Resilient, Flexible, Or Resiliently Biased Patents (Class 415/174.2)
  • Patent number: 6540231
    Abstract: Brush seal lifetime and sealing efficiency are increased by providing a brush seal with a holder and a carrier moveably suspended from the holder by a plurality of flexible support wires. A plurality of bristles is secured to the carrier. Preferably, the holder is attached to a stationary member, and the bristles sealingly engage a rotating member.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: April 1, 2003
    Assignee: General Electric Company
    Inventors: Richard L. Trantow, Jimmy A. Murphy, Ronald R. Eskridge
  • Publication number: 20030059298
    Abstract: 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: Application
    Filed: September 24, 2001
    Publication date: March 27, 2003
    Inventors: Mark Edward Burnett, Christopher Edward Wolfe, Frederick George Baily, Norman Arnold Turnquist, Bruce William Brisson, David Alan Caruso
  • Patent number: 6511285
    Abstract: Two stages of relatively rotatable guide vanes (22,24) are arranged in tandem. Shroud portions (42,46) on the vanes overlap in loose engagement, until an associated gas turbine engine starts operating. Gas loads then act on the downstream vane stage (24) and move it in a downstream direction until the opposing flanks of radially opposing lands (44,48) on respective shrouds (42,46) engage, whereupon, gas leakage via the overlap onto the turbine casing (40) is at least substantially reduced.
    Type: Grant
    Filed: February 5, 2002
    Date of Patent: January 28, 2003
    Assignee: Rolls-Royce plc
    Inventor: Alec G Dodd
  • Patent number: 6508624
    Abstract: A turbomachine for moving air includes a shroud 12 disposed about an axis A. The shroud 12 has a pair of opposing faces 14 and 16 defining a gap 18 therebetween. The opposing faces are disposed generally transversely with respect to the axis. A rotor assembly 13 is mounted for rotation about the axis. The rotor assembly has a plurality of blades 22 with tips of the blades being coupled to an annular band 30. At least a portion 32 of the annular band is disposed in the gap 18. Seal structure 36 extends from each opposing face of the shroud and into the gap to reduce swirl and minimize air leakage across the gap.
    Type: Grant
    Filed: May 2, 2001
    Date of Patent: January 21, 2003
    Assignee: Siemens Automotive, Inc.
    Inventors: Sylvain Nadeau, William Holmes
  • Patent number: 6505835
    Abstract: The brush seal includes a plurality of bristles located in grooves along opposite sides of a single carrier. The grooves extend at a predetermined cant angle relative to radii of a sealing surface about which the brush seal extends. The grooves are formed between ribs which terminate in tips deformed to overlie the bristles in the groove and thereby retain the bristles on the carrier. An epoxy overlies the carrier surfaces and grooves to facilitate their retention. The brush seal may be fabricated by rolling knurled rollers with oblique cutting ribs along opposite surfaces of the carrier to form the grooves. The bristles are then wrapped about the carrier and in the grooves. Subsequently, the tips of the ribs defining the grooves are deformed to overlie and retain the bristles in the grooves.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: January 14, 2003
    Assignee: General Electric Company
    Inventors: Wei Tong, Zhang-Qing Zhuo
  • Publication number: 20020172591
    Abstract: A turbine cooling circuit includes a flow sleeve having an aft end for adjoining the rim of a turbine disk. A seal rotor is spaced from the aft end adjacent a row of inlet holes. An inducer has an outlet disposed radially outwardly from the sleeve inlet holes. And, a seal stator surrounds the seal rotor to define a rotary seal disposed radially inwardly from the inducer outlet.
    Type: Application
    Filed: May 21, 2001
    Publication date: November 21, 2002
    Inventors: Christopher Charles Glynn, Thomas Tracy Wallace, Ronald Arthur Dickman, Monty Lee Shelton
  • Patent number: 6464457
    Abstract: A gas turbine engine arcuate segment has an arcuate band segment, at least one tab and an arcuate rail segment spaced axially apart from the tab and located along an axial end of the band segment. The tab and the arcuate rail segment extend radially away from the band segment and a space is located between the tab and the rail segment. A tab aperture extends entirely through the tab. The rail segment has a rail aperture entirely therethrough. A leaf seal and a spring are disposed within the space to bias the leaf seal against the aft rail. In an exemplary embodiment, a spring aperture extends entirely through the spring, a seal aperture extends entirely through the leaf seal, and a headless pin is disposed in the apertures such that the leaf seal and the spring are radially restrained by the pin.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: October 15, 2002
    Assignee: General Electric Company
    Inventors: Clive A. Morgan, Todd S. Heffron, Eric J. Wienholts, Robert I. Ackerman, John P. Heyward
  • Patent number: 6464232
    Abstract: A sealing device is disclosed comprising a least one sealing leaf maintained axially in position by a retaining bracket which comprises a first end bearing on the sealing leaf and a bent-back second end engaged in a groove in a structural element. The sealing leaf is preferably retained radially in position by lugs which are bent so as to engage below lugs provided on the retaining bracket. When the sealing device comprises at least two adjacent sealing leaves placed edge to edge, the device also comprises a cover sheet so disposed between the sealing leaves and the retaining bracket as to cover the joint between the two adjacent leaves.
    Type: Grant
    Filed: November 9, 1999
    Date of Patent: October 15, 2002
    Assignee: Societe Nationale d'Etude et de Construction de Monteurs d'Aviation “Snecma”
    Inventors: Marc Roger Marchi, Jean-Pierre Louis Mareix, Patrice Rosset
  • Patent number: 6443698
    Abstract: A rotor assembly for a gas turbine engine including a bearing centering sub-assembly that facilitates reduces an effect of radial forces transmitted to a bearing assembly is described. The bearing assembly supports a rotor shaft with a rolling element positioned radially inward from an outer race. The bearing centering sub-assembly is coupled to the outer race and includes a plurality of first springs and a plurality of second springs extending circumferentially in rows. Each first springs is coupled between a second spring and the outer race such that each first spring is radially aligned with respect to each second spring.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: September 3, 2002
    Assignee: General Electric Company
    Inventors: Bala Corattiyil, Barry Lynn Allmon
  • Patent number: 6439844
    Abstract: The adjoining edges of bucket covers are sealed one to the other. A brush seal projecting from a stationary shroud overlies the bucket covers. A joint at which the adjacent covers sealingly engage each other precludes radial outflow of high pressure fluid into bristles of the brush seal, preventing radial and axial deflection of the bristles and consequent failure of the bristles. The joints between the covers may comprise lap or tongue-and-groove joints.
    Type: Grant
    Filed: December 11, 2000
    Date of Patent: August 27, 2002
    Assignee: General Electric Company
    Inventors: Norman Arnold Turnquist, Lawrence D. Willey, Christopher Edward Wolfe
  • Patent number: 6434944
    Abstract: A turbine system has a turbine that uses an aeromatic hydrocarbon as a working fluid. The turbine discharges the fluid in vapor form against a boundary layer on the inside of a rotor where it condenses as it loses its energy. The outside of the rotor is formed to define chambers which are divided into suction and discharge or pressure cavities by stationary and rotating seals. Apertures connect the boundary layer to the pump chambers and apertures are positioned as discharge ports so that as the rotor rotates, it also pumps the working fluid into a closed loop system in which it is reheated and reintroduced into the turbine through a nozzle. The fluid is heated by a fluid heater that may be positioned in the interior of the rotor.
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: August 20, 2002
    Assignee: Thermaldyne, LLC
    Inventor: William P. White
  • Patent number: 6425743
    Abstract: A throttle device for liquid or gaseous media including a turbine which drives a compressor, a pump or a generator, and in which throttling of liquid or gaseous flow occurs by modifying the turbine load state.
    Type: Grant
    Filed: August 15, 2001
    Date of Patent: July 30, 2002
    Assignee: Filterwerk Mann & Hummel GmbH
    Inventor: Christian Fischer
  • Patent number: 6422815
    Abstract: The knife edge air seal ring of a gas turbine is modified to receive a replacement or second seal ring portion having a wire brush seal. The replacement or wire brush air seal ring is mounted with the existing knife edge air seal mounting ring at a location so that the existing mounting ring may be used, while providing adequate strength and structural support for installation of the second, wire brush seal ring. The replacement seal ring may be provided with knife edge seals as well, if desired.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: July 23, 2002
    Assignee: General Electric Company
    Inventors: Keith A. Marler, Matthew C. Lau, Shawn K. Smith
  • Patent number: 6406253
    Abstract: A turbocharger for an internal combustion engine is of the type having an impeller mounted on a shaft carried by a bearing supplied with lubricating oil, the shaft being located in a bore and having an oil and air seal between the bearing and the impeller hub. The seal is a floating ring seal mounted in the bore and extending radially into a circumferential recess in the impeller hub. In use, the ring seal experiences a pressure differential across it which urges it to slide axially along the bore so that it forms a sealing interface with a side face of the recess. The shaft rotates relative to the ring seal, which is therefore subject to wear against the side face of the recess. Hence, a shoulder is provided in the bore to limit excessive axial sliding of the ring seal due to wearing away of the ring seal against the side face of the recess.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: June 18, 2002
    Assignee: Alstom
    Inventor: Francis Joseph Geoffrey Heyes
  • Patent number: 6402477
    Abstract: A turbine, adaptable to improve the survivability of fish present in water flowing therethrough, includes a hub and associated runner blades. Each blade comprises an inner edge and a distal outer edge, a leading edge and a trailing edge separated by a water directing surface. Each blade is rotatable relative to the hub about a blade rotational axis. The turbine is provided with a gap shielding device designed to shield a gap formed between the hub and the blade inner edge as the blade is rotated about its axis. The gap shielding device may comprise a plurality of independently biased pins, a plurality of fluid jets, a plurality of flexible members, a fluid-filled boot, and combinations thereof.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: June 11, 2002
    Assignee: Voith Siemens Hydro Power Generation, Inc.
    Inventors: Joseph M. Cybularz, Richard K. Donelson, Richard K. Fisher, Jr., Robert G. Grubb, Randy V. Seifarth, Siegbert Etter, Donald E. Zehner
  • Patent number: 6402466
    Abstract: A leaf seal assembly is secured to the trailing edge of a shroud segment for sealing between the shroud segment and the leading edge side wall of a nozzle outer band. The leaf seal includes a circumferentially elongated seal plate biased by a pair of spring clips disposed in a groove along the trailing edge of the shroud segment to maintain the seal plate in engagement with the flange on the leading edge side wall of the nozzle outer band. The leaf seal plate and spring clips receive pins tack-welded to the shroud segment to secure the leaf seal assembly in place.
    Type: Grant
    Filed: May 16, 2000
    Date of Patent: June 11, 2002
    Assignee: General Electric Company
    Inventors: Steven Sebastian Burdgick, Brendan Francis Sexton
  • Patent number: 6375414
    Abstract: A pump (1) for pumping a slurry comprises a pump housing (2) defining a pumping chamber (5) with an impeller (6) located therein for pumping the slurry from an axial inlet port (7) to a radial outlet port (8). The impeller (6) is carried on a pump shaft (10) which is in turn rotatably carried in a shaft carrier sleeve (18) in a carrier housing (12) which also carries the pump housing (2). The shaft carrier sleeve (18) and the pump shaft (10) are axially adjustable in the direction of the arrows A and B for adjusting an axial clearance gap (25) between the impeller (6) and the pump housing (2). A shaft seal (9) for sealing the pumping chamber (5) comprises a packed gland seal (42) and a rotating sealing ring (38) and a stationary sealing ring (39). A lubricating fluid cavity (40) is located between the packed gland seal (42) and the rotating and stationary sealing rings (38,39) for lubricating axially facing rotating and stationary sealing surfaces (52,58).
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: April 23, 2002
    Assignee: Alcan International Limited
    Inventor: George J. Delaney
  • Patent number: 6371722
    Abstract: A large number of nozzle vanes 16 are arranged in an annular channel 10 formed between opposed surfaces of turbine housing 1 and turbine shroud 9. A recess 20 is constructed on the formation surface of the annular channel 10 of the turbine housing 1, and in this recess, a clearance control plate 21 is disposed so that the clearance C between the plate and nozzle vanes 16 becomes constant. Two gaskets 25 whose outer rims are formed in a bead shape are laid in a gap S on the rear side of clearance control plate 21, in such a manner that outer rims of the gaskets separate from each other. In this configuration, outer rims widen when gas pressure is applied, and gas can be sealed stably without leakage.
    Type: Grant
    Filed: March 13, 2000
    Date of Patent: April 16, 2002
    Assignee: Ishikawajima-Harima Heavy Industries Co., Ltd.
    Inventor: Yukio Takahashi
  • Patent number: 6368054
    Abstract: A tip clearance control device for a gas turbine engine having a shroud surrounding a stage of rotor blades. The tip clearance control device comprises a one-piece split ring having opposed overlapping end portions. The split ring is directly supported onto the inner surface of the shroud and is adapted to automatically adjust for thermal growth of the shroud during engine operation.
    Type: Grant
    Filed: December 14, 1999
    Date of Patent: April 9, 2002
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Terry Lucas
  • Patent number: 6340286
    Abstract: A rotary machine includes a rotatable rotor, blades radially mounted on and spaced apart about the rotor, a stationary casing disposed about and radially outward from the rotor and blades defining an annular gap between the casing and tips of the blades, and a flexible abradable seal assembly attached on the casing and disposed within the annular gap such that during differential growth of the rotor and blades relative to the casing the seal assembly flexes and abrades in response to contact by the blade tips and thereby clearance between the casing and blade tips is controlled as to avoid contact by the moving blade tips with the casing.
    Type: Grant
    Filed: December 27, 1999
    Date of Patent: January 22, 2002
    Assignee: General Electric Company
    Inventors: Mahmut Faruk Aksit, Raymond Edward Chupp, Osman Saim Dinc
  • Patent number: 6328528
    Abstract: A water pump with a plurality of elastomeric blades on a rigid impeller is disclosed. The impeller has a tubular extension with a pair of flats on the outer diameter of the extension. The seal seat has a corresponding pair of flats on its inner diameter to engage the flats on the tubular extension for positive rotation. The impeller also has a retaining lip formed on its inner diameter and a sealing shoulder to form a retaining cavity along the tubular extension. The retaining lip receives the seal seat in the cavity by stretching the lip radially into a gap to accommodate the outer diameter of the seal seat. This stretch to fit feature eliminates the need to control the outer diameter of the seal ring to precise dimensions. The lip forms a static seal with the outer diameter of the seal seat. The elastomeric shoulder provides a static seal against the seal seat.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: December 11, 2001
    Assignee: Freudenberg-Nok General Partnership
    Inventor: John C. Dahlheimer
  • Patent number: 6302646
    Abstract: A rotary machine has a rotor and a surrounding stator. The rotor has an outer surface with an upstream larger-radius first section, a downstream smaller-radius second section, and an intervening third section which has an area facing in a direction other than perpendicular or parallel to the axis of the rotor. In one example, the area includes a first convex area and a second concave area. The machine also has a first brush seal with bristles whose free ends are positioned near the second section, and the machine may also include a second brush seal with bristles whose free ends are positioned near the first section and with a front plate having a ledge projecting away from its corresponding bristles.
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: October 16, 2001
    Assignee: General Electric Company
    Inventors: Osman Saim Dinc, Robert Joseph Albers, Yahya Dogu, Ming Zhou
  • Patent number: 6290456
    Abstract: A fan having a rotor with a plurality of fan blades, the fan having an intake and a pressure side. A blocking device between the intake and pressure sides of the fan. The blocking device comprising a strip-like brush element with a plurality of brush sections that extend radially upwardly toward the edge of the rotor. The brush sections are spaced apart from one another along the direction from the intake to the pressure side of the fan. A cross-flow fan has spaced apart brush sections which are spaced apart in the running direction of the fan. An axial flow fan has brush sections which are spaced apart from one another transversely with respect to the running direction. The brush sections in each of the fans may also be as in the other type of fan. The brush sections may define a v-shape extending from a common block or may be in spaced apart rows or may be individual tufts and the tufts may be staggered along the length of the brush.
    Type: Grant
    Filed: January 26, 2000
    Date of Patent: September 18, 2001
    Assignee: LTG Aktiengesellschaft
    Inventors: Rolf Fichter, Ralf Widmann
  • Patent number: 6261057
    Abstract: An arrangement and method for accurately radially locating a brush seal relative to a rotor provides a labyrinth seal segment having a slot open toward the rotor and defining an interior ledge facing away from the rotor, a brush seal segment inserted in the slot and having an exterior shoulder facing toward the rotor and overlying the interior ledge of the labyrinth seal segment such that the brush seal segment can move radially relative to the labyrinth seal segment and rotor and the shoulder of the brush seal segment can move toward and away from the interior ledge of the labyrinth seal segment, and set screws tightened into spaced apart threaded holes in the labyrinth seal segment forcing the shoulder of the brush seal segment against the ledge of the labyrinth seal segment so as to prevent radial floating of the brush seal segment relative to the labyrinth seal segment.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: July 17, 2001
    Assignee: General Electric Company
    Inventors: Norman Arnold Turnquist, Frederick George Baily, Lawrence Edward Rentz
  • Patent number: 6261061
    Abstract: A method and apparatus for mounting a bearing on a shaft. An intermediate member is mounted on the shaft. The inner race of the bearing is mounted onto the intermediate member. Two separable compression members are mounted on the outer diameter of the inner race. The compression members are mounted with an interference fit, thus inducing a state of compression in the inner race. The intermediate member is radially compliant and compensates for thermal growth of the shaft in excess of the thermal growth of the inner race. The state of compression in the inner race persists to about 1000° F. In one embodiment, the present invention includes an inner race fabricated from a material with low fracture toughness or for which a state of compression is desirable, such as a ceramic material.
    Type: Grant
    Filed: May 2, 2000
    Date of Patent: July 17, 2001
    Assignee: Rolls-Royce Corporation
    Inventor: Eugene E. Pfaffenberger
  • Patent number: 6254344
    Abstract: An annular seal comprising a mass of bristles (10) packed together in a layer axially adjacent to an annular backing plate (12). The bristles (12) and backing plate (14) are mounted on and extend from a radially outer member (4) towards and around a cylindrical inner member (2). The outer (4) and inner (2) cylindrical members rotate relative to each other about an axis (1). The bristles (10) co-operate with the inner cylindrical member (2) to form a seal thereagainst. An expansion ring (18) is disposed radially inwardly of the backing plate (14) and is mounted in substantially the same plane from the backing plate (14) via a suitable mounting arrangement (16) which is arranged to permit radial movement of the expansion ring (18) relative to the backing plate (14) and the operational position of the inner cylindrical member (2).
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: July 3, 2001
    Assignee: Rolls-Royce plc
    Inventors: Christopher Wright, Steven V Allen, Guy Saysell, Jonathan J Morgan
  • Patent number: 6254339
    Abstract: A turbine disposed in a water passageway includes a hub and associated runner blades. Each blade comprises an inner edge and a distal outer edge, a leading edge and a trailing edge separated by a water directing surface. Each blade is rotatable relative to the hub about a blade rotational axis. The water passageway includes a spherically-shaped discharge ring that conforms to the outer edges of the blades to improve certain turbine parameters such as cavitation, efficiency, flow disturbance, and fish survivability. The turbine hub may also include a spherically-shaped outer surface in a region swept by the inner edges of the blades when the blades are rotated from maximum to minimum pitch, as well as seals attached to the inner edges of the blades. The hub may also be associated with blades in which the chord is reduced in the root region of the blade.
    Type: Grant
    Filed: June 2, 1999
    Date of Patent: July 3, 2001
    Assignee: Voith Siemens Hydro Power Generation, Inc.
    Inventors: Richard K. Fisher, Jr., Robert G. Grubb, Joseph M. Cybularz, Richard K. Donelson, Mark E. Kennell, Wolfgang Heine
  • Patent number: 6250879
    Abstract: A brush seal for sealing a leakage path located between a rotating member and a stationary member includes an intermediate plate attached to the stationary member and having at least one purge hole formed therein. The brush seal also includes a first end plate attached to the stationary member on one side of the intermediate plate and a second end plate attached to the stationary member on the other side of the intermediate plate. A first bristle pack is disposed between the first end plate and the intermediate plate, and a second bristle pack is disposed between the second end plate and the intermediate plate.
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: June 26, 2001
    Assignee: General Electric Company
    Inventor: Elias H. Lampes
  • Patent number: 6210108
    Abstract: A wall first portion of an article is provided with reduced tensile stress, of an amount less than that which can result in cracking of the wall, with an elongated opening through the wall first portion. The opening separates areas of a wall first portion and extends generally toward a wall second portion under a lower or different stress.
    Type: Grant
    Filed: August 16, 1999
    Date of Patent: April 3, 2001
    Assignee: General Electric Company
    Inventor: Susan E. Ebacher
  • Patent number: 6206629
    Abstract: A turbine brush seal protection device includes an annular substrate having an outer periphery and defining a slot open at the outer periphery. The slot is for receiving a portion of an annular brush seal of a gas turbine subassembly during installation of a gas turbine and such that the annular substrate at least partially covers the annular brush seal of the gas turbine subassembly. The annular substrate at the outer periphery and within the slot thereof is removably mounted to a stationary portion of the gas turbine subassembly.
    Type: Grant
    Filed: August 18, 1999
    Date of Patent: March 27, 2001
    Assignee: General Electric Company
    Inventors: George Ernest Reluzco, Osman Saim Dinc, Norman Arnold Turnquist, Robert Harold Cromer
  • Patent number: 6196790
    Abstract: A seal assembly for use in an intershaft seal includes a first seal that seals to a seal plate on an inner rotor shaft, a second seal that seals to a seal plate on an outer rotor shaft, and an intermediate seal that is supported by a stator assembly and seals to the first seal and the second seal. The intermediate seal may include a seal segment affixed to the stator assembly, a ring seal between the seal segment and the first seal, and a ring seal between the seal segment and the second seal. An intershaft seal with this seal assembly has less flex than a prior art intershaft seal and thereby results in greater durability and less seal wear.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: March 6, 2001
    Assignee: United Technologies Corporation
    Inventors: William G. Sheridan, Harold K. Shaffer
  • Patent number: 6168377
    Abstract: Brush seals are employed on steam turbine rotors without the risk of causing thermal rotor bowing and without compromising the sealing performance. In one form, a groove in the rotor has an insert in frictional contact with the brush seal. The non-uniform distribution of heat due to frictional contact between the brush seal and proud portions of the rotor is dissipated within the insert such that adjoining rotor portions are substantially uniformly heated without causing thermal bow. In a further form, a groove or grooves are provided in the rotor surface adjacent to the brush seal and maintain non-uniform heat distribution locally in the rotor without causing thermal bow of the rotor. In another form, a land projects radially outwardly of the rotor surface in contact with the brush seal. The non-uniform distribution of heat due to frictional contact between proud portions of the land and the brush seal dissipates into a uniform distribution of heat in the rotor proper to avoid thermal bowing.
    Type: Grant
    Filed: January 27, 1999
    Date of Patent: January 2, 2001
    Assignee: General Electric Co.
    Inventors: Christopher Edward Wolfe, Frederick George Baily, Lawrence Edward Rentz, Alexander Morson, Norman Arnold Turnquist, Paul Thomas Marks, Roger Jordan Carr