Patents Examined by Vishal Patel
  • Patent number: 11028925
    Abstract: [Object] To provide a seal ring capable of both reducing a friction loss and reducing oil leakage. [Solving Means] A seal ring includes: an inner circumferential surface; an outer circumferential surface orthogonal to the inner circumferential surface; side surfaces orthogonal to the inner circumferential surface and the outer circumferential surface; and a plurality of pockets provided, spaced apart from one another in one of the side surfaces. The plurality of pockets each have a symmetrical shape in a circumferential direction and are opened on a side of the inner circumferential surface and closed on a side of the outer circumferential surface.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: June 8, 2021
    Assignee: KABUSHIKI KAISHA RIKEN
    Inventor: Namsun Park
  • Patent number: 10995858
    Abstract: This seal structure 1 is provided with an annular seal member 2, a shaft member 4 having a seal groove 5 where the inner peripheral side of said seal member 2 is arranged, and an inner peripheral wall member 6 which has an internal space surrounded by an inner peripheral wall 61, wherein the shaft member 4 is arranged in the internal space 62, and the annular seal member 2 is arranged in the seal groove 5 of the shaft member 4. The side of the outer periphery 21 of the annular seal member 2 is formed by overlapping, in the axial direction D1, a plurality of ring-shape parts 3 which are closed or unclosed when viewed in a radial direction D2; when viewed in the radial direction D2, on one side of a center axis C1 of the annular seal member 2, in a longitudinal cross-section of the plurality of ring-shape parts 3, one corner 32 of the two corners of the edge 31 facing the inner peripheral wall 61 of the inner peripheral wall member 6 contacts the inner peripheral wall 61 of the inner peripheral wall member 6.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: May 4, 2021
    Assignee: IIDA CO., LTD.
    Inventor: Shuichi Nowatari
  • Patent number: 10989308
    Abstract: A sealing device with convertible magnetic sealing medium includes a housing with an accommodation cavity formed therein, a rotary shaft rotatably disposed in the accommodation cavity, a first pole piece disposed on the rotary shaft, a second pole piece fitted over the rotary shaft, and a permanent magnet fitted over the rotary shaft between the first pole piece and the second pole piece. The rotary shaft has a first blind hole, a second blind hole, a first via hole and a second via hole. A plurality of first pole teeth are provided in an inner circumferential wall of the first pole piece and a plurality of second pole teeth are provided in an inner circumferential wall of the second pole piece. Magnetic powder is provided between a top surface of each of the first and second pole tooth and the outer circumferential surface of the rotary shaft.
    Type: Grant
    Filed: October 20, 2020
    Date of Patent: April 27, 2021
    Assignee: Tsinghua University
    Inventors: Decai Li, Zhenghao Li
  • Patent number: 10982767
    Abstract: A piston ring which is resinous includes an annular main body portion having an inner peripheral surface and an outer peripheral surface facing each other and a pair of side surfaces interconnecting the inner peripheral surface and the outer peripheral surface and a joint portion 3 formed in the main body portion. The joint portion has a step shape when viewed from at least one of the pair of side surfaces and the outer peripheral surface. The outer peripheral surface has a tapered surface having an outer diameter increasing from a side of one side surface of the pair of side surfaces of the main body portion toward a side of the other side surface.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: April 20, 2021
    Inventors: Hiroshi Shimizu, Takayuki Yoguchi, Takayuki Kondo, Masaaki Fujita
  • Patent number: 10975712
    Abstract: Provided is a brush seal in which the leakage of a sealed fluid is small. The brush seal includes: a brush formed of a bunch of a plurality of bristles; and an annular back plate arranged at a low-pressure side of the brush and provided with a plurality of grooves into which a sealed fluid is to be introduced. In the brush seal, the plurality of grooves are inclined with respect to a circumferential direction of the back plate and with respect to an extending direction (B) of the brush.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: April 13, 2021
    Inventors: Wataru Kimura, Takeshi Hosoe, Hideyuki Inoue, Toru Kono
  • Patent number: 10962116
    Abstract: A rotary seal comprises a seal element comprising a disc-shaped body having a first axial side and an opposed second axial side. The seal element further comprises a radially inner central circular opening for receiving a rotary shaft, the opening having an inner periphery for sealing engagement with the shaft. A radially outer rim portion of the seal element comprises an axially facing annular sealing surface provided on the first axial side for sealing engagement in use with an opposed axially facing sealing surface of an adjacent first static housing and an axially facing pocket provided on the second axial side and having an axially facing surface for receiving, in use, an annular elastomeric biasing element. At least one drainage passage is formed through the outer rim portion from an inlet on the second axial side to an outlet on a radially outer portion of the rim portion.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: March 30, 2021
    Assignee: CLAVERHAM LIMITED
    Inventors: George Edmond, Simon Ennor, Jonathan Robins, Paul Bowles, Pawel Kwasniewski
  • Patent number: 10962119
    Abstract: An arc-shaped stepped magnetic fluid sealing device comprises a casing, a sealing assembly and an end cover. The sealing assembly comprises a shaft, a permanent magnet, a first pole shoe and a second pole shoe. Inner walls of the first pole shoe and the second pole shoe are both arc-shaped faces inclined towards the side where the permanent magnet is located. A sealed cavity with a larger middle and two smaller ends is enclosed by the inner wall of the first pole shoe, an inner wall of the permanent magnet, and the inner wall of the second pole shoe. A portion of the shaft that is located inside the sealed cavity matches the sealed cavity in shape. Inner walls of the first pole shoe and the second pole shoe are respectively provided with first pole teeth and second pole teeth.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: March 30, 2021
    Inventors: Xiaolong Yang, Decai Li, Fan Chen, Meili He, Peng Sun, Fuxiang Hao
  • Patent number: 10948014
    Abstract: An intershaft seal assembly for maintaining separation between a piston ring and a pair of mating rings is presented. The assembly includes a piston ring interposed between forward and aft mating rings and a plurality of hydrodynamic grooves disposed along a sealing face of each mating ring. Each hydrodynamic groove further includes at least two adjoining steps wherein each step is defined by a base wall arranged to decrease depthwise in the direction opposite to rotation of an inner shaft. Two adjoining base walls define a base shoulder which locally redirects potion of a longitudinal flow within the groove to form an outward flow in the direction of the piston ring. Base walls are bounded by and intersect a pair of side walls with at least one side shoulder thereon which narrows the groove widthwise and locally redirects portion of the longitudinal flow to form a lateral flow from one side wall toward another side wall.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: March 16, 2021
    Assignee: Stein Seal Company
    Inventor: Glenn M. Garrison
  • Patent number: 10941863
    Abstract: A sliding component includes a pair of sliding parts of which a rotating-side sliding part rotates in both forward and reverse directions. In the sliding component, at least one of the sliding parts has a sliding face provided with positive pressure generation grooves on the sealed fluid side, and a negative pressure generation groove on the opposite-to-sealed-fluid side and separated from the opposite-to-sealed-fluid side by a land, and a deep groove communicating with the sealed fluid side on the sealed fluid side of the negative pressure generation groove. The positive pressure generation grooves each have an upstream end communicating with the deep groove, and the negative pressure generation groove has an upstream inlet and a downstream outlet that communicate with the deep groove, and an intermediate portion between the inlet and the outlet located on the opposite-to-sealed-fluid side of the inlet and the outlet.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: March 9, 2021
    Inventors: Yuta Negishi, Sayaka Kosugi, Hideyuki Inoue, Takeshi Hosoe, Yuichiro Tokunaga
  • Patent number: 10933520
    Abstract: A removable protection device is for a transmission seal providing tightness between a differential housing and a transmission shaft inserted therein during installation. The removable protection device includes a cylindrical, longitudinally slotted protection ring which is placed under the seal so as to protect same during the insertion of the shaft, a bearing flange for bearing on the housing, connected to the ring and having a radial opening following the slot of the ring, a removal handle attached to the bearing flange, and an abutment projecting axially towards the outside of the housing from the annular flange, so as to halt the insertion of the shaft in a reference position.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: March 2, 2021
    Assignee: RENAULT s.a.s.
    Inventor: Bruno Muller
  • Patent number: 10935140
    Abstract: An improved rotor or stator split ring seal assembly includes a flexible ring-advancing mechanism that advances at least one of the split ring halves radially inward, so that during assembly the split ring halves meet before adjacent elastomeric members, thereby preventing the elastomeric members from expanding between the seal ring halves and interfering with their alignment. The ring-advancing mechanism is flexed as the seal is assembled, thereby allowing the ring halves to be seated in the housing. The ring-advancing mechanism can be removable after assembly or internal to the seal. In various embodiments, the ring-advancing mechanism is a flexible bracket, a coil spring, or a vertical or horizontal leaf spring. Separate, identical ring-advancing mechanisms can be included with each of the housing halves so as to advance the split ring halves symmetrically.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: March 2, 2021
    Assignee: Flowserve Management Company
    Inventors: Glenn Robert Owens, Jr., Rodney Wayne Rynearson, Michael Anthony Kraus
  • Patent number: 10927961
    Abstract: A shaft seal assembly comprises a stator configured to engage a housing and a rotor positioned within the stator. The stator may include a main body, a stator inward radial projection extending radially inward from the stator main body, and a collection groove adjacent the stator inward radial projection. The rotor may include a rotor main body and a rotor axial projection extending from the rotor main body. The rotor axial projection may be positioned adjacent a distal end of the stator inward radial projection.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: February 23, 2021
    Assignee: Inpro/Seal LLC
    Inventors: Neil F. Hoehle, Chintan Shah
  • Patent number: 10876630
    Abstract: In one surface of a ring member, a plurality of incision grooves incised in a radial direction from an inner peripheral edge up to an appropriate position and those incised from an outer peripheral edge to an appropriate position are alternately formed, and in the other surface, incision grooves continuing from the inner peripheral edge up to the outer peripheral edge are formed. In order to adapt to the expansion and the contraction due to a temperature change and a change in shape and dimension due to abrasion, the inner incision grooves and the outer incision grooves increase/decrease in width, causing the packing to expand/contract in the circumferential direction, so that the packing is capable of maintaining its contact state with a shaft to minimize the leakage of the fluid.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: December 29, 2020
    Assignee: MITSUI E&S MACHINERY CO., LTD.
    Inventor: Masaki Tanaka
  • Patent number: 10865880
    Abstract: A seal arrangement for a process device or installation. A component arrangement has two components adjoining one another in sections in the area of a gap. A groove toward the gap is formed on one of the two components, which groove is L-shaped and is open toward an edge of the gap. A seal is inserted into the groove, which seal also has an L shape that corresponds to the L shape of the groove, for which purpose the seal has a first sealing limb and a second sealing limb at right angle thereto. The first sealing limb is designed so that the first sealing limb is inserted into the first limb of the groove, and the second sealing limb is designed in such a way that the second sealing limb can be inserted into the second limb of the groove and is firmly clamped there, and the first sealing limb is firmly clamped into the first limb of the groove in the manner of a sealing foot with oversize.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: December 15, 2020
    Assignee: GEA MECHANICAL EQUIPMENT GMBH
    Inventors: Wilfried Mackel, Thomas Kleimann
  • Patent number: 10837557
    Abstract: A seal assembly includes a pair of opposing seal lips, a bearing contacting both seal lips, a wall structure placed between and in contact with both seal lips, and a housing enclosing the pair of seal lips and the bearing that is configured to axially slide the seal lips, wall structure and bearing as the housing axially slides.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: November 17, 2020
    Assignee: Trelleborg Sealing Solutions US, Inc.
    Inventors: Samuel D. Wagoner, Jeff A. Baehl, Larry J. Castleman
  • Patent number: 10837558
    Abstract: The invention relates to a seal arrangement for sealing a radial gap between an inner first component (8) and an outer second component (15) which can be rotated in relation to each other, the first component (8) being rotatable about an axis of rotation and the second component (15) being arranged coaxially to the first component (8). The seal arrangement comprises: a dynamic seal part (14) connected to the first component (8); a static seal part (15) connected to the second component (15); a first labyrinth seal (1) formed by a gap between a first section of opposing surfaces of the dynamic seal part (14) and the static seal part (15); and a leaf seal (2) which is radially arranged inside the first labyrinth seal (1). The invention is characterised in that the seal arrangement comprises a dust protection cover (3) connected to the second component (15), which is arranged radially outside the first labyrinth seal (1).
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: November 17, 2020
    Assignee: Siemens Aktiengesellschaft
    Inventors: Michael Klein-Hitpass, Oliver Bachler, Ingo Kleidt
  • Patent number: 10829238
    Abstract: The present invention provides an arrangement for passing a line in a load-free manner through a pressure frame of a fuselage of an aircraft or spacecraft, including an opening penetrating the pressure frame, through which opening the line is passed, the line being mechanically decoupled from the pressure frame; and a flexible sealing device arranged outside the opening at least in portions, which sealing device is simultaneously operatively connected to the line and the pressure frame for the pressure-tight separation of a first side from a second side of the pressure frame. The present invention also provides a fuselage for an aircraft or spacecraft having an arrangement of this type and an aircraft or spacecraft having an arrangement of this type or having a fuselage of this type.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: November 10, 2020
    Assignee: Airbus Operations GmbH
    Inventor: Ralf Becks
  • Patent number: 10801622
    Abstract: Supported face seal assemblies and related methods are disclosed. The supported face seal assemblies have spring energized seal element supported by a backing ring. When the two components are joined, they form an interlocking face seal assembly that is less prone to separate during installation and/or service. The methods disclosed include the steps of forming a spring energized sealing element with a convex outer surface, forming a backup or support ring with a concave inner surface, assembling the sealing element into the inner bore of the backup or support ring such that the concave inner surface accepts a portion of the convex outer surface and the sealing element is retained within the backup or support ring.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: October 13, 2020
    Assignee: Bal Seal Engineering, LLC
    Inventor: Mike Foster
  • Patent number: 10801348
    Abstract: Non-contacting dynamic seals having wave springs are disclosed herein. A non-contacting dynamic seal may have a shoe coupled to an outer ring by an inner beam and an outer beam. A wave spring may be located between the inner beam and the outer beam, between the shoe and the inner beam, or between the outer beam and the outer ring. The wave spring may damp vibrations in the inner beam and the outer beam.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: October 13, 2020
    Assignee: Raytheon Technologies Corporation
    Inventors: Ross Wilson, John R. Farris, Michael G. McCaffrey, Theodore W. Hall, John J. Korzendorfer, Elizabeth F. Vinson, Jeffrey Michael Jacques, John E. Paul, Edwin Otero, Alan W. Stoner
  • Patent number: 10767763
    Abstract: An annular seal member 2 is formed by overlapping, in the axial direction D1, a plurality of ring-shape parts 3 which are closed or unclosed when viewed in a radial direction D2 orthogonal to the axial direction D1 of the annular seal member 2. A seal groove 5 has a groove bottom 51 with an outer diameter R51 that increases along the axial direction D1. The inner periphery 22 of the annular seal member 2 contacts the groove bottom 51, and the inner diameter R22 of the inner periphery 22 increases as the outer diameter R51 of the groove bottom 51 increases. By this means, the outer diameter R21 of the outer periphery 21 increases, and the side of the outer periphery 21 of the annular seal member 2 that has a smaller outer diameter R21 does not contact the inner peripheral wall 61 of an inner peripheral wall member 6, and the side of the outer periphery 21 of the annular seal member 2 that has a greater outer diameter R21 does contact the inner peripheral wall 61 of the inner peripheral wall member 6.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: September 8, 2020
    Assignee: IIDA CO., LTD.
    Inventor: Shuichi Nowatari