Circumferential Contact Seal For Other Than Piston Patents (Class 277/500)
  • Patent number: 7549836
    Abstract: A bearing seal assembly includes a pair segmented circumferential or a carbon ring seals to contain oil in the bearing compartments of a gas turbine engine or other mechanical device. The pair of seals, an oil-side seal and an air-side seal, are axially-spaced between the oil and the air in the housing. Air at an elevated pressure is introduced between the seals. This elevated air pressure urges the seals axially apart from one another and radially inward to improve the seal. A backup seal is provided adjacent either the oil-side seal or the air-side seal. In the event of failure of either the oil-side seal or the air-side seal which results in the loss of air pressure, the backup seal will provide at least a minimum level of seal between the oil compartment and the air in the housing.
    Type: Grant
    Filed: September 20, 2006
    Date of Patent: June 23, 2009
    Assignee: United Technologies Corporation
    Inventors: James H. Anderson, Harrison R. Picard
  • Patent number: 7543822
    Abstract: A composite seal assembly for providing a seal between a rotating shaft and a static surface. The composite seal assembly includes first and second axially adjacent annular seal elements. The first and second seal elements each include a sealing edge contacting the shaft to provide a respective seal between the first and second seal element and the shaft. A static housing receives the first and second seal elements and engages the static surface to provide a static stationary seal, while concomitantly providing a flex region that engages the seal elements to form a dynamic seal therewith.
    Type: Grant
    Filed: July 12, 2004
    Date of Patent: June 9, 2009
    Assignee: A.W. Chesterton Company
    Inventors: Michael P. Grimanis, Joseph K. Kaleshian
  • Publication number: 20090045587
    Abstract: A wiper seal subassembly for disposal in rotor vanes or stator lobes of a vane-type camshaft phaser comprises a backing spring and a sealing element. The sealing element includes spring retention features that loosely retain the backing spring and that are integrally molded into the sealing element. The spring retention features include undercut retention features, such as an overhanging edge, that prevent the backing spring from vertically detaching from the sealing element. The spring retention features further include sidewall tabs that prevent the backing spring from horizontally detaching from the sealing element. The sealing element is formed from a plastic composite material during an injection molding process using a simple injection mold tooling design. The single-piece wiper seal subassembly is provided at the tip of each rotor vane and/or stator lobe of a vane-type camshaft phaser for varying the timing of combustion valves in an internal combustion engine.
    Type: Application
    Filed: August 16, 2007
    Publication date: February 19, 2009
    Inventors: Gary J. DeAngelis, David J. Ranelli, Amanda M. Weiss
  • Patent number: 7478981
    Abstract: Disclosed herein is a contamination protection apparatus that includes a concealed linear glandular seal for providing continuous protection along an entire length of a movable table of a precision apparatus such as testing and metrology machines, laser machines, biomedical equipment, and precision fabricating machines. The disclosed glandular seal is formed on an inner structure of the protective apparatus, which includes a plurality of mechanical translation stages positioned in the inner structure and two normally closed linear parts of the glandular seal attached to respective mechanical translation stages. The linear parts interfere with each other and are opened by movement of a mechanical translation stage saddle.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: January 20, 2009
    Assignee: Nutec Components Inc.
    Inventors: Rene H. Schnetzler, Young A. Yoon
  • Publication number: 20090014678
    Abstract: This invention relates to the use of elastomers with the sealing element of reciprocating gas compressor valves to increase the reliability of the gas tight seal within the reciprocating gas compressor valve and to increase the useful life of reciprocating gas compressor valve. The elastomeric material is either used as a coating layer on the sealing element of the reciprocating gas compressor valve, or as the entire sealing element. The elastomeric material acts as a cushion to reduce the wear on the sealing element, provides a superior gas tight seal, and is more tolerant of entrained dirt or liquids in the gas stream thereby increasing the operable life of the reciprocating gas compressor valve. Reducing the mean time between reciprocating gas compressor valve failures results in longer reciprocating gas compressor run times for the user, increased revenue generation for the user and safer operation of said equipment.
    Type: Application
    Filed: June 6, 2008
    Publication date: January 15, 2009
    Inventor: Kevin Patrick Durham
  • Publication number: 20080303218
    Abstract: Systems and methods associated with a fluid-activated shaft seal are provided. The systems, which feature multiple components, include a support component defining an exterior surface, a carrier component including an interior surface to slideably engage the exterior surface of the support component, and a seal disposed relative to the carrier component. The seal includes a lip portion and a fluid-responsive gel material that expands when exposed to a fluid to urge the lip portion towards or into contact with a shaft. The gel material contracts in the absence of the fluid to form or increase the size of a gap between the shaft and the lip portion. Methods of assembling and installing such a system are also described.
    Type: Application
    Filed: June 6, 2008
    Publication date: December 11, 2008
    Applicant: Mide Technology Corporation
    Inventors: Marthinus van Schoor, David Gilbert, Andrew Cutler, Steven Klepper
  • Publication number: 20080271968
    Abstract: A sealing arrangement for a pressurizing-agent-operable control device of a clutch arrangement, for sealing a chamber which is pressurizable with a pressurizing agent, assigned to the clutch arrangement, from the interior space of the clutch arrangement; comprising at least one elastic sealing device. The sealing device is guided on at least one sheet metal element, which is attached to an element that delimits the chamber which is pressurizable with a pressurizing agent. A double clutch arrangement having a sealing arrangement.
    Type: Application
    Filed: May 2, 2008
    Publication date: November 6, 2008
    Applicant: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Manuel Metzinger, Ivo Agner, Oliver Noehl
  • Publication number: 20080257797
    Abstract: A motorized paddle assembly for a material sorter is presented. The motorized paddle assembly comprises a paddle, internal mechanisms, and a housing that encloses the internal mechanisms. The paddle is attached to a circular hinge to enable the circular hinge and the paddle to rotate about an axis. The motorized paddle assembly includes an upper plate for the circular hinge. The upper plate allows the free rotation of the circular hinge while substantially preventing unwanted material from falling behind the circular hinge. In a series of adjacent motorized paddle assemblies, a gasket is mounted between adjacent motorized paddle assemblies to substantially prevent unwanted material from falling between the adjacent motorized paddle assemblies.
    Type: Application
    Filed: April 18, 2008
    Publication date: October 23, 2008
    Inventors: Gregory Nowak, Christopher Cedzo
  • Publication number: 20080246226
    Abstract: The invention is directed to developing for the high sealing capacity of the Shaftseals by means of applying elastic cylinder of which both inside and outside surfaces are either inclined or plain to be fixed on the opening of the housing in being compressed onto the surface of the rotating shafts at the inside rubber cylinder.
    Type: Application
    Filed: April 9, 2007
    Publication date: October 9, 2008
    Inventor: Yoshioki Tomoyasu
  • Publication number: 20080240963
    Abstract: A rotor shaft sealing structure of an oil-free rotary compressor is provided, with which is reduced a risk of occurrence of lubrication oil intrusion into the compression chamber (9) of the compressor which is liable to occur when negative pressure is produced in the compression chamber (9). The rotor shaft sealing structure is composed such that two shaft seal means (20, 30) are provided in the rotor casing (1) between the oil lubricated bearing (10, 10?) and the compression chamber (9) such that an annular airspace (24) is formed between the two shaft seal means (20,31), at least one communicating hole (34,34?) is provided to communicate the annular airspace (24) to the outside of the rotor casing (1), and the annular airspace (24) of the male rotor shaft (6) sealing part and the annular airspace (24) of the female rotor shaft (7) sealing part are connected by a between-rotor shaft communication passage (35).
    Type: Application
    Filed: March 31, 2008
    Publication date: October 2, 2008
    Applicant: ANEST IWATA CORPORATION
    Inventors: Hideyuki KIMURA, Masami MUTO
  • Publication number: 20080191474
    Abstract: A joint comprises first and second components and a tri-lobed O-ring seal establishing a sealed connection between the first and second components.
    Type: Application
    Filed: December 21, 2007
    Publication date: August 14, 2008
    Inventor: George J. Kotz
  • Publication number: 20080164658
    Abstract: A slider seal assembly for a gas turbine engine includes a housing, a seal plate moveable relative to the housing and a retaining ring. The housing includes an outer surface, an inner surface, and a recessed opening between the outer surface and the inner surface. The seal plate is received within the recessed opening. The inner surface of the housing includes a curved portion which is curved in an outward direction toward the outer surface.
    Type: Application
    Filed: January 10, 2007
    Publication date: July 10, 2008
    Inventor: Logan H. Do
  • Publication number: 20080163842
    Abstract: The present invention relates to a starter arrangement for an internal combustion engine. The starter arrangement has a starter motor (1) having a pinion gear (2) at an output shaft. The pinion gear (2) is arranged in constant engagement with a corresponding crank gear of a crank wheel (3) located between an engine block (4) and a flywheel (11) of the engine. The crank wheel (3) is operatively connected to a crankshaft of the engine via a one-way clutch (6). The one-way clutch (6) is arranged at an engine block (4) side of a crankshaft oil seal (7) enabling lubrication and cooling thereof by an engine oil of the engine.
    Type: Application
    Filed: September 27, 2007
    Publication date: July 10, 2008
    Inventors: Jonas Forssell, Peter Ulrik Gast, Lars Johan Stenvall, Petter Almhagen
  • Patent number: 7396019
    Abstract: A valve gasket for sealing a fluid dispenser device comprising a valve, in particular a metering valve, mounted on a fluid reservoir, said gasket being characterized in that it comprises an alloy of vulcanized ethylene vinyl acetate (EVA) and/or of butyl (IIR) or of vulcanized halobutyl (CIIR or BIIR) with one or more materials selected from the group constituted by polyoctene ethylene (POE), ethylene propylene (EP), ethylene propylene diene monomer (EPDM) and chloroprene rubber (CR), all of these materials being vulcanized.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: July 8, 2008
    Assignee: Valois S.A.S
    Inventors: Sandrine Barranco, Patrice Leone
  • Patent number: 7389991
    Abstract: A leakage seal for use in a gas path between two relatively rotatable members of a gas turbine comprises a foil layer and a cloth layer. The foil layer has two expansive surfaces, a single one of which is covered by the cloth layer. The leakage seal has a proximal end, a distal end, and a generally flat region between the proximal and distal ends. The proximal end is attached to an associated one of the turbine members. The distal end diverges from the generally flat region so as to define a curved hook, along which the cloth portion is wrapped over the foil layer, when the distal end is viewed in cross-section.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: June 24, 2008
    Assignee: Turbine Services, Ltd.
    Inventors: Vincent T. Riggi, Jr., Ronald A. Riggi
  • 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
  • Publication number: 20070296161
    Abstract: A seal for sealing a movable member from a chamber containing a fluid includes a tube having various shapes. The seal is configured to seat in a gland around a movable member. In beneficial embodiments the seal has a tapered shape so that the top portion does not fill the entire gland. The seal can be made of compressed graphite ribbon that has a greater density at the top than then bottom. A die for making the seal in the tapered shape and with a decreasing density gradient is described. A method for making the seal with a die is also described.
    Type: Application
    Filed: June 21, 2006
    Publication date: December 27, 2007
    Inventor: Richard L. Dudman
  • Publication number: 20070164517
    Abstract: A flexible seal ring includes a first sealing face and a rear face is disposed opposite the front sealing face, the rear face is axially offset relative to the front sealing face. An upper face disposed between the front face and the rear face, the upper face extending from the rear face towards the front face such that an interior angle between the upper face and the rear face is greater than 110 degrees. Another flexible seal ring includes a first front sealing face, a rear face, at least one downwardly disposed upper face disposed between the front face and the rear face, at least one downwardly disposed lower face, and a second front sealing face disposed between the downwardly disposed lower face and the first front sealing face. A cartridge seal includes a flexible seal ring and an upper retaining ring.
    Type: Application
    Filed: November 17, 2006
    Publication date: July 19, 2007
    Inventor: Brian J. Caprera
  • Patent number: 7217036
    Abstract: In a seal-type rolling bearing, between an inner ring and an outer ring, contact-type seal plates are respectively interposed on the counter-water-drenchable side and on the water-drenchable side. On the counter-water-drenchable side, a seal plate including, in the lip leading end portion thereof, an air hole for controlling the internal and external pressures of the bearing is disposed. On the water-drenchable side, a seal plate without air hole is disposed.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: May 15, 2007
    Assignee: NSK Ltd.
    Inventors: Hiroshi Ishiguro, Toshihisa Ohata, Yasuhiro Hirayama
  • Patent number: 7168147
    Abstract: A method of forming a seal for a subterranean drilling tool employs irradiation. The seal is formed of a single homogeneous elastomeric material. The seal has an exterior surface with at least one portion that is in sliding engagement with part of a seal gland of the drilling tool. A property gradient is formed in the elastomeric material on at least this portion. The property gradient is formed by exposing the seal to an environment to define a property that changes from a first level to a second level without essentially changing the composition of the elastomeric material. The step of exposing is done by irradiating the seal with an electron beam.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: January 30, 2007
    Assignee: Baker Hughes Incorporated
    Inventors: Redd H. Smith, Terry J. Koltermann, Jiri George Drobny
  • Patent number: 7140616
    Abstract: The invention relates to a sealing device which is provided with an annular circumferential groove in a preceding sealing washer and having a sealing body disposed in the groove. The width and depth of the groove are larger than the cross-section of the sealing body so that the sealing body can be axially moved in the groove and may be forced against the wall of the groove and the tool shank by inner pressure provided, for example, by a coolant.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: November 28, 2006
    Assignee: Rego-Fix AG
    Inventor: Ernst Gerber
  • Patent number: 7125018
    Abstract: A low-friction seal comprising a quasi dimensionally stable sealing ring (44) that is accommodated with radial and axial clearance in a groove (30; 76) of one of two surface, whereby said surfaces are sealed off from each other and can move in a relative position to each other, and the peripheral section of the sealing ring protruding from the groove (30? 76) is placed opposite the other surface that is to be sealed. Means are provided between the side wall (34; 80, 82) of the groove on the side of the pressure-chamber and the sealing ring (44) in order to prevent pressure from spreading to the bottom (37, 78) of the groove, whereby radial deformation of the sealing ring in the direction of the surface that is to be sealed is avoided.
    Type: Grant
    Filed: July 9, 2003
    Date of Patent: October 24, 2006
    Assignee: Herbert Hanchen GmbH & Co. KG
    Inventors: Herbert Busse, Hans-Dieter Fabrowsky
  • Patent number: 7121553
    Abstract: A bushing for a hydraulic valve has a bushing wall having openings allowing passage of a hydraulic medium to and from an interior of the bushing. The openings have an opening wall that at least across a portion of a circumference of the opening wall is formed as a molded bevel. The molded bevel is positioned at an acute angle to a radial plane of the bushing wall. The bushing wall has outer annular channels and the openings open into the outer annular channels, respectively.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: October 17, 2006
    Assignee: Hydraulik-Ring GmbH
    Inventors: Marius Cornea, Bernd Weigand
  • Patent number: 7066719
    Abstract: An exemplary bore for a shaft of a turbomachine includes a longitudinal axis extending generally from an inner end to an outer end of the bore, an outer seat disposed proximate to the outer end of the bore at an outer seat radius for an outer seal ring wherein the outer seat comprises an inner end, an outer end, a step at the inner end extending radially inward to a step radius, and a chamfer at the outer end extending radially inward over an outward axial distance to a chamfer plateau radius and an inner seat disposed inward the outer seat at an inner seat radius for an inner seal ring wherein the outer seat radius exceeds the inner seat radius. Various other exemplary devices, systems, methods, etc., are also disclosed.
    Type: Grant
    Filed: July 3, 2004
    Date of Patent: June 27, 2006
    Assignee: Honeywell International, Inc.
    Inventor: Scott Grover Aguilar
  • Patent number: 6945535
    Abstract: A seal, especially for shafts movable in a translational direction, has at least one static sealing area and at least one dynamic sealing area and another sealing point outside of the dynamic sealing area. The other sealing point is formed by at least two elements functionally connected to each other, one of which at least one is stationary and at least one other is movable, following a shaft stroke.
    Type: Grant
    Filed: February 13, 2003
    Date of Patent: September 20, 2005
    Assignee: Federal-Mogul Sealing Systems Bretten GmbH
    Inventor: John Kapcoe
  • Patent number: 6913266
    Abstract: A sealing device for a shaft (2) or rod which is movably disposed in a guide arranged between a high-pressure space (10) and a low-pressure area (11) of a pressure-resistant housing (1) bounding the high-pressure space (10), and which is surrounded by a sealing ring (3), is further developed such that the sealing ring (3) is partially deformed by means of a deformable pressure ring (4) supported under pressure at the outer circumference and circumferentially rests against the shaft (2) or the rod or almost rests against the shaft (2) or the rod.
    Type: Grant
    Filed: April 3, 2003
    Date of Patent: July 5, 2005
    Assignee: Hammelmann Maschinenfabrik GmbH
    Inventors: Michael Jarchau, Egbert Helmig, Burkhard Helmig
  • Patent number: 6871858
    Abstract: A shaft sealing apparatus is provided which can easily be assembled and arranged to prevent leakage of a dope from an acetylator or the like system. A screw sleeve having a spiral groove provided in the outer side thereof is mounted on rotary shaft adjacent to a location where the rotary shaft extends through a housing. As the screw sleeve rotates together with the rotary shaft, it can return back the dope into the housing thus providing a sealing effect. The screw sleeve includes six segments fabricated by separating circumferentially into two and axially into three. The six segments are jointed together to assemble a generally cylindrical structure on the rotary shaft. The assembling process can be conducted from two radial directions on the rotary shaft between the housing and each bearing unit supporting the rotary shaft without disassembling the bearing units.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: March 29, 2005
    Assignee: Daicel Chemical Industries, Ltd.
    Inventor: Masanori Futai
  • Patent number: 6863661
    Abstract: An endoscope seal that effectively inhibits the egress of fluids from the working channel of an endoscope when an elongate device having a non-circular shaft is disposed therein. The endoscope seal includes a body portion having a proximal end adapted for insertion of an elongate device such as a rapid exchange biliary catheter, a distal end adapted for connection to the proximal end of an endoscope, a lumen extending therethrough which is adapted to receive the elongate device and to provide access to the working channel of the endoscope, and a means for conforming to the non-circular shaft of the elongate device to inhibit the flow of fluid from the working channel of the endoscope. The conforming means may, for example, comprise one or more protrusions extending radially inward in the lumen of the body portion, a sealing material such as a surgical foam that is disposed in the lumen of the body portion, or a sealing mandrel.
    Type: Grant
    Filed: May 28, 2003
    Date of Patent: March 8, 2005
    Assignee: SciMed Life Systems, Inc.
    Inventors: Oscar R. Carrillo, Jr., John Holmes, Kevin Richardson
  • Publication number: 20040256811
    Abstract: A seal for a high-pressure pumping system includes an energizing component having an aperture extending therethrough, and a seal jacket component. The seal jacket component includes a base and a flared membrane extending from an inner perimeter of the base, the flared membrane extending through the aperture, encircling the energizing component and overlapping a portion of the base to isolate the energizing component from fluid of the pumping system. The flared membrane may include a forward face substantially perpendicular to the aperture and a circumferential frontal lip extending forwardly beyond the forward face. The forward face may include a thinned-wall section facilitating the transmission of an axial force therethrough and against the energizing component. The seal jacket further may include a support lip extending forwardly from an outer perimeter of the base to properly seat the energizing component against the base.
    Type: Application
    Filed: May 18, 2004
    Publication date: December 23, 2004
    Inventor: George N. Proper
  • Publication number: 20040245727
    Abstract: A seal balancing arrangement for a rotating or reciprocating shaft used in a high pressure and/or high velocity environment includes a plurality of grease balancing chambers each bordered by a pair of seals and filled with extreme pressure grease. The grease is compressed between the additional grease chambers by the movement of the first seal due to pressure acting on this seal by system internal pressures, thereby reducing pressure on the first seal while distributing the pressure between the remaining seals. The balancing chambers are arranged such that the grease in between the seals can be replenished through ports provided in a supporting housing, thereby extending the life of the seal assembly by allowing grease to lubricate the seal faces by extruding grease from each grease chamber.
    Type: Application
    Filed: June 6, 2003
    Publication date: December 9, 2004
    Inventor: Jack Bunn
  • Publication number: 20040232624
    Abstract: An object of the present invention is to reduce the workload at the installation site even when the sealing material is in the form of a band. The sealing material that achieves the aforementioned object is a closed annular sealing material, wherein the ends in the peripheral direction of one or a plurality of expanded porous polytetrafluoroethylene bands are joined to each other. The width (W) of the sealing material from the inner periphery to the outer periphery is greater than the thickness (t) of the outer peripheral surface thereof; and the angle of elevation of the annular portion of the sealing material in relation to the horizontal plane formed by the edge of the inner peripheral surface thereof is 0 to 45° or 0°.
    Type: Application
    Filed: March 11, 2004
    Publication date: November 25, 2004
    Inventors: Hirokazu Hisano, Masayuki Aso
  • Publication number: 20040229703
    Abstract: A slip joint includes first and second shafts that are connected for concurrent rotational movement and for relative axial movement, such as by respective pluralities of axially extending splines. A seal can is secured to the first shaft and extends about a portion of the second shaft. A seal assembly is secured to the second shaft and engages a portion of the seal can. The seal assembly includes first and second seals that are each generally concave in shape. Each of the first and second seals is generally V-shaped in cross section, having a radially innermost end, an intermediate portion, and a radially outermost end, wherein the radially innermost and outermost ends are located closer to one another than the radially intermediate portions. the first and second seals are axially spaced apart from one another so as to define an annular space therebetween that can be filled with a sealing material, such as a waterproof grease.
    Type: Application
    Filed: May 13, 2003
    Publication date: November 18, 2004
    Inventors: Robert N. Jackson, Philip A. Eversole
  • Publication number: 20040201177
    Abstract: An air cylinder has a piston, an inner tube, an outer tube, a cylinder tank, a control valve, an O-ring, a bearing, and an oil seal. The inner tube is inserted in the outer tube. The outer tube is inserted through the cylinder tank. The control valve is disposed on a top end of the inner tube. The bearing is disposed on a bottom of the inner tube. The O-ring encloses the control valve. The oil seal encloses the bearing. A first sealing device is disposed between the outer tube and the control valve to separate the O-ring and the outer tube, and a second sealing device is disposed between the outer tube and the oil seal.
    Type: Application
    Filed: April 9, 2003
    Publication date: October 14, 2004
    Inventor: Shan-Ping Huang
  • Publication number: 20040173972
    Abstract: A ferrofluid seal apparatus incorporating a multi-stage ferrofluid rotary seal adapted to provide a ferrofluid pressure-type seal about a shaft element extending between a first environment and a second environment, a first magnetic fluid disposed at one stage of the multi-stage rotary seal that faces the first environment, and a second magnetic fluid disposed at another stage of the multi-stage rotary seal that faces the second environment.
    Type: Application
    Filed: March 6, 2003
    Publication date: September 9, 2004
    Inventors: Zhixin Li, Kuldip Raj
  • Patent number: 6783129
    Abstract: A seal device (31) for a bearing system (21) is constituted by first and second seal rings (32) and (35). The first seal ring (32) is constituted by a lip seal (33) having a lip portion (33B) in sliding contact with an end face (23B) of a bush (23) which is fitted on a joint shaft (26), and a slide tube (34) having a seal surface (34C) on an end face at an axial end away from the lip portion (33B) which is formed integrally with a tubular body portion (33A) of the lip seal (33). The second seal ring (35) is fixedly fitted in a boss (22) radially on the outer side of the first seal ring (32), and provided with a seal surface (35D) on the inner side of an annular inward collar portion (35C) for sliding contact with the seal surface (34C) of the slide tube (34).
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: August 31, 2004
    Assignees: Hitachi Construction Machinery Co., Ltd., Nippon Valqua Industries, Ltd.
    Inventors: Hideki Akita, Ryohei Suzuki, Osamu Gokita, Tatsuo Takamure, Hiromasa Muraki, Noriyuki Ando
  • Patent number: 6776419
    Abstract: A seal for a reciprocating plunger is formed of a hard polyimide plastic, rather than the relatively soft elastomers of earlier seals. The present seal has a conical section, with the tapered face fitting closely within the mating conical face of a hard metal retainer. An O-ring resides in a groove within the seal to provide low pressure sealing between the plastic seal and the metal retainer. The tapers of the seal and retainer urge the seal inwardly toward the plunger by operational pressures, thereby providing a better seal. The present seal provides greatly extended life over softer prior art seals, and will generally last for the life of the pump or other mechanism in which it is installed. Yet, the plastic material allows some flow under high pressures, allowing the seal to conform closely to the plunger surface during operation and throughout the life of the seal.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: August 17, 2004
    Inventor: Gregory S. Antoun
  • Publication number: 20040150168
    Abstract: A one-piece, circular, power end seal for use in sealing gear boxes of heavy-duty reciprocating pumps. The power end seal generally includes a u-shaped, circular seal body having an open channel, a plurality of ribs tangentially mounted within the channel and a ring-shaped, fiber-filled dynamic seal being formed within an inner diameter wear surface of the seal body. The ribs generally provide the seal body with improved flexibility to maintain a constant and effective seal around connecting rods within the gear box, while at the same time retaining sufficient resilience to maintain static interference in a packing gland within the gear box. The inner diameter dynamic seal can be filled with PTFE, bronze filled PTFE, carbon filled PTFE or aramid fiber filled HNBR, which reduces heat build up and seal wear, while minimizing the radial squeeze of the seal in contact with the circumference of the connecting rod.
    Type: Application
    Filed: January 20, 2004
    Publication date: August 5, 2004
    Inventors: Joe William Heathcott, Martha L. Heathcott, Chris MacKelvey
  • Publication number: 20040150167
    Abstract: A neck seal is disclosed for use in an oil film bearing assembly for a roll in a rolling mill, the roll having a neck with an intermediate tapered section leading to a reduced diameter end section contained within a sleeve, with the sleeve being fixed in relation to the roll neck and being journalled for rotation in a bushing fixed within a chock. The neck seal is adapted to be mounted on the tapered section of the roll neck for rotation therewith at a location surrounded by a seal end plate fixed to the chock. The neck seal comprises a flexible circular body having axially spaced radially outwardly projecting first and second flanges configured and dimensioned to sealingly contact the seal end plate. First and second axially spaced ridges projecting radially inwardly from the circular body for contact with the tapered section of the roll neck.
    Type: Application
    Filed: January 31, 2003
    Publication date: August 5, 2004
    Inventors: Armando S. Martins, Peter N. Osgood, Earl S. Winslow
  • Publication number: 20040130332
    Abstract: A sliding plug for working on and testing pipes is presented. The sliding plug includes a center portion and a gasket disposed about the central portion. When towed through the pipe, the sliding plug maintains a substantial seal against water flowing through the pipe. In some embodiments, a flexible gasket can be utilized to allow for substantial sealing while the sliding plug is traversing obstacles in the pipe. The sliding plug according to the present invention can be utilized in pipes where conventional plugs are inconvenient. For example, in FELL testing a sewage line, a sliding plug can be attached to a sonde cable and the testing can proceed without plugging and surcharging the section of pipe to be tested. In some embodiments, the sonde can include a pressure transducer which may be monitored to indicate that there is a sufficient water level at the sonde and, in some embodiments, to indicate a leak in the pipe by a drop in the water pressure.
    Type: Application
    Filed: November 27, 2002
    Publication date: July 8, 2004
    Inventor: Robert Jackson Harris
  • Publication number: 20040119243
    Abstract: A shaft sealing apparatus is provided which can easily be assembled and arranged to prevent leakage of a dope from an acetylator or the like system.
    Type: Application
    Filed: October 15, 2001
    Publication date: June 24, 2004
    Inventor: Masanori Futai
  • Patent number: 6742782
    Abstract: A seal of non-hermetic design for installation between two components which can move relative to one another, includes a multiplicity of flexurally elastic sealing elements which each have an end connected fixedly to a seal-bearing device and a free, angled end with the point directed toward the surface of the one component, the seal-bearing device being connected fixedly to the other component and supporting the angled ends of the sealing elements at least on one side. The sealing elements are designed as thin-walled, angled spring leaves and are arranged parallel next to one another and in at least two layers one above the other with alternate overlapping.
    Type: Grant
    Filed: April 3, 2001
    Date of Patent: June 1, 2004
    Assignee: MTU Aero Engines GmbH
    Inventor: Stefan Beichl
  • Publication number: 20040100038
    Abstract: A high-pressure pumping system including an energizing seal component having an aperture extending therethrough and a seal jacket component having a base and a toroidally-shaped flared membrane extending from the base. The body and the flared membrane are monolithically formed of an inert polymeric seal material. The flared membrane extends through the aperture and encircles the energizing seal component to isolate the energizing seal component from fluid of the pumping system. The flared membrane may extend axially from the body and encircle the energizing seal component. The flared membrane may encircle the energizing seal component and overlaps a portion of the base. The seal jacket component may be formed around the energizing seal component. The seal jacket component may include a flange extending radially outwardly from the base.
    Type: Application
    Filed: November 22, 2002
    Publication date: May 27, 2004
    Inventor: George N. Proper
  • Publication number: 20040100037
    Abstract: A hermetic seal (10) for a limited rotation device (12) includes a plurality of vertical convolutes (18) bonded to a device housing (16) at their respective first ends (19). At their respective second ends (21), plurality of the vertical convolutes (18) are bonded to a plurality of horizontal convolutes (20). The plurality of horizontal convolutes (20) are bonded to a device shaft (14) at an end opposite of the plurality of vertical convolutes (18). The plurality of vertical convolutes (18) stretch in order to provide limited rotation and the horizontal convolutes (20) expand or contract to accommodate length changes of the plurality of vertical convolutes (18). The hermetic seal (10) permits limited rotation while defining a barrier (26) and preventing viscous fluid leakage to an external environment.
    Type: Application
    Filed: November 22, 2002
    Publication date: May 27, 2004
    Inventors: Dale T. Ruebsamen, Steve L. Hadden, Toren S. Davis
  • Publication number: 20040084851
    Abstract: In a high-pressure cylinder with an axial plunger, a seal assembly for scaling the gap between the cylinder wall and the plunger. The assembly is disposed in an annual recess in the wall having an open end and a bottom opposite thereto, and comprises a plunger-sealing ring, a cylinder-sealing ring, a resilient low-pressure ring, and an annual seal holder. The seal holder urges the plunger-sealing ring against the cylinder-sealing ring and the low-pressure ring, and urges the latter two rings against the recess bottom and against each other. The plunger-sealing ring and the cylinder-sealing ring are metallic, their mutual contact surfaces are fitted to each other, and the plunger-sealing ring has sufficient section modulus to ensure that under high pressure the contact and bending deformations at the mutual contact surfaces will be sufficiently small as to keep a tight fit therebetween.
    Type: Application
    Filed: December 30, 2003
    Publication date: May 6, 2004
    Inventors: Victor Lugovskoy, Vladimir Magaziner, Vitaly Chertkov, Guy Danieli
  • Publication number: 20040046330
    Abstract: According to the invention a seal—arranged between a radially inwardly facing outer boundary surface of an annular sealing gap and a radially outwardly facing inner boundary surface of the sealing gap—is characterized by a sealing ring having a sealing surface which bears sealingly against one of the boundary surfaces of the sealing gap and having a pressure surface which on the side of the sealing ring in radially opposite relationship to the sealing surface forms with the other of the boundary surfaces of the sealing gap an intermediate space which is wedge-shaped in cross-section, and a pressure ring which is biased by a biasing means at least at times into the intermediate space against the other of the boundary surfaces of the sealing gap and the pressure surface for pressing the sealing surface against the one boundary surface of the sealing gap.
    Type: Application
    Filed: October 2, 2003
    Publication date: March 11, 2004
    Inventor: Aloys Wobben
  • Patent number: 6702293
    Abstract: A seal member adapted to be mounted between a cylinder head cover and an ignition plug tube comprises a mount portion interposed radially movably between an upper surface of an annular stepped portion formed around an opening of the cylinder head cover for insertion of the ignition plug tube and a baffle plate. A first seal portion and a second seal portion project radially outward and inward, respectively, from the mount portion to be brought into contact with a peripheral surface of the annular stepped portion and the ignition plug tube, respectively. The second seal portion can be elastically deformed following relative radial movements between the mount portion and the ignition plug tube.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: March 9, 2004
    Assignees: Mahle Tennex Corporation, Keeper Co., Ltd.
    Inventors: Kazutoyo Endo, Norimasa Matsui
  • Publication number: 20040041349
    Abstract: A seal includes a first seal retainer, a seal holder and a second seal retainer. A somewhat cup-shaped recess of the first seal retainer opens in a first direction of motion of a movable member against which the seal is to seal. The seal holder includes a first somewhat cuplike portion adjacent to the first seal retainer and a second somewhat cuplike portion more remote from the first seal retainer. The first somewhat cuplike portion opens in a second direction of motion opposite the first. The second somewhat cuplike portion opens in the first direction. The second seal retainer includes a first portion closer to the seal holder and a second portion more remote from the seal holder. The second somewhat cuplike portion of the seal holder receives the first portion of the second seal retainer.
    Type: Application
    Filed: May 12, 2003
    Publication date: March 4, 2004
    Inventors: Kevin L. Alexander, Jerry McPherson, Michael C. Rodgers, Roy Earl Young
  • Patent number: 6692008
    Abstract: A sealing arrangement for closing off an end of a chamber formed between a plurality of rollers of a pressing apparatus, comprises a seal member made of a hard seal material such as carbon fiber material. The sealing arrangement is preferably a self-loaded sealing arrangement.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: February 17, 2004
    Assignee: Voith Paper Patent GmbH
    Inventor: David A. Beck
  • Publication number: 20040007825
    Abstract: A lubricant leakage stop is provided on the shaft of a rotary device in the form of an annular groove in the shaft. In one embodiment the annular groove is formed with an annular inner surface at the bottom of the groove and with an annular intermediate surface positioned between two portions of the annular inner surface. The intermediate surface has a larger diameter dimension than the two inner surface portions on the axially opposite sides of the intermediate surface. The intermediate surface also has a smaller diameter dimension than that of the two portions of the shaft outer surface on axially opposite sides of the groove. In a second embodiment, the annular groove is formed with an annular inner surface that tapers from the bottom of the groove outwardly to the outer surface of the shaft on one side of the groove.
    Type: Application
    Filed: July 10, 2002
    Publication date: January 15, 2004
    Inventors: Barry M. Newberg, Gary W. Borcherding
  • Patent number: 6672594
    Abstract: A coating used to seal together surfaces of components is disclosed. The coating reduces costs associated with using gaskets and fine machining of metal components, and has slip characteristics that allow sealed components to move without eroding the coating. The coating is particularly useful in high temperature environments such as the exhaust systems of motor vehicles. Methods of using coatings to seal components are also disclosed.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: January 6, 2004
    Assignee: Dana Corporation
    Inventor: Richard J. Kozerski