Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8020875 | Turbine friendly abradable material The invention comprises an abradable material containing up to 30 weight percent of fumed silica having a maximum particle from about 5 nanometers to about 20 nanometers and about 1.5 to about 5 weight percent of an abradable organic microballoon filler within an ab... | 09/20/2011 |
| 7435049 | Sealing device and method for turbomachinery A compliant seal for use between rotating blades and a static shroud surrounding the rotating blades in a steam or gas turbine is disclosed. The seal includes a tip surface, substantially resistant to wear due to rubbing by the tip of the rotating blades, and an ela... | 10/14/2008 |
| 7367122 | Stepped sleeve repair of knife seal bores in driven compressor housing A method is provided for repairing a driven compressor housing including a bore having an inner surface configured to engage a shaft-mounted knife seal. The method includes the steps of removing material from the bore inner surface, press-fitting a sleeve into the b... | 05/06/2008 |
| 7347214 | Rotary shaft sealing mechanism and liquid processing apparatus The present invention provides a rotary shaft sealing mechanism having the seal between the rotary shaft and the seal ring improved, and a liquid processing apparatus including the rotary shaft sealing mechanism. The cleaning processing apparatus 1 com... | 03/25/2008 |
| 7287956 | Removable abradable seal carriers for sealing between rotary and stationary turbine components The turbine includes a diaphragm having a seal carrier mounted in opposition to seal teeth carried by the rotary component. The seal carrier includes a seal face having a coating of abradable material enabling the rotary component to abrade the material from the sea... | 10/30/2007 |
| 7278208 | Method of replacing an abradable portion on the casing on a turbojet fan A simple and low cost method of replacing an abradable portion on the fan casing of a turbojet includes an inside heating belt together with holding sectors therefor are put into place against the abradable portion, each holding sector including an inflatable bladde... | 10/09/2007 |
| 7234918 | Gap control system for turbine engines Embodiments of the invention relate to a system and method for controlling the size of gaps in a turbine engine. In many instances, it is desirable to minimize the size of the gaps between neighboring rotating and stationary components in a turbine engine, such as b... | 06/26/2007 |
| 7216871 | Non-contacting seal for rotating surfaces A non-contacting seal for sealing in high temperature applications includes at least one segment having an inner pad with a hydrodynamic/hydrostatic lift-off geometry enabling the seal to run in a non-contact mode, and at least one finger spring supported on the pad... | 05/15/2007 |
| 7178808 | Layer system for the rotor/stator seal of a turbomachine A layer system for the rotor/stator seal of a turbomachine, in particular of a gas turbine, is applied to a metallic component and can be run in with respect to a further component which can move relative to the metallic component, which, in order to improve the ser... | 02/20/2007 |
| 7128962 | Metallic material that can be worn away by abrasion; parts, casings, and a process for producing said material A material that can be worn away by abrasion, and a method of making the same, includes a substantially oxide free metal alloy based on nickel or cobalt or a ceramic. The material further includes at least one of particles of solid lubricant, closed pores, or surfac... | 10/31/2006 |
| 7052527 | Thermal spray composition and method of deposition for abradable seals A thermal spray composition and method of deposition for abradable seals for use in gas turbine engines, turbochargers and steam turbines. The thermal spray composition comprises a mixture of metal-clad solid lubricant particles and unclad solid lubricants particles... | 05/30/2006 |
| 7032903 | Brush-seal designs for turbines and similar rotary apparatus A seal segment for a turbine is provided having labyrinth teeth and a brush seal disposed along the labyrinth teeth. A plurality of the segments for a seal ring. The segments are separable from each other so that the seal can retract. Each segment has two ends, each... | 04/25/2006 |
| 7029232 | Abradable seals A sealing element for a turbine of a gas turbine engine includes a radially inner surface region provided with an integrally formed seal structure comprising a plurality of radially inwardly projecting walls. The walls may be abradable and may define cells for recei... | 04/18/2006 |
| 7025356 | Air-oil seal An air-oil seal having a runner surface comprising at least one component selected from the group consisting of: polyetheretherketone; polyetherimide; polyphenylene sulfide; and polyetherketoneketone. ... | 04/11/2006 |
| 7001145 | Seal assembly for turbine, bucket/turbine including same, method for sealing interface between rotating and stationary components of a turbine A rotary machine includes a rotatable rotor, buckets radially mounted on and spaced apart about the rotor, a stationary stator/casing disposed about and radially outward from the rotor defining an annular gap between the casing and tips of the buckets, and an abrada... | 02/21/2006 |
| 6969231 | Rotary machine sealing assembly A sealing assembly for disposition in a rotary machine is disposed between a rotary component and a stationary component of the rotary machine. The sealing assembly includes at least one sealing strip affixed by caulking to one of the rotary and stationary component... | 11/29/2005 |
| 6962342 | System for sealing off a gap In fluid machines frequently gaps between movable and stationary structural parts have been sealed off. Frequently so-called labyrinth packings are used, whereby sealing strips brush against the opposite structural part. To this end, a brush layer is configured as a... | 11/08/2005 |
| 6962482 | Turbine shroud segment A shroud segment for being incorporated in a gas turbine engine having a turbine case and a rear turbine case connected with a rear end of the turbine case so as to suppress influence of hot combustion gas on the turbine case and the rear turbine case, is provided w... | 11/08/2005 |
| 6939104 | Turbine blade with sealing element A turbine blade including a head at its peripherally outer end, and on the outside face thereof at least one wiper is formed having a first end portion and a second end portion, with a wiper tip extending between the two end portions. The first portion situated on t... | 09/06/2005 |
| 6925812 | Rotary injector A radially-extending arm is adapted to rotate within a stream of first fluid flowing thereacross. In one embodiment, the arm comprises a plurality of lands located at different radial distances from the axis of rotation, and a port located on each land is operativel... | 08/09/2005 |
| 6916021 | Sealing arrangement The present invention relates to a sealing arrangement which is formed between a rotating assembly (4, 6) and a static assembly (3, 14, 15). In this sealing arrangement, the rotating assembly (4, 6, 16) has at least one cutting element (1... | 07/12/2005 |
| 6913445 | Center located cutter teeth on shrouded turbine blades A tip shroud for use with a bucket of a turbine. The tip shroud may include a seal rail with a middle portion and a cutter tooth mounted about the middle portion of the seal rail. ... | 07/05/2005 |
| 6910619 | Brazing of alumina coated honeycomb and fiber metal Process of brazing an alumina-coated honeycomb and fiber metal material to a substrate, in which a mask material is applied to a portion of the honeycomb and fiber metal prior to deposition of the Al2O3, and the mask material is removed after d... | 06/28/2005 |
| 6899339 | Abradable seal having improved durability An air seal for use in a gas turbine engine provides improved durability, particularly at higher temperatures. The seal includes a seal substrate and an abradable seal layer on the substrate. The abradable seal layer is composed of a densified polyimide foam, prefer... | 05/31/2005 |
| 6890150 | Center-located cutter teeth on shrouded turbine blades A turbine bucket includes an airfoil having a tip shroud, a shank and an entry dovetail; a tip shroud seal projecting radially outwardly from the tip shroud and extending continuously between end edges of the tip shroud in a direction of rotation of the airfoil abou... | 05/10/2005 |
| 6887530 | Thermal spray compositions for abradable seals A thermal spray composition and method of deposition for abradable seals for use in gas turbine engines, turbochargers and steam turbines. The thermal spray composition includes a solid lubricant and a ceramic preferably comprising 5 to 60 wt % total of the composit... | 05/03/2005 |
| 6844392 | Abradable dry powder coatings, methods for making and coating, and coated articles therefrom An abradable dry powder coating (22) composition for coating onto a surface (12) for subsequent curing to form into an abradable coating, including a powder (16) formed of uncured thermoset resin with at least 15 volume percent filler, wherein t... | 01/18/2005 |
| 6843482 | Shaft seals for sealing pulverulent solids An apparatus and method for providing a seal between first and second relatively rotatable parts of machines which operate in an environment comprising dust, grit or other finely divided solid material entrained in air, water or other fluid. The seal includes a roto... | 01/18/2005 |
| 6834859 | Labyrinth grease hub seal The present invention provides a labyrinth sealing assembly for placement between a shaft and a bearing housing comprising an annular stator having a body portion, an axially inner engagement surface, an axially inner extending portion extending from a radially oute... | 12/28/2004 |
| 6827350 | Hybrid honeycomb and brush seal for steam gland A steam gland includes a steam inlet scroll and an extraction scroll axially spaced from one another defining high and low pressure regions. A seal body is disposed between the regions and includes a pair of brush seals axially spaced from one another. Intermediate ... | 12/07/2004 |
| 6786488 | Seal structure, turbine having the same, and leak-preventing seal system for rotating shaft In order to decrease gas leakage and in order to restrict the friction between the brush and the rotating shaft, a seal structure for a rotating shaft comprises a stator section, a rotating shaft, a groove, a brush, a spring member, and a connecting hole induces flu... | 09/07/2004 |
| 6739593 | Device for reducing the sealing gap between a rotating component and a stationary component inside a rotary turbo-engine through which a flow passes axially A device for reducing the sealing gap between a rotating component and a stationary component inside a rotary turbo-engine through which a flow passes axially and in which the rotating component and the stationary component each have a surface portion arranged separ... | 05/25/2004 |
| 6733014 | Brush seal The brush section of a brush seal is protected from damages during installing work. It is constituted such that a brush seal unit has, at the free end of the brush section, at least one ablative plate section formed therewith and has a thin groove at the boundary be... | 05/11/2004 |
| 6533285 | Abradable coating and method of production An improved sealing mechanism for a turbomachine such as a compressor for a gas turbine engine employs an abradable coating with a solid lubricant and metal alloy having a quasicrystalline phase.... | 03/18/2003 |
| 6485025 | Metallic cellular structure An abradable turbine seal having a novel honeycomb cellular structure fabricated from metal foils or sheets showing good manufacturability, optimized brazeability and especially good structural integrity and oxidation resistance after brazing to metal sup... | 11/26/2002 |
| 6478304 | Sealing ring for non-hermetic fluid seals A sealing ring is provided for non-hermetic fluid seals with a restricted passage between sealing elements rotating relative to one another the sealing has a carrier and at least one sealing rib extending radially on the outside or inside around the carri... | 11/12/2002 |
| 6352264 | Abradable seal having improved properties An air seal for use in a gas turbine engine is disclosed. The seal includes a seal substrate, and an abradable layer on the substrate, with the abradable including a thermoset polymer and a thermoplastic polymer. The abradable may also include a filler to... | 03/05/2002 |
| 6334617 | Composite abradable material An abradable material for use at moderate temperatures which is particularly suited for use in the compressor sections of gas turbine engines. Abradable seals of the invention comprise an abradable silicone polymer matrix which contains a dispersion of ha... | 01/01/2002 |
| 6290232 | Rub-tolerant brush seal for turbine rotors and methods of installation A rotor shaft of a steam turbine is provided with a dovetail-shaped groove. A plurality of inserts are received in the groove through an entry slot at a predetermined circumferential location. Each insert has a sealing surface which, when all inserts are ... | 09/18/2001 |
| 6251494 | Honeycomb structure seal for a gas turbine and method of making same A honeycomb structure seal is provided for the casing of a turbine, particularly a gas turbine, having a base plate facing the casing wall as well as a brush-against section facing the tips of the turbine rotor blades. The seal includes a multi-layered co... | 06/26/2001 |
