Brush Seal Patents (Class 277/355)
  • Patent number: 7735833
    Abstract: The present invention generally relates to sealing devices used in conjunction with two relatively rotatable members and having a fluid seal there between. Finger seals are utilized to achieve sealing between a rotating member and a stationary member. As such the present invention involves a double padded finger seal with both pads oriented axially in the same direction. The sealing apparatus may optionally utilize a padless third laminate. In other embodiments, the present invention provides variations of the basic double padded finger seal with pad configurations utilizing various arrangements and geometries of the padded area.
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: June 15, 2010
    Assignee: The University of Akron
    Inventors: Minel J. Braun, Hazel Marie, Ian Smith
  • Publication number: 20100133756
    Abstract: A shaft seal for steam turbines is provided. The shaft seal steam barrier is supplied with a slight excess pressure. In order to avoid complex additional devices necessary for liquefying the water vapor once again, a condensation chamber, which is sealed from the surrounding air as well as from the steam barrier chamber with brush seals, is provided between the steam barrier chamber and the surrounding air. The condensation chamber is constructed in such a manner that the heat, developing in the interior thereof, is discharged to the outside.
    Type: Application
    Filed: April 22, 2008
    Publication date: June 3, 2010
    Inventors: Edwin Gobrecht, Achim Hammann, Dirk Knudsen, Karsten Peters, Jan Walkenhorst
  • Publication number: 20100135607
    Abstract: A seal arrangement for sealing a bearing comprising a first component and a second component which are rotatably movable with respect to each other is provided. The seal arrangement includes brush seal having an annular brush body carried by the first component and a bundle of resiliently bendable bristles. The brush seal is adapted to maintain a sealing condition when the first and second component are moved relative to each other in a non-rotational manner. Further, a brush seal and a wind turbine having a brush seal are provided.
    Type: Application
    Filed: September 30, 2009
    Publication date: June 3, 2010
    Inventors: Peter Rogall, Meng Gao, Yuanyuan Qiu
  • Publication number: 20100092279
    Abstract: A reaction water turbine including: a rotor having an axis of rotation and an radially outer surface; a housing surrounding the rotor and having a bearing support proximate to the radially outer surface of the rotor; and a seal mounted to the bearing support on the housing, the seal includes a brush seal extending to and bearing against the radially outer surface of the rotor.
    Type: Application
    Filed: June 25, 2007
    Publication date: April 15, 2010
    Applicant: ANDRITZ TECHNOLOGY AND ASSET MANAGEMENT GMBH
    Inventors: Alain Demers, Anders Wedmark
  • Publication number: 20100068042
    Abstract: A brush seal for a turbo-machine for sealing a gap between a rotating and a stationary component is disclosed. Elastically flexible bristles are arranged in a plurality of rows that are adjacent to each other. A film or a disk is arranged between at least two rows of bristles, the film or the disk extending in the longitudinal direction of said bristles.
    Type: Application
    Filed: August 13, 2007
    Publication date: March 18, 2010
    Inventors: Stefan Brück, Matthias Neef, Erik Sulda, Norbert Sürken
  • Publication number: 20100066024
    Abstract: A brush seal assembly and method for sealing a turbine machine rotary member relative to a stationary member circumscribing the rotary member. The seal assembly includes a first compliant seal component disposed at a radially inward region of the stationary member in rubbing contact with a surface of the rotary member. The seal assembly also includes at least one hard seal element formed integrally with a carrier of the first compliant seal component, located a specified axial distance from the first compliant seal component.
    Type: Application
    Filed: March 24, 2009
    Publication date: March 18, 2010
    Applicant: General Electric Company
    Inventors: Steven Sebastian BURDGICK, Andrew Greif
  • Publication number: 20100054924
    Abstract: A brush seal in which an increase in steady-state wear is prevented and the influence of turbulence is eliminated is provided. The invention includes a brush seal including brush seal bristles formed of a plurality of wires and mounted to a seal box in such a manner that one end thereof is in contact with a downstream cylindrical portion; and a downstream support plate mounted next to the brush seal bristles in a direction in which combustion gas flows, for restricting the motion of the brush seal bristles. The brush seal seals the combustion gas flowing between the seal box and the downstream cylindrical portion. The brush seal includes restraint bristles mounted opposite to the downstream support plate and next to the brush seal bristles in the direction in which the combustion gas flows.
    Type: Application
    Filed: September 4, 2008
    Publication date: March 4, 2010
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Noriyoshi Uyama, Naoki Hagi, Takeaki Oya
  • Publication number: 20100021247
    Abstract: A material transporting system comprises a material transporting apparatus (100) including a material transporting apparatus hopper structure (200, 202), which comprises at least one rotary transporting apparatus; a stationary hub structure (900) constraining and assisting the at least one rotary transporting apparatus; an outlet duct configuration (700) configured to permit material to exit therefrom and comprising at least one diverging portion (702, 702?); an outlet abutment configuration (800) configured to direct material to the outlet duct configuration; an outlet valve assembly from the material transporting system venting the material transporting system; and a moving wall configuration in the material transporting apparatus capable of assisting the material transporting apparatus in transporting material in the material transporting system.
    Type: Application
    Filed: September 23, 2009
    Publication date: January 28, 2010
    Inventors: Derek Leslie Aldred, Jeffrey A. Rader, Timothy W. Saunders
  • Patent number: 7651101
    Abstract: 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 relation. The tips of the compliant plate members define a sealing ring between the static shell and the rotating shaft. An axial flow resistance member is disposed within the compliant plate members and serves as a barrier to axial leakage flow between the compliant plate members.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: January 26, 2010
    Assignee: General Electric Company
    Inventors: Shorya Awtar, Norman Arnold Turnquist
  • Publication number: 20100007091
    Abstract: This invention relates to a method of forming brush seals and to brush seals themselves. Thus a back plate 10, which defines an anchor recess 11, a reservoir recess 12 and a land 13 is laid horizontally A bristle pack 14 is then laid on top of the back plate 10, so that one end 15 overlies a recess 11 and the other, 16, projects beyond the land 13. The bristles are then clamped in position by clamp 21 and epoxy resin is poured into the recess 11 as indicated by the arrows. A mould is introduced over the recess. Once the resin is cured, the mould can be removed and it will be noted that excess epoxy resin has fallen into the recess 12 preventing resin wicking beyond the land 13 and interfering with the performance of the bristles.
    Type: Application
    Filed: July 14, 2009
    Publication date: January 14, 2010
    Inventors: Aaron Bowsher, Matthew Richard Jenkins
  • Patent number: 7644928
    Abstract: A brush seal has a bristle housing formed by a cover element and a support element. A plurality of bristles, which are wound around a core element and secured to the core element by a clamping element are positioned in the bristle housing. At least one of the support element and the cover element of the bristle housing are made of plastic.
    Type: Grant
    Filed: August 17, 2004
    Date of Patent: January 12, 2010
    Assignee: MTU Aero Engines GmbH
    Inventors: Stefan Beichl, Alfons Gail, Thomas Huppertz
  • Publication number: 20100001473
    Abstract: A brush seal including a bristle pack mounted in a holder, and having a free end for sealing with a member, a front plate for lying on a high pressure side of the seal and extending part way along the length of the bristle pack to a free end being spaced from the bristle pack characterised in that the front plate is formed for or carries a formation for reducing the influence of swirling fluid on the high pressure side on the bristle pack.
    Type: Application
    Filed: September 11, 2009
    Publication date: January 7, 2010
    Inventors: Peter Francis Crudgington, Aaron Bowsher
  • Publication number: 20090322028
    Abstract: A seal arrangement (1, 101) for maintaining an axial pressure differential between relative high and low pressure stages along a rotating element (2, 102), the arrangement comprising: i) a plurality of leaf or brush seal members (5) forming a circumferential seal-pack (4, 104) around the rotating element (2, 102), in-between said low and high pressure stages, for limiting leakage of fluid between said low and high pressure stages; ii) a baffle (6, 7, 106, 107) positioned on the upstream or downstream side of the seal-pack (4, 104) for regulating such leakage through the seal pack (4, 104); and iii) a control arrangement for adjusting the position of the baffle (6, 7, 106, 107) hereby to control the regulation of said leakage through the seal-pack (4, 104) and hence control the consequent blow-down effect on the seal-pack (4, 104) caused by that leakage.
    Type: Application
    Filed: March 25, 2009
    Publication date: December 31, 2009
    Applicant: ROLLS-ROYCE PLC
    Inventors: Christopher Wright, Simon D. Granville-George
  • Publication number: 20090322033
    Abstract: A seal assembly is for a compressor including a casing having first and second chambers and a shaft extending through the casing between the two chambers. The seal assembly includes a main body disposed about the shaft and between the two chambers and having a central axis, an inner surface spaced radially outwardly from the shaft to form a seal chamber. Annular sealing members are connected with the main body and extend radially from the body inner surface toward the shaft, the sealing members preventing flow between the first and second chambers through the seal chamber. A separator is coupled with the shaft adjacent to the main body and has separation passages fluidly connecting one of the two chambers with the seal chamber, each passage extending radially with respect to the shaft axis so as to direct liquids and solids contacting the passage inner surface away from the seal chamber.
    Type: Application
    Filed: June 25, 2008
    Publication date: December 31, 2009
    Applicant: Dresser-Rand Company
    Inventors: William C. Maier, David J. Peer
  • Patent number: 7637719
    Abstract: A sealing arrangement, especially for a flow engine, for non-hermetically sealing a gap (12) between a rotor (10) and a stator (11), which comprises a seal having a plurality of sealing elements that are fixed to a sealing element support, said sealing element support being at least partially disposed in a receptacle (16) which is defined by a supporting element (17) and a cover element (18) is disclosed. The sealing element support is configured as a ring that is interrupted once or several times. Free ends (19, 20) of the sealing element support overlap in the area of interruptions in the circumferential direction. The contours of the supporting element (17) and the cover element (18) are adapted to the contours of the sealing element support and the sealing elements (15). At least one end (19, 20) of every part of the sealing element support is associated with an antirotation device (21, 22).
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: December 29, 2009
    Assignee: MTU Aero Engines GmbH
    Inventor: Wilhelm Graebeldinger
  • Publication number: 20090315272
    Abstract: A divided brush seal comprises a base portion to shut off a sealing fluid side area and environment area, a first end portion having a first connecting face at one side divided end of the base portion, a second end portion having a second connecting face at another divided end of the base portion which connects with the first end portion, a seal brush having bristle groups to seal the sealing fluid provided parallel to a supporting face with coupling one end thereof to a fixed portion which connects with the base plate, wherein the first end portion and the second end portion comprise a first bristle groups respectively, a wire diameter of a first bristle of the first bristle groups is thicker with respect to a wire diameter of a second bristle of a second bristle groups provided between the first bristle group of the first end portion and the first bristle group of the second end portion, the first bristle group of the respective divided brush seal and the first bristle group of the other side divided brush
    Type: Application
    Filed: July 4, 2007
    Publication date: December 24, 2009
    Applicant: EAGLE INDUSTRY CO., LTD.
    Inventors: Hidetoshi Kasahara, Toru Kono
  • Patent number: 7628231
    Abstract: An earth-boring bit has a bit body with a depending bearing pin and a cone rotatably mounted thereon. A seal seals between the bearing pin and the cone. An annular set of bristles is located adjacent at least part of the dynamic seal surface of the seal to protect the seal against debris.
    Type: Grant
    Filed: September 21, 2006
    Date of Patent: December 8, 2009
    Assignee: Baker Hughes Incorporated
    Inventor: Chih C. Lin
  • Patent number: 7604241
    Abstract: The seal between high and low pressure regions in a turbine or turbo-machinery includes arcuate segments having a brush seal flanked on one or both sides by a plurality of beams lying adjacent to and in contact with one another. Shims separate the bristles of the brush seal from the rows of beams. The cross sectional dimension of the beams is 20-60 times the diameter of the bristles. The beams terminate short of the rotary component while the bristle tips engage the rotary component. The beams take up most of the pressure difference while the bristles take up the balance of the pressure difference across the seal.
    Type: Grant
    Filed: September 22, 2005
    Date of Patent: October 20, 2009
    Assignee: General Electric Company
    Inventor: Mark William Kowalczyk
  • Patent number: 7604242
    Abstract: A brush seal extends between static and rotary components. The brush seal includes a fence on the high pressure side, a bristle pack behind the fence, a bristle pack backing plate and a pressure plate. The backing plate includes a plurality of circumferentially and radially spaced arcuate slots arrayed in staggered relation about the brush seal segment. The pressure plate includes radially extending grooves opening toward the backing plate and intersecting each of the slots along that radius to afford a substantially uniform distribution of pressure on the downstream side of the bristle backing plate. In another embodiment, the grooves extend along the downstream faces of the bristle backing plate.
    Type: Grant
    Filed: May 9, 2007
    Date of Patent: October 20, 2009
    Assignee: General Electric Company
    Inventors: William Edward Adis, Bernard Arthur Couture
  • Publication number: 20090250879
    Abstract: A brush sealing system includes a plurality of bristles, each having a first end coupled to a holding device and a second end protruding outwards from the holding device. One or more shims are disposed between the first end of each of the bristles and the holding device; wherein the shims are configured to controlling a pinch point diameter of the bristles.
    Type: Application
    Filed: April 4, 2008
    Publication date: October 8, 2009
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Eric John Ruggiero, Roderick Mark Lusted
  • Publication number: 20090224483
    Abstract: A brush seal assembly including a pair of annular plates (11,12) defining an annular slot (14) between them and a radially outer chamber (15) opening into the slot (14); and an annular brush seal (13) having bristles (16) and an enlarged portion (17) at its outer periphery formed by welding the bristles (16) together, the brush seal (13) extending through the slot (14) with its enlarged portion (17) retained in the chamber (15) wherein at least a portion of one of the plates (11, 12) has an extension thereof which is deformed over the other plate (11, 12) to hold the plates (11, 12) together to form the assembly characterised in that one of the plates (12) has a flat face in the region of the slot (14).
    Type: Application
    Filed: October 1, 2007
    Publication date: September 10, 2009
    Inventor: Peter Francis Crudgington
  • Patent number: 7584924
    Abstract: A high-speed vertical take-off and land aircraft includes a body with an engine supported by the body. A fan assembly is also carried by the body. The fan assembly includes a hub and a plurality of blades to provide vertical lift for the aircraft. A nozzle ring is provided on the fan assembly. The nozzle ring includes an annular nozzle array. Hot gases from the engine are fed to the nozzle array by a feed duct. A bearing mechanism supports the fan assembly on the body. The bearing mechanism is carried in a work space. A brush seal assembly thermally isolates the work space from the hot exhaust gases passing through the feed duct to the nozzle array.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: September 8, 2009
    Assignee: Go Aircraft Ltd.
    Inventor: Gordon Y. W. Ow
  • Publication number: 20090218771
    Abstract: A method of manufacturing a brush seal assembly is disclosed. The method includes circumferentially arranging bristles about an axis. A plate is arranged adjacent to the bristles. Unwelded ends of the bristles are aligned with a periphery of the plate to provide a flush surface across the plate and bristles. The unwelded ends are laser welded to the periphery at the flush surface to provide a unitary subassembly.
    Type: Application
    Filed: March 3, 2008
    Publication date: September 3, 2009
    Inventor: Glenn D. Sparks
  • Patent number: 7578509
    Abstract: A seal assembly which, among other applications, may be used for sealing fluid leakage between a steam or combustion (gas) turbine rotor and a turbine stator body. The seal assembly includes elements having a plurality of spaced leaf seal members with slots therebetween. Each leaf seal member is angled out-of-plane between a fixed end and a free end thereof, and the free ends slidably engage the rotatable component. In one embodiment, the fixed ends of each leaf seal member are positioned substantially perpendicular to a longitudinal axis of the rotating component. A support may be provided supporting the free end such that it contacts a distal end of the support in an operative state and is out of contact with the distal end in an inoperative state. Seal members may include two different materials having different coefficients of thermal expansion.
    Type: Grant
    Filed: July 22, 2003
    Date of Patent: August 25, 2009
    Assignee: CMG Tech, LLC
    Inventor: Clayton M. Grondahl
  • Patent number: 7565729
    Abstract: A method of forming brush seal segments includes mounting a pair of full form plates having opposite arcuate edges in back-to-back relation and wrapping wire about the form plates in multiple passes to form wire runs at angles, e.g., 35-45° relative to radii of the arcuate edges. Half form plates are assembled to opposite sides of the full form plates adjacent one edge of the subassembly. The wire wrap adjacent the one edge of the full form plates is removed. Welds are applied between each adjacent half and full form plates. The inner edges of the wrapped wire and inner frame members of the full form plates are removed. The assembly is then separated to form a pair of arcuate brush seal segments.
    Type: Grant
    Filed: March 17, 2006
    Date of Patent: July 28, 2009
    Assignee: General Electric Company
    Inventors: William E. Adis, David Gerard DuHaime, Michael Mack
  • Publication number: 20090179384
    Abstract: A brush seal assembly is disclosed that includes bristles arranged circumferentially about an axis to provide a bristle assembly. First and second plates are secured about the bristle assembly to provide a subassembly. A circumference of the subassembly is pressed into a retaining ring to provide the brush seal assembly. The circumference need not be machined. A perimeter weld is no longer needed to secure the first and second plates and bristle assembly to one another to provide the brush seal assembly.
    Type: Application
    Filed: January 15, 2008
    Publication date: July 16, 2009
    Inventor: Mark E. Addis
  • Publication number: 20090136339
    Abstract: A method for assembling a rotary machine is provided. The method includes providing at least one seal assembly that includes at least one annular seal housing defined by a top wall, a front wall, and a rear wall, that are connected together such that a cavity is defined within the housing, coupling a plurality of flexible plates within the cavity such that the plates are axially-spaced from the front wall and the rear wall within the cavity, coupling at least one side plate to the at least one annular seal housing such that the at least one side plate is moveable with respect the front wall and the rear wall, and coupling the at least one sealing assembly within a rotary machine to facilitate sealing between a rotary component and a stator component.
    Type: Application
    Filed: November 27, 2007
    Publication date: May 28, 2009
    Inventors: Nikhil Kumar Verma, Jason Paul Mortzheim, Yogesh Sathe, Hrishikesh Vishvas Deo
  • Publication number: 20090121087
    Abstract: A high-speed vertical take-off and land aircraft includes a body with an engine supported by the body. A fan assembly is also carried by the body. The fan assembly includes a hub and a plurality of blades to provide vertical lift for the aircraft. A nozzle ring is provided on the fan assembly. The nozzle ring includes an annular nozzle array. Hot gases from the engine are fed to the nozzle array by a feed duct. A bearing mechanism supports the fan assembly on the body. The bearing mechanism is carried in a work space. A brush seal assembly thermally isolates the work space from the hot exhaust gases passing through the feed duct to the nozzle array.
    Type: Application
    Filed: January 31, 2007
    Publication date: May 14, 2009
    Inventor: Gordon Y.W. Ow
  • Patent number: 7523943
    Abstract: A sealing arrangement for sealing a gap between two components which can move rotationally with respect to one another about a common axis of rotation, having a brush seal on a first component which interacts with a sealing surface of the second component. The sealing surface is conical in form, with at least one component being axially displaceable and adjustable with respect to the other component in order to reduce the gap between the brush seal and the second component.
    Type: Grant
    Filed: June 13, 2003
    Date of Patent: April 28, 2009
    Assignee: MTU Aero Engines GmbH
    Inventors: Stefan Beichl, Alexander Rauschmeier
  • Patent number: 7516962
    Abstract: An arrangement is provided for a non-hermetical seal between the stator and the rotor of a gas turbine. The arrangement comprises a brush seal which is arranged in a receiving chamber that is formed by at least one spacer or reinforcing element arranged between preferably two cover or guide elements. The brush seal is hub-centered via sliding elements, especially via sliding pads, said sliding elements being integrated into the spacer or reinforcing element.
    Type: Grant
    Filed: April 17, 2004
    Date of Patent: April 14, 2009
    Assignee: MTU Aero Engines GmbH
    Inventor: Alexander Boeck
  • Publication number: 20090087303
    Abstract: A device operating in an environment includes a fiber optic sensing system having one or more fiber optic sensors disposed in the device and configured to detect one or more parameters related to the device. The parameters may include temperature, strain, pressure, vibration, or combinations thereof.
    Type: Application
    Filed: September 28, 2007
    Publication date: April 2, 2009
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Eric John Ruggiero, Kevin Thomas McCarthy, Christopher Edward Wolfe, Hua Xia, Bala Corattiyil, Kenneth Lee Fisher
  • Publication number: 20090072486
    Abstract: A brush seal for sealing gaps, such as those found in gas turbine engines, includes a plurality of metallic bristles mechanically captured by a support member. The support member includes at least one flexible plate extending at least substantially along the bristle length of the plurality of bristles. The support member is constructed and arranged to support the plurality of metallic bristles during operation.
    Type: Application
    Filed: April 14, 2007
    Publication date: March 19, 2009
    Applicant: Rexnord Industries, LLC
    Inventor: Amitava Datta
  • Publication number: 20090058010
    Abstract: RF signal noise in a powertrain utilizing a power inverter module and electric motor is attenuated by providing a low impedance connection between a transmission output shaft and housing.
    Type: Application
    Filed: August 29, 2007
    Publication date: March 5, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: William T. Ivan, Edward L. Kaiser, Grantland I. Kingman, David J. Trzcinski
  • Publication number: 20090039604
    Abstract: A brush seal for sealing off components movable relative to one another with respect to a pressure difference is disclosed. The brush seal having bristles which are arranged in a bristle housing which consists of two housing halves having free ends of legs which project into the area of the ends of the bristles, which legs carry mutually facing supporting surfaces for the bristles.
    Type: Application
    Filed: October 17, 2008
    Publication date: February 12, 2009
    Applicant: MTU Aero Engines GmbH
    Inventors: Stefan Beichl, Carsten Butz, Christoph Cernay
  • Patent number: 7487588
    Abstract: In a process for producing leaves (20, 20?) for a leaf seal, in particular as a seal for a gas turbine, which leaves (20, 20?) are laterally delimited by a peripheral edge contour and have regions of different thicknesses (d1, d2), a simplification, without sacrificing precision, is achieved by virtue of the edge contour of the leaves (20, 20?) being cut out of a metal sheet (28) by an etching process and the regions of different thicknesses (d1, d2) also being produced simultaneously as part of the etching process.
    Type: Grant
    Filed: October 3, 2006
    Date of Patent: February 10, 2009
    Assignee: ALSTOM Technology Ltd.
    Inventors: Simon Ian Hogg, Nigel Anthony Rhodes, Erwin Schoenfeld
  • Publication number: 20090033037
    Abstract: A seal assembly comprising a first movable stator member movable between a sealing position and a non-sealing position, a second fixed stator member, the first stator member being movable relative to the second stator member, the seal assembly further comprising at least one flexure member coupled to the second stator member, and at least one biasing member coupled between the at least one flexure and the movable stator for biasing the movable stator to a non-sealing position.
    Type: Application
    Filed: July 30, 2007
    Publication date: February 5, 2009
    Inventors: Kripa K. Varanasi, Joseph C. Albers, William L. Herron, Peter Crudgington
  • Publication number: 20090001668
    Abstract: The seal is capable of providing a seal for an air gap between a rotor (18) and a stator. It incorporates a container for the textile insulators (4) fixed on the rotor (18) or the stator. The textile insulators are subjected, on one side, to an upstream pressure and, on another side, to downstream pressure, the upstream pressure being greater than the downstream pressure. The textile insulators (4) are supported on the stator or the rotor (18) so as to be at an angle to the side of the seal where the pressure is lower, namely the downstream pressure.
    Type: Application
    Filed: June 27, 2008
    Publication date: January 1, 2009
    Applicant: SNECMA
    Inventor: Daniel Georges Plona
  • Publication number: 20080315529
    Abstract: A brush seal assembly is formed of a bristle array receiving at least one housing member. Alignment structures are formed on the housing and bristle assembly to ensure that the bristle assembly will be properly positioned in a working environment.
    Type: Application
    Filed: June 19, 2007
    Publication date: December 25, 2008
    Inventor: Mark E. Addis
  • Publication number: 20080309017
    Abstract: A passive brush seal effectively to limit conditioned air such as humidity, temperature or filtered air, or contaminated air such as smoke or fumes from an area of greater pressure to one of lower pressure. The passive brush seal is in the form of a strip brush with polygonal filaments that provide an improved block to the flow of gases. The shape of the filaments is such that they inter-fit or interlock and separate less readily. Important applications are as elevator seals or clean room or computer room seals.
    Type: Application
    Filed: June 18, 2007
    Publication date: December 18, 2008
    Inventor: Douglas A. Mattice
  • Publication number: 20080309019
    Abstract: A sealing assembly is provided. The sealing assembly includes a foil disposed circumferentially around a rotating component and configured to provide primary sealing to the rotating component between high pressure and low pressure sides and a spring system disposed adjacent to the foil. The spring system includes a plurality of features to facilitate foil surface to follow excursions of the rotating component, wherein the plurality of features provide secondary sealing from the high pressure to the low pressure sides between the foil and a stationary component.
    Type: Application
    Filed: June 13, 2007
    Publication date: December 18, 2008
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Christopher Edward Wolfe, Kartik Mangudi Varadarajan, Mohsen Salehi, Bugra Han Ertas, Michael Vincent Drexel, Biao Fang
  • Patent number: 7461847
    Abstract: A self centering, floating brush seal assembly for a machine housing including a seal channel disposed circumferentially about a rotating shaft. The seal channel is typically configured to accommodate a ring seal. The ring seal is removed and a radially floating brush seal is installed in the seal channel but the brush seal is not fixed to the machine housing. The typical brush seal includes a front plate, a back plate, and a plurality of bristles sandwiched between the front plate and the back plate and having free radially extending ends disposed circumferentially about and contacting the rotating shaft. A radially extending rub feature is associated with at least one of the front plate and the back plate. The rub feature is disposed circumferentially about and contacts the rotating shaft.
    Type: Grant
    Filed: December 12, 2005
    Date of Patent: December 9, 2008
    Assignee: Eaton Corporation
    Inventors: John Short, Charles Trabert
  • Publication number: 20080296846
    Abstract: An outside diameter brush seal assembly is disclosed. The brush seal assembly includes a first static component, a second static component, and a brush seal. The first and second static components may be configured to form a flow path from a first pressure cavity to a second pressure cavity. The brush seal includes a plurality of bristles that extend in a radially outward direction from the first static component to form a brush seal against the second static component.
    Type: Application
    Filed: May 29, 2007
    Publication date: December 4, 2008
    Applicant: EATON CORPORATION
    Inventors: Nicholas P. Daggett, Antonio J. DaCosta, Charles A. Trabert
  • Patent number: 7458584
    Abstract: In accordance with the present application, a fluid seal 30 and fluid sealing element 32, which are tolerant of fluid F direction reversals are provided. A sealing element 32 has at least two brush stages 50 to restrict leakage of the fluid F through a gap 38 between a component and a sealing surface. Each brush stage 50 includes a bristle arrangement 44 sandwiched between a back plate 48 and a common mid plate 46. A value allows 70 the fluid F to bypass a bristle arrangement 44 if the fluid pressure P1 or P2 varies between the chambers. Permanent damage to the sealing element 32 is avoided by allowing the higher pressure fluid F to bypass the upstream bristle arrangement 44 and a properly load the downstream bristle arrangement against a back plate 48.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: December 2, 2008
    Assignee: United Technologies Corporation
    Inventor: Mark E. Addis
  • Publication number: 20080290605
    Abstract: A valve assembly for the sealed reception of a surgical instrument inserted through a cannula assembly includes a valve body defining a central longitudinal axis, and an elongated seal member having a resilient sealing structure defining an aperture in general alignment with the central longitudinal axis. The sealing structure includes a plurality of elongated bristle members positioned to engage the outer surface of the surgical instrument in a fluid-tight manner upon at least partial insertion of the instrument into the valve body. Each bristle member is adapted to be displaced relative to the longitudinal axis to facilitate expansion of the aperture to accommodate variously sized surgical instruments. Bristle members are arranged in a pattern facilitating the reduction of the insertion force required to introduce an instrument while providing robust lateral support for the instrument.
    Type: Application
    Filed: May 21, 2008
    Publication date: November 27, 2008
    Inventors: Oivind Brockmeier, Kenneth Allen Focht, Jared Alden Judson
  • Publication number: 20080290604
    Abstract: A rotary machine includes a machine rotor, a bearing coupled to the machine rotor, a machine stator, and a sealing device disposed between the machine rotor and the machine stator. The sealing device includes a dry gas seal and first and second seals disposed between the dry gas seal and the bearing. One or both of the first and second seals includes a brush seal or more specifically a brush seal including a plurality of non-metallic fibers.
    Type: Application
    Filed: May 24, 2007
    Publication date: November 27, 2008
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: RODERICK MARK LUSTED, CHRISTOPHER EDWARD WOLFE, ERIC JOHN RUGGIERO, GABRIELE MARIOTTI
  • Patent number: 7454822
    Abstract: A method of making a bristle arrangement for a brush seal, which includes providing a bristle arrangement; severing the bristle arrangement, the bristle arrangement now having free ends; and joining the free ends. A method of reworking a bristle arrangement for a brush seal, which includes the steps of: providing a bristle arrangement; removing a section from the bristle arrangement; and adding a replacement section to the bristle arrangement.
    Type: Grant
    Filed: November 21, 2005
    Date of Patent: November 25, 2008
    Assignee: United Technologies Corporation
    Inventors: John A. Szymbor, Mark E. Addis
  • Publication number: 20080284107
    Abstract: The present invention provides a ceramic brush seal including a plurality of ceramic bristles and a support member supporting the plurality of ceramic bristles. Each of the plurality of ceramic bristles extending from a first end to a second end. The plurality of bristles are bent over the support member such that the first end and the second end form a brushing surface on a side of the support member and a fold on an other side of the support member. The plurality of ceramic bristles is made from a ceramic material selected to operate at temperatures in excess of 1500° F.
    Type: Application
    Filed: May 14, 2008
    Publication date: November 20, 2008
    Inventors: Andrew L. Flaherty, Rainer F. Engelmann, Amitava Datta
  • Patent number: 7445212
    Abstract: A brush seal for sealing a rotor with respect to a stator includes a bristle housing which is held on the stator or rotor, a cover plate, a supporting plate, a circumferential surface and two side surfaces and in which bristles oriented with their free ends to the rotor or stator are fastened. The bristle housing, for ensuring correct, anti-rotation installation in its seat, includes a first positioning arrangement on at least one side surface or the circumferential surface, the first positioning arrangement interacting in a positive-locking manner with a correspondingly configured second positioning arrangement on the stator or rotor or a separate fastening element for the definite positioning of the bristle housing.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: November 4, 2008
    Assignee: MTU Aero Engines GmbH
    Inventors: Alfons Gail, Lodewijk Prins, Klemens Werner
  • Publication number: 20080265514
    Abstract: A method and seal assembly for sealing a rotary machine including a rotary component and a stationary component is provided. The method includes providing a plurality of flexible leaf plates in an opening defined between a pair of spaced walls that include an adjustable front wall and an adjustable back wall that is opposed to the front wall. The method also includes adjusting a width of the opening by axially adjusting at least one of the front and back walls with respect to a central rotational axis of the rotary component.
    Type: Application
    Filed: April 30, 2007
    Publication date: October 30, 2008
    Inventor: Jason Paul Mortzheim
  • Publication number: 20080258403
    Abstract: A seal arrangement for a turbo-engine, for sealing a peripheral gap between a rotor and a stator is provided. The stator a seal holder provided with at least one groove for respectively receiving a segmented, dynamic seal. Segments of the dynamic seal are made up of a plurality of brush seal segments, and free ends of bristles of the brush seal segments extend in the radial direction project from the respective groove and lie on the rotor. The or every groove for receiving the brush-type seal segments is designed without an undercut, the brush-type seal segments being received in the respective groove without an undercut in a positive manner.
    Type: Application
    Filed: February 8, 2006
    Publication date: October 23, 2008
    Applicant: MTU Aero Engines GmbH
    Inventors: Stefan Beichl, Alfons Gail