Patents by Inventor Bjoern Schenk
Bjoern Schenk has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7251942Abstract: An auxiliary power unit (APU) includes a compressor, a turbine, a combustor, and a starter-generator unit all integrated within a single containment housing. The turbine has an output shaft on which the compressor is mounted, and the starter-generator unit is coupled to the turbine output shaft without any intervening gears. The rotating components are all rotationally supported within the containment housing using bearings that do not receive a flow of lubricating fluid.Type: GrantFiled: June 29, 2004Date of Patent: August 7, 2007Assignee: Honeywell International Inc.Inventors: Kevin S. Dittmar, David H. Edmonds, Bjoern Schenk, Yogendra Y. Sheoran
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Publication number: 20070071545Abstract: Apparatus and methods for coupling components of dissimilar materials via a Hirth serration coupling, wherein an interfacial layer at a Hirth teeth interface allows radial sliding motion of a first set of Hirth teeth relative to a second set of Hirth teeth. The interfacial layer may be a solid lubricant coating, or a compliant multi-layered metal sheet.Type: ApplicationFiled: August 26, 2005Publication date: March 29, 2007Inventor: Bjoern Schenk
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Publication number: 20060231680Abstract: An integrated power and pressurization management system supplies electrical power and cabin pressurization and cooling air during both airborne and ground operations. The system includes an integral auxiliary power unit (APU) that has a compressor, a motor-generator, and a power turbine all mounted on one shaft. The integral APU can supply compressed air for cabin pressurization and environmental cooling functions, and can generate electrical power for various electrical loads. The system further includes one or more electrically driven compressors.Type: ApplicationFiled: June 23, 2005Publication date: October 19, 2006Applicant: Honeywell International, Inc.Inventors: Jean-Luc Derouineau, Bjoern Schenk, Clarence Lui
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Patent number: 7115319Abstract: A component comprising a silicon-based substrate and a braze-based protective coating disposed on the silicon-based substrate. The braze-based coating comprises a brazed layer, wherein the brazed layer comprises at least one intermetallic compound. A scale layer may be formed on the brazed layer. An environmental barrier coating may be disposed directly on the brazed layer or directly on the scale layer. A thermal barrier coating may be disposed on the environmental barrier coating. Methods for making a Si-based component having a braze-based protective coating are also disclosed.Type: GrantFiled: October 8, 2003Date of Patent: October 3, 2006Assignee: Honeywell International, Inc.Inventors: Derek Raybould, Chien-Wei Li, Thomas E. Strangman, Bjoern Schenk
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Publication number: 20060099358Abstract: A protective coating for a component comprising a ceramic based substrate, and methods for protecting the component, the protective coating adapted for withstanding repeated thermal cycling. The substrate may comprise silicon nitride or silicon carbide, and the protective coating may comprise at least one tantalate of scandium, yttrium, or a rare earth element. The protective coating may further comprise one or more metal oxides. The coating protects the substrate from combustion gases in the high temperature turbine engine environment. The coating may be multi-layered and exhibits strong bonding to Si-based substrate materials and composites.Type: ApplicationFiled: November 5, 2004Publication date: May 11, 2006Applicant: Honeywell International Inc.Inventors: Derek Raybould, Chien-Wei Li, Bjoern Schenk, Thomas Strangman
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Publication number: 20060024528Abstract: A layered structure includes a substrate comprising a layer of an oxide/oxide ceramic based composite material, a first oxide layer disposed directly on the substrate and formed from a material that has no greater than about 10% porosity and is substantially impermeable by water vapor, and a second oxide layer disposed directly on the first oxide layer and having a greater porosity than the first oxide layer. Either or both the first and second oxide layers of the coating system may be deposited using a plasma spraying process, a slurry deposition process which is followed by a sintering step, or an EB-PVD process.Type: ApplicationFiled: July 30, 2004Publication date: February 2, 2006Inventors: Thomas Strangman, Bjoern Schenk, Paul Yankowich
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Publication number: 20050284150Abstract: An auxiliary power unit (APU) includes a compressor, a turbine, a combustor, and a starter-generator unit all integrated within a single containment housing. The turbine has an output shaft on which the compressor is mounted, and the starter-generator unit is coupled to the turbine output shaft without any intervening gears. The rotating components are all rotationally supported within the containment housing using bearings that do not receive a flow of lubricating fluid.Type: ApplicationFiled: June 29, 2004Publication date: December 29, 2005Inventors: Kevin Dittmar, David Edmonds, Bjoern Schenk, Yogendra Sheoran
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Patent number: 6977233Abstract: Sintered silicon nitride products comprising predominantly ?-silicon nitride grains in combination with from about 0.1 to 30 mole % silicon carbide, and grain boundary secondary phases of scandium oxide and scandium disilicate. Such products have high fracture toughness, resistance to recession, and resistance to oxidation at temperatures of at least 1500° C. Methods for preparing sintered silicon nitride products are also disclosed.Type: GrantFiled: July 15, 2003Date of Patent: December 20, 2005Assignee: Honeywell International, Inc.Inventors: Chien-Wei Li, Bjoern Schenk, James V. Guiheen
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Publication number: 20050112381Abstract: A protective barrier coating system including a diffusion barrier coating and an oxidation barrier coating and method for use in protecting silicon-based ceramic turbine engine components. A complete barrier coating system includes a thermal barrier coating of stabilized zirconia and an environmental barrier coating of an alloyed tantalum oxide. The oxidation barrier coating includes a layer of metallic silicates formed on a substrate of silicon nitride or silicon carbide to be protected. The oxidation barrier coating can include silicates of scandium, ytterbia or yttrium. The oxidation barrier coating may also include an inner layer of Si2ON2 between the diffusion barrier and the metallic silicate layer. The oxidation barrier coating can be applied to the substrate by spraying, slurry dipping and sintering, by a sol-gel process followed by sintering, by plasma spray, or by electron beam-physical vapor deposition.Type: ApplicationFiled: November 21, 2003Publication date: May 26, 2005Applicant: Honeywell International Inc.Inventors: Derek Raybould, Chien-Wei Li, Bjoern Schenk, Thomas Strangman, Paul Chipko, Lee Poandl
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Patent number: 6881027Abstract: The complex mechanical gear trains and lubrication systems of conventional engine configurations are eliminated by using combinations of hydrodynamic air foil bearings, hydrodynamic solid geometry carbon seals/bearings, magnetic bearings, and electrical starter/generators that can also act as bearings to support the high speed shafts of gas turbine engines. The various bearing types and the starter/generators are arranged in such a way as to share peak loads experienced by the engine shaft during maximum aircraft maneuvers. This results in a minimal bearing and engine size.Type: GrantFiled: July 30, 2003Date of Patent: April 19, 2005Assignee: Honeywell International, Inc.Inventors: Reinhard M. Klaass, Donald I. Takeuchi, Bjoern Schenk
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Publication number: 20050079343Abstract: A component comprising a silicon-based substrate and a braze-based protective coating disposed on the silicon-based substrate. The braze-based coating comprises a brazed layer, wherein the brazed layer comprises at least one intermetallic compound. A scale layer may be formed on the brazed layer. An environmental barrier coating may be disposed directly on the brazed layer or directly on the scale layer. A thermal barrier coating may be disposed on the environmental barrier coating. Methods for making a Si-based component having a braze-based protective coating are also disclosed.Type: ApplicationFiled: October 8, 2003Publication date: April 14, 2005Applicant: Honeywell International Inc.Inventors: Derek Raybould, Chien-Wei Li, Thomas Strangman, Bjoern Schenk
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Publication number: 20050042461Abstract: A component comprising a silicon-based substrate and a diffusion barrier coating disposed on the silicon-based substrate. The diffusion barrier coating comprises an isolation layer disposed directly on the silicon-based substrate and at least one oxygen barrier layer disposed on the isolation layer. The oxygen barrier layer prevents the diffusion of oxygen therethrough, and prevents excessive oxidation of the silicon-based substrate. The isolation layer(s) prevent contaminants and impurities from reacting with the oxygen barrier layer. An environmental barrier coating may be disposed on the diffusion barrier coating, and a thermal barrier coating may be disposed on the environmental barrier coating. Methods for making a component having a diffusion barrier coating are also disclosed.Type: ApplicationFiled: August 18, 2003Publication date: February 24, 2005Applicant: Honeywell International Inc.Inventors: Chien-Wei Li, Derek Raybould, Thomas Strangman, Bjoern Schenk
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Publication number: 20050013993Abstract: An environmentally and thermally protected component comprising a silicon-based ceramic or composite substrate and an environmental and thermal barrier coating disposed on the substrate. The environmental and thermal barrier coating comprises at least about 50 mole % AlTaO4. The composition of the environmental and thermal barrier coating may be adapted to provide excellent CTE (coefficient of thermal expansion) match with a substrate, such as a SiC-based ceramic or composite. Coating compositions of the invention have a stable crystalline structure at a temperature up to at least about 1550° C. Methods for preparing an environmentally and thermally protected component are also disclosed.Type: ApplicationFiled: July 16, 2003Publication date: January 20, 2005Applicant: Honeywell International Inc.Inventors: Chien-Wei Li, Derek Raybould, Bjoern Schenk, Thomas Strangman
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Publication number: 20050014629Abstract: Sintered silicon nitride products comprising predominantly ?-silicon nitride grains in combination with from about 0.1 to 30 mole % silicon carbide, and grain boundary secondary phases of scandium oxide and scandium disilicate. Such products have high fracture toughness, resistance to recession, and resistance to oxidation at temperatures of at least 1500° C. Methods for preparing sintered silicon nitride products are also disclosed.Type: ApplicationFiled: July 15, 2003Publication date: January 20, 2005Applicant: Honeywell International Inc.Inventors: Chien-Wei Li, Bjoern Schenk, James Guiheen
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Publication number: 20040161333Abstract: The complex mechanical gear trains and lubrication systems of conventional engine configurations are eliminated by using combinations of hydrodynamic air foil bearings, hydrodynamic solid geometry carbon seals/bearings, magnetic bearings, and electrical starter/generators that can also act as bearings to support the high speed shafts of gas turbine engines. The various bearing types and the starter/generators are arranged in such a way as to share peak loads experienced by the engine shaft during maximum aircraft maneuvers. This results in a minimal bearing and engine size.Type: ApplicationFiled: July 30, 2003Publication date: August 19, 2004Applicant: Honeywell International Inc.Inventors: Reinhard M. Klaass, Donald I. Takeuchi, Bjoern Schenk
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Patent number: 6736401Abstract: A ceramic finger seal for use between a housing and a combustor liner to inhibit air passage therebetween and for use in fluid sealing between a rotating shaft and a housing circumscribing the rotating shaft. The ceramic finger seal has at least two annular diaphragm members constructed of two or more diaphragm segments bonded end to end by ceramic cement or other high temperature joining compounds. The diaphragm members may be partitioned into a generally continuous inner diameter portion and a segmented outer diameter portion or the reverse thereof. The segmented portion includes finger elements spaced uniformly apart forming gaps therebetween and extend radially outward or inward terminating in a foot portion. The rolled edge on the finger is formed by laser cutting to prevent gouging of the combustor liner surface.Type: GrantFiled: December 19, 2001Date of Patent: May 18, 2004Assignee: Honeywell International, Inc.Inventors: Vincent Chung, Arun Kumar, Bjoern Schenk, Adrian R. Allan
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Patent number: 6672786Abstract: A joint assembly for coupling a ceramic member to a metal member is comprised of a ceramic shaft portion attached to the ceramic member; a slotted shrink fitter formed of a first metal and disposed around and in torque transmitting contact with the ceramic shaft portion to define a first interface surface therebetween; and a sleeve formed of a second metal disposed around and in torque transmitting contact with the shrink fitter to define a second interface surface therebetween. Either the shrink fitter or the sleeve attached to the metal member. The coefficient of thermal expansion of the second metal is relatively low compared to that of the first metal and the diameters of the first interface, (d1), and the second interface, (d2), are determined from the equation, d1/d2=(&agr;c−&agr;1)/(&agr;2−&agr;1) where &agr;c, &agr;1 and &agr;2 are the coefficients of thermal expansion of the ceramic, the first metal and the second metal respectively.Type: GrantFiled: June 4, 2002Date of Patent: January 6, 2004Assignee: Honeywell International Inc.Inventor: Bjoern Schenk
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Publication number: 20030111797Abstract: A ceramic finger seal for use between a housing and a combustor liner to inhibit air passage therebetween and for use in fluid sealing between a rotating shaft and a housing circumscribing the rotating shaft. The ceramic finger seal has at least two annular diaphragm members constructed of two or more diaphragm segments bonded end to end by ceramic cement or other high temperature joining compounds. The diaphragm members may be partitioned into a generally continuous inner diameter portion and a segmented outer diameter portion or the reverse thereof. The segmented portion includes finger elements spaced uniformly apart forming gaps therebetween and extend radially outward or inward terminating in a foot portion. A keyhole is formed at the terminus end of the gaps to minimize crack initiation of the finger elements.Type: ApplicationFiled: December 19, 2001Publication date: June 19, 2003Applicant: Honeywell International, Inc.Inventors: Vincent Chung, Arun Kumar, Bjoern Schenk, Adrian R. Allan
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Publication number: 20020150419Abstract: A joint assembly for coupling a ceramic member to a metal member is comprised of a ceramic shaft portion attached to the ceramic member; a slotted shrink fitter formed of a first metal and disposed around and in torque transmitting contact with the ceramic shaft portion to define a first interface surface therebetween; and a sleeve formed of a second metal disposed around and in torque transmitting contact with the shrink fitter to define a second interface surface therebetween. Either the shrink fitter or the sleeve attached to the metal member. The coefficient of thermal expansion of the second metal is relatively low compared to that of the first metal and the diameters of the first interface, (d1), and the second interface, (d2), are determined from the equation, d1/d2=(&agr;c−&agr;1)/(&agr;2−&agr;1) where &agr;c, &agr;1 and &agr;2 are the coefficients of thermal expansion of the ceramic, the first metal and the second metal respectively.Type: ApplicationFiled: June 4, 2002Publication date: October 17, 2002Inventor: Bjoern Schenk
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Patent number: 6431781Abstract: A joint assembly for coupling a ceramic member to a metal member is comprised of a ceramic shaft portion attached to the ceramic member; a slotted shrink fitter formed of a first metal and disposed around and in torque transmitting contact with the ceramic shaft portion to define a first interface surface therebetween; and a sleeve formed of a second metal disposed around and in torque transmitting contact with the shrink fitter to define a second interface surface therebetween. Either the shrink fitter or the sleeve attached to the metal member. The coefficient of thermal expansion of the second metal is relatively low compared to that of the first metal and the diameters of the first interface, (d1), and the second interface, (d2), are determined from the equation, d1/2=(&agr;c−&agr;1)/(&agr;−&agr;1) where &agr;c, &agr;1 and &agr;2 are the coefficients of thermal expansion of the ceramic, the first metal and the second metal respectively.Type: GrantFiled: June 15, 2000Date of Patent: August 13, 2002Assignee: Honeywell International, Inc.Inventor: Bjoern Schenk