Patents Assigned to Nippon Pillar Packing Co., Ltd.
  • Patent number: 11371500
    Abstract: Provided is a floating ring type mechanical seal in which a floating ring is pinched and held between a rotary ring provided in a rotary shaft and a stationary ring provided in a seal casing to be movable in an axial direction while being urged toward the rotary ring so that a relative rotation of the floating ring with respect to the stationary ring is inhibited. The rotary ring is made of a sintered compact of SiC or cemented carbide. A diamond film is formed on a sealing surface sliding on the floating ring in the rotary ring. A diamond film continuous to the diamond film of the sealing surface is formed on an outer peripheral surface of the rotary ring and a rear surface, which is a surface opposite to the sealing surface, in the rotary ring.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: June 28, 2022
    Assignee: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Yuji Sato, Takashi Nishi
  • Publication number: 20220155128
    Abstract: Provided is a liquid sensor or the like that is relatively easy to manufacture. The liquid sensor includes a light emitting element, an optical waveguide, a light receiving element, and a detection circuit. The optical waveguide includes a first pillar portion, a first metal plate, a second pillar portion, and a second metal plate. The first metal plate is embedded in the first pillar portion. The second pillar portion is provided at a position opposing the first pillar portion. The second metal plate is embedded in the second pillar portion. A space for liquid is formed between the first pillar portion and the second pillar portion. The first pillar portion includes a first end surface that faces the light emitting element. The first metal plate includes a first reflecting portion that is tilted relative to the first end surface and reflects light toward the second pillar portion. The second pillar portion includes a second end surface that faces the light receiving element.
    Type: Application
    Filed: October 29, 2021
    Publication date: May 19, 2022
    Applicant: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Akira NAKATSU, Kentaro WATANABE
  • Publication number: 20220155219
    Abstract: Provided is a liquid sensor that can more accurately detect the state of a liquid. The liquid sensor includes a light emitting element, an optical waveguide, a light receiving element, and a detection circuit. The light receiving element is configured to receive light that was emitted by the light emitting element and passed through the optical waveguide. The detection circuit is configured to detect output of the light receiving element. The optical waveguide includes a first pillar portion that extends straight and a second pillar portion that extends straight. The second pillar portion is provided at a position opposing the first pillar portion. A space for liquid is formed between the first pillar portion and the second pillar portion. The first pillar portion includes a first end surface that faces the light emitting element, and a second end surface that is tilted relative to the first end surface and reflects light toward the second pillar portion.
    Type: Application
    Filed: October 29, 2021
    Publication date: May 19, 2022
    Applicant: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Akira NAKATSU, Kentaro WATANABE
  • Patent number: 11320050
    Abstract: A structure for mounting a gasket on a block includes a block with a fluid channel and an annular gasket surrounding an opening of the fluid channel. The block has an annular inner wall and an annular outer wall. The annular inner wall is made of resin and located radially outside the opening of the fluid channel. The annular outer wall is made of resin and located radially outside the annular inner wall. The annular inner wall and the annular outer wall allow an axial side of the gasket to be press-fitted therebetween and are elastically deformable in their radial directions.
    Type: Grant
    Filed: February 18, 2019
    Date of Patent: May 3, 2022
    Assignee: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Atsushi Nakano, Toshihide Iida, Tomoyuki Koike, Tomohiro Adachi
  • Patent number: 11313361
    Abstract: A rolling diaphragm pump that can inhibit an increase in cost with a simple configuration is provided.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: April 26, 2022
    Assignee: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Kazukiyo Teshima, Daisuke Urata
  • Publication number: 20220120366
    Abstract: Each of mechanical seal devices of a rotary joint includes a seal ring and a seal ring attached to a shaft body, and a seal ring and a seal ring attached to a case body. A flow passage that partitions an annular space and connects a flow passage and a flow passage is formed between a sliding portion of the seal rings and a sliding portion of the seal rings. A flow passage that partitions the annular space and connects a flow passage and a flow passage is formed between the sliding portion of a mechanical seal device disposed on one side in the axial direction and the sliding portion of a mechanical seal device disposed on the other side in the axial direction in mechanical seal devices adjacent to each other in the axial direction.
    Type: Application
    Filed: September 25, 2019
    Publication date: April 21, 2022
    Applicant: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Osamu SUZUKI, Yasuyuki OKUNISHI, Shuhei MATSUI, Masanao ISHIJIMA
  • Patent number: 11306819
    Abstract: A gasket includes a first slope at a first axial end. The fluid device includes a second slope that contacts the first slope. The first slope and the second slope have different gradients. The first slope allows at least the first axial end to be deformed along the second slope. The first slope contacts the second slope with a gradient that varies depending on a gradient of the second slope to seal a gap between the first slope and the second slope.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: April 19, 2022
    Assignee: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Atsushi Nakano, Tomohiro Adachi, Tomoyuki Koike, Kazukiyo Teshima, Motoaki Naruo
  • Patent number: 11280434
    Abstract: A resin tube fitting has: a body with an outer sleeve; an inner ring including an insert portion insertable into the outer sleeve to contact the outer sleeve radially, and a press-in portion configured to be pressed into a longitudinal end of the tube; and a union nut configured to be engageable with the body. The body and the inner ring are made of resin, which has a property of contracting in response to change in ambient temperature. A radial contraction rate of the outer sleeve of the body is designed to be higher by 0.09% or more than that of the insert portion of the inner ring.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: March 22, 2022
    Assignee: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Makoto Fujii, Masaki Miyamoto, Tatsuya Fujii, Toshihide Iida, Tomoyuki Koike, Shintaro Makihata
  • Publication number: 20220025996
    Abstract: A first peripheral wall end portion of a conversion adapter is connected to a tubular body across a gasket, and has either an annular protrusion to be pressed into an annular groove on a side surface of the gasket, or an annular groove to allow an annular protrusion projecting from a side surface of the gasket to be pressed thereinto. The first peripheral wall end portion has either an internally threaded portion to allow an externally threaded portion of the tubular body to be screwed thereinto, or an externally threaded portion to allow a nut to be screwed thereonto. The nut also allows an externally threaded portion of the tubular body to be screwed thereinto. A second peripheral wall end portion of the conversion adapter has an externally threaded portion to allow another nut to be screwed thereonto, and then, to allow the sleeve to make contact with the inside.
    Type: Application
    Filed: May 14, 2019
    Publication date: January 27, 2022
    Applicant: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Kiyotaka OHMAE, Masashi KATANAYA, Atsushi NAKANO
  • Publication number: 20220018471
    Abstract: A sleeve, a cylindrical member for connecting a tube to a tubular body of a fitting, includes a first peripheral wall end portion facing a peripheral wall end portion of the tubular body, and a second peripheral wall end portion pressed into an open end of the tube. The first peripheral wall end portion includes either an annular protrusion or groove. The annular protrusion is pressed into an annular groove in the peripheral wall end portion of the tubular body. The annular groove allows an annular protrusion axially projecting from the peripheral wall end portion of the tubular body to be pressed thereinto. The second peripheral wall end portion includes a bulge portion to expand the diameter of the open end of the tube. An outer periphery of the first peripheral wall end portion includes a flange to axially face the peripheral wall end portion of the tubular body.
    Type: Application
    Filed: May 14, 2019
    Publication date: January 20, 2022
    Applicant: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Kiyotaka OHMAE, Masashi KATANAYA, Atsushi NAKANO
  • Patent number: 11215173
    Abstract: A diaphragm pump includes: a housing; a diaphragm; an actuator configured to reciprocate the diaphragm based on a previously selected operation mode out of a plurality of operation modes; a setting device configured to set and send an operation mode and operating conditions; and a control device configured to receive the operation mode and the operating conditions from the setting device, and control the actuator to move the diaphragm forward or backward in accordance with the operation mode and the operating conditions received from the setting device. The plurality of operation modes include a normal operation mode in which the actuator is driven to perform a series of a suction process to suck a fluid and a discharge process to discharge the sucked fluid, and a partial operation mode in which the actuator is driven to perform the series of processes partially.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: January 4, 2022
    Assignee: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Kazukiyo Teshima, Naoto Yamada, Motoaki Naruo
  • Publication number: 20210348686
    Abstract: A gland packing includes a gland packing body made of expanded graphite. The gland packing body has a cylindrical shape, and has a plurality of layers formed in a radial direction. The gland packing body has first and second surfaces, which are both end surfaces in an axial direction. The gland packing further includes an annular first sheet portion made of expanded graphite, an annular second sheet portion made of expanded graphite, an annular first porous member, and an annular second porous member. The first sheet portion is arranged on the first surface. The second sheet portion is arranged on the second surface. The first porous member is arranged on the first sheet portion. The second porous member is arranged on the second sheet portion.
    Type: Application
    Filed: August 22, 2019
    Publication date: November 11, 2021
    Applicant: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Masaru FUJIWARA, Kodai INOUE
  • Publication number: 20210317937
    Abstract: Provided is a rotary joint capable of lubricating a sealing surface of a mechanical seal forming a fluid passage through which a gas flows using a liquid even when the liquid flows through only one fluid passage. A rotary joint 1 includes a plurality of mechanical seals 7 provided in an axial direction in an annular space A between a case body 2 and a shaft body 5 to form a first intermediate flow passage 41 that connects a first outer flow passage 31 and a first inner flow passage 61 of a first fluid passage 11 through which a liquid flows to each other and form a second intermediate flow passage 42 that connects a second outer flow passage 32 and a second inner flow passage 62 of a second fluid passage 12 through which a gas flows to each other.
    Type: Application
    Filed: December 12, 2018
    Publication date: October 14, 2021
    Applicant: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Yoshinori KIKUYAMA, Osamu SUZUKI, Takashi NISHI
  • Publication number: 20210255023
    Abstract: Provided is a liquid sensor capable of relatively accurately detecting the liquid level even if vibration or the like occurs. The liquid sensor is configured to detect a liquid level in a state in which at least a portion of the liquid sensor is immersed in liquid. This liquid sensor includes a substrate. The substrate is provided with a hole. An inner circumferential surface of the substrate is formed around the hole. A first electrode and a second electrode facing the first electrode are formed on the inner circumferential surface. The liquid sensor further includes a detection circuit. The detection circuit is configured to detect capacitance between the first and second electrodes.
    Type: Application
    Filed: February 18, 2021
    Publication date: August 19, 2021
    Applicant: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Tatsunari KOYAMA, Akira NAKATSU
  • Patent number: 11067175
    Abstract: A structure allowing a gasket to be mounted on a fluid device is provided. The gasket includes a ring with a first annular slope at a first axial end. The fluid device includes an inner sleeve with a second annular slope and an outer sleeve radially outside the inner sleeve. An outer periphery of the ring includes an annular contact face that contacts the outer sleeve and an annular non-contact face radially separated from the outer sleeve. The first annular slope contacts an outer periphery of the second slope.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: July 20, 2021
    Assignee: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Tomohiro Adachi, Atsushi Nakano, Tomoyuki Koike, Kazukiyo Teshima, Motoaki Naruo
  • Patent number: 11060518
    Abstract: A reciprocating pump includes: a housing with a fluid channel that includes a pump chamber; a reciprocated member that is disposed in the housing to form the pump chamber, and reciprocable for suction and discharge of fluid; an actuator configured to reciprocate the reciprocated member; and a pressure gauge with a pressure receiving portion, configured to detect pressure of the fluid in the fluid channel via the pressure receiving portion. The housing includes an inner wall facing the fluid channel, and a flexible, membranous portion placed continuously next to the inner wall to face the fluid channel. The pressure gauge is attached to the housing such that the membranous portion is sandwiched between the pressure receiving portion and the fluid channel.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: July 13, 2021
    Assignee: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Kazukiyo Teshima, Daisuke Urata, Naoto Yamada, Takuya Murakami
  • Publication number: 20210190064
    Abstract: A resin member capable of inhibiting generation of particles due to repeated bending thereof is provided. A rolling diaphragm 5 composed of a resin member has one surface formed as a liquid contact surface 37a, repeatedly bends when used, and has flexibility. A surface roughness of the liquid contact surface 37a at a portion 371 that bends is less than 0.40 ?m as an arithmetic average roughness, and a total light reflectance of the liquid contact surface 37a at the portion 371 that bends is not less than 2.0%.
    Type: Application
    Filed: August 1, 2018
    Publication date: June 24, 2021
    Applicant: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Kazukiyo TESHIMA, Naoto YAMADA
  • Patent number: 11035893
    Abstract: The present invention intends to provide a liquid sensor device that achieves both the improvement of durability and the improvement of property determination accuracy. The liquid sensor device includes: an electrode pair 22 that is formed on a sensor board 2 and covered by an insulating protective film 201; a resistance measurement part 302 that supplies AC current to the electrode pair 22 to measure the resistance value of oil 4; a parasitic capacitance storage part 304 that holds the parasitic capacitance Cs of the electrode pair 22; and a property determination part 313 that, on the basis of the resistance value R1 and the parasitic capacitance Cs, determines the deterioration of the oil 4.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: June 15, 2021
    Assignee: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Tatsunari Koyama, Akira Nakatsu
  • Patent number: 11014336
    Abstract: A circuit board according to the present invention includes: a first layer containing a fiber base material, and fusible fluororesin with which the fiber base material is impregnated; and second layers containing non-fusible fluororesin that are arranged on the two surfaces of the first layer.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: May 25, 2021
    Assignee: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Takeshi Okunaga, Miyuki Kobayashi, Tatsuya Tamaki, Kenpei Yamasaki, Tomoki Hayashi
  • Patent number: D925709
    Type: Grant
    Filed: July 21, 2020
    Date of Patent: July 20, 2021
    Assignee: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Tomoyuki Koike, Atsushi Nakano, Tomohiro Adachi, Toshihide Iida