Fluid Introducer Or Director Patents (Class 277/512)
  • Patent number: 10060553
    Abstract: A valve including a valve housing through which a process medium can flow and in which a valve seat is located, which surrounds a through-flow opening and to which a valve member mounted on a spindle is assigned in such a way that the valve member can be moved by means of an actuating stroke of the spindle between a blocking position in which the valve member bears against the valve seat in a process medium-tight manner and an open position in which the valve member is raised off the valve seat, and wherein an interface for coupling a drive unit generating the actuating stroke of the spindle is provided on the valve housing, and wherein a sealing device through which the spindle passes is accommodated in the valve housing, the sealing device is accommodated in a seal cartridge which is separate from the valve housing and configured as an operational pre-assembly.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: August 28, 2018
    Assignee: FESTO AG & CO. KG
    Inventors: Jasmin Hotz, Markus Dreher, Michael Kanthack
  • Patent number: 10027195
    Abstract: A motor having a cooling structure includes: a motor shaft in which a cooling passage is formed in a center thereof in a lengthwise direction; a rotor disposed at an exterior circumference of the motor shaft to rotate together with the motor shaft; and a motor housing in which a stator fixed at a predetermined interval from the rotor is disposed at an interior circumference thereof and in which the motor shaft is disposed to be rotatable, wherein a coolant flowing through the cooling passage is jetted to the rotor or the stator.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: July 17, 2018
    Assignee: Hyundai Motor Company
    Inventors: MyungKyu Jeong, Young Jin Seo, Dongyeon Han
  • Patent number: 9903475
    Abstract: A packing ring is disclosed for sealingly engaging a movable rod member within a stuffing box having an internal cavity. In an embodiment, the packing ring includes a carrier and a sealing ring mounted to the carrier. The sealing ring is configured to sealingly engage with an outer surface of the rod when the rod is disposed within the internal cavity. The carrier includes a radially outer surface that is configured to sealingly engage with an internal surface of the stuffing box. In addition, the carrier includes a radially inner surface that is proximate to an outer surface of the rod when the rod extends through the stuffing box. Further, the carrier includes a plurality of lubrication grooves each groove extending from the radially outer surface to the radially inner surface and configured to convey a lubricant flow between the radially outer surface and the radially inner surface.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: February 27, 2018
    Assignee: NATIONAL OILWELL VARCO, L.P.
    Inventors: Joshua Ryan Ruffin, Jeremy Michael Rappenecker
  • Patent number: 9709172
    Abstract: A shaft seal assembly for sealing along a rotor shaft is provided. The shaft seal assembly includes a seal housing, annular inner and outer seal members, an annular middle element, and an end plate. The seal housing has a seal member bore and a shaft bore. The annular inner and outer seal members are configured to be disposed in the seal member bore. The middle element is disposed between the inner seal member and the outer seal member within the seal member bore. The end plate is attached to the seal housing and covers a portion of the seal member bore. The middle element biases the inner seal member against the seal housing and biases the outer seal member against the end plate.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: July 18, 2017
    Assignee: Farrel Corporation
    Inventors: Stuart Sardinskas, Matthew Bonito
  • Patent number: 9334990
    Abstract: A coupling device for a tube includes a pressure element comprising first and second pressure element segments for exerting a clamping force on the tube. The pressure element includes surfaces that converge towards each other in a radial direction away from the tube and that are directly or indirectly disposed against support elements. The first pressure element segment is placed proximally and the second pressure element segment distally with respect to the tube. The first and the second pressure element segments are each provided with contact surfaces that abut and co-operate with each other at a predetermined incline in relation to the longitudinal axis of the tube such that during tension strain between the coupling and the tube, the first pressure element segment is caused to clamp the tube more tightly and the second pressure element segment endows an increased force on the support elements.
    Type: Grant
    Filed: November 6, 2006
    Date of Patent: May 10, 2016
    Assignee: GEORG FISCHER WAGA N.V.
    Inventor: Andreas Jacobus Louis Nijsen
  • Patent number: 9188242
    Abstract: In accordance with the present invention, there is provided a fluid or liquid barrier packing system which is adapted to minimize VOC emissions, while also providing live-loading and continuous load monitoring functions. The components of the packing system (including the liquid barrier) are adapted to be installed in a traditional stuffing box of a valve utilizing a top entry method, and without the necessity of having to inject the liquid through any side ports of the valve. The packing system reduces leakage levels as required by low emission leakage specifications by creating a reverse osmosis effect, limiting the diffusivity of a gas through the packing elements of the system. Thus, the packing system of the present invention provides a simplified method to load and monitor a barrier in the stuffing box of the valve to slightly higher pressure than processed fluid pressure.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: November 17, 2015
    Assignee: Control Components, Inc.
    Inventors: Fabio Giove, Jalal Abrahimzadeh
  • Publication number: 20130340585
    Abstract: The invention relates to a seal for a sawing machine (1) for separating electronic components (12), comprising: an elongate form-retaining holder (20,22), a flexible, elongate expandable body (8,9)and a pressure source (24) for a medium, wherein the elongate expandable body (8,9) is provided with a strengthened elongate edge (21) which lies clear of the form-retaining holder (20,22) The invention also relates to a sawing machine (1) for separating electronic components (12) provided with such a seal.
    Type: Application
    Filed: December 21, 2011
    Publication date: December 26, 2013
    Applicant: BESI NETHERLANDS B.V.
    Inventors: Mark Hermans, Lambertus Franciscus Wilhelmus Van Haren, Gerardus Hermanus Johannes Reulink
  • Patent number: 8608176
    Abstract: A sealing arrangement for the sealed leadthrough of rotating shafts (2) through housing bores of housings (1) comprises at least one lip seal (3, 8, 14, 15) with a sealing lip that faces toward the area normally under higher pressure. In order to extend substantially the area of application of sealing arrangements with lip seals and by doing so, to make use of the sealing arrangement to achieve its advantages of being more economical, more durable also at pressure peaks, easier to install, and easier to maintain, also at higher pressures and pressure fluctuations, the lip seal (3, 8, 14, 15) on the side (5) facing the area with higher pressure is under a constant pressure that is higher than the highest pressure occurring inside the housing (1), and a gap (7, 10) that throttles the outflow is provided between this area and the inside of the housing.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: December 17, 2013
    Assignee: Andritz AG
    Inventors: Thomas Bachhofner, Stephane Hörner
  • Publication number: 20130234401
    Abstract: A seal for installation within a flowline diverter assembly including a housing having a bore, and a spool received within the bore. The seal includes an annular body configured to be received between the spool and the bore. The body also has an inner diameter face disposable opposite the spool, and an outer a fluid face disposable opposite the bore. The inner diameter face has a first and a second lip portion which are energizable responsive to fluid pressure. A generally annular first spring member is molded into the outer diameter face adjacent a first end face of the body, and a generally annular second spring member is molded into the body outer diameter face adjacent a second end face. Generally annular third and fourth spring members each also may be molded into a corresponding one of the body lip portions.
    Type: Application
    Filed: December 16, 2011
    Publication date: September 12, 2013
    Inventor: Thomas R. Smith
  • Patent number: 8376366
    Abstract: The invention provides a sealing gland capable of use in high-pressure environments and methods for the use thereof. One aspect of the invention provides a sealing gland including: a first sealing surface having a first groove and a second groove, a first O-ring received in the first groove, a second O-ring received in the second groove, and a pressure port located on the first sealing surface between the first groove and the second groove. The pressure port is configured to apply a fluid pressure intermediate to a first pressure applied to the first O-ring and a second pressure applied to the second O-ring.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: February 19, 2013
    Assignee: Schlumberger Technology Corporation
    Inventor: Ed Richards
  • Patent number: 8297623
    Abstract: The invention relates to a sealing device for a swivel, an improved attachment device and a method for improving a seal in a swivel, where a sealing medium is composed according to the viscosity and chemical composition of the application concerned and has a viscosity substantially over 500 cst and where the sealing medium is pressurized by a pressure transmission unit.
    Type: Grant
    Filed: November 1, 2005
    Date of Patent: October 30, 2012
    Assignee: Framo Engineering AS
    Inventor: Jens Ødegaard
  • Patent number: 8181969
    Abstract: A lubrication blocking seal includes a hollow body that has upper and lower planar surfaces, a surrounding wall, a reservoir area and an open top. The body has upper and lower seal-receiving recesses located in the upper and lower planar surfaces, and a lower central aperture sized and shaped to fit closely about a rotating shaft. A cover is sized and shaped to seal to the hollow body and has an upper central aperture sized and shaped to fit closely about the rotating shaft and means for mounting a bearing about the shaft and to the cover. A lower seal is sized and shaped to fit closely about the rotating shaft and into the lower seal-receiving recess. An upper seal is sized and shaped to fit closely about the rotating shaft and into the upper seal-receiving recess. A quantity of lubricating material sufficient to fill the reservoir area is provided.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: May 22, 2012
    Assignee: Diversified Minerals Inc.
    Inventors: James W. Price, Andy Austin
  • Patent number: 8056428
    Abstract: The present invention relates to a lubricating element (12) for rolling element tracks, in particular linear systems, with a body composed of a lubricant-storing material, which includes an application section (34) capable of being brought in contact with a rolling element bearing surface to supply lubricant, and which includes a storage region (22) for lubricant that abuts the application section (34), the body being provided with at least one recess (38) in the storage region (22), on an end opposite to the application section (34).
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: November 15, 2011
    Assignee: Robert Bosch GmbH
    Inventors: Gerald Vierheilig, Matthias Zeier, Juergen Mueller
  • Patent number: 7971854
    Abstract: A replaceable valve shaft sealing system is disclosed that enables the operator to greatly reduce the maintenance needs of valves where rotational movement of a shaft, that is connected to the actual metering apparatus of the valve, actuates the opening or closing of the valve thereby regulating fluid flow. The design of the shaft enables the user to replace the valve stem and associated sealing rings or to re-lubricate the shaft, while the valve is connected to the line, by simply removing the packing nut. There are no-preloaded sealing devices that require re-construction. Prior art designs use O-rings to prevent the seepage of fluid into the valve body and though the rotating shaft, but the disclosed shaft prevents contamination of the lubrication into the fluid flow and eliminates any of the axial loads that can cause O-rings to fail using the prior art designs.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: July 5, 2011
    Assignee: Griswold Controls Inc
    Inventor: David B Keiser
  • Patent number: 7762558
    Abstract: A device for sealing a rotating shaft that penetrates a stationary housing wall has a sealing ring fastened to the housing wall and arranged between the housing wall and a shaft. The sealing ring has sealing oil supply bores supplying sealing oil into a sealing gap formed between an inner wall surface of the sealing ring and an outer wall surface of the shaft. The inner wall surface has pocket-shaped recesses where the sealing oil supply bores open. The pocket-shaped recesses extend in the circumferential direction of the sealing ring. The inner wall of the sealing ring has at least one circumferential boundary stay that delimits and seals the pocket-shaped recesses in an axial direction of the sealing ring toward the first or second housing side. The inner wall surface of the sealing ring has a circumferential groove that connects the pocket-shaped recesses to one another.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: July 27, 2010
    Assignee: Sensoplan Aktiengesellschaft
    Inventor: Karl Schöllhorn
  • Publication number: 20090274570
    Abstract: A self-aligning dynamic clearance seal assembly is disclosed. The assembly comprises a stationary casing, a moving member, a housing member circumferentially disposed between the stationary casing and the moving member, a sealing member circumferentially disposed between the housing member and the moving member, and two elastomeric seals. The first elastomeric seal prevents the flow of a fluid into a gap between the sealing member and the stationary casing. The second elastomeric seal, when compressed, prevents the housing member from biasing against the sealing member. The sealing member and the moving member define a continuous and uniform gap having a size that allows the fluid to fill the gap but prevents the fluid from flowing through the gap from the first side to the second side of the opening under an operating pressure differential between the first and the second side. A pump utilizing the self-aligning seal assembly is also provided.
    Type: Application
    Filed: April 30, 2009
    Publication date: November 5, 2009
    Inventor: Creigh THOMPSON
  • Publication number: 20090200749
    Abstract: A mechanical seal device having a stationary sealing ring attached in close contact to a seal cover, a rotating sealing ring having a counter seal face in close contact with the seal face, and a fixing part having a first fixed ring holding the rotating sealing ring and a second fixed ring fitting in close contact with the rotary shaft and having a bellows surrounding the rotary shaft, having one end connected with the first fixed ring, and having another end connected with the second fixed ring, one seal face of the seal face and the counter seal face having fluid introduction ports for introducing the sealed fluid to the seal face at the circumferential surface at the sealed fluid side and the other seal face having dimples, or one seal face having the fluid introduction ports and the dimples, the dimples being arranged in lines radiating from a center of the seal face.
    Type: Application
    Filed: July 23, 2007
    Publication date: August 13, 2009
    Applicant: Eagle Industry Co., Ltd.
    Inventors: Yoshihiro Teshima, Yoji Oshii, Koji Watanabe
  • Publication number: 20080018055
    Abstract: A rotary seal housing having opposing ends, a first fluid conducting slot at one of the opposing ends, a pair of spaced apart fluid conducting slots at the other opposing end, and sets of apertures connecting the first fluid conducting slot with the pair of fluid conducting slots, the housing having helical push back grooves that are arcuate in cross-section.
    Type: Application
    Filed: June 29, 2006
    Publication date: January 24, 2008
    Inventors: David T. Moldt, James E. Taylor, Sina Saylany
  • Patent number: 7314218
    Abstract: An adaptor that can be used with rotary fluid equipment will protect mechanical seals and/or packing material adjacent a seal cavity (18) of the equipment. The adaptor includes an annular body (30) with a central bore (32) adapted to receive a shaft (12) of the equipment. When used with mechanical seals the adaptor is receivable in the cavity at the entrance thereto and it has a portion which surface which effects contact with a complementary surface of the seal. When used with packing the adaptor fits within the cavity and defines an outboard extension in which the packing can be received. The bore defines two portions, one of which is close to the shaft (52) and another portion (54) which flares outwardly from the one portion towards the outboard end of the adaptor. Each bore portion has a spiral groove (56, 58) therein, which groove serves to redirect contaminant material contained in fluids surrounding the shaft away from the seal cavity.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: January 1, 2008
    Assignee: Enviroseal Engineering Products, Ltd.
    Inventor: Paul Hughes
  • Patent number: 7134491
    Abstract: The present invention provides a method for remedying minute seal leaks in downhole tools and equipment. The various embodiments of the present invention utilize pressure activated liquid sealants stored in local reservoirs to remedy such leaks.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: November 14, 2006
    Assignee: Schlumberger Technology Corporation
    Inventors: Harjit Kohli, Hebah Ahmed, Michael Johnson
  • Patent number: 7121551
    Abstract: An arrangement (120) of members for a throat bushing for rotary fluid equipment includes a first member (122) that is useful for seal cavities that contain conventional packing, and a second bushing member (132) that will be used in conjunction with the first bushing member if the seal cavity utilize a mechanical seal at the remote end of the cavity. Both bushing members (122, 132) are provided with spiral grooves (140) in a central bore thereof for the removal of contaminants from the seal cavity. The distal end face (124) of the first bushing member is contoured to receive a mating proximal end face (144) of the second bushing member or to also receive the abutting face of a packing ring or a lantern ring. The arrangement of the invention allows an operator to switch between the use of a mechanical seal or conventional packing without having to discard his primary seal cavity protector.
    Type: Grant
    Filed: June 26, 2002
    Date of Patent: October 17, 2006
    Assignee: Enviroseal Engineering Products, Ltd.
    Inventors: Aniko Dunford, legal representative, Paul Hughes, Joseph R. Dunford, deceased
  • Patent number: 6971479
    Abstract: An applicator (10) for applying a friction modifying material to the top of rails (12). The wayside applicator includes an applicator bar (26) that has a dam for holding friction modifying material.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: December 6, 2005
    Assignee: Portec Rail Products, Inc.
    Inventors: W. Thomas Urmson, Jr., John W. Mospan, Frank T. Lenco
  • Patent number: 6932351
    Abstract: A packing case for cooling compressors and other machinery is disclosed. A packing case includes an opening through which a movable machinery shaft may be inserted such that the packing case is mounted on the shaft. In an exemplary embodiment, the packing case contains at least one packing cup with channels through which a fluid coolant may flow. The channels form substantially parallel passageways along the length of the shaft that are spaced apart around the shaft circumference and series connected. The fluid coolant may be introduced through one or more inlet ports, circulate through the substantially parallel passageways of the at least one packing cup, and exit the packing case through one or more outlet ports. The fluid coolant may flow through the packing case in a single, continuous flow path or a split flow arrangement.
    Type: Grant
    Filed: February 7, 2003
    Date of Patent: August 23, 2005
    Inventor: William L. Mowll
  • Patent number: 6916022
    Abstract: A sealing assembly for extending around a rotating shaft for preventing the transmission of fluids along the shaft, in which a sealing element is biased towards the rotary sealing part; and a pusher sleeve extends between the sealing element and a housing.
    Type: Grant
    Filed: January 16, 2003
    Date of Patent: July 12, 2005
    Assignee: Dresser-Rand S.A.
    Inventor: Philippe Jacques Auber
  • Patent number: 6834862
    Abstract: A sealing system to be inserted into the seal cavity of a rotary mechanical device to provide a seal and a bearing surface to eliminate whip in a rotating shaft. The sealing system includes a split bushing element to allow easy installation over the shaft. The bushing is substantially cylindrical with an inner bore closely approximating the outer diameter of the shaft and includes a groove at the motor end on the outer surface and a corresponding groove on the inner surface to provide a lantern ring. Seal water openings are provided between the outer groove and inner groove of the bushing. Generally, two or three packing rings are added on the motor side to complete the shaft sealing system for installation in the seal cavity.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: December 28, 2004
    Inventor: Mark R. Wilkinson
  • Patent number: 6817228
    Abstract: Pumps and valves with movable parts, such as a plunger, typically have seals around the part. The seals may isolate one chamber from another to prevent leakage across the seals. The pressure in one chamber may be different from the pressure in another adjacent chamber, thereby creating a pressure differential across the seal. When the seal is working properly, the pressures in the adjacent chambers remain constant approximately. However, when a seal leaks, pressure will leak across the seal. As such, the chamber with the lower pressure will show an increase in pressure due to seal leakage. Thus, monitoring pressure changes in the chamber with low pressure, or pressure differentials between chambers, serves as an indicator for leakage across the seal and impending seal failure.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: November 16, 2004
    Assignee: Schlumberger Technology Corporation
    Inventors: Mark Upton, Joe Hubenschnmidt
  • Publication number: 20040212154
    Abstract: A subject for the invention is to provide a method of transferring a polymerizable liquid by which the polymerizable liquid can be stably transferred without arousing any mechanical-seal trouble over long.
    Type: Application
    Filed: May 20, 2004
    Publication date: October 28, 2004
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Shuhei Yada, Masayasu Goriki, Yoshihiro Shimizu
  • Patent number: 6796324
    Abstract: A fugitive emission collection device for acquiring an atmosphere sample around a seal is provided. The emission collection device has a rigid member that forms a low impedance cavity shaped to overlay a seal. The emission collection device has a conduit with an inlet in fluid communications with the low impedance cavity and an outlet that can be connected to a chemical sensing system to analyze the atmosphere sample for emissions leaking from the seal.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: September 28, 2004
    Assignee: Fisher Controls International, LLC
    Inventors: John Patrick Dilger, Jerry Marvin Ceaser
  • Publication number: 20040160013
    Abstract: A rotary fluid pressure device (11) having a housing (13,31), inlet and outlet ports (21,23), a gerotor gear set (15), a valve member (51) and an input-output shaft (49). A seal assembly (73) is disposed radially between the shaft (49) and the housing (31). The seal assembly comprises, in the order of leakage flow from a case drain region (63), a high pressure shaft seal (77), an annular chamber (71) in which is disposed a rigid back-up member (79;91) for the seal (77), a drain passage (81) communicating from the annular chamber (71) to a case drain port (47), and a low pressure shaft seal (83). The back-up member (79;91) may cooperate with either the housing (31) or the seal (77) or the input-output shaft (49) to define fluid passage means (87,89;93,95), so that any leakage flow past the high pressure shaft seal (77) flows through the drain passage (81) to the case drain port (47).
    Type: Application
    Filed: February 12, 2004
    Publication date: August 19, 2004
    Inventors: James M. LeClair, Jarett D. Millar, Andrew T. Miller
  • Patent number: 6698764
    Abstract: The invention provides a packing assembly for rotating and/or oscillating machine shafts arranged in a machine housing. The packing assembly comprises a packing accommodation unit floating on said shaft. The packing accomodation unit is supported on the housing by means of a ball joint assembly that is pivotable and translatory movable in a radial direction to and from the shaft. The ball joint assembly comprises a ball member provided with a central bore received in a ball socket. A guiding element projecting into the bore of the ball member serves for translatory guiding the ball member along the axis of the bore in the ball member, whereby the axis of the bore on the ball member runs essentially perpendicular to the central longitudinal axis of the shaft.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: March 2, 2004
    Assignee: Coperion Buss AG
    Inventors: Peter Franz, Bernd Roese
  • Publication number: 20030227140
    Abstract: A rotary fluid pressure device (11) having a housing (13,31), inlet and outlet ports (21,23), a gerotor gear set (15), a valve member (51) and an input-output shaft (49). A seal assembly (73) is disposed radially between the shaft (49) and the housing (31). The seal assembly comprises, in the order of leakage flow from a case drain region (63), a high pressure shaft seal (77), an annular chamber (71) in which is disposed a rigid back-up member (79) for the seal (77), a drain passage (81) communicating from the annular chamber (71) to a case drain port (47), and a low pressure shaft seal (83). The back-up member (79) may cooperate with either the housing (31) or the seal (77) to define radial fluid passage means (87,89), so that any leakage flow past the high pressure shaft seal (77) flow to the case drain port (47).
    Type: Application
    Filed: June 11, 2002
    Publication date: December 11, 2003
    Applicant: EATON CORPORATION
    Inventors: James M. LeClair, Jarett D. Millar, Andrew T. Miller
  • Patent number: 6641140
    Abstract: An apparatus for retaining lubrication oil at the sliding surface of a double-type shaft seal device disposed within an oil chamber of a submersible pump. The apparatus prevents lubrication oil from scattering from the center portion of the oil chamber of the submersible pump toward the circumferential wall, and prevents entrapment of air into the lubrication oil through formation of an oil film in the oil outlet, irrespective of variation in rotational speed of the pump shaft, so that the seal apparatus is lubricated and cooled effectively.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: November 4, 2003
    Assignee: Tsurumi Manufacturing Co., Ltd.
    Inventors: Satoshi Matsumoto, Minoru Murai
  • Patent number: 6601854
    Abstract: A shaft seal in which a rotary dealing part is mounted coaxially with a sealing element and forms therewith a primary seal between opposed faces of the sealing element and the rotary sealing part to substantially prevent fluid flow across the primary seal from a high pressure radial side to a low-pressure radial side. Secondary and tertiary seals are also provided between the high-pressure and low-pressure radial sides; and between an auxiliary sleeve and the seal housing, respectively.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: August 5, 2003
    Assignee: Dresser-Rand S.A.
    Inventor: Philippe Jacques Auber
  • Patent number: 6578850
    Abstract: A dynamic seal for a drive shaft including a seal housing with at least one inlet for injecting a fluid, (i.e., a liquid or gas) into the seal. The seal also has an expeller device, such as an expeller ring mounted on the drive shaft, for expelling the injected fluid along the drive shaft in the direction of the casing. In addition, the seal may employ sealing rings positioned to prevent the injected fluid from escaping the seal in a direction other than along the shaft toward the casing, such as a glass-filled PTFE ring positioned proximal to the expeller device and a seal adjuster for compressing a graphite-yarn packing ring against the glass-filled PTFE seal ring. Further, the seal may additionally or alternately include a fitted sleeve covering the drive shaft to protect the shaft from wear and corrosion.
    Type: Grant
    Filed: November 14, 2000
    Date of Patent: June 17, 2003
    Assignee: General Electric Company
    Inventor: John A. Rothlisberger
  • Patent number: 6234490
    Abstract: A mechanical packing braided such that a number of angled recesses or projections at predetermined intervals are formed in the surface of the braid adjacent a rotating shaft, the recesses or projections causing a deflecting hydrodynamic force on the fluid film between the packing and shaft such that leakage of the fluid from under the packing set is reduced when compared to normally braided packing under the same conditions. When constructed from yarns suitable for very low seal water requirements, the rejective “pumpback” force on the fluid film is sufficient to reduce the leakage of seal water to zero so that exfoliated graphite packing which normally has a 95% reliability when running dry can be given a 99.5% reliability. In one troublesome scenario, th subject packing operates to stop leakage due to pressure surges so that water which would ordinarily leak out even with the use of yarns having exfoliated graphite fibers is contained.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: May 22, 2001
    Inventor: George B. Champlin
  • Patent number: 5979483
    Abstract: Disclosed is a valve assembly having a slidable valve stem that passes through a bushing enclosed in a bonnet. At least one circumferential stem seal seals the valve stem to the bushing. At least one passageway is provided through the bushing for injecting a fluid between the valve stem and the bushing to wash out deposits. A second optional passageway is also provided for injecting a lubricant around the valve stem.
    Type: Grant
    Filed: June 24, 1998
    Date of Patent: November 9, 1999
    Assignee: Occidental Chemical Corporation
    Inventor: Ricky Zapalac
  • Patent number: 5921554
    Abstract: An anti-pack out seal for use between fluid containing cylinders and pistons which are axially slideable therein and which extend through an opening in the end of such pistons. This seal has an annular channel adjacent to a resilient elastomeric seal ring, through which channel, an air stream containing an oil mist is circulated to remove solid particles of material which may separate or pack out from the fluid in the cylinder and in addition to prevent curing of the solid particles between the cylinder, the elastomeric seal and the bearing surrounding the cylinder.
    Type: Grant
    Filed: July 11, 1997
    Date of Patent: July 13, 1999
    Assignee: Nordson Corporation
    Inventors: Gary A. Derian, Michael W. Fleming, Cuong C. Tran
  • Patent number: 5873575
    Abstract: A packing case member or packing cup for use in a package of other similar cups for mounting on a reciprocally or rotatably movable machinery shaft to prevent gas leakage along the shaft is disclosed. The member includes a circular central opening for the shaft and provision for a conventional seal ring which slidably bears against the shaft as the shaft moves through the member. A fluid coolant passageway is formed in the member so as to extend around a majority peripheral portion of the central opening between inlet and outlet ports located at opposite end portions of the passageway. The passageway is characterized by at least three straight line segments which successively intersect one another at various angular positions around the central opening. Each straight line segment is accessible through a peripheral access opening which communicates with one end thereof for ease of cleaning debris clogging the passageway.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: February 23, 1999
    Assignee: Delaware Capital Formation, Inc.
    Inventor: Paul C. Hanlon