Patents Assigned to NOK Corporation
  • Patent number: 10865834
    Abstract: A sealing structure with an annular pocket and a sealing device includes an annular pocket and a sealing device. The pocket is provided in a slinger, and the sealing device is attached to a housing of a differential device. The slinger is arranged on an output shaft of the differential device. A recessed part of the pocket is defined by an inner peripheral tubular portion, an outer peripheral tubular portion and a bottom portion of the slinger. The outer peripheral surface of the pocket is formed in the outer peripheral tubular portion of the slinger. The outer peripheral surface of the pocket increases in diameter toward the outside in an axis direction. A side lip of the sealing device extends in the outward direction, and an annular gap is formed between the side lip and the pocket.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: December 15, 2020
    Assignee: NOK CORPORATION
    Inventors: Yusuke Kamiya, Hiroki Matsui, Shinya Omoto, Toru Nakashima, Hirotaka Mizuta
  • Patent number: 10865883
    Abstract: Provided is a sealing device capable of suppressing leakage of a fluid to be sealed while reducing rotary torque regardless of rotational direction. In a sealing ring (100) slides against a side wall surface on a low pressure side of an annular groove, a dynamic pressure generating groove (120) that includes a first groove (121) having a constant width in a radial direction and extending in a circumferential direction and a second groove (122) extending from a center position of the first groove (121) in the circumferential direction to an inner circumferential surface and guiding a fluid to be sealed into the first groove (121) is provided on a sliding surface side which slides against the side wall surface. The first groove (121) is provided at a position within a sliding region in which the sealing ring slides against the side wall surface.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: December 15, 2020
    Assignees: NOK CORPORATION, EAGLE INDUSTRY CO., LTD.
    Inventors: Masatoshi Seki, Takeshi Hosoe, Hideyuki Inoue, Yuichiro Tokunaga
  • Publication number: 20200386315
    Abstract: A sealing structure includes a sealing device including a first seal lip having a first seal-lip end, and a support ring that supports the first seal lip; and a plurality of members that define an attachment space into which the sealing device is attached, the members including an inner peripheral wall arranged on the inner periphery side of the sealing device, a first end wall arranged on one axial end of the sealing device, and a second end wall arranged on another axial end of the sealing device. The first seal-lip end has a certain amount of interference with the inner peripheral wall and the first end wall so that its radial reaction force radially presses the support ring outward and its axial reaction force presses the support ring toward the second end wall.
    Type: Application
    Filed: December 14, 2018
    Publication date: December 10, 2020
    Applicant: NOK CORPORATION
    Inventor: Naoki HAGIWARA
  • Publication number: 20200386317
    Abstract: A sealing device located between an inner member and an outer member that rotate relative to each other, for sealing a gap between the inner member and the outer member, includes a first sealing member that is to be mounted on the outer member and a second sealing member that is to be mounted on the inner member. Multiple water-discharging protrusions are supported by at least one of the first sealing member and the second sealing member. The multiple water-discharging protrusions protrudes in a space located between an annular part of the first sealing member and a flange part of the second sealing member and are arranged in a circumferential direction. Each water-discharging protrusion includes an inclined side surface intersecting at an acute angle with a rotational direction in which at least one of the inner member and the outer member rotates.
    Type: Application
    Filed: February 27, 2019
    Publication date: December 10, 2020
    Applicant: NOK CORPORATION
    Inventors: Hidenori ARAI, Yuki HANADA, Yuya SAKANO
  • Publication number: 20200370654
    Abstract: A sealing device which can reduce its sliding friction is provided. A sealing device is configured to be attached into an annular attachment groove which is opened radially outward, and includes a first ring and a second ring. The first ring is formed of a rubber-like elastic material. The first ring includes an inner peripheral contact surface, an outer peripheral contact surface a cut portion, and an annular holding groove. The inner peripheral contact surface is configured to contact a bottom surface of the attachment groove. The outer peripheral contact surface is configured to be positioned on a side opposite to the attachment groove. The cut portion is arranged in a part of the circumference of the first ring. The annular holding groove is opened in an end surface of the first ring on a pressure side. The second ring is formed of a rubber-like elastic material and held in the holding groove.
    Type: Application
    Filed: August 15, 2019
    Publication date: November 26, 2020
    Applicant: NOK CORPORATION
    Inventor: Hirokazu MAEKAWA
  • Publication number: 20200370649
    Abstract: A seal ring is an annular seal ring which is configured to be interposed between first and second members, and seals a gap between the first and second members. The second member is inserted into the first member, and reciprocates in its axial direction with respect to the first member. The seal ring includes an annular base part, an annular innermost end part, and a widening protrusion part. The annular base part has a radially exterior end to contact the first member. The annular innermost end part is integrally formed with a radially interior end of the base part to contact the second member. The widening protrusion part is integrally formed with the innermost end part, and protrudes with respect to the base part in the axial direction of the second member.
    Type: Application
    Filed: April 17, 2019
    Publication date: November 26, 2020
    Applicant: NOK CORPORATION
    Inventor: Hirokazu MAEKAWA
  • Publication number: 20200362153
    Abstract: A gasket material comprising a crosslinked fluororubber layer having a micro-hardness of 5 to 25 formed on a metal plate using a fluororubber composition comprising 30 to 70 parts by weight of carbon black having a CTAB specific surface area of 3 to 34 m2/g, and 5 to 15 parts by weight of hydrated amorphous silicon dioxide having a BET specific surface area of 35 to 220 m2/g, based on 100 parts by weight of fluororubber, wherein the total amount of carbon black and hydrated amorphous silicon dioxide is 80 parts by weight or less.
    Type: Application
    Filed: November 22, 2018
    Publication date: November 19, 2020
    Applicant: NOK CORPORATION
    Inventors: Daiki TAKEKAWA, Masahiro YOKOO
  • Publication number: 20200354548
    Abstract: An NBR composition for rubber laminated metal, having 1 to 3 parts by weight of sulfur and 1 to 15 parts by weight of a disulfide compound such as 4,4?-dithiodimorpholine or dithiocaprolactam represented by the general formula RN-S-S-NR (wherein RN is a cyclic linking group formed together with the N atom bonded to the S atom), based on 100 parts by weight of NBR. The rubber composition that can improve the protrusion properties of a rubber layer when used for, for example, a gasket or a brake shim material that is a laminated composite metal laminated with another metal plate.
    Type: Application
    Filed: October 16, 2018
    Publication date: November 12, 2020
    Applicant: NOK CORPORATION
    Inventors: Isao WATANABE, Daiki TAKEKAWA
  • Publication number: 20200353416
    Abstract: A hollow fiber membrane module includes: a tubular case; a hollow fiber membrane bundle; and a pair of sealing and fixing portions, in which an outside-membrane channel that passes by an outer wall of each of the hollow fiber membranes and an inside-membrane channel that passes through the hollow inside of each of the hollow fiber membranes are formed, moist air flows through the outside-membrane channel, and dry air flows through the inside-membrane channel, whereby moisture in the moist air is supplied to the dry air by a membrane separation effect of the hollow fiber membranes, wherein a plurality of spaces are disposed between the case inner wall and the hollow fiber membrane bundle, and a restriction portion that restricts the hollow fiber membrane from entering into the spaces is partially disposed between the hollow fiber membrane bundle and each of the spaces.
    Type: Application
    Filed: July 22, 2019
    Publication date: November 12, 2020
    Applicant: NOK CORPORATION
    Inventor: Masami ENOMOTO
  • Patent number: 10830265
    Abstract: A gasket includes a gasket body formed of a metal plate and provided with at least two locking hook portions formed to project from the gasket body and abut against side wall surfaces adjacent to a counter sealing surface. The locking hook portions include curved portions at distal end portions of the respective locking hook portions abutting against the side wall surfaces, at least one of the locking hook portions being formed to be bent toward an inside of the gasket body such that an angle made with the gasket body is an acute angle, and press the curved portions against the side wall surfaces by spring force of the locking hook portion bent at the acute angle, allowing the gasket body to hold itself on the counter sealing surface.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: November 10, 2020
    Assignee: NOK CORPORATION
    Inventor: Yasushi Kojima
  • Patent number: 10822016
    Abstract: Shock-absorbing stopper for preventing an elastic body from contacting a mating component, to cause sliding wear in a structure having a hollow in an outer peripheral surface. The stopper has a cylindrical elastic body, to which a fixed-side metal fitting is connected and to which a movable-side metal fitting is connected and an annular hollow in the outer peripheral surface, in which the stopper is sectioned into three portions by the hollow of a small diameter portion formed by the hollow, a fixed-side large diameter portion located closer to the fixed side, and a movable-side large diameter portion located closer to the movable side. The outer diameter dimension of the movable-side large diameter portion is smaller than the outer diameter dimension of the fixed-side large diameter portion and the axial width of the movable-side large diameter portion is smaller than the axial width of the fixed-side large diameter portion.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: November 3, 2020
    Assignee: NOK CORPORATION
    Inventor: Yuki Hanada
  • Patent number: 10815407
    Abstract: A rubber composition is, in particular, suitable for producing a sealing part for a high pressure hydrogen apparatus having excellent low temperature sealing properties and blister resistance, and the sealing part for a high pressure hydrogen apparatus is obtained by using the rubber composition. A rubber composition includes an ethylene/butene/ethylidene norbornene terpolymer (EBENB), and the rubber composition is for use in producing a sealing part for a high pressure hydrogen apparatus.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: October 27, 2020
    Assignee: NOK CORPORATION
    Inventor: Atsushi Koga
  • Publication number: 20200332080
    Abstract: The present disclosure provides an ethylene acrylate rubber composition which has all of oil resistance, heat resistance and hydrolysis resistance with good balance after molding and cross-linking, and a molded article formed of a cross-linked substance of the ethylene acrylate rubber composition. The ethylene acrylate rubber composition contains 100 parts by mass of an ethylene acrylate rubber, 10 to 50 parts by mass of a plasticizer with an SP value of 7 or more and 0.05 to 30 parts by mass of a cross-linking agent selected from polyvalent aliphatic primary amine or derivatives thereof. The content of a plasticizer with an SP value of less than 7 in the ethylene acrylate rubber is less than 0.1 parts by mass. Further, a molded article formed of a cross-linked product of the ethylene acrylate rubber composition is provided.
    Type: Application
    Filed: October 17, 2018
    Publication date: October 22, 2020
    Applicant: NOK CORPORATION
    Inventor: Keita OTANI
  • Publication number: 20200332896
    Abstract: A seal has a ring-like shape and configured to seal off internal space under a pressure of carbon dioxide gas from external space. The seal is a single structure being a combination of a first material and a second material. The first material is superior in heat resistance to the second material. The second material is superior in gas barrier function to the first material.
    Type: Application
    Filed: January 8, 2019
    Publication date: October 22, 2020
    Applicant: NOK CORPORATION
    Inventor: Eizo HAYASHI
  • Patent number: 10801526
    Abstract: A sealing device includes: an annular seal that is disposed on an outer periphery of a rod of a hydraulic cylinder further on a side of an extending direction than a cylinder head of the hydraulic cylinder and that has a pair of opposing first facing surfaces; a holding member disposed on an outer periphery of the seal; and a fixing member disposed on an outer periphery of the holding member, the fixing member having a tapered inner surface that contacts an outer surface of the holding member and that has an inner diameter increasing toward a retracting direction.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: October 13, 2020
    Assignees: KOMATSU LTD., NOK CORPORATION
    Inventors: Yoshio Hoshino, Hisatoshi Odaka, Kenichi Ajiki, Takafumi Nakamura, Yoshiyuki Abe
  • Publication number: 20200316582
    Abstract: A liquid injection attachment is provided that includes an attachment body having an insertion opening into which a liquid injecting implement is inserted and a liquid flow outlet; a gasket mounting portion formed on the periphery on the front end side of the attachment body; and a gasket mounted to the gasket mounting portion and brought into close contact with the peripheral portion of the liquid flow outlet, wherein the gasket mounting portion has an engaging recess and/or engaging protrusions, the gasket has an engaging protrusion 19 and/or engaging recesses, and the engagement direction thereof is in a direction toward a central axis of the attachment body.
    Type: Application
    Filed: May 11, 2017
    Publication date: October 8, 2020
    Applicant: NOK CORPORATION
    Inventors: Ryo FUTASHIMA, Hiroshi UMEBAYASHI, Toru UDA
  • Patent number: 10793706
    Abstract: A fluororubber composition comprising 10 to 50 parts by weight of wollastonite and 0.5 to 10 parts by weight of organic peroxide based on 100 parts by weight of peroxide-crosslinkable fluororubber, the wollastonite being needle-like or fibrous wollastonite having an average fiber diameter of 5 ?m or less and an average fiber length of 40 to 80 ?m, and the wollastonite being surface-treated with an amino silane coupling agent or an epoxy silane coupling agent. The fluororubber composition that can be suitably used as, for example, a molding material for normal/reverse rotation oil seals that allow continuous excellent sealing of fluid in the operation of normal and reverse rotation.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: October 6, 2020
    Assignee: NOK CORPORATION
    Inventor: Tomonori Furukawa
  • Patent number: 10794488
    Abstract: A sealing device for sealing between a valve body which is movably disposed in a valve box and which controls the flow of a fluid, and a tube which is connected to the valve box or is a part of the valve box and through which the fluid flows, is provided. The sealing device includes: a first seal portion which is a resin annular plate or film and is to be closely contacted with the outer surface of the valve body; and a cylindrical second seal portion which is formed from a material more flexible than that of the first seal portion, contacts the inner outer surface of the tube, and prevents the fluid from leaking from the tube. The first seal portion and the second seal portion are integrally joined. A flange joined to the first seal portion is formed on an edge of the second seal portion.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: October 6, 2020
    Assignee: NOK CORPORATION
    Inventor: Masaaki Yagi
  • Patent number: 10794428
    Abstract: There are provided a sealing device and a hub bearing that can reduce torque. Pear-skin-like projections and depressions are provided on each of a sliding surface in a lip for foreign object (a side lip 121a and a middle lip 121b) and a sliding surface in a lip for grease 122. Roughness of the pear-skin-like projections and depressions provided on the sliding surface of the lip for grease 122 is larger than roughness of the pear-skin-like projections and depressions provided on the sliding surface of the lip for foreign object.
    Type: Grant
    Filed: November 24, 2017
    Date of Patent: October 6, 2020
    Assignee: NOK CORPORATION
    Inventors: Yuichi Shuto, Kei Sasaki, Shohei Yamane, Yuichi Tarukawa, Takuya Kato
  • Publication number: 20200305746
    Abstract: An object of the present invention is to provide a bioelectrode, which can stably measure biological information and is suitable for repeated use, and a method of manufacturing the bioelectrode. This object is solved by a bioelectrode comprising a silver coating layer provided on a conductive silicone rubber electrode, wherein the conductive silicone rubber electrode is composed of a silicone rubber containing conductive carbon particles, the silver coating layer is composed of silicone rubber and at least one of agglomerated silver powder and flake-like silver powder, and the silver coating layer has a thickness of 18 ?m to 80 ?m, and, preferably, in which the silver powder contains both the agglomerated silver powder and the flake-like silver powder.
    Type: Application
    Filed: July 5, 2017
    Publication date: October 1, 2020
    Applicant: NOK CORPORATION
    Inventors: Ryo FUTASHIMA, Yasushi SUGIYAMA, Toru UDA