Patents by Inventor Mark Edward Burnett
Mark Edward Burnett 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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Publication number: 20040247430Abstract: A seal assembly and method for a turbomachine having a rotary member and a stationary member circumscribing the rotary member. The seal assembly comprises an annular-shaped platform on the rotary member so as to be disposed at an outer circumferential region thereof. The platform is supported radially outward from the rotary member so as to project beyond axially-adjacent regions of the rotary member. The platform has a contact region radially separated from the rotary member by a cavity. A sealing member is disposed at a radially inward region of the stationary member, with a portion of the sealing member in rubbing contact with the contact region.Type: ApplicationFiled: June 3, 2003Publication date: December 9, 2004Applicant: GENERAL ELECTRIC COMPANYInventors: Bruce William Brisson, Mark Edward Burnett, David Alan Caruso, Robert Edward Deallenbach, James Harvey Vogan, Christopher Edward Wolfe
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Patent number: 6821086Abstract: A seal assembly and method for a turbomachine having a rotary member and a stationary member circumscribing the rotary member. The seal assembly comprises an annular-shaped platform on the rotary member so as to be disposed at an outer circumferential region thereof. The platform is supported radially outward from the rotary member so as to project beyond axially-adjacent regions of the rotary member. The platform has a contact region radially separated from the rotary member by a cavity. A sealing member is disposed at a radially inward region of the stationary member, with a portion of the sealing member in rubbing contact with the contact region.Type: GrantFiled: June 3, 2003Date of Patent: November 23, 2004Assignee: General Electric CompanyInventors: Bruce William Brisson, Mark Edward Burnett, David Alan Caruso, Robert Edward Deallenbach, James Harvey Vogan, Christopher Edward Wolfe
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Publication number: 20040222596Abstract: A packing spring for a steam turbine comprising a flat, elongated spring body of specified length, width and thickness dimensions; a flange at one end of the main spring body; and at least one bend in the main spring body, located substantially midway along the length dimension of the spring body.Type: ApplicationFiled: May 8, 2003Publication date: November 11, 2004Inventors: Lei Zuo, Norman Arnold Turnquist, Frederick George Baily, Mark Edward Burnett, Biao Fang
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Patent number: 6790001Abstract: In a steam turbine high pressure end seal region, brush seals are provided between first and second pressure regions having a pressure drop in excess of the sealing capacity of an individual brush seal. To use brush seals between the first and second regions, one or more intermediate pressure regions are maintained at a substantially fixed predetermined pressure between the first and second pressure regions. Brush seals are interposed between adjacent pressure regions whereby the pressure drop between adjacent pressure regions is within the sealing capacity of the individual brush seal disposed between the adjacent pressure regions.Type: GrantFiled: November 22, 2002Date of Patent: September 14, 2004Assignee: General Electric CompanyInventors: Norman Arnold Turnquist, Mark Edward Burnett, Christopher Edward Wolfe, Frederick George Baily, Daniel Richard Cornell
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Publication number: 20040100035Abstract: A seal assembly includes an annular hanger having a supporting ledge. An arcuate seal segment includes an outer rail mounted on the ledge and supporting an inner seal. An arcuate carrier is mounted between the hanger and the rail, and includes a piston mounted in a bore. The bore is selectively pressurized to deploy the piston between the hanger and rail for temporarily retracting the seal segment from an adjacent rotor component.Type: ApplicationFiled: July 31, 2003Publication date: May 27, 2004Inventors: Norman Arnold Turnquist, Biao Fang, Osman Saim Dinc, Hamid Reza Sarshar, Mehmet Demiroglu, Mark Edward Burnett, Frederick George Baily, Mahmut Faruk Aksit, Ahmad Safi, Richard Robert Larsen
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Publication number: 20040101403Abstract: In a steam turbine high pressure end seal region, brush seals are provided between first and second pressure regions having a pressure drop in excess of the sealing capacity of an individual brush seal. To use brush seals between the first and second regions, one or more intermediate pressure regions are maintained at a substantially fixed predetermined pressure between the first and second pressure regions. Brush seals are interposed between adjacent pressure regions whereby the pressure drop between adjacent pressure regions is within the sealing capacity of the individual brush seal disposed between the adjacent pressure regions.Type: ApplicationFiled: November 22, 2002Publication date: May 27, 2004Inventors: Norman Arnold Turnquist, Mark Edward Burnett, Christopher Edward Wolfe, Frederick George Baily, Daniel Richard Cornell
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Publication number: 20040094900Abstract: A brush seal is provided between static components of a turbine. The turbine flowpath has an inlet spaced from another the inner web of the first stage nozzle. A brush seal is disposed between the two static components to minimize leakage flow to the packing casing region. The bristles of the brush seal are preloaded to fill any gap between the static components caused by distortion or out-of-roundness of the opposed surfaces being sealed. A side plate may contact the opposed sealing surface, increasing the pressure capability of the brush seal and minimizing overall seal leakage by providing the minimum possible flow area restricted solely by the bristles.Type: ApplicationFiled: November 15, 2002Publication date: May 20, 2004Inventors: Norman Arnold Turnquist, Mark Edward Burnett, Huseyin Kizil, Kamlesh Mundra
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Patent number: 6679681Abstract: Steam turbine buckets have radially projecting tenons received in openings of covers. The covers are provided with a profiled surface, with recesses or radially outwardly projecting teeth, or both, to form a gap between the cover and a stationary component having increased pressure drop with resulting decreased leakage flow and reduced potential for solid particle erosion. In the profiled cover surface, the outer surface of the tenon and outer surface of the cover are machined to form the recesses or teeth, affording a flush cover/tenon design with improved sealing efficiencies and reduced solid particle erosion.Type: GrantFiled: April 10, 2002Date of Patent: January 20, 2004Assignee: General Electric CompanyInventors: Mark Edward Burnett, Daniel Randolph Trembley, Maurice David Fournier
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Publication number: 20040000759Abstract: A brush seal is provided wherein the brush seal is disposed in a section of a steam turbine for reducing leakage of a working fluid across a pressure drop. The brush seal comprises a bristle holder attachable to the steam turbine and a plurality of bristles comprising Ni, Cr, Mo, Fe, W, Mn, V, Si, and C.Type: ApplicationFiled: June 28, 2002Publication date: January 1, 2004Applicant: General Electric CompanyInventors: Norman Arnold Turnquist, Thomas Martin Angeliu, Peter Louis Andresen, Mark Edward Burnett, Frederick George Baily
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Patent number: 6669443Abstract: In a steam turbine, a combined brush and labyrinth seal is provided between a diaphragm web and a radially outwardly projecting platform between axially adjacent wheels on the rotor. The brush seal is located upstream of the labyrinth seal teeth. The platform has at least one and preferably a pair of flanges or fins projecting in opposite axial directions adjacent radial outer ends of the platform. Non-uniform heat distribution resulting from the frictional contact between the bristles of the brush seal and a sealing surface on the platform along the rotor surface affecting rotor dynamics is thereby eliminated or minimized.Type: GrantFiled: November 16, 2001Date of Patent: December 30, 2003Assignee: General Electric CompanyInventors: Mark Edward Burnett, Christopher Edward Wolfe, Frederick George Baily, Norman Arnold Turnquist, Bruce William Brisson, David Alan Caruso
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Patent number: 6655696Abstract: A seal carrier is provided for a rotary machine wherein the seal carrier comprises a packing ring coupled to a seal and wherein the packing ring comprises a channel disposed therein. In addition, a displacement apparatus is disposed in the channel for radially positioning the seal to control a flow of a fluid in a fluid path.Type: GrantFiled: June 28, 2002Date of Patent: December 2, 2003Assignee: General Electric CompanyInventors: Biao Fang, Norman Arnold Turnquist, Hamid Reza Sarshar, Mahmut Faruk Aksit, Mark Edward Burnett, Frederick George Baily, Mehmet Demiroglu
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Publication number: 20030194312Abstract: Steam turbine buckets have radially projecting tenons received in openings of covers. The covers are provided with a profiled surface, with recesses or radially outwardly projecting teeth, or both, to form a gap between the cover and a stationary component having increased pressure drop with resulting decreased leakage flow and reduced potential for solid particle erosion. In the profiled cover surface, the outer surface of the tenon and outer surface of the cover are machined to form the recesses or teeth, affording a flush cover/tenon design with improved sealing efficiencies and reduced solid particle erosion.Type: ApplicationFiled: April 10, 2002Publication date: October 16, 2003Inventors: Mark Edward Burnett, Daniel Randolph Trembley, Maurice David Fournier
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Patent number: 6589012Abstract: In a steam turbine, a combined brush and labyrinth seal is provided between a diaphragm web and a sealing surface on a rotatable component radially outwardly of the rotor surface. The contact between the brush seal and sealing surface lies along an axially upstream projecting flange of an annular platform such that heat generated by frictional contact between the bristles and the sealing surface has minimal effect on the rotor surface and hence rotor dynamics. A backup labyrinth seal is provided between the web and platform. Additionally, axially upstream projecting flanges are provided on the downstream buckets and which flanges are spaced radially outwardly of the rotor surface and lie in registration with the diaphragm web. Labyrinth teeth seal between the diaphragm web and the bucket flanges serving as a backup seal.Type: GrantFiled: September 24, 2001Date of Patent: July 8, 2003Assignee: General Electric CompanyInventors: Mark Edward Burnett, Christopher Edward Wolfe, Frederick George Baily, Norman Arnold Turnquist, Bruce William Brisson, David Alan Caruso
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Publication number: 20030095865Abstract: In a steam turbine, a combined brush and labyrinth seal is provided between a diaphragm web and a radially outwardly projecting platform between axially adjacent wheels on the rotor. The brush seal is located upstream of the labyrinth seal teeth. The platform has at least one and preferably a pair of flanges or fins projecting in opposite axial directions adjacent radial outer ends of the platform. Non-uniform heat distribution resulting from the frictional contact between the bristles of the brush seal and a sealing surface on the platform along the rotor surface affecting rotor dynamics is thereby eliminated or minimized.Type: ApplicationFiled: November 16, 2001Publication date: May 22, 2003Inventors: Mark Edward Burnett, Christopher Edward Wolfe, Frederick George Baily, Norman Arnold Turnquist, Bruce William Brisson, David Alan Caruso
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Patent number: 6558118Abstract: A steam turbine has a rotor mounting axially spaced rotor wheels having male dovetails for mounting a plurality of axially spaced buckets having female dovetails. A plurality of arcuate bridging members extend axially between the axially adjacent bucket dovetails at locations spaced radially outwardly of the surface of the rotor shaft. A diaphragm in radial opposition to the bridging member mounts a brush seal having bristles engaging the bridging member. The bridging member carries backup labyrinth seal teeth for sealing with the diaphragm. The friction generated by contact between the brush seal bristles and bridging members lies radially outwardly of the rotor whereby non-uniform distribution of heat about the rotor surface due to frictional contact with the brush seal is avoided, with consequent avoidance of rotor bowing.Type: GrantFiled: November 1, 2001Date of Patent: May 6, 2003Assignee: General Electric CompanyInventors: Bruce William Brisson, Mark Edward Burnett, Frederick George Baily, David Alan Caruso, Norman Arnold Turnquist, Christopher Edward Wolfe
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Publication number: 20030082049Abstract: A steam turbine has a rotor mounting axially spaced rotor wheels having male dovetails for mounting a plurality of axially spaced buckets having female dovetails. A plurality of arcuate bridging members extend axially between the axially adjacent bucket dovetails at locations spaced radially outwardly of the surface of the rotor shaft. A diaphragm in radial opposition to the bridging member mounts a brush seal having bristles engaging the bridging member. The bridging member carries backup labyrinth seal teeth for sealing with the diaphragm. The friction generated by contact between the brush seal bristles and bridging members lies radially outwardly of the rotor whereby non-uniform distribution of heat about the rotor surface due to frictional contact with the brush seal is avoided, with consequent avoidance of rotor bowing.Type: ApplicationFiled: November 1, 2001Publication date: May 1, 2003Inventors: Bruce William Brisson, Mark Edward Burnett, Frederick George Baily, David Alan Caruso, Norman Arnold Turnquist, Christopher Edward Wolfe
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Patent number: 6550777Abstract: A plurality of packing ring segments are provided in a stationary component and about a rotating shaft. Each packing ring segment includes a brush seal insert and a plurality of labyrinth seal teeth along a concave sealing face thereof. Each segment is formed of a pair of components which, in assembly, have a split line through a slot receiving the brush seal insert. The brush seal insert includes a pair of narrow strips or rods welded to outer ends of the bristle pack and is bendable to a range of diameters. By forming forward and backing surfaces defining the slot integral with the components, the width of the bristle slot and the gap between the bristle pack and the forward surface can be readily manufactured and obtained.Type: GrantFiled: June 19, 2001Date of Patent: April 22, 2003Assignee: General Electric CompanyInventors: Norman Arnold Turnquist, Frederick George Baily, Mark Edward Burnett
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Publication number: 20030059298Abstract: In a steam turbine, a combined brush and labyrinth seal is provided between a diaphragm web and a sealing surface on a rotatable component radially outwardly of the rotor surface. The contact between the brush seal and sealing surface lies along an axially upstream projecting flange of an annular platform such that heat generated by frictional contact between the bristles and the sealing surface has minimal effect on the rotor surface and hence rotor dynamics. A backup labyrinth seal is provided between the web and platform. Additionally, axially upstream projecting flanges are provided on the downstream buckets and which flanges are spaced radially outwardly of the rotor surface and lie in registration with the diaphragm web. Labyrinth teeth seal between the diaphragm web and the bucket flanges serving as a backup seal.Type: ApplicationFiled: September 24, 2001Publication date: March 27, 2003Inventors: Mark Edward Burnett, Christopher Edward Wolfe, Frederick George Baily, Norman Arnold Turnquist, Bruce William Brisson, David Alan Caruso
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Patent number: 6517314Abstract: In a steam turbine, a combined brush and labyrinth seal is provided between a diaphragm web and axial projecting platforms on bucket dovetails at a location spaced radially outwardly of the outer diameter of the rotor. The downstream axially adjacent bucket dovetails also have platforms serving as complementary sealing surfaces to labyrinth teeth formed on the web. By locating the combined labyrinth and brush seal radially outwardly of the outer diameter of the shaft, thermal bowing of the rotor is eliminated. By providing backup labyrinth seals at the same radial location, axial thrust loads are eliminated in the event of brush seal failure.Type: GrantFiled: November 5, 2001Date of Patent: February 11, 2003Assignee: General Electric CompanyInventors: Mark Edward Burnett, Norman Arnold Turnquist, Christopher Edward Wolfe, Bruce William Brisson, Fredrick George Baily, David Alan Caruso
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Publication number: 20020190474Abstract: A plurality of packing ring segments are provided in a stationary component and about a rotating shaft. Each packing ring segment includes a brush seal insert and a plurality of labyrinth seal teeth along a concave sealing face thereof. Each segment is formed of a pair of components which, in assembly, have a split line through a slot receiving the brush seal insert. The brush seal insert includes a pair of narrow strips or rods welded to outer ends of the bristle pack and is bendable to a range of diameters. By forming forward and backing surfaces defining the slot integral with the components, the width of the bristle slot and the gap between the bristle pack and the forward surface can be readily manufactured and obtained.Type: ApplicationFiled: June 19, 2001Publication date: December 19, 2002Inventors: Norman Arnold Turnquist, Frederick George Baily, Mark Edward Burnett