Patents by Inventor Yuya SAKANO

Yuya SAKANO 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).

  • Publication number: 20210215200
    Abstract: A sealing apparatus which is capable of preventing static leakage of a target to be sealed without increasing sliding resistance with respect to a shaft, and a surface processing method of a disk member of the sealing apparatus which is capable of processing a surface of the disk member, such as a slinger, provided at the sealing apparatus. A surface processing method of a disk member of a sealing apparatus for forming a plurality of fine spiral grooves on a surface of the disk member provided at the sealing apparatus has a grinding member having a plurality of fine projections that is moved to an outer edge side while the grinding member is pressed against the surface of the disk member which relatively rotates around an axis, and the sealing apparatus includes a slinger at which a plurality of fine spiral grooves are randomly formed on another side surface of a flange portion.
    Type: Application
    Filed: October 24, 2019
    Publication date: July 15, 2021
    Applicant: NOK CORPORATION
    Inventors: Hisato YONAI, Yuya SAKANO, Masahiko INOUE
  • Publication number: 20210140544
    Abstract: A sealing device seals a gap between an inner member and an outer member that rotate relative to each other. The sealing device includes a sealing member. The sealing member includes a rigid ring including a sleeve part and a flange part, and an elastic ring adhering closely to both surfaces of the flange part. The elastic ring includes an annular circular part and water-discharging protrusions on a side of the sleeve part of the rigid ring. The elastic ring includes an annular part on a side opposite the sleeve part. A mold for manufacturing the sealing member includes a first mold including a cylindrical cavity in which the sleeve part is supported, an annular circular cavity for forming the circular part, protrusion cavities for forming the water-discharging protrusions, and posts disposed in the circular cavity and being brought into contact with the flange part of the rigid ring.
    Type: Application
    Filed: August 9, 2019
    Publication date: May 13, 2021
    Applicant: NOK CORPORATION
    Inventors: Takuya KATO, Yuya SAKANO
  • Publication number: 20210116034
    Abstract: A sealing device disposed between inner and outer members that rotate relative to each other for sealing a gap between the inner and outer members, includes a first sealing member to be mounted on the outer member and a second sealing member to be mounted on the inner member. Water-discharging protrusions protrude in a space between the second sealing member and the first sealing member. The water-discharging protrusions are arranged in a circumferential direction. Each protrusion has an inclined side surface intersecting at an acute angle with a rotational direction in which at least one of the inner and outer members rotates. The first sealing member has an annular labyrinth lip protruding toward the flange part of the second sealing member and is not in contact with the second sealing member, the labyrinth lip overlapping the water-discharging protrusions in radial directions and being disposed radially inside the water-discharging protrusions.
    Type: Application
    Filed: August 9, 2019
    Publication date: April 22, 2021
    Applicant: NOK CORPORATION
    Inventors: Masahiro SEKI, Yuya SAKANO, Toshiki ISAWA
  • Publication number: 20210115973
    Abstract: A sealing device disposed between inner and outer members that rotate relative to each other, and that acts to seal a gap between the inner and outer members, and includes a first sealing member to be mounted to the outer member and a second sealing member to be mounted to the inner member. An annular circular protrusion that protrudes toward an annular part of the first sealing member is supported by the second sealing member, and multiple water-discharge protrusions protrude from an inclined surface of circular protrusion. The water-discharge protrusions are arranged in a circumferential direction. Each protrusion includes an inclined side surface that intersects 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: August 9, 2019
    Publication date: April 22, 2021
    Applicant: NOK CORPORATION
    Inventors: Yuya SAKANO, Shintaro SUGAWARA
  • 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: 20200278028
    Abstract: A sealing apparatus is provided for sealing a gap formed between a shaft and a hole into which the shaft is to be inserted, and a first length is greater than a second length, the first length being defined between a shoulder portion, connecting the base portion and the diameter reducing portion with each other, and a bent portion, connecting the diameter reducing portion and the diameter increasing portion with each other, and the second length being defined between the bent portion and a distal end portion.
    Type: Application
    Filed: May 20, 2020
    Publication date: September 3, 2020
    Inventors: Masahiko INOUE, Yuya SAKANO
  • Patent number: 10746303
    Abstract: To suppress static leakage in a seal device, a seal lip is configured for sliding contact with a seal flange that includes a thread groove exerting a fluid pumping action at a time of shaft rotation. The seal device prevents sealing fluid on the inner-machine side from leaking to the outer-machine side between a housing and a rotating shaft inserted into a shaft hole on the housing. The seal lip is attached to the inner periphery of the shaft hole and the seal flange is attached to the outer periphery of the rotating shaft. A sliding area in the seal flange in sliding contact with the seal lip is a flat surface with no thread grooves, and has an outer peripheral side area and an inner peripheral side area, which each have a thread groove exerting a fluid pumping action when the rotating shaft rotates.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: August 18, 2020
    Assignee: NOK CORPORATION
    Inventors: Yuya Sakano, Shigeyuki Ono, Takumi Yamada
  • Publication number: 20200166138
    Abstract: A sealing apparatus includes a slinger and a seal part. The slinger has a cylindrical part and an annular flange part extending from an inner end part of the cylindrical part perpendicular to an axis of a rotational shaft. The seal part has a main lip configured to slidably contact a flat outer side surface of the flange part of the slinger to thereby seal lubricant. A groove is formed at a portion on the outer side surface of the flange part that contacts the main lip, and the groove is configured to exhibit a discharging action of returning the lubricant when the rotational shaft rotates. A narrowing and miniaturizing structure is formed and configured to reduce a relative contact angle that is formed by the flange part and the main lip when the outer side surface of the flange part contacts the main lip.
    Type: Application
    Filed: January 3, 2020
    Publication date: May 28, 2020
    Inventors: Hisato YONAI, Yuya SAKANO
  • Publication number: 20200124178
    Abstract: A sealing apparatus includes a sealing apparatus body and a slinger. The sealing apparatus body includes a reinforcing ring annular around an axis line, and an elastic body portion attached to the reinforcing ring and annular around the axis line. The slinger includes a flange portion extending toward an outer peripheral side and annular around the axis line. The elastic body portion includes an annular end-face lip contacting the flange portion from another side in the axis line direction. At least one groove is formed on the other side of the flange portion of the slinger. At least one circumferential-direction projection is formed on an inner peripheral surface of the end-face lip. The circumferential-direction projection extends in an annular shape around the axis line and projects between the inner peripheral surface of the end-face lip and a surface of the flange portion on the other side.
    Type: Application
    Filed: December 17, 2019
    Publication date: April 23, 2020
    Inventors: Yuya SAKANO, Hiroki MATSUI, Kokichi HAMAMOTO, Takehiro NAKAGAWA, Hisato YONAI
  • Publication number: 20200096112
    Abstract: A sealing apparatus 1 includes a sealing apparatus body 2 and a slinger 3. The sealing apparatus body 2 includes an annular reinforcing ring 10 and an annular elastic body portion 20. The slinger 3 includes a flange portion 31 which is an annular portion extending toward an outer periphery side. The elastic body portion 20 includes an annular end-face lip 21 extending toward an inner side and contacting an outer side surface 31d of the flange portion 31. At least one shallow groove 33 is formed on the outer side surface 31d of the flange portion 31 of the slinger 3.
    Type: Application
    Filed: November 27, 2019
    Publication date: March 26, 2020
    Inventors: Sosuke ITO, Masahiko INOUE, Hisato YONAI, Yuya SAKANO
  • Patent number: 10544865
    Abstract: In a sealing device having a combination of a seal lip and a seal flange which slidably come into contact with each other, and having a thread groove in an axial end face of the seal flange, the seal lip installed to a not-rotating housing side slidably comes into contact with an axial end face of the seal flange in a rotating shaft side, and the thread groove achieves a fluid pumping action at the rotating time in an axial end face of the seal flange. The thread groove has an inner peripheral side inclined surface as a part of an inner surface thereof, and an angle formed between an inner peripheral surface of a leading end portion of the seal lip and the inner peripheral side inclined surface is set to a range of 0 degree┬▒3 degrees. The sealing device can suppress generation of a static leakage.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: January 28, 2020
    Assignee: NOK CORPORATION
    Inventors: Yuya Sakano, Yoshihisa Yamaguchi, Hideharu Hyakutake, Masaaki Yagi, Yoshimi Imamoto
  • Publication number: 20200011423
    Abstract: A sealing apparatus 1 includes a sealing apparatus body 2 and a slinger 3. The sealing apparatus body 2 includes an annular reinforcing ring 10 and an annular elastic body portion 20 formed of an elastic body mounted on the reinforcing ring 10. The slinger 3 includes a flange portion 31 which is an annular portion extending toward an outer peripheral side. The elastic body portion 20 includes an end-face lip 21 which is an annular lip extending toward an inner side and contacts the flange portion 31 from an outer side. At least one groove 33 is formed on an outer side of the flange portion 31 of the slinger 3, on a surface of the end-face lip 21 on an inner peripheral side, a plurality of radial projections 23 are formed side by side in a circumferential direction, and at least one circumferential projection 24 is formed.
    Type: Application
    Filed: September 20, 2019
    Publication date: January 9, 2020
    Inventors: Sosuke ITO, Masahiko INOUE, Yuya SAKANO, Hiroki MATSUI, Kokichi HAMAMOTO, Takehiro NAKAGAWA, Hisato YONAI
  • Publication number: 20190277403
    Abstract: A sealing apparatus which seals an annular gap of a hole into which a shaft is to be inserted, includes a sealing apparatus body to be fitted into the hole, and a slinger to be attached to the shaft. The sealing apparatus body includes a reinforcing ring annular around an axis line, and an elastic body portion attached to the reinforcing ring and annular around the axis line. The slinger includes a flange portion extending toward an outer periphery side and annular around the axis line. The elastic body portion includes an end-face lip extending on one side in an axis line direction, contacting the flange portion from another side in the axis line direction, and annular around the axis line.
    Type: Application
    Filed: May 28, 2019
    Publication date: September 12, 2019
    Inventors: Yuya SAKANO, Hiroki MATSUI, Kokichi HAMAMOTO, Takehiro NAKAGAWA, Hisato YONAI, Masahiko INOUE
  • Patent number: 10267422
    Abstract: The invention provides a sealing device which can suppress occurrence of static leakage and has a seal lip and a seal flange which are slidably in contact with each other, and a screw groove arranged in an end face, in an axial direction, of the seal flange. In the sealing device, the seal lip attached to a non-rotational housing side is slidably in contact with the end face, in the axial direction, of the seal flange on the rotational axis side, and which has the screw groove arranged in the end face, in the axial direction, of the seal flange so as to exert a fluid pumping action during rotation, is characterized in that the screw groove has an inner-circumferential-side inclined surface and an outer-circumferential-side inclined surface as the internal surfaces, and has a groove bottom part in a circular arc cross-sectional shape that interconnects both of the inclined surfaces.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: April 23, 2019
    Assignee: NOK Corporation
    Inventors: Yoshihisa Yamaguchi, Hideharu Hyakutake, Yuya Sakano
  • Publication number: 20180347702
    Abstract: To suppress static leakage in a seal device, a seal lip is configured for sliding contact with a seal flange that includes a thread groove exerting a fluid pumping action at a time of shaft rotation. The seal device prevents sealing fluid on the inner-machine side from leaking to the outer-machine side between a housing and a rotating shaft inserted into a shaft hole on the housing. The seal lip is attached to the inner periphery of the shaft hole and the seal flange is attached to the outer periphery of the rotating shaft. A sliding area in the seal flange in sliding contact with the seal lip is a flat surface with no thread grooves, and has an outer peripheral side area and an inner peripheral side area, which each have a thread groove exerting a fluid pumping action when the rotating shaft rotates.
    Type: Application
    Filed: November 25, 2016
    Publication date: December 6, 2018
    Applicant: NOK CORPORATION
    Inventors: Yuya SAKANO, Shigeyuki ONO, Takumi YAMADA
  • Publication number: 20180066757
    Abstract: In a sealing device having a combination of a seal lip and a seal flange which slidably come into contact with each other, and having a thread groove in an axial end face of the seal flange, the seal lip installed to a not-rotating housing side slidably comes into contact with an axial end face of the seal flange in a rotating shaft side, and the thread groove achieves a fluid pumping action at the rotating time in an axial end face of the seal flange. The thread groove has an inner peripheral side inclined surface as a part of an inner surface thereof, and an angle formed between an inner peripheral surface of a leading end portion of the seal lip and the inner peripheral side inclined surface is set to a range of 0 degree ┬▒3 degrees. The sealing device can suppress generation of a static leakage.
    Type: Application
    Filed: March 25, 2016
    Publication date: March 8, 2018
    Inventors: Yuya SAKANO, Yoshihisa YAMAGUCHI, Hideharu HYAKUTAKE, Masaaki YAGI, Yoshimi IMAMOTO
  • Publication number: 20180023707
    Abstract: The invention provides a sealing device which can suppress occurrence of static leakage and has a seal lip and a seal flange which are slidably in contact with each other, and a screw groove arranged in an end face, in an axial direction, of the seal flange. In the sealing device, the seal lip attached to a non-rotational housing side is slidably in contact with the end face, in the axial direction, of the seal flange on the rotational axis side, and which has the screw groove arranged in the end face, in the axial direction, of the seal flange so as to exert a fluid pumping action during rotation, is characterized in that the screw groove has an inner-circumferential-side inclined surface and an outer-circumferential-side inclined surface as the internal surfaces, and has a groove bottom part in a circular arc cross-sectional shape that interconnects both of the inclined surfaces.
    Type: Application
    Filed: January 6, 2016
    Publication date: January 25, 2018
    Inventors: Yoshihisa YAMAGUCHI, Hideharu HYAKUTAKE, Yuya SAKANO