relates to a seal assembly for use in a rotary machine. The seal assembly comprises a first member and a seal carrier mounted to the first member by a mounting member, a second member spaced from the first member and a seal running member posit... | 01/09/2007 |
| 7086649 | Gasket with two concentric lips A gasket, sliding about the axis of rotation of a part to be brought closer to or to be spaced apart from another part with which it provides tightness through a pair of lips provided on a ring. The gasket includes a portion of the ring capable of bending to modify ... | 08/08/2006 |
| 7052017 | Rotary machine with seal The so-called comb-type labyrinth sealing device (S1) is disposed in a gap between a rotor blade (2), i.e. a rotating member, and a labyrinth packing (9), i.e. a stationary member. The sealing device (S1) has a plurality of sealing fins (... | 05/30/2006 |
| 7044471 | Cartridge-type mechanical seal and back plate A cartridge seal is co-axially secured within the circular aperture of a back plate bolted to a pump housing. Annular recesses are provided around inner and outer sides of the back plate, surrounding the circular aperture. The cartridge-type seal includes a stationa... | 05/16/2006 |
| 7025565 | Gas turbine engine component having bypass circuit A gas turbine engine component has an annular flange arm, a backing plate mounted to the flange arm and a bypass circuit formed between the flange arm and the backing plate. The bypass circuit includes one or more channels formed in one of the flange arm or the back... | 04/11/2006 |
| 6935631 | Sheet brush seal A primary technical goal of the present invention is to improve seal performance of a brush seal and to provide flexibility for preventing wear of the brush seal due to friction. The sheet brush seal disk comprises a first halved brush seal disk and a mating second ... | 08/30/2005 |
| 6921079 | Hydraulic seal arrangement A hydraulic seal arrangement 5 between two shafts 1, 2 rotating relatively to each other, particularly in the same sense of rotation, of especially a gas turbine engine, where the radially outer shaft 2 has an annulus 5a extending ... | 07/26/2005 |
| 6860483 | Gas film hydraulic shaft seal The present invention relates to a seal system for use in rotary machines. The seal system includes a first member and a second member forming an annulus, a high pressure region and a low pressure region in the annulus, and a liquid seal intermediate the first and s... | 03/01/2005 |
| 6845986 | Low torque seal assembly A unitized seal assembly for use with roller or ball bearing assemblies is disclosed. The unitized seal assembly includes, among other things, a radially outer ring and a radially inner deflector ring. The outer ring includes a first shield element which defines a f... | 01/25/2005 |
| 6834860 | Liquid seal A non-contacting seal which includes a stationary tooth that radially overlaps a tooth on a rotatable shaft, with the sealing action resulting from controlled clearance both radially between stationary tooth and the shaft, and axially between the stationary tooth an... | 12/28/2004 |
| 6779600 | Labyrinth lock seal for hydrostatically set packer A hydrostatically set packer is disclosed. The actuating piston is locked for run in by a lock sleeve and lock dog arrangement. When the desired depth is reached well pressure is built up to break a rupture disc to allow hydrostatic pressure to act on one side of a ... | 08/24/2004 |
| 6726214 | Wrap-around severe splash seal A wrap-around interlocked labyrinth seal adapted to be mounted upon a rotating shaft, having a rotor and a stator. A flange positioned on the stator completely encircles the rotating shaft. The stator is interlocked by positioning a cover of the stator within a radi... | 04/27/2004 |
| 6682077 | Labyrinth seal for disc turbine A disc turbine has a rotor assembly of spaced apart discs with at least one disc equipped with an annular labyrinth seal whose grooves interdigitate with a corresponding labyrinth seal mounted in the sidewall of the rotor housing. A pattern of aligned thr... | 01/27/2004 |
| 6672592 | Magnetic fluid seal A magnetic fluid seal with an excellent quality for reduction of leak of magnetic fluid. Among the projections of the pole pieces, the projections, that are nearest to the permanent magnet, are placed at positions intruding into the permanent magnet sides... | 01/06/2004 |
| 6568688 | Hydraulic seal arrangement, more particularly on a gas turbine This invention relates to a hydraulic seal arrangement between two, more particularly co-rotating shafts of especially a gas turbine engine, where the radially outer shaft when viewed with reference to the shafts' axis of rotation has an annulus extending... | 05/27/2003 |
| 6530573 | Seal device A system for providing a seal between a housing and a shaft is formed of at least two ring members connected to each other by relative diametrical expansion with reduced or eliminated axial resilient deformation. The ring members may be held together by a... | 03/11/2003 |
| 6471216 | Rotating seal Overall performance in enhanced in gas turbine engines by providing a rotating seal including a rotating member arranged to rotate about an axis and having at least one annular projection extending radially outwardly therefrom, and a stator element having... | 10/29/2002 |
| 6471215 | Labyrinth sealing device having a grease purgeable system A grease purgeable dynamic labyrinth sealing device is disclosed which includes a stator having an annular engagement flange on a radially inner portion thereof and a rotor having an annular engagement flange on a radially outer portion thereof. The stato... | 10/29/2002 |
| 6419233 | Shaft seal assembly An improved shaft seal assembly is disclosed having a stator including a main body and axial and radial projections therefrom. The rotor is radially extended and encompasses the axial and radial projections from said stator. The passageway formed between ... | 07/16/2002 |
| 6394459 | Multi-clearance labyrinth seal design and related process A packing ring seal assembly for use in a steam turbine for minimizing leakage flow between stationary and rotating steam path parts includes a stationary annular seal ring having a plurality of axially spaced, annular sealing teeth extending in a radial ... | 05/28/2002 |
| 6390477 | Rotary shaft bearing isolator seal A bearing isolator seal having a shaft seal assembly that includes a stator housing comprising two components, an interior and an exterior component, the two stator housing components being selectively connectable, and axially positionable (relative to th... | 05/21/2002 |
| 6367807 | Labyrinth seal assembly A labyrinth seal for use in a centrifugal pump. The seal may eliminate rotating surfaces from rubbing directly against groove surfaces during installation thereby eliminating or reducing the scraping of material from rotating surfaces. Therefore, generati... | 04/09/2002 |
| 6336637 | Sever splash seal An interlocked labyrinth seal adapted to be mounted upon a rotating shaft, having a rotor and a stator. The stator completely surrounds the shaft. A flange positioned on the stator completely encircles the rotating shaft. The seal rotor includes alternati... | 01/08/2002 |
| 6311984 | Bearing isolator The improved bearing isolator permits the use of vapor or a combination of a vaporized substance with a carrier to lubricate bearings while containing the vaporized substance in the housing and permitting the carrier, having been stripped of its substance... | 11/06/2001 |
| 6273429 | Labyrinth cartridge seal, and centrifugal compressor applications thereof A labyrinth cartridge seal having a shell and a plurality of sleeves having corresponding portions to prevent axial and radial movement therebetween and particularly a labyrinth cartridge seal for use in a compressor for compression of a gas, such as oxyg... | 08/14/2001 |
| 6189892 | High differential pressure type end rotor seal A high differential pressure type end rotor seal that is applicable to a steam cooled type gas turbine with the aim to reduce steam leakage to a minimum without being affected by deviation of fins due to thermal elongation. An end rotor rotational seal of... | 02/20/2001 |
| 6168163 | Shaft seal for mixers A shaft seal is interposed between a tank and a rotating shaft extending through the tank and having a non-rotatable stator fixed to the tank and a rotor fixed for rotation to the shaft. A multiple labyrinth structure is formed between the rotor and the s... | 01/02/2001 |
| 6164658 | Hydraulic seal A hydraulic seal (15) for providing a seal between two concentric shafts (10,12) of a gas turbine engine comprises a radially outer element (16) that defines an annular oil reservoir (21) and a radially inner element (22) having an annular fin (24) that p... | 12/26/2000 |
| 6164655 | Method and arrangement for sealing off a separating gap, formed between a rotor and a stator, in a non-contacting manner The object of the invention is to provide an improved method for sealing off the separating gap, formed between a rotor and a stator, in a non-contacting manner, with which method the service life of the components involved can be increased. In addition, ... | 12/26/2000 |
| 6131914 | Gas turbine engine bearing compartment seal A seal for coaxial inner and outer spools rotatable about an axis is provided which includes a flange having a catch surface. The flange is attached to the outer spool, and is disposed between the inner and outer spools such that the catch surface is in c... | 10/17/2000 |
| 6131910 | Brush seals and combined labyrinth and brush seals for rotary machines Brush seals are retrofitted into existing turbine labyrinth seal rings to create a fail-safe seal design at locations wherever labyrinth seals are currently used, including interstage shaft seals, rotor end seals, bucket (or blade) tip seals and spill str... | 10/17/2000 |
| 6113105 | Rotary shaft bearing isolator seal for dry comminuted materials A rotary shaft bearing isolator seal where the shaft extends into dry comminuted material providing a stator having a very small tolerance between the rotor on the shaft and the stator containing downwardly sloping circular portions adjacent complimentary... | 09/05/2000 |
