Patents by Inventor Yasuhiro Kuroki
Yasuhiro Kuroki 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).
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Patent number: 11428324Abstract: In an exemplary embodiment, a seal device (10) that seals between a housing (11) and a rotation shaft (20) passing through the housing (11) includes: a floating ring (15) arranged with a gap h with respect to the rotation shaft (20), a seal portion (14) formed by bringing one end face of the floating ring (15) into contact with the housing (11), and a space portion j provided between the floating ring (15) and the housing (11), and the floating ring (15) includes bias means that contactlessly biases the floating ring (15) to the seal portion via the space portion j. The seal device in which the floating ring follows movement of the rotation shaft is capable of exerting a sealing operation so that vibration of the rotation shaft can be reduced.Type: GrantFiled: March 27, 2018Date of Patent: August 30, 2022Inventors: Yuichiro Tokunaga, Hideyuki Inoue, Wataru Kimura, Tetsuya Iguchi, Hidetoshi Kasahara, Jun Hiromatsu, Yasuhiro Kuroki, Ryu Kikuchi
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Patent number: 11199262Abstract: A segment seal is configured to seal an annular clearance between a housing and a rotary shaft in a state in which a pair of seal rings are attached in an unrotatable state between one end portion of the housing and a support member attached to the housing so as to be opposite to the one end portion in an axial direction. The segment seal includes an anti-rotation member placed not to rotate relative to the housing or the support member, provided with a pair of raised portions fitted to the pair of seal rings to prevent rotation of the pair of seal rings, and configured such that at least one of the raised portions has a shape fittable only to either one of the seal rings.Type: GrantFiled: August 2, 2018Date of Patent: December 14, 2021Inventors: Yasuhiro Kuroki, Toru Kono, Akira Urabe
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Patent number: 11085539Abstract: A sealing device includes a floating ring in a space between the outer circumference of a rotating shaft and the inner circumference of a housing, and a multi-layered cylindrical body including a plurality of elastically deformable cylindrical thin plates layered on top of each other provided between an outer peripheral surface of the floating ring and an inner peripheral surface of the housing, so as to impart a radial restoring force against the eccentricity of the rotating shaft to restore it to its center position, and a tangential damping force to reduce the whirling of the rotating shaft.Type: GrantFiled: February 16, 2018Date of Patent: August 10, 2021Assignee: EAGLE INDUSTRY CO., LTD.Inventors: Yuichiro Tokunaga, Hideyuki Inoue, Wataru Kimura, Tetsuya Iguchi, Hidetoshi Kasahara, Jun Hiromatsu, Yasuhiro Kuroki, Ryu Kikuchi
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Patent number: 11078919Abstract: In an exemplary embodiment, a seal device 10 that seals between a housing 11 and a rotation shaft 20 passing through the housing 11 includes a floating ring 15 arranged with a gap h with respect to the rotation shaft 20, wherein the floating ring 15 includes at least one supporting means 18 that supports in the circumferential direction. In the seal device, the floating ring follows movement of the rotation shaft even upon running for a long time, a clearance between the rotation shaft and the seal ring can be properly held, and the sealing operation by the floating ring and the vibration damping function can be exerted, and the seal device is easily assembled.Type: GrantFiled: February 21, 2018Date of Patent: August 3, 2021Assignee: EAGLE INDUSTRY CO., LTDInventors: Yuichiro Tokunaga, Hideyuki Inoue, Wataru Kimura, Tetsuya Iguchi, Hidetoshi Kasahara, Jun Hiromatsu, Yasuhiro Kuroki, Ryu Kikuchi
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Publication number: 20210054936Abstract: In an exemplary embodiment, a seal device (10) that seals between a housing (11) and a rotation shaft (20) passing through the housing (11) includes: a floating ring (15) arranged with a gap h with respect to the rotation shaft (20), a seal portion (14) formed by bringing one end face of the floating ring (15) into contact with the housing (11), and a space portion j provided between the floating ring (15) and the housing (11), and the floating ring (15) includes bias means that contactlessly biases the floating ring (15) to the seal portion via the space portion j. The seal device in which the floating ring follows movement of the rotation shaft is capable of exerting a sealing operation so that vibration of the rotation shaft can be reduced.Type: ApplicationFiled: March 27, 2018Publication date: February 25, 2021Inventors: Yuichiro TOKUNAGA, Hideyuki INOUE, Wataru KIMURA, Tetsuya IGUCHI, Hidetoshi KASAHARA, Jun HIROMATSU, Yasuhiro KUROKI, Ryu KIKUCHI
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Publication number: 20200208742Abstract: A segment seal is configured to seal an annular clearance between a housing and a rotary shaft in a state in which a pair of seal rings are attached in an unrotatable state between one end portion of the housing and a support member attached to the housing so as to be opposite to the one end portion in an axial direction. The segment seal includes an anti-rotation member placed not to rotate relative to the housing or the support member, provided with a pair of raised portions fitted to the pair of seal rings to prevent rotation of the pair of seal rings, and configured such that at least one of the raised portions has a shape fittable only to either one of the seal rings.Type: ApplicationFiled: August 2, 2018Publication date: July 2, 2020Inventors: Yasuhiro KUROKI, Toru KONO, Akira URABE
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Publication number: 20200063871Abstract: In an exemplary embodiment, a sealing device includes a floating ring 5 in a space 4 between the outer circumference of a rotating shaft 3 and the inner circumference of a housing 2, and a multi-layered cylindrical body 10 including a plurality of elastically deformable cylindrical thin plates 11 layered on top of each other provided between an outer peripheral surface of the floating ring 5 and an inner peripheral surface of the housing. The sealing device can impart a radial restoring force against the eccentricity of the rotating shaft to restore it to its center position, and a tangential damping force to reduce the whirling of the rotating shaft.Type: ApplicationFiled: February 16, 2018Publication date: February 27, 2020Inventors: Yuichiro TOKUNAGA, Hideyuki INOUE, Wataru KIMURA, Tetsuya IGUCHI, Hidetoshi KASAHARA, Jun HIROMATSU, Yasuhiro KUROKI, Ryu KIKUCHI
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Publication number: 20200063873Abstract: In an exemplary embodiment, a sealing device includes a floating ring 5 in a space 4 between the outer circumference of a rotating shaft 3 and the inner circumference of a housing 2, and a permeable damping member 10 provided around an outer peripheral portion of the floating ring 5. The sealing device can impart a radial restoring force against the eccentricity of the rotating shaft to restore it to its axis position, and a tangential damping force to reduce the whirling of the rotating shaft.Type: ApplicationFiled: February 16, 2018Publication date: February 27, 2020Inventors: Yuichiro TOKUNAGA, Hideyuki INOUE, Wataru KIMURA, Tetsuya IGUCHI, Hidetoshi KASAHARA, Jun HIROMATSU, Yasuhiro KUROKI, Ryu KIKUCHI
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Publication number: 20200032912Abstract: In an exemplary embodiment, a seal device 10 that seals between a housing 11 and a rotation shaft 20 passing through the housing 11 includes a floating ring 15 arranged with a gap h with respect to the rotation shaft 20, wherein the floating ring 15 includes at least one elastically supporting means 18 that supports in the circumferential direction. In the seal device, the floating ring follows movement of the rotation shaft so that the sealing operation and vibration damping function can be exerted.Type: ApplicationFiled: February 21, 2018Publication date: January 30, 2020Inventors: Yuichiro TOKUNAGA, Hideyuki INOUE, Wataru KIMURA, Tetsuya IGUCHI, Hidetoshi KASAHARA, Jun HIROMATSU, Yasuhiro KUROKI, Ryu KIKUCHI
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Publication number: 20200018401Abstract: In an exemplary embodiment, a seal device for sealing between a housing 11 and a rotating shaft 20 which penetrates through the housing 11 includes a floating ring 15 arranged on the rotating shaft 20 with a first gap h therebetween, wherein the floating ring 15 is provided with a squeeze film damper 14 with a second gap g being formed as a narrow gap between the squeeze film damper 14 and the housing 11. In the seal device, the floating ring can exhibit a sealing action by following the movement of the rotating shaft and can reduce vibrations in the circumferential direction and the radial direction of the rotating shaft.Type: ApplicationFiled: February 21, 2018Publication date: January 16, 2020Inventors: Yuichiro TOKUNAGA, Hideyuki INOUE, Wataru KIMURA, Tetsuya IGUCHI, Hidetoshi KASAHARA, Jun HIROMATSU, Yasuhiro KUROKI, Ryu KIKUCHI
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Publication number: 20200018400Abstract: In exemplary embodiment, a seal device 10 that seals between a housing 11 and a rotation shaft 20 passing through the housing 11 includes a floating ring 15 arranged with a gap h with respect to the rotation shaft 20, wherein the floating ring 15 includes an aligning means 18 that contactlessly aligns a position of the floating ring 15. In the seal device, the automatic aligning operation of the seal ring is maintained even upon running for a long time, a clearance between the rotation shaft and the seal ring can be properly held, and the sealing operation by the seal ring and the vibration damping function can be exerted.Type: ApplicationFiled: February 21, 2018Publication date: January 16, 2020Inventors: Yuichiro TOKUNAGA, Hideyuki INOUE, Wataru KIMURA, Tetsuya IGUCHI, Hidetoshi KASAHARA, Jun HIROMATSU, Yasuhiro KUROKI, Ryu KIKUCHI
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Publication number: 20200011342Abstract: In an exemplary embodiment, a seal device 10 that seals between a housing 11 and a rotation shaft 20 passing through the housing 11 includes a floating ring 15 arranged with a gap h with respect to the rotation shaft 20, wherein the floating ring 15 includes at least one supporting means 18 that supports in the circumferential direction. In the seal device, the floating ring follows movement of the rotation shaft even upon running for a long time, a clearance between the rotation shaft and the seal ring can be properly held, and the sealing operation by the floating ring and the vibration damping function can be exerted, and the seal device is easily assembled.Type: ApplicationFiled: February 21, 2018Publication date: January 9, 2020Inventors: Yuichiro TOKUNAGA, Hideyuki INOUE, Wataru KIMURA, Tetsuya IGUCHI, Hidetoshi KASAHARA, Jun HIROMATSU, Yasuhiro KUROKI, Ryu KIKUCHI
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Publication number: 20200011425Abstract: In an exemplary embodiment, a seal device 10 for sealing between a housing 11 and a rotating shaft 20 which penetrates through the housing 11 includes a floating ring 15 arranged on the rotating shaft 20 with a gap h therebetween, and is provided with a spiral foil 14 arranged between the floating ring 15 and the housing 11. In the seal device, the floating ring exhibits a sealing action by following the movement of the rotating shaft and can damp vibration of the rotating shaft.Type: ApplicationFiled: February 21, 2018Publication date: January 9, 2020Inventors: Yuichiro TOKUNAGA, Hideyuki INOUE, Wataru KIMURA, Tetsuya IGUCHI, Hidetoshi KASAHARA, Jun HIROMATSU, Yasuhiro KUROKI, Ryu KIKUCHI
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Patent number: 9784372Abstract: Provided is a sealing device that increases the lubricity of seal surfaces, prevents leakage of sealed fluids, and prevents excessive heat generation and excessive friction at seal surfaces. Said sealing device, which is of the type that seals a fluid trying to leak from the outer periphery of a sealing surface towards the inner periphery thereof, forms at least two dimples in a circumferential direction in each of a plurality of rows arranged in a radial direction on a sealing surface of a stationary-side sealing element or a rotating-side sealing element. Each dimple is tilted by a dimple angle ? between 0° and 90°, exclusive, such that the tip of that dimple in the direction of rotation is tilted toward the inner periphery side. In each of the plurality of rows of dimples, land areas are formed in the circumferential direction between the proximate tips of adjacent dimples.Type: GrantFiled: May 21, 2010Date of Patent: October 10, 2017Assignee: EAGLE INDUSTRY CO., LTD.Inventors: Tetsuya Iguchi, Kazuhiro Iwashita, Yasuhiro Kuroki
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Patent number: 9316316Abstract: Provided is a segmented seal that is capable of suppressing the progress of wear in a key groove and thereby attains improvement in the durability of a seal ring. The segmented seal includes a key groove (15), as seen in an axial direction, has a groove body portion (15a) extending in a radial direction and a pair of clearance groove portions (15b, 15c) expanding to both sides of the groove body portion (15a) so as to be away from a key (50) on the inner peripheral surface side, and among the pair of clearance groove portions (15b, 15c), the clearance groove portion (15c) on an upstream side in a rotating direction ® of the rotating shaft (200) is configured to expand to an outer peripheral surface side beyond a tip end (50a) on an inner peripheral surface side of the key (50).Type: GrantFiled: September 19, 2013Date of Patent: April 19, 2016Assignee: EAGLE INDUSTRY CO., LTD.Inventor: Yasuhiro Kuroki
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Publication number: 20150369367Abstract: Provided is a segmented seal that is capable of suppressing the progress of wear in a key groove and thereby attains improvement in the durability of a seal ring. The segmented seal includes a key groove (15), as seen in an axial direction, has a groove body portion (15a) extending in a radial direction and a pair of clearance groove portions (15b, 15c) expanding to both sides of the groove body portion (15a) so as to be away from a key (50) on the inner peripheral surface side, and among the pair of clearance groove portions (15b, 15c), the clearance groove portion (15c) on an upstream side in a rotating Direction® of the rotating shaft (200) is configured to expand to an outer peripheral surface side beyond a tip end (50a) on an inner peripheral surface side of the key (50).Type: ApplicationFiled: September 19, 2013Publication date: December 24, 2015Inventor: Yasuhiro KUROKI
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Publication number: 20110233872Abstract: Provided is a sealing device that increases the lubricity of seal surfaces, prevents leakage of sealed fluids, and prevents excessive heat generation and excessive friction at seal surfaces. Said sealing device, which is of the type that seals a fluid trying to leak from the outer periphery of a sealing surface towards the inner periphery thereof, forms at least two dimples in a circumferential direction in each of a plurality of rows arranged in a radial direction on a sealing surface of a stationary-side sealing element or a rotating-side sealing element. Each dimple is tilted by a dimple angle ? between 0° and 90°, exclusive, such that the tip of that dimple in the direction of rotation is tilted toward the inner periphery side. In each of the plurality of rows of dimples, land areas are formed in the circumferential direction between the proximate tips of adjacent dimples.Type: ApplicationFiled: May 25, 2010Publication date: September 29, 2011Inventors: Tetsuya Iguchi, Kazuhiro Iwashita, Yasuhiro Kuroki
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Patent number: 5755042Abstract: Air-blowing nozzles 21 for blowing a hot air are provided in both sides of an electrode sheet 33 for a battery both surfaces of which an electrode compounding agent has been applied to. In each of the air-blowing nozzles 21, a pair of slit-shaped blowholes 65 being extended in the width direction of the electrode sheet 33 are provided on both of the upper and lower sides of the end face part 63. The hot air blown off from a pair of the upper and lower blowholes 65 dries the electrode compounding agent as well as pressurizes a space between the electrode sheet 33 and the end face part 63 to form a pressure room P, and the left and right pressure rooms P hold the electrode sheet 33 to suppress its sway.Type: GrantFiled: January 16, 1997Date of Patent: May 26, 1998Assignees: Toshiba Battery Co., Ltd., Toshiba Kikai Kabushiki KaishaInventors: Gen Takayama, Tsutomu Horikoshi, Shigeo Kasahara, Yoshiyuki Sakai, Toshihiko Kusago, Yasuhiro Kuroki
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Patent number: 5689900Abstract: Air-blowing nozzles 21 for blowing a hot air are provided in both sides of an electrode sheet 33 for a battery both surfaces of which an electrode compounding agent has been applied to. In each of the air-blowing nozzles 21, a pair of slit-shaped blowholes 65 being extended in the width direction of the electrode sheet 33 are provided on both of the upper and lower sides of the end face part 63. The hot air blown off from a pair of the upper and lower blowholes 65 dries the electrode compounding agent as well as pressurizes a space between the electrode sheet 33 and the end face part 63 to form a pressure room P, and the left and right pressure rooms P hold the electrode sheet 33 to suppress its sway.Type: GrantFiled: August 20, 1996Date of Patent: November 25, 1997Assignees: Toshiba Battery Co., Ltd., Toshiba Kikai Kabushiki KaishaInventors: Gen Takayama, Tsutomu Horikoshi, Shigeo Kasahara, Yoshiyuki Sakai, Toshihiko Kusago, Yasuhiro Kuroki
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Patent number: 4966540Abstract: In a molding machine, the front end of a rotary screw is provided with at least one slot communicated with a metering section so as to make uniform the temperature of plasticized resin in a space in front of the rotary screw.Type: GrantFiled: July 7, 1989Date of Patent: October 30, 1990Assignee: Toshiba Kikai Kabushiki KaishaInventors: Masaru Taguchi, Yasuhiro Kuroki, Yoshiharu Uchida, Saburo Kawano