Patents Examined by Vishal Patel
  • Patent number: 11408512
    Abstract: A magnetic fluid sealing device, includes first pole teeth and a first magnetic fluid adsorbed on the first pole teeth functioning as a first line of defense for sealing, as well as second pole teeth and a second magnetic fluid adsorbed on the second pole teeth functioning as a second line of defense for sealing. The second pole teeth of the magnetic fluid sealing device are arranged on the permanent magnet or the flux sleeve. Since the flux sleeve is fitted over the permanent magnet, the arrangement of the second pole teeth can ensure the ability of the pole shoe to absorb the magnetic fluid, and also can make full use of a length of the permanent magnet in the axial direction of the rotating shaft. Therefore, the magnetic fluid sealing device is effectively improved in the sealing effect and the pressure resistance without increasing its axial length.
    Type: Grant
    Filed: December 28, 2021
    Date of Patent: August 9, 2022
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Decai Li, Xiao Liu, Zixian Li
  • Patent number: 11396946
    Abstract: The invention relates to a tribological body (10) comprising a body with a sliding surface (12) and at least one hollow space through which a fluid can flow. The body (10) consists of a first monolithic partial body (14) comprising the sliding surface (12) and of a second monolithic partial body (16) connected to the first one, wherein the hollow space is designed as a conduit (20) which runs at least in sections inside the second partial body and is delimited from the latter at least on the bottom side and the side surface sides.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: July 26, 2022
    Assignee: SCHUNK KOHLENSTOFFTECHNIK GMBH
    Inventors: Gert Wahl, Konstantin Lider, Philipp Gingter
  • Patent number: 11371560
    Abstract: A pillow block bearing seal for sealing the shaft opening around the shaft of a pillow block, having a stator assembly, a rotor, and a resilient cylinder sleeve. The stator assembly has a cylindrical base having an axial length that is configured to accept the shaft passing there through, and a stator extending annularly from an axial end of the cylindrical base. The rotor is configured to attach to and rotate with a rotatable shaft, and has an axially inward-facing surface that confronts the axially outward-facing surface of the stator to define labyrinth interface passage. The resilient cylindrical sleeve is fixed to an outer surface of the cylindrical base for contact with a pair of annular ribs of the bearing housing, for stabilizing the alignment of the center line of the shaft with the bearing housing.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: June 28, 2022
    Assignee: ORION ENGINEERED SEALS, LLC
    Inventors: Randall Jaskot, Todd Brickson
  • Patent number: 11365641
    Abstract: The present disclosure relates generally to a sliding seal between two components. The sliding seal includes a first seal section and an uncoupled second seal section which allows the first and second seal sections to move relative to one another during relative movement between the two components. A wave spring and/or a rope seal is disposed between the first and second seal sections biases the first and second seal sections away from one another.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: June 21, 2022
    Assignee: RAYTHEON TECHNOLOGIES CORPORATION
    Inventors: Timothy M. Davis, Paul M. Lutjen
  • Patent number: 11365839
    Abstract: A pipe joining system and pipe joint are shown in which two sections of plastic pipe, particularly molecularly oriented pipe, are joined. A ring-shaped elastomeric body is installed within a mating groove provided in a mouth region of female pipe section. The ring-shaped body is formed of an injection molded elastomeric material which is joined to a series of arcuate gripping segments which have teeth on an inner surface thereof which are designed to engage an outer surface of a mating male pipe section to restrain movement of the male pipe after assembly of a pipe joint. The gripping segments are separated by a gap which is open prior to assembly, but which closes during assembly. Each of the segments also has a positive stop feature to prevent over travel of the male pipe section relative to the female pipe section.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: June 21, 2022
    Assignee: S & B Technical Products, Inc.
    Inventor: Guido Quesada
  • Patent number: 11359722
    Abstract: A sealing member is provided, including a plurality of nodes and a plurality of antinodes. Each sealing member can be rotated to expose nondamaged lobes for sealing, and prevents the sealing member from falling out of the lobed groove. A chamber is provided, including a groove that the sealing member is placed in. A method of rotating and placing the sealing member is provided, including a rotation to expose nondamaged portions of the sealing member.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: June 14, 2022
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Shagun P. Maheshwari, Yao-Hung Yang, King F. Lee, Andrew Yu, Aniruddha Pal, Tom K. Cho, Chien-Min Liao
  • Patent number: 11353088
    Abstract: A chain unit lubricated and sealed with magnetic fluid includes a pin shaft, a magnetic sleeve, a first pole piece and a second pole piece. The sleeve is fitted over an outer periphery of the pin shaft. Both ends of the pin shaft protrude from the sleeve. A first gap exists between an inner peripheral surface of the sleeve and an outer peripheral surface of the pin shaft. The first pole piece is arranged at one of the sleeve and has a first mating hole. A second gap exists between an inner wall surface of the first mating hole and the outer peripheral surface of the pin shaft. The second pole piece is arranged at the other end of the sleeve and has a second mating hole. A third gap exists between an inner wall surface of the second mating hole and the outer peripheral surface of the pin shaft.
    Type: Grant
    Filed: October 21, 2021
    Date of Patent: June 7, 2022
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Decai Li, Yanwen Li, Siyu Chen
  • Patent number: 11333253
    Abstract: A magnetic seal assembly comprises a metallic annular wear seal. A magnetic seal has a magnetic annular body adjacent to and attracting the wear seal into contact against a contact face thereof. A retainer ring is connected to a surface to the magnetic seal, the retainer ring having a coefficient of thermal expansion different than a coefficient of thermal expansion of the annular body, the coefficient of thermal expansion of the retainer ring selected to constrain a thermal expansion of the annular body. A method for controlling a thermal expansion of a magnetic seal assembly is also provided.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: May 17, 2022
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventor: Marc-Andre Pelletier
  • Patent number: 11333251
    Abstract: A controllable mechanical seal for sealing a shaft rotatable relative to a housing of a device which manipulates a fluid, the seal including: (i) a first face element having a first face surface, wherein the first face element is adapted to rotate with the shaft; (ii) a second face element having a second face surface, wherein the second face element is adapted to be supported within the housing; wherein the first face surface and the second face surface define a gap between the surfaces, physical dimensions of the gap contributing to defining a leakage rate of the fluid through the gap; wherein at least one of the first face element or the second face element includes at least one cavity wholly contained within the face element, the at least one cavity adapted to contain a hydraulic fluid; and wherein the at least one cavity is in fluid communication with at least one hydraulic intensifier and at least one pressure control valve, the at least one hydraulic intensifier being in pressure communication with a s
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: May 17, 2022
    Assignee: GEORGIA TECH RESEARCH CORPORATION
    Inventors: Richard F. Salant, John Wilson Payne
  • Patent number: 11333197
    Abstract: A circumferential seal assembly suitable for forming a thin film between a rotatable runner and a sealing ring is presented. The assembly includes an annular seal housing, a rotatable runner, an annular seal ring, and a plurality of groove structures. Each groove structure includes a groove and an optional feed groove. The groove includes at least two adjoining steps defined by base walls arranged to decrease depthwise. Two adjoining base walls are disposed about a base shoulder. Each base shoulder locally redirects a longitudinal flow to form an outward radial flow in the direction of the annular seal ring. The base walls are bounded by and intersect a pair of side walls. A side wall includes at least one side shoulder which narrows the groove widthwise and locally redirects the longitudinal flow to form a lateral flow in the direction of the other side wall. Outward and lateral flows separately or in combination enhance stiffness of a thin-film layer between the annular seal ring and the rotatable runner.
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: May 17, 2022
    Assignee: Stein Seal Company
    Inventor: Glenn M. Garrison
  • Patent number: 11333275
    Abstract: Pipe sections are often connected together with a spigot end received within a bell end and a gasket provided there between. An assist may be helpful to apply at least a tension if not move the gasket towards a gap between the bell end and an exterior surface of the spigot end of the two pipe portions, and/or against the exterior surface of the spigot end so as to improve the likelihood of an adequate seal.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: May 17, 2022
    Inventor: Troy Daniel Roach
  • Patent number: 11306821
    Abstract: A refrigerator gasket assembly has a first gasket section, a second gasket section and a coupler connecting the first gasket section and the second gasket section. The coupler is configured to permit the selective connection and disconnection of the first gasket section from the second gasket section. In some variations, the coupler is a two piece coupler and in other variations the coupler is a three piece coupler.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: April 19, 2022
    Inventor: Wesley G. Moulton
  • Patent number: 11300211
    Abstract: A capillary magnetic-liquid sealing device includes: a housing having a shaft chamber; a rotating shaft arranged in the shaft chamber; a first pole shoe and a second pole shoe fitted over the rotating shaft and spaced apart in an axial direction of the rotating shaft; a permanent magnet fitted over the rotating shaft and located between the first pole shoe and the second pole shoe; a first magnetically nonconductive capillary block and a second magnetically nonconductive capillary block fitted over the rotating shaft and spaced apart in the axial direction of the rotating shaft. A first capillary cavity is formed among the first magnetically nonconductive capillary block, the first pole shoe and the rotating shaft; and a second capillary cavity is formed among the second magnetically nonconductive capillary block, the second pole shoe and the rotating shaft.
    Type: Grant
    Filed: September 7, 2021
    Date of Patent: April 12, 2022
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Decai Li, Rui Sun, Qian Li
  • Patent number: 11293649
    Abstract: A protective seal removably fits onto the top of coil fins of a condenser unit for an air conditioning system. The protective seal has a U-shaped cross-sectional configuration that allows the protective seal to fit over and completely cover the entire top edges of the coil fins and to extend partially down the front and rear sides of the coil fins to cover an upper portion of the front and rear sides of the coil fins. The protective seal is further structured to follow the contour of the top edges of the coil fins around all sides of the condenser unit to protect the top edges and the upper portion of the front and rear sides of the coil fins when the top lid of the condenser housing is both hinged open and closed.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: April 5, 2022
    Inventor: Omar Crespo-Calero
  • Patent number: 11286992
    Abstract: A sealing boot for sealing a joint of 8 & 8¼ front differentials, where the sealing boot comprises a first sealing boot section having a first cylindrical inside surface. The first sealing boot section is adapted for being tightly fitted to a shoulder section of an end portion of a differential output shaft protruding a housing of the 8 & 8¼ front differential. The shoulder section is disposed between a male spline and the housing. A second sealing boot section has a second cylindrical inside surface. The second sealing boot section is adapted for being tightly fitted to an outside surface section of an end portion of a CV axle shaft having a female spline disposed therein. The female spline being adapted for being engaged with the male spline of the differential output shaft. The sealing boot forms a sealed enclosure between the first cylindrical inside surface and the second cylindrical inside surface.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: March 29, 2022
    Inventors: Richard Bruce Rood, Rood Bruce Allen
  • Patent number: 11287045
    Abstract: A seal ring system is provided. The seal ring system comprises a segment defining a slot, a pedal along the slot, and an opening offset from the slot. A retention fastener may be disposed in the opening. A seal ring system is also provided comprising a first segment defining a first opening, a second segment defining a second opening, and a retention fastener extending through the first and second openings. The retention fastener configured to allow relative radial movement of the first segment and the second segment. A seal is further provided comprising a seal ring having a central axis, a petal extending radially inward with respect to the central axis of the seal ring, and a sealing disk axially proximate the seal ring. The sealing disk may have a seal shoe configured as a primary seal. The petal may extend toward the seal shoe.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: March 29, 2022
    Assignee: Raytheon Technologies Corporation
    Inventors: Michael G. McCaffrey, John R. Farris, Theodore W. Hall, John J. Korzendorfer, Elizabeth F. Vinson, Jeffrey Michael Jacques, John E. Paul, Ross Wilson, Edwin Otero, Alan W. Stoner
  • Patent number: 11261972
    Abstract: A combined sealing device with magnetic fluid includes a housing having a chamber; a rotating shaft rotatably arranged in the chamber; a seal assembly fitted over the rotating shaft and located in the chamber, in which the seal assembly includes a brush seal part, a magnetic fluid seal part, and a labyrinth seal part all fitted over the rotating shaft and spaced apart from one another in an axial direction of the rotating shaft, the brush seal part being arranged adjacent to the sealing cavity, and the magnetic fluid seal part being arranged between the brush seal part and the labyrinth seal part; and an absorption part arranged in the brush seal part and configured to adsorb a sealing medium spilled from the sealing cavity.
    Type: Grant
    Filed: October 22, 2021
    Date of Patent: March 1, 2022
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Decai Li, Yanwen Li, Zepeng Li
  • Patent number: 11248703
    Abstract: A metal gasket which enables improvement of sealing properties by making sufficient compression of a full bead possible even if elastic coating is formed along the full bead. In the gasket (1) having a full bead (13), formed on a metal substrate (10), having a mountain-shaped protruding surface formed on one side in a thickness direction and a valley-shaped recessed surface formed on the other side in the thickness direction, elastic coating (20) is formed on the whole surface of the protruding surface of the full bead (13), and the elastic coating (20) is formed on the recessed surface of the full bead (13), except a slit-shaped elastic coating-free section (14) along a bottom section (13a) of the recessed surface.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: February 15, 2022
    Inventors: Takeo Morimoto, Misaki Gushiken
  • Patent number: 11225877
    Abstract: The present disclosure relates generally to a sliding seal between two components. The sliding seal includes a first seal section and an uncoupled second seal section which allows the first and second seal sections to move relative to one another during relative movement between the two components. A wave spring and/or a rope seal is disposed between the first and second seal sections biases the first and second seal sections away from one another.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: January 18, 2022
    Assignee: RAYTHEON TECHNOLOGIES CORPORATION
    Inventors: Timothy M. Davis, Paul M. Lutjen
  • Patent number: 11174946
    Abstract: A magnetic fluid seal includes an outer cylinder member that houses therein a rotating shaft extending from a housing of a fluid machine, magnetic pole members housed in the outer cylinder member, disposed around the rotating shaft and forming a magnetic circuit, and sealing films to be formed from magnetic fluids, in an axial direction, in magnetic connection with the magnetic circuit, and between the magnetic pole members and the rotating shaft. The magnetic fluid seal further includes a gas supply passage that allows a gas to flow from an outside toward the magnetic pole members.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: November 16, 2021
    Inventor: Kazuhiko Sato