Patents Assigned to NOK Corporation
  • Patent number: 11460110
    Abstract: A sealing device includes a reinforcing ring and an elastic body part. The elastic body part includes an annular seal lip, an annular dust lip, and an annular side lip that extends toward an outer side on an outer periphery side of the dust lip. The side lip includes an annular middle portion that increases in diameter as progress toward the outer side and an annular distal end portion that is a portion connected to and on the outer side of the middle portion and that increases in diameter as progress toward the outer side. In the side lip, the distal end portion is bent to an inner periphery side from the middle portion. In the middle portion, at least one groove is formed annularly around an axis x.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: October 4, 2022
    Assignee: NOK CORPORATION
    Inventors: Toshiki Watanabe, Kokichi Hamamoto, Tomoaki Nishimura, Hiromi Sugihara
  • Patent number: 11459442
    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: Grant
    Filed: October 17, 2018
    Date of Patent: October 4, 2022
    Assignee: NOK CORPORATION
    Inventor: Keita Otani
  • Patent number: 11460109
    Abstract: A gasket has a plurality of gasket members including annular reinforcing rings formed around respective axes and annular elastic body parts that are formed around the respective axes and that are formed from elastic bodies attached to the respective reinforcing rings. Outer peripheral surfaces of the plurality of the reinforcing rings are close to each other, and the plurality of the elastic body parts are joined together.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: October 4, 2022
    Assignee: NOK CORPORATION
    Inventor: Daichi Makinae
  • Publication number: 20220302475
    Abstract: A method of shaping a gasket on a separator without causing destruction and damage. A fuel battery separator gasket is shaped via a shaping of a sticking agent and a transfer of the sticking agent. During the shaping, the sticking agent to be the gasket is shaped on a flexible substrate having flexibility. During the transfer, the sticking agent shaped on the flexible substrate is transferred to one of a pair of separators facing each other with an electrolyte membrane provided in a fuel battery cell being interposed therebetween and each having a bead forming a flow path of fluid between the bead and the electrolyte membrane in close contact with the electrolyte membrane to shape the gasket.
    Type: Application
    Filed: September 1, 2020
    Publication date: September 22, 2022
    Applicant: NOK CORPORATION
    Inventors: Taisuke MATSUDA, Shigeru WATANABE
  • Publication number: 20220299115
    Abstract: A sealing device that is adapted to be disposed between a reciprocating shaft and an inner peripheral surface of a shaft hole in which the reciprocating shaft is disposed, and that separates an oil side from an atmosphere side, includes an annular oil seal made of a resin, an oil-side rigid ring made of a metal, an elastomeric annular dust seal, and an atmospheric-side rigid ring made of a metal. The oil seal has an oil lip adapted to be in slidable contact with the reciprocating shaft and is formed of a resin having a glass transition temperature of 80 degrees Celsius or higher. The oil-side rigid ring is disposed around the oil seal and supports the oil seal. The dust seal is disposed on the atmosphere side of the oil seal and has a dust lip adapted to be in slidable contact with the reciprocating shaft.
    Type: Application
    Filed: April 24, 2020
    Publication date: September 22, 2022
    Applicant: NOK CORPORATION
    Inventors: Hiroshi ONODERA, Nobuhiro NISHIMURA, Masamichi KISHIRO
  • Publication number: 20220285701
    Abstract: A manufacturing method of a gasket that can stabilize the size and shape of the gasket without a mold. The manufacturing method of the gasket includes the steps of discharging liquid rubber onto a base member using a discharge device, and forming a rubber gasket on the base member by curing the discharged liquid rubber. The discharge device includes a valve body which opens and closes a flow channel through which the liquid rubber flows and a discharge port from which droplets of the liquid rubber are intermittently discharged as the valve body opens and closes a valve. The discharge device is a contactless-type discharge device used in a state in which the discharge port is not in contact with the base member.
    Type: Application
    Filed: July 6, 2020
    Publication date: September 8, 2022
    Applicant: NOK CORPORATION
    Inventors: Homare MIZUSAWA, Masahiro MIURA, Noriyuki GOTO, Yushi NAKAHATA
  • Publication number: 20220280092
    Abstract: A biological electrode capable of realizing good contact with a skin of a subject for detection. The biological electrode includes an electrode member, a support shaft member for supporting the electrode member, a frame member for slidably holding the support shaft member in an axial direction thereof, and an elastic member for biasing the electrode member toward the outside in the axial direction of the support shaft member.
    Type: Application
    Filed: May 14, 2020
    Publication date: September 8, 2022
    Applicant: NOK CORPORATION
    Inventors: Goki OKADA, Takahiro HAYASHI, Akira FUNAHASHI, Masayuki KUBO
  • Patent number: 11437633
    Abstract: A fuel cell seal structure includes stacked fuel cells and an electrolyte membrane or a film supported between the neighboring metal separators. Each of the stacked fuel cells includes neighboring metal separators each including a plate portion having a plate portion surface, a bead seal portion projecting from the plate portion surface and including a distal end having a distal end surface, an elastic body disposed on the distal end surface, and a stopper disposed on the plate portion surface and away from the elastic body. The neighboring metal separators are disposed such that elastic bodies are located opposed to each other in a stacking direction with the electrolyte membrane or the film supported in between the elastic bodies and face each other, and such that stoppers are located neighboring to each other in the stacking direction with the electrolyte membrane or the film supported in between the stoppers.
    Type: Grant
    Filed: January 26, 2021
    Date of Patent: September 6, 2022
    Assignee: NOK CORPORATION
    Inventors: Ryo Tomita, Hajime Yui
  • Patent number: 11433582
    Abstract: A base-material/gasket unit mold which can reduce molding failure occurrence is provided. The mold includes a first half mold including a base material holding portion arranged on a first parting surface to hold a base material, and a second half mold having a second parting surface and used together with the first half mold to close and open the mold. The second half mold includes a gasket cavity defined on the second parting surface side to form a gasket main body on a surface of the base material, an isolated rubber cavity forming an isolated rubber portion isolated from the gasket main body on the surface of the base material, and a mold-pressing portion arranged around the isolated rubber cavity to press the base material when the mold is closed and having a recessed part defined on a press surface side to reduce deformation of the base material.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: September 6, 2022
    Assignee: NOK CORPORATION
    Inventors: Hajime Yui, Kenichi Oba
  • Publication number: 20220275185
    Abstract: A rubber composition for a torsional damper, comprising 10 to 200 parts by weight of carbon black having an iodine adsorption of 100 to 600 mg/g, a DBP oil absorption of 138 to 330 cm3/100 g and a nitrogen adsorption specific surface area of 100 to 530 m2/g, and 5 to 100 parts by weight of a liquid polyolefin oligomer having a number average molecular weight Mn of 3,000 to 4,000, based on 100 parts by weight of at least one of ethylene-propylene-non-conjugated diene terpolymer rubber, ethylene-butene-non-conjugated diene terpolymer rubber and ethylene-propylene copolymer rubber, wherein in the total amount of ethylene and propylene or butene, the content of propylene or butene is 35 to 55 wt. %.
    Type: Application
    Filed: June 22, 2020
    Publication date: September 1, 2022
    Applicant: NOK CORPORATION
    Inventor: Tetsuro NEGAMI
  • Patent number: 11421198
    Abstract: A cell capture apparatus includes a cell separation unit having a flat plate shape and a cell capture unit having a flat plate shape located therebelow. A liquid sample and a carrier liquid flow in a cell-separation flow passage of the cell separation unit. The liquid sample contains multiple large cells, multiple small cells, and a sample liquid component. The cell-separation flow passage separates a set of large cells and the carrier liquid from a set of small cells and the sample liquid component. The cell capture unit includes a large-cell flow passage in which the set of large cells and the carrier liquid flows, and multiple electrode wires for attracting the large cells by means of dielectrophoresis. Multiple cell capturing wells are formed in the large-cell flow passage. Each of the multiple cell capturing wells has a size that can capture one of the large cells attracted by the electrode wires.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: August 23, 2022
    Assignees: NOK CORPORATION, THE UNIVERSITY OF TOKYO
    Inventors: Takayuki Komori, SooHyeon Kim, Teruo Fujii
  • Publication number: 20220260524
    Abstract: A particle analysis device includes an upper liquid space in which a first liquid is stored, a lower liquid space in which a second liquid is stored, a connection pore connecting the upper liquid space to the lower liquid space, and first to fourth holes. Each of the first to fourth holes has an opening that opens at a top surface of the particle analysis device. The first and second holes extend to the upper liquid space. The third and fourth holes extend to the lower liquid space. A first electrode applies an electric potential to the first liquid in the upper liquid space through the first hole, and a second electrode applies an electric potential to the second liquid in the lower liquid space through the third hole. The opening of at least one of the first hole and the second hole has an area that is greater than the rest of the hole. The opening of at least one of the third hole and the fourth hole has an area that is greater than the rest of the hole.
    Type: Application
    Filed: May 14, 2020
    Publication date: August 18, 2022
    Applicant: NOK CORPORATION
    Inventors: Yuki MUROTA, Takumi YOSHITOMI, Naohiro FUJISAWA
  • Publication number: 20220251419
    Abstract: A coating agent for oil seal comprising 10 to 90 parts by weight in total of fluororesin particles having a particle size of 2 ?m or less and filler particles other than fluororesin particles having a particle size of 0.5 to 30 ?m, and 10 to 40 parts by weight of a wax having a melting point of 40 to 160° C., based on 100 parts by weight of isocyanate group-containing 1,2-polybutadiene, and being prepared as an organic solvent solution, wherein the fluororesin particles are used at a ratio of 20 to 80 wt. % of the total filler amount. The coating agent for oil seal can improve abrasion resistance while maintaining the roughness of a coating surface to which the coating agent is applied.
    Type: Application
    Filed: June 30, 2020
    Publication date: August 11, 2022
    Applicant: NOK CORPORATION
    Inventor: Natsumi YASUNAGA
  • Publication number: 20220251420
    Abstract: A coating agent for oil seal comprising 10 to 90 parts by weight of a filler and 10 to 40 parts by weight of a wax, based on 100 parts by weight of isocyanate group-containing 1,2-polybutadiene, and being prepared as an organic solvent solution, wherein as the filler, silicone resin particles having a particle size of 0.5 to 10 ?m and fluororesin particles having a particle size of 0.1 to 2 ?m are each used at a ratio of 20 to 80 wt. % of the total filler amount. The coating agent for oil seal can exhibit excellent seal performance inherent in oil seal while maintaining excellent dispersibility of the coating agent, and can further achieve low torque characteristics.
    Type: Application
    Filed: June 30, 2020
    Publication date: August 11, 2022
    Applicant: NOK CORPORATION
    Inventor: Natsumi YASUNAGA
  • Patent number: 11407879
    Abstract: An acrylic rubber composition comprising 5 to 12.5 parts by weight of silica and 5 to 15 parts by weight of graphite as fillers, based on 100 parts by weight of ultracold-resistant acrylic rubber having a glass transition point Tg of ?42° C. or less. Due to the use of ultracold-resistant acrylic rubber, the use environment temperature, i.e., ?30 to +150° C., is satisfied. In addition, the respective use of specific amounts of silica and graphite as fillers allows the formation of bonded piston seals that have roll processability and adhesion equivalent to or higher than those of the existing seals, and that satisfy compression set characteristics.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: August 9, 2022
    Assignee: NOK CORPORATION
    Inventor: Kotaro Inoue
  • Patent number: 11408510
    Abstract: To provide a sealing apparatus in which a uniform amount of grease can be applied to an inner circumferential surface of both a main lip and an auxiliary lip in a circumferential direction. A sealing apparatus 10 includes: a main lip 122 which is slidable on a shaft; an auxiliary lip 221 which is provided on a sealed fluid side with respect to the main lip 122 and which is slidable on the shaft; and grease G applied to an inner circumferential surface of both the main lip 122 and the auxiliary lip 221, wherein the sealing apparatus 10 further includes an auxiliary lip-side annular projection 222 which extends from an auxiliary lip 221 side toward a main lip 122 side to a position not in contact with the main lip 122 and which prevents the grease G from entering radially outwardly.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: August 9, 2022
    Assignee: NOK CORPORATION
    Inventor: Takayuki Aihara
  • Publication number: 20220243780
    Abstract: The buffer stopper has a base and an elastic body. The base has a columnar shape having a through hole in a center thereof and having recesses at both ends (virtual surfaces including an end surface of a straight part) thereof, and is formed of a material such as a metal or resin, which is harder than a rubber-like elastic material used as a material for the elastic body. The elastic body is an integrally-molded product made of a rubber-like elastic material. The elastic body includes a pair of end elastic bodies fitted into the recesses of the base and protruding from both ends of the base and connects the pair of end elastic bodies by a central elastic body fitted into the through hole.
    Type: Application
    Filed: July 2, 2020
    Publication date: August 4, 2022
    Applicant: NOK CORPORATION
    Inventors: Takayoshi KURODA, Tomoaki ISHIKAWA
  • Patent number: 11391373
    Abstract: A gasket is provided which gives stable sealing performance even when an insertion member is inclined with respect to an insertion hole. The gasket includes a body portion 121 which is to be fixed in close contact with an inner peripheral surface of an insertion hole 810 while being spaced apart from an insertion member 900, and a flexible portion 122 which is flexurally deformable and provided to extend from the body portion 121 toward an inner peripheral surface side of the body portion 121. The flexible portion 122 is flexurally bent by being pressed by an extended surface portion 920 of the insertion member 900 and comes into close contact with the extended surface portion 920 while being spaced apart from each of a housing 800 and the insertion portion 910.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: July 19, 2022
    Assignee: NOK CORPORATION
    Inventor: Naoki Hagiwara
  • Publication number: 20220221058
    Abstract: A sealing device includes a reinforcing ring formed annularly around an axis and an elastic body part that is formed from an elastic body attached to the reinforcing ring and that is formed annularly around the axis. The reinforcing ring includes a tubular portion having a cylindrical shape around the axis and a flange projecting annularly from an outer end portion of the tubular portion to an inner periphery side. The elastic body part includes a lip portion that is an annular portion covering the flange from an outer side, projecting from the flange toward the outer side in a direction of the axis, and projecting toward the inner periphery side in a radial direction. The lip portion includes a seal lip portion that is an annular portion projecting toward the outer side in the direction of the axis and a secondary lip portion that is an annular portion projecting toward an inner side in the direction of the axis.
    Type: Application
    Filed: June 5, 2020
    Publication date: July 14, 2022
    Applicant: NOK CORPORATION
    Inventor: Masasuke UCHIYAMA
  • Patent number: 11384839
    Abstract: A sealing apparatus 1 is provided with a reinforcing ring 10 that is a member that is annular around an axis x, an elastic-body portion 20 that is formed from an elastic body that is annular around the axis x, an annular garter spring 30, and a lip-pressing ring 40 that is an annular member. The lip-pressing ring 40 is configured so that a seal lip 21 can be inserted into a space on an inner-periphery side thereof, and a value of an inner diameter thereof is configured to be a size no less than a value of an outer diameter of an annular portion that is at least a portion on an outer-periphery side of the seal lip 21. The sealing apparatus can suppress a decrease in tracking a rotary shaft.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: July 12, 2022
    Assignee: NOK CORPORATION
    Inventor: Yuki Sato