Patents by Inventor Masayuki Tanida

Masayuki Tanida has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11428322
    Abstract: A sealing apparatus is provided that is capable of inhibiting a degradation in electrical conductivity performance. The sealing apparatus includes an outer seal part and an inner seal part, and conductive grease housed in a space. An outer elastic body part of the outer seal part is formed from an elastic body having electrical conductivity and includes a dust lip, a conduction lip, and a gasket part. At an annular fitting surface, the inner seal part is attached to the outer seal part. An inner elastic body part of the inner seal part is formed from an elastic body having electrical conductivity and includes a grease lip. The outer seal part has a spring that is put on an outer periphery side of the conduction lip to press the conduction lip against an inner peripheral member.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: August 30, 2022
    Inventors: Masayuki Tanida, Masaru Syonai, Takuya Ito, Kenya Yoshioka
  • Patent number: 11365807
    Abstract: A sealing apparatus includes a reinforcing ring, an elastic body portion formed of an elastic body having conductivity, and a conductive grease. The elastic body portion includes a base portion, a lip portion which extends from the base portion, and a tension force applying member which is an elastic member in an annular shape. The tension force applying member is mounted on an outer peripheral side of the lip portion at a lip tip end portion to apply a tension force which presses a lip contact end against an outer peripheral surface of a shaft. The conductive grease is applied to at least a portion of an inner peripheral surface of the elastic body portion which faces an inner periphery side.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: June 21, 2022
    Assignee: NOK CORPORATION
    Inventors: Takuya Ito, Masayuki Tanida
  • Publication number: 20220163117
    Abstract: A sealing device capable of suppressing depletion of lubricant is provided. A sliding surface of a side lip 220 at a position away from a distal end of the side lip 220 is provided with a plurality of annular grooves 222 adjacent each other, each of all parts that form annular protrusions 223 between adjacent annular grooves 222 protrudes most at a center in a width direction thereof, with an amount of protrusion gradually decreasing with increasing separation from the center, and both sides of the center in the width direction are symmetric in shape. A tip portion of the sliding surface of the side lip 220 on the distal side of a region, which is provided with the plurality of annular grooves 222, is configured to make a planar contact with an end face of the annular member.
    Type: Application
    Filed: April 15, 2020
    Publication date: May 26, 2022
    Applicant: NOK CORPORATION
    Inventors: Toshiki WATANABE, Kokichi HAMAMOTO, Tomoaki NISHIMURA, Masayuki TANIDA
  • Publication number: 20220145936
    Abstract: A sealing device has a reinforcement ring in an annular shape around an axis, an elastic portion which is attached to the reinforcement ring and is an elastic body in an annular shape around the axis and having conductivity, and conductive grease. The elastic portion has a base, a lip portion which extends from the base along the axis, and at least one dust lip in an annular shape around the axis. The lip portion has, at a tip end, a lip tip end portion having a lip contact surface which is formed to be capable of contacting an outer peripheral surface of a shaft such that the outer peripheral surface of the shaft is slidable. The lip contact surface has a surface in an annular shape which faces the outer peripheral surface of the shaft. The conductive grease is adherent in at least a part of an inter-lip space which is a space in an annular shape formed between the lip contact surface and the dust lip in a direction of the axis.
    Type: Application
    Filed: April 20, 2020
    Publication date: May 12, 2022
    Inventors: Yuki SATO, Takuya ITO, Hiromi SUGIHARA, Masayuki TANIDA
  • Patent number: 11261968
    Abstract: A sealing device includes an annular reinforcing ring and an elastic body part, and the elastic body part has an annular seal lip, an annular dust lip, and an annular side lip. The side lip extends toward the outer side on an outer periphery side of the dust lip, and includes a distal end portion, a middle portion, and a root portion. The root portion is an annular portion, the middle portion is a portion that is outside of the root portion, and an annular portion that increases in diameter toward an outward side, and the distal end portion is a portion that is outside the middle portion, and an annular portion that increases in diameter toward an outward side. The distal end portion is bent to an inner periphery side from the middle portion.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: March 1, 2022
    Assignee: NOK CORPORATION
    Inventors: Hideaki Nagahamaya, Kokichi Hamamoto, Masayuki Tanida, Takehiro Nakagawa
  • Publication number: 20210041024
    Abstract: A sealing apparatus is provided that is capable of inhibiting a degradation in electrical conductivity performance. The sealing apparatus includes an outer seal part and an inner seal part, and conductive grease housed in a space. An outer elastic body part of the outer seal part is formed from an elastic body having electrical conductivity and includes a dust lip, a conduction lip, and a gasket part. At an annular fitting surface, the inner seal part is attached to the outer seal part. An inner elastic body part of the inner seal part is formed from an elastic body having electrical conductivity and includes a grease lip. The outer seal part has a spring that is put on an outer periphery side of the conduction lip to press the conduction lip against an inner peripheral member.
    Type: Application
    Filed: June 25, 2019
    Publication date: February 11, 2021
    Applicant: NOK CORPORATION
    Inventors: Masayuki TANIDA, Masaru SYONAI, Takuya ITO, Kenya YOSHIOKA
  • Publication number: 20200292079
    Abstract: A sealing apparatus includes a reinforcing ring, an elastic body portion formed of an elastic body having conductivity, and a conductive grease. The elastic body portion includes a base portion, a lip portion which extends from the base portion, and a tension force applying member which is an elastic member in an annular shape. The tension force applying member is mounted on an outer peripheral side of the lip portion at a lip tip end portion to apply a tension force which presses a lip contact end against an outer peripheral surface of a shaft. The conductive grease is applied to at least a portion of an inner peripheral surface of the elastic body portion which faces an inner periphery side.
    Type: Application
    Filed: May 28, 2020
    Publication date: September 17, 2020
    Applicant: NOK CORPORATION
    Inventors: Takuya ITO, Masayuki TANIDA
  • Patent number: 10260635
    Abstract: A sealing apparatus for sealing between a rotary shaft 11 and a housing 12 that can be rotated relative to each other, having a circular ring body 3 provided on the rotary shaft 11 and a seal lip body 6 made of a flexible material provided on the housing 12, wherein the seal lip body 6 has a discharge fin 8 on the outer peripheral side of a sealing part 6a which makes sliding contact with the circular ring body 3, and when the two members 11 and 12 rotate relative to each other, the surface of the discharge fin 8 on the side advancing relative to the circular ring body 3 composes an inclined surface receding more on the front edge side than the base end side of the discharge fin 8, and by this inclined surface, oil is discharged away from the sealing portion 6a.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: April 16, 2019
    Assignee: NOK CORPORATION
    Inventor: Masayuki Tanida
  • Patent number: 10190691
    Abstract: A sealing device between a shaft hole formed on a housing and a rotary shaft, is provided with a rotating seal member fixed to the rotary shaft that rotates integrally with the rotary shaft, and a fixed seal member fixed to an inner surface of the shaft hole. The fixed seal member has a lip contacting the rotary shaft and an axial dust lip contacting the rotating seal member. The rotating seal member is formed by a rigid body, and an opening is formed on the rotating seal member connecting to a space defined by the rotary shaft, the lip and the axial dust lip of the fixed seal member, and the rotating seal member. A deformation member is disposed on the opening of the rotating seal member that has higher elasticity than the rotating seal member, which blocks the opening, and deforms based on the pressure in the space.
    Type: Grant
    Filed: August 5, 2017
    Date of Patent: January 29, 2019
    Assignee: NOK CORPORATION
    Inventors: Masayuki Tanida, Masaaki Yagi
  • Publication number: 20180209546
    Abstract: A sealing device includes an annular reinforcing ring and an elastic body part, and the elastic body part has an annular seal lip, an annular dust lip, and an annular side lip. The side lip extends toward the outer side on an outer periphery side of the dust lip, and includes a distal end portion, a middle portion, and a root portion. The root portion is an annular portion, the middle portion is a portion that is outside of the root portion, and an annular portion that increases in diameter toward an outward side, and the distal end portion is a portion that is outside the middle portion, and an annular portion that increases in diameter toward an outward side. The distal end portion is bent to an inner periphery side from the middle portion.
    Type: Application
    Filed: March 22, 2018
    Publication date: July 26, 2018
    Inventors: Hideaki NAGAHAMAYA, Kokichi HAMAMOTO, Masayuki TANIDA, Takehiro NAKAGAWA
  • Publication number: 20180045315
    Abstract: A sealing device between a shaft hole formed on a housing and a rotary shaft, is provided with a rotating seal member fixed to the rotary shaft that rotates integrally with the rotary shaft, and a fixed seal member fixed to an inner surface of the shaft hole. The fixed seal member has a lip contacting the rotary shaft and an axial dust lip contacting the rotating seal member. The rotating seal member is formed by a rigid body, and an opening is formed on the rotating seal member connecting to a space defined by the rotary shaft, the lip and the axial dust lip of the fixed seal member, and the rotating seal member. A deformation member is disposed on the opening of the rotating seal member that has higher elasticity than the rotating seal member, which blocks the opening, and deforms based on the pressure in the space.
    Type: Application
    Filed: August 5, 2017
    Publication date: February 15, 2018
    Inventors: Masayuki TANIDA, Masaaki YAGI
  • Publication number: 20180045318
    Abstract: A sealing apparatus for sealing between a rotary shaft 11 and a housing 12 that can be rotated relative to each other, having a circular ring body 3 provided on the rotary shaft 11 and a seal lip body 6 made of a flexible material provided on the housing 12, wherein the seal lip body 6 has a discharge fin 8 on the outer peripheral side of a sealing part 6a which makes sliding contact with the circular ring body 3, and when the two members 11 and 12 rotate relative to each other, the surface of the discharge fin 8 on the side advancing relative to the circular ring body 3 composes an inclined surface receding more on the front edge side than the base end side of the discharge fin 8, and by this inclined surface, oil is discharged away from the sealing portion 6a.
    Type: Application
    Filed: August 10, 2017
    Publication date: February 15, 2018
    Inventor: Masayuki TANIDA
  • Patent number: 8714561
    Abstract: To improve durability of a seal lip (4) of an oil seal (1) in slidably contact with the peripheral surface of a shaft (23), a lubricating oil supply section (11) for collecting adhered oil and dropping it on the shaft (23) is provided at a forward end portion of an installation section (2), the lubricating oil supply section (11) has projections (12) formed on the inner peripheral surface of the installation section (2) to collect oil on the surface thereof, the surface of each projection (12) has a recess (13) for temporarily accumulating oil, guidance projections, or a slope for collecting the oil, and dams are formed on a forward end face (2a) of the installation section (2) to block the oil flowing down along the circumferential direction on the forward end face (2a) and guides the oil toward each projection (12).
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: May 6, 2014
    Assignee: Nok Corporation
    Inventors: Satoshi Yamanaka, Takehiro Nakagawa, Masayuki Tanida, Hideharu Hyakutake, Hiroki Matsui, Hideyuki Furuyama, Go Kanzaki, Shinya Takeda, Kei Sasaki, Akira Yamaguchi
  • Patent number: 8413995
    Abstract: For an oil seal (1) having a seal lip (6) with a slope (7) at the side of sealed fluid and a slope (8) at the side opposite to the sealed fluid, and a screw section (9) provided on the slope (8) for pushing back sealed fluid by a pumping effect at a time of rotation, in order to achieve low torque characteristics based on fluid lubrication by increasing the thickness of an oil film on sliding surfaces, an intermediate surface (10) is provided between the slopes (7, 8), and an oppositely threaded screw section (11) for sucking the sealed fluid by a pumping effect is provided on the intermediate surface (10) without reaching the boundary (13) between the intermediate surface (10) and the slope (8), so that a threadless region is provided in the entire circumference between the screw section (11) and the boundary (13).
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: April 9, 2013
    Assignee: NOK Corporation
    Inventors: Hiroki Matsui, Masayuki Tanida, Hirotaka Mizuta, Hideyuki Furuyama, Ken Yoshikawa, Yuki Sato
  • Patent number: 8387992
    Abstract: To reduce an axial installation width of a sealing device 1 comprising an oil seal 5 mounted in an inner periphery of a shaft hole 3 of a housing 2 and slidably contacted with an outer periphery of a rotating shaft 4 and a magnetic encoder 6 mounted on the rotating shaft 4 so as to be rotated therewith, as well as to improve sealing performance, the oil seal 5 is provided with a metal ring 7 having at least a part thereof disposed at an inner periphery side of the cylindrical portion 10b in the magnetic encoder 6 so that the oil seal 5 and magnetic encoder 6 are overlapped with each other in an axial direction, and the oil seal 5 is provided with a seal lip 8e formed with a rubber-like elastic body and disposed towards an interior side A of a housing.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: March 5, 2013
    Assignee: NOK Corporation
    Inventors: Masayuki Tanida, Kenichi Yarimizu
  • Patent number: 8220803
    Abstract: To improve durability of a seal lip (4) of an oil seal (1) in slidably contact with the peripheral surface of a shaft (23), a lubricating oil supply section (11) for collecting adhered oil and dropping it on the shaft (23) is provided at a forward end portion of an installation section (2), the lubricating oil supply section (11) has projections (12) formed on the inner peripheral surface of the installation section (2) to collect oil on the surface thereof, the surface of each projection (12) has a recess (13) for temporarily accumulating oil, guidance projections, or a slope for collecting the oil, and dams are formed on a forward end face (2a) of the installation section (2) to block the oil flowing down along the circumferential direction on the forward end face (2a) and guides the oil toward each projection (12).
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: July 17, 2012
    Assignee: NOK Corporation
    Inventors: Satoshi Yamanaka, Takehiro Nakagawa, Masayuki Tanida, Hideharu Hyakutake, Hiroki Matsui, Hideyuki Furuyama, Go Kanzaki, Shinya Takeda, Kei Sasaki, Akira Yamaguchi
  • Publication number: 20120086173
    Abstract: To improve durability of a seal lip (4) of an oil seal (1) in slidably contact with the peripheral surface of a shaft (23), a lubricating oil supply section (11) for collecting adhered oil and dropping it on the shaft (23) is provided at a forward end portion of an installation section (2), the lubricating oil supply section (11) has projections (12) formed on the inner peripheral surface of the installation section (2) to collect oil on the surface thereof, the surface of each projection (12) has a recess (13) for temporarily accumulating oil, guidance projections, or a slope for collecting the oil, and dams are formed on a forward end face (2a) of the installation section (2) to block the oil flowing down along the circumferential direction on the forward end face (2a) and guides the oil toward each projection (12).
    Type: Application
    Filed: October 31, 2011
    Publication date: April 12, 2012
    Inventors: Satoshi Yamanaka, Takehiro Nakagawa, Masayuki Tanida, Hideharu Hyakutake, Hiroki Matsui, Hideyuki Furuyama, Go Kanzaki, Shinya Takeda, Kei Sasaki, Akira Yamaguchi
  • Publication number: 20120080855
    Abstract: To improve durability of a seal lip (4) of an oil seal (1) in slidably contact with the peripheral surface of a shaft (23), a lubricating oil supply section (11) for collecting adhered oil and dropping it on the shaft (23) is provided at a forward end portion of an installation section (2), the lubricating oil supply section (11) has projections (12) formed on the inner peripheral surface of the installation section (2) to collect oil on the surface thereof, the surface of each projection (12) has a recess (13) for temporarily accumulating oil, guidance projections, or a slope for collecting the oil, and dams are formed on a forward end face (2a) of the installation section (2) to block the oil flowing down along the circumferential direction on the forward end face (2a) and guides the oil toward each projection (12).
    Type: Application
    Filed: October 31, 2011
    Publication date: April 5, 2012
    Inventors: Satoshi Yamanaka, Takehiro Nakagawa, Masayuki Tanida, Hideharu Hyakutake, Hiroki Matsui, Hideyuki Furuyama, Go Kanzaki, Shinya Takeda, Kei Sasaki, Akira Yamaguchi
  • Patent number: D802104
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: November 7, 2017
    Assignee: NOK CORPORATION
    Inventors: Hideaki Nagahamaya, Kokichi Hamamoto, Masayuki Tanida, Takehiro Nakagawa
  • Patent number: D865134
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: October 29, 2019
    Assignee: NOK CORPORATION
    Inventors: Hideaki Nagahamaya, Kokichi Hamamoto, Masayuki Tanida, Takehiro Nakagawa