Patents Examined by Alison K. Pickard
  • Patent number: 8231130
    Abstract: A mechanical seal having a seal cover capable of being installed on the outer surface around the circumferential surface of a hole of a seal housing and having an inner circumferential surface surrounding a shaft; a bellows having a first installation portion and a second installation portion, the first installation portion being formed by sealingly fitting the inner circumferential surface of the seal cover to one end circumferential surface of the bellows, the seconds installation portion being at the other end circumferential surface of the bellows, the first installation portion and the second installation portion forming a tubular portion between the portions, the tubular portion being formed as an elastic means surrounding the shaft; a stationary sealing ring sealingly installed on the circumferential surface of the second installation/portion and having an annular sealing surface pressed by the elastic means of the bellows; a rotating sealing ring having an annular relative sealing surface facing the s
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: July 31, 2012
    Assignee: Eagle Industry Co., Ltd.
    Inventor: Hidekazu Takahashi
  • Patent number: 8011671
    Abstract: A dynamic shaft seal assembly has inner and outer cases that are clamped together to secure a seal element therebetween for dynamic sealing about a rotatable shaft. The inner case is formed with integral pull tabs that are engageable by a seal removal tool to facilitate the removal of the seal assembly from a bore in which the seal assembly is installed.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: September 6, 2011
    Assignee: Federal-Mogul World Wide, Inc.
    Inventor: Christopher Madigan
  • Patent number: 7992875
    Abstract: A door weather strip includes a base attached along the outer periphery of a door frame and a hollow seal, and a clip attached to the base. The clip includes an engaging part fit in and enagageable with an attaching hole in the door frame and a retained part retained to the base. The retained part includes a retaining piece and a coupling portion coupling the center area of the retaining piece in the longitudinal direction and the engaging part. Using an inserting means equipped with an insertion pin which is nearly cylindrical and sharp-pointed, the insertion pin is pierced into the base so that the retaining piece is fed through the inner peripheral side of the insertion pin to the inner face side of the base, thereby attaching the clip to the base.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: August 9, 2011
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Yoshihisa Kubo, Hideaki Minoura, Tomonori Inoue
  • Patent number: 7976028
    Abstract: By improving a metal gasket having a corrugated portion which is advantageous in sealing property, a non-asbestos gasket in which the sealing property is further improved is provided. A non-asbestos gasket has a three-layer structured sealing portion S configured by: a core layer 1A which is made of a plate of a metal, and which is formed into a concentric circle-like corrugated shape; and surface layers 2, 3 which are made of expanded graphite, and which are stacked on the front and back faces of the core layer, respectively. In an outer circumferential end of the sealing portion S, the core layer 1A is protruded from the front and back surface layers 2, 3 toward an outer diameter side. In an inner circumferential end of the sealing portion S, the front and back surface layers 2, 3 are protruded from the core layer 1A toward an inner diameter side, thereby covering the core layer 1A.
    Type: Grant
    Filed: August 6, 2007
    Date of Patent: July 12, 2011
    Assignee: Nippon Pillar Packing Co., Ltd.
    Inventors: Takeshi Miyoshi, Hiroki Hayashi, Masao Konaka, Yoshinari Kobuchi, Hiroyuki Sasakura
  • Patent number: 7963526
    Abstract: A radial shaft seal is provided for accommodating large radial offset of the shaft relative to a housing. The seal includes an annular retainer insert provided for engaging the seal to a fixed housing. An annular elastomeric seal body is molded to the retainer insert and includes a flexible axially extending portion extending from an inner surface of the retainer insert. A seal portion extends from a radially inward end of the flexible portion and includes first and second seal lips and an elastomeric bearing surface disposed between the first and second sealing lips. The bearing surface includes a plurality of raised pads adapted to engage the shaft. The pads each include a rounded edge on lateral sides thereof for encouraging the creation of a lubricating film between the pads and shaft. The pads are lubricated by a lubricant disposed in a lubricant chamber disposed between the first and second seal lips.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: June 21, 2011
    Assignee: Freudenberg-NOK General Partnership
    Inventor: John C. Dahlheimer
  • Patent number: 7959161
    Abstract: In order to make it possible to previously specify which of two members the rubber-like elastic part pinched between the two members attaches to, and to improve workability of rework or the like, an attachment member specifying structure is provided in the rubber-like elastic part so that the rubber-like elastic part is surely detached from one member and attached to the other member at a time of moving the two members apart from each other, preferably by forming a contact area with one member in the rubber-like elastic part smaller than a contact area with the other member, by forming a surface treated portion by matte finishing or the like in a contact area with one member in the rubber-like elastic part, or by forming a projection-like spring portion elastically pressed to one member so as to achieve a spring effect.
    Type: Grant
    Filed: June 20, 2003
    Date of Patent: June 14, 2011
    Assignee: NOK Corporation
    Inventors: Shota Seki, Masayuki Kishimoto
  • Patent number: 7959157
    Abstract: An oil seal having the usual lips for retaining oil and a guide member made of a variety of relatively stiff or rigid materials. The guide member is made slightly larger than the smallest diameter of the seal member when the seal rests on the shaft. The seal member can have the guide member on either the air side or the oil side of the seal. The disclosure also relates to a shipping plug, which is inserted into the seal and retains the oil in place during shipping when the seal is installed but a shaft is not installed.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: June 14, 2011
    Assignee: SKF USA Inc.
    Inventors: David Dobbs, Mark F. Spreitzer, Dennis Nelson Denton, Kacy D. Denton, Kevin R. Suva
  • Patent number: 7959159
    Abstract: In order to provide a seal arrangement for sealing between a first medium space filled with a first medium and a second medium space filled with a second medium which ensures reliable sealing between the medium spaces with very low leakage values even over a prolonged period of use, wherein said seal arrangement comprises a moveable component which is displaceable in the longitudinal direction thereof and/or rotatable about the longitudinal direction thereof and extends through the seal arrangement and wherein the seal arrangement comprises a sealing element which comprises a first sealing region that is sealing in relation to the first medium space and a second sealing region that is sealing in relation to the second medium space, wherein the first sealing region comprises a first dynamic sealing section abutting against the moveable component and the second sealing region comprises a second dynamic sealing section abutting against the moveable component and at least one of the two dynamic sealing sections h
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: June 14, 2011
    Assignees: ElringKlinger AG, Robert Bosch GmbH
    Inventors: Klaus Hocker, Walter Schuhmacher, Clemens Schefzik, Klaus Lang, Siamend Flo, Berthold Pfuhl, Heinz Siegel
  • Patent number: 7950669
    Abstract: The invention provides a method that can be applied, for example, to seal a constant velocity joint. The invention includes a method comprising the steps of substantially sealing the constant velocity joint with the primary boot which includes first and second ends, fixedly associating the first end of the primary boot with the constant velocity joint, and slidably associating the second end of the primary boot with the shaft which extends from the constant velocity joint. In one aspect, the invention includes a primary boot having a body defining a substantially smooth interior surface and a secondary boot associated with the primary boot and spaced from the interior surface. In another aspect, the invention includes a constant velocity joint having an outer joint member, an inner joint member positioned in the outer joint member, a plurality of ball members positioned between said outer and inner joint members, and a shaft engaged with and extending from the inner joint member.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: May 31, 2011
    Inventors: Keith A. Kozlowski, Federico Villalobos, Sergio Molinar, Dennis R. Hansen, Jerry L. Eaton
  • Patent number: 7950672
    Abstract: A magnet is embedded in an outer rotational shaft provided in a bearing hole of a case, and an outer magnetic circuit and an inner magnetic circuit are formed on the outer peripheral surface and inner peripheral surface of the outer rotational shaft, respectively. In a magnetic fluid seal device, magnetic fluid is filled in minute gaps coming in contact with the outer peripheral surface and inner peripheral surface of the outer rotational shaft, and the two rotational shafts can be strongly sealed by the magnetic circuits formed by a magnet. As a result, the rotational shafts can be rotated while supported in a non-contact style. In addition, the dimension can be reduced, and the number of parts can be reduced.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: May 31, 2011
    Assignee: Rigaku Corporation
    Inventors: Yasuyuki Shimazaki, Kiyoshi Akiyama
  • Patent number: 7946593
    Abstract: A seal is provided for sealing a hollow shaft, where the hollow shaft has an inner surface that may be uneven due to shot peening. The seal includes an axially extending ring section having a first end, a second end, an inner surface, and a disk section disposed substantially perpendicular to the ring section inner surface between the ring section first and second ends. The seal conforms to the shaft inner surface to stop oil leakage.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: May 24, 2011
    Assignee: Honeywell International Inc.
    Inventors: Mohsiul Alam, Jack Moy, Thomas P. Swadener, James E. Franks
  • Patent number: 7942425
    Abstract: To make a plasma resistant seal excellent in both a plasma resisting performance and a sealing performance, and prevent an O-ring from protruding to a vacuum side gap, a plasma seal (6) made of PTFE having a plasma resisting performance is provided in a plasma irradiating side of an O-ring (5) as a main seal made of a rubber-like elastic material, an installation groove (4) shallower than a depth of an installation groove (3) provided in an installation member (2) is continuously provided in a plasma irradiation side of the installation groove (3), the O-ring (5) is attached to the installation groove (3), and the plasma seal (6) is attached to the installation groove (4) in a compressed state, or the O-ring is attached to the installation groove and the plasma seal is attached to the plasma irradiation side of the same installation groove (3) in a compressed state.
    Type: Grant
    Filed: August 7, 2003
    Date of Patent: May 17, 2011
    Assignee: NOK Corporation
    Inventor: Daihachi Shojima
  • Patent number: 7942422
    Abstract: An elastomeric lip seal joint for sealing the inner liner and grout layers when joining two sections of multiwall pipe having an outer steel casing and an inner liner. The ring-shaped lip seal joint comprises a gasket with insulating material completely covering its outer surface. The insulating material is capable of shielding the gasket from the heat produced when the sections of outer steel casing are welded together. The use of the lip seal joint simplifies the process of joining sections of multiwall pipe. Each side of the lip seal joint is inserted into one of the annular voids at each end of the pipe, thereby sealing the inner liner and grout. A single circumferential weld then joins the outer steel casing. The gasket remains intact during the welding process due to the presence of the insulating material.
    Type: Grant
    Filed: January 2, 2009
    Date of Patent: May 17, 2011
    Assignee: Unisert Multiwall Systems, Inc.
    Inventor: Kenneth Tierling
  • Patent number: 7938406
    Abstract: A first gasket 10 is placed in a groove formed in a cam cover and seals a gap between a cylinder head and the cam cover. The first gasket 10 includes a pair of seal lips 13 which come into tight contact with the cylinder head and which are provided in parallel to each other, and a plurality of connecting portions 15 which are provided between the pair of seal lips 13, which are connected to each of the seal lips 13, and which hold a distance between the seal lips 13 near the connected portion.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: May 10, 2011
    Assignee: NOK Corporation
    Inventors: Tomohisa Matsumoto, Takashi Nakao, Shuji Yoshitsune, Kazuki Takeno
  • Patent number: 7926819
    Abstract: A seal for use between the housing of an automatic transmission and the housing (can) of a transmission drive motor is disposed at each end of the drive motor housing. The seal includes a preferably metal annulus having inner and outer elastomeric ribbed seals secured thereto. The annulus, which defines a non-hardened ā€œSā€ shape in cross section, maintains the shape and strength of the seal and the ribbed inner seal provides a fluid tight seal with the motor housing while the ribbed outer seal provides a fluid tight seal with the transmission housing.
    Type: Grant
    Filed: August 25, 2008
    Date of Patent: April 19, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Timothy J. Reinhart, Gregory W. Kempf, William S. Reed
  • Patent number: 7918462
    Abstract: A method for facilitating the installation of labyrinth packing comprises the step of using pressurized air to extend the packing segments of a portion of a disassembled rotor casing to the close clearance position.
    Type: Grant
    Filed: June 7, 2008
    Date of Patent: April 5, 2011
    Assignee: Star Field Fit, Inc.
    Inventors: Donna L. MacGregor, Thomas W. Rambin
  • Patent number: 7918461
    Abstract: a system for facilitating turbine labyrinth packing comprises: a packing holder 30, packing 20, packing teeth 21, pressurized air supply 50, hose 40, hose stabilizer 41, hose sleeve 42, pneumatic regulator 51, pressure gage 52, male quick disconnect 43, and female quick disconnect 44.
    Type: Grant
    Filed: February 12, 2007
    Date of Patent: April 5, 2011
    Assignee: Star Field Fit, Inc.
    Inventors: Donna L. MacGregor, Thomas W. Rambin
  • Patent number: 7914006
    Abstract: A subterranean drill tool has a seal gland formed between a rotating and a static surface. An annular elastomeric seal is located in the gland in engagement with each of the surfaces. A property gradient is formed in at least part of the elastomeric material. The property gradient defines a property that changes from a first level at the surface to a second level in the interior of the seal. The elastomeric material within the property gradient has the same chemical composition as the rest of the seal.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: March 29, 2011
    Assignee: Baker Hughes Incorporated
    Inventors: Redd H. Smith, Terry J. Koltermann
  • Patent number: 7909333
    Abstract: A seal assembly has an inner wear sleeve with an axially extending tubular body. A flange extends radially outwardly from the body. An outer seal component has an axially extending tubular outer wall with a flange extending radially inwardly therefrom to support at least one dynamic seal lip in sealing engagement with the inner sleeve body. The outer seal component includes an annular retention lip disposed axially outwardly of the wear sleeve flange. The retention lip extends radially inwardly of a radially outer edge of the flange and is deflectable in an axial direction to enable the flange of the wear sleeve to be forced axially thereby during assembly, whereupon the retention flange returns to its non-deflected position to inhibit removal of the wear sleeve in the reverse axial direction. The annular retention flange has at least one axially extending debris expulsion slot for the escapement of debris.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: March 22, 2011
    Assignee: Federal-Mogul Worldwide, Inc.
    Inventor: Gerald A. Greca
  • Patent number: 7905495
    Abstract: A circumferential sealing arrangement is disclosed herein. The circumferential sealing arrangement includes a structure operable to rotate about an axis and having a first surface facing radially outward. The circumferential sealing arrangement also includes a static housing circumscribing the rotatable structure. The circumferential sealing arrangement also includes at least one seal element connected to the static housing and having a second surface facing radially inward. The circumferential sealing arrangement also includes a seal runner rotatable with the structure and having a third surface facing radially outward. The third surface cooperates with the second surface to form a circumferential seal between the static housing and the rotatable structure. A radial gap is defined between the first surface of the rotatable structure and a fourth surface of the seal runner facing radially inward and opposing the first surface.
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: March 15, 2011
    Assignee: Rolls-Royce Corporation
    Inventor: John Munson