Patents by Inventor Arito Mizobe
Arito Mizobe 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: 10799950Abstract: A nozzle structure for discharging molten steel with improved sealing performance. The nozzle structure comprises: a molten steel discharge path having an inner bore; and one or more joints through which the molten steel discharge path is divided at one or more positions in a orthogonal direction with respect to an upward-downward direction of discharge of molten steel, and which join the molten steel discharge path. An inner bore sleeve is formed of a refractory material, and provided on an inner bore surface of the nozzle structure to extend in the upward-downward direction across at least one of the joints.Type: GrantFiled: November 9, 2016Date of Patent: October 13, 2020Assignee: KROSAKIHARIMA CORPORATIONInventors: Shinichi Fukunaga, Takahiro Kuroda, Takashi Sadano, Takuya Okada, Arito Mizobe
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Patent number: 10799942Abstract: A flat immersion nozzle stabilizes the discharging flow of molten steel thereby stabilizing the molten steel surface in a mold, namely, decreasing the fluctuation thereof. In the immersion nozzle having a flat shape in which a width Wn of an inner hole is greater than a thickness Tn of the inner hole, a central protrusion portion (1) is disposed in a center section of a wall surface in a width direction of a flat section. Wp/Wn, a ratio of a length Wp of the central protrusion portion in the width direction to Wn, is 0.2 or more and 0.7 or less. The central protrusion portion (1) is disposed symmetrically as a pair; and a total length Tp in the thickness direction of the pair of the central protrusion portions is 0.15 or more and 0.75 or less of Tn.Type: GrantFiled: September 13, 2016Date of Patent: October 13, 2020Assignee: KROSAKIHARIMA CORPORATIONInventors: Shinichi Fukunaga, Arito Mizobe, Kenichi Oki, Hiroki Furukawa
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Publication number: 20200188991Abstract: A flat immersion nozzle stabilizes the discharging flow of molten steel thereby stabilizing the molten steel surface in a mold, namely, decreasing the fluctuation thereof. In the immersion nozzle having a flat shape in which a width Wn of an inner hole is greater than a thickness Tn of the inner hole, a central protrusion portion (1) is disposed in a center section of a wall surface in a width direction of a flat section. Wp/Wn, a ratio of a length Wp of the central protrusion portion in the width direction to Wn, is 0.2 or more and 0.7 or less. The central protrusion portion (1) is disposed symmetrically as a pair; and a total length Tp in the thickness direction of the pair of the central protrusion portions is 0.15 or more and 0.75 or less of Tn.Type: ApplicationFiled: September 13, 2016Publication date: June 18, 2020Applicant: KROSAKIHARIMA CORPORATIONInventors: Shinichi FUKUNAGA, Arito MIZOBE, Kenichi OKI, Hiroki FURUKAWA
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Publication number: 20190030599Abstract: A nozzle structure for discharging molten steel with improved sealing performance. The nozzle structure comprises: a molten steel discharge path having an inner bore; and one or more joints through which the molten steel discharge path is divided at one or more positions in a orthogonal direction with respect to an upward-downward direction of discharge of molten steel, and which join the molten steel discharge path. An inner bore sleeve is formed of a refractory material, and provided on an inner bore surface of the nozzle structure to extend in the upward-downward direction across at least one of the joints.Type: ApplicationFiled: November 9, 2016Publication date: January 31, 2019Applicant: KROSAKIHARIMA CORPORATIONInventors: Shinichi FUKUNAGA, Takahiro KURODA, Takashi SADANO, Takuya OKADA, Arito MIZOBE
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Patent number: 9718128Abstract: With a view to adding, to an upper nozzle formed with a bore having a shape capable of creating a less energy loss or smooth (constant) molten steel flow to suppress the occurrence of adhesion of inclusions and metals in molten steel, a gas injection function to thereby further suppress the occurrence of the adhesion, the present invention provides a method of using an upper nozzle configured to have a cross-sectional shape of a wall surface defining the bore, taken along an axis of the bore, comprising a curve represented by the following formula: log(r (z))=(1/n)×log((H+L)/(H+z))+log(r (L)) (n=1.5 to 6), where: L is a length of the upper nozzle; H is a calculational hydrostatic head height; and r (z) is an inner radius of the bore at a position downwardly away from an upper edge of the bore by a distance z. The method comprises using the upper nozzle in such a manner as to satisfy the following relationship: RG?4.Type: GrantFiled: December 12, 2012Date of Patent: August 1, 2017Assignee: KROSAKIHARIMA CORPORATIONInventors: Arito Mizobe, Kento Furukawa, Tetsuo Tsuduki, Masaki Yamamoto, Joji Kurisu
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Publication number: 20150196954Abstract: With a view to adding, to an upper nozzle formed with a bore having a shape capable of creating a less energy loss or smooth (constant) molten steel flow to suppress the occurrence of adhesion of inclusions and metals in molten steel, a gas injection function to thereby further suppress the occurrence of the adhesion, the present invention provides a method of using an upper nozzle configured to have a cross-sectional shape of a wall surface defining the bore, taken along an axis of the bore, comprising a curve represented by the following formula: log(r (z))=(1/n)×log((H+L)/(H+z))+log(r (L)) (n=1.5 to 6), where: L is a length of the upper nozzle; H is a calculational hydrostatic head height; and r (z) is an inner radius of the bore at a position downwardly away from an upper edge of the bore by a distance z. The method comprises using the upper nozzle in such a manner as to satisfy the following relationship: RG?4.Type: ApplicationFiled: December 12, 2012Publication date: July 16, 2015Applicant: KROSAKIHARIMA CORPORATIONInventors: Arito Mizobe, Kento Furukawa, Tetsuo Tsuduki, Masaki Yamamoto, Joji Kurisu
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Patent number: 8870041Abstract: The immersion nozzle for continuous casting, including a tubular body with a bottom, a pair of first outlets, and a pair of second outlets, wherein at least a lower section of the tubular body has a rectangular flat cross section; the two opposing first outlets are disposed in narrow sidewalls at the lower section; the pair of second outlets is disposed at the bottom; each of the first outlets is partitioned by a partitioning section formed at the first outlet into an upper outlet and a lower outlet; ridges formed between the partitioning sections respectively project into a passage from a wide inner wall of the passage; the pair of second outlets is disposed symmetrically to a central axis of the tubular body such that virtual faces extended from tilted faces of the second outlets intersect with each other in the passage.Type: GrantFiled: March 9, 2012Date of Patent: October 28, 2014Assignee: Krosaki Harima CorporationInventors: Takahiro Kuroda, Jouji Kurisu, Hiroki Furukawa, Arito Mizobe
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Patent number: 8469243Abstract: Provided is a molten metal discharge nozzle capable of suppressing turbulence in a molten metal stream passing through an inner bore thereof, with a simple structure. A cross-sectional shape of a wall surface of the inner bore, taken along an axis of the inner bore, comprises a part or an entirety of a curved line expressed by the following formula: log(r(z))=(1/n)×log((Hc+L)/(Hc+z))+log(r(L)) (1), where: 6?n?1.Type: GrantFiled: June 16, 2010Date of Patent: June 25, 2013Assignee: Krosakiharima CorporationInventors: Arito Mizobe, Hideaki Kawabe, Manabu Kimura
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Patent number: 8418893Abstract: It is intended to uniform and straighten a molten steel stream flowing out of a discharge port of an immersion nozzle, and thus suppress mold powder entrapment in the vicinity of the immersion nozzle. The immersion nozzle comprises a tubular-shaped straight nozzle body formed to extend in a vertical longitudinal direction and adapted to allow molten steel from a molten-steel inlet provided at an upper end thereof to pass downwardly therethrough, and a pair of discharge ports provided in a lower portion of the straight nozzle body in bilaterally symmetrical relation and adapted to discharge the molten steel from a lateral surface of the straight nozzle body in a lateral direction.Type: GrantFiled: June 10, 2010Date of Patent: April 16, 2013Assignee: Krosakiharima CorporationInventors: Arito Mizobe, Kouichi Tachikawa
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Publication number: 20120248157Abstract: The immersion nozzle for continuous casting, including a tubular body with a bottom, a pair of first outlets, and a pair of second outlets, wherein at least a lower section of the tubular body has a rectangular flat cross section; the two opposing first outlets are disposed in narrow sidewalls at the lower section; the pair of second outlets is disposed at the bottom; each of the first outlets is partitioned by a partitioning section formed at the first outlet into an upper outlet and a lower outlet; ridges formed between the partitioning sections respectively project into a passage from a wide inner wall of the passage; the pair of second outlets is disposed symmetrically to a central axis of the tubular body such that virtual faces extended from tilted faces of the second outlets intersect with each other in the passage.Type: ApplicationFiled: March 9, 2012Publication date: October 4, 2012Applicant: Krosaki Harima CorporationInventors: Takahiro KURODA, Jouji KURISU, Hiroki FURUKAWA, Arito MIZOBE
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Publication number: 20120217271Abstract: Provided is a molten metal discharge nozzle which has a bore configuration capable of creating a low-energy loss and smooth (stabilized) molten metal flow to suppress the occurrence of an adhesion matter. In the molten metal discharge nozzle, a radius r(0) of an upper end (12) of a bore (11) thereof is 1.5 times or more a radius r(L) of a lower end (13) of the bore, and a cross-sectional shape of a bore wall surface 14 taken along an axis of the bore has no bend point. Further, a radius r(z) of the bore at a position downwardly away from the upper end of the bore by a distance z (where L is an axial length of the bore) is in a range between [[L/{(r(0)/r(L))1.5?1}+L]/[L{r(0)/r(L))1.5?1}+z]]1/1.5×r(L) and [[L/{(r(0)/r(L))6?1}+L]/[L/{(r(0)/r(L))6?1}+z]]1/6×r(L).Type: ApplicationFiled: June 2, 2010Publication date: August 30, 2012Applicant: KROSAKIHARIMA CORPORATIONInventor: Arito Mizobe
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Patent number: 8240524Abstract: The present invention is directed to creating a less-energy loss or smooth (constant) molten steel flow with a focus on a configuration of a bore of an upper nozzle, so as to provide an upper nozzle formed with a bore having a configuration capable of to suppress deposit formation. For this purpose, in an upper nozzle 10 for allowing molten steel to flow therethrough, a radius of an upper end of a bore 11 is set to be equal to or greater than 1.5 times a radius of a lower end of the bore 11, and a bore surface 14 is formed in a vertical cross-sectional configuration represented by log(r(z))=(1/n)×log((H+L)/(H+z))+log(r(L))(n=1.5 to 6).Type: GrantFiled: March 13, 2009Date of Patent: August 14, 2012Assignee: Krosakiharima CorporationInventors: Arito Mizobe, Mitsunobu Sato, Takahiro Yasuda
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Patent number: 8113391Abstract: An immersion nozzle for continuous casting including a tubular body, the tubular body having at the upper end an inlet from which molten steel is introduced into a passage extending from the inlet downward inside the tubular body, the tubular body having a bottom and being depressed in cross section at least at a lower section, the lower section having two narrow sidewalls and two broad sidewalls, the narrow sidewalls having a pair of opposing first outlets communicating with the passage, the bottom having a pair of second outlets communicating with the passage. The lower section has ridges projecting into the passage respectively from the inner surfaces of the broad sidewalls between the pair of first outlets. The second outlets are arranged symmetrically about the axis of the tubular body such that the axes of the second outlets cross each other within the passage.Type: GrantFiled: March 12, 2009Date of Patent: February 14, 2012Assignee: Krosaki Harima CorporationInventors: Hiroshi Otsuka, Arito Mizobe, Hisatake Okumura, Masahide Yoshida, Koji Kido, Joji Kurisu
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Patent number: 8037924Abstract: An immersion nozzle for continuous casting, including (1) a tubular body with a bottom, the tubular body having an inlet for entry of molten steel disposed at an upper end and a passage extending inside the tubular body downward from the inlet, and (2) a pair of opposing outlets disposed in a sidewall at a lower section of the tubular body so as to communicate with the passage, the nozzle comprising: a pair of opposing ridges horizontally projecting into the passage from an inner wall between the pair of outlets, the inner wall defining the passage.Type: GrantFiled: March 9, 2009Date of Patent: October 18, 2011Assignee: Krosaki Harima CorporationInventors: Koji Kido, Joji Kurisu, Hiroshi Otsuka, Arito Mizobe, Takahiro Kuroda
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Publication number: 20110240688Abstract: It is intended to uniform and straighten a molten steel stream flowing out of a discharge port of an immersion nozzle, and thus suppress mold powder entrapment in the vicinity of the immersion nozzle. The immersion nozzle comprises a tubular-shaped straight nozzle body formed to extend in a vertical longitudinal direction and adapted to allow molten steel from a molten-steel inlet provided at an upper end thereof to pass downwardly therethrough, and a pair of discharge ports provided in a lower portion of the straight nozzle body in bilaterally symmetrical relation and adapted to discharge the molten steel from a lateral surface of the straight nozzle body in a lateral direction.Type: ApplicationFiled: June 10, 2010Publication date: October 6, 2011Applicant: KROSAKIHARIMA CORPORATIONInventors: Arito MIZOBE, Kouichi TACHIKAWA
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Publication number: 20110017784Abstract: Provided is a molten metal discharge nozzle capable of suppressing turbulence in a molten metal stream passing through an inner bore thereof, with a simple structure. A cross-sectional shape of a wall surface of the inner bore, taken along an axis of the inner bore, comprises a part or an entirety of a curved line expressed by the following formula: log(r(z))=(1/n)×log((Hc+L)/(Hc+z))+log(r(L)) (1), where: 6?n?1.Type: ApplicationFiled: June 16, 2010Publication date: January 27, 2011Applicant: KROSAKIHARIMA CORPORATIONInventors: Arito MIZOBE, Hideaki Kawabe, Manabu Kimura
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Publication number: 20100219212Abstract: The present invention is directed to creating a less-energy loss or smooth (constant) molten steel flow with a focus on a configuration of a bore of an upper nozzle, so as to provide an upper nozzle formed with a bore having a configuration capable of to suppress deposit formation. For this purpose, in an upper nozzle 10 for allowing molten steel to flow therethrough, a radius of an upper end of a bore 11 is set to be equal to or greater than 1.5 times a radius of a lower end of the bore 11, and a bore surface 14 is formed in a vertical cross-sectional configuration represented by log(r (z))=(1/n)×log((H+L)/(H+z))+log(r (L))(n=1.5 to 6).Type: ApplicationFiled: March 13, 2009Publication date: September 2, 2010Applicant: KROSAKIHARIMA CORPORATIONInventors: Arito Mizobe, Mitsunobu Sato, Takahiro Yasuda
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Patent number: 7641081Abstract: Disclosed is an immersion nozzle, which comprises a vertically-extending pipe-shaped straight nozzle body 10 adapted to allow molten steel to pass downwardly from an inlet port 9 provided at an upper end thereof, and a pair of discharge portions each including a respective one of a pair of outlet ports 12 provided in a lower portion of the straight nozzle body 10 in a bilaterally symmetrical arrangement and adapted to discharge molten steel laterally from a lateral side of the straight nozzle body. Each of the discharge portions has an inner surface defining the outlet port 12 and extending parallel to an axis of the outlet port 12 to define a length of the discharge portion at 45 mm or more. A ratio of S1/S2 is in the range of 0.8 to 1.Type: GrantFiled: December 10, 2007Date of Patent: January 5, 2010Assignee: Krosakiharima CorporationInventors: Koji Kido, Joji Kurisu, Arito Mizobe, Hiroshi Otsuka, Masahide Yoshida
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Publication number: 20090242163Abstract: An immersion nozzle for continuous casting, including (1) a tubular body with a bottom, the tubular body having an inlet for entry of molten steel disposed at an upper end and a passage extending inside the tubular body downward from the inlet, and (2) a pair of opposing outlets disposed in a sidewall at a lower section of the tubular body so as to communicate with the passage, the nozzle comprising: a pair of opposing ridges horizontally projecting into the passage from an inner wall between the pair of outlets, the inner wall defining the passage.Type: ApplicationFiled: March 9, 2009Publication date: October 1, 2009Applicant: Krosaki Harima CorporationInventors: Koji Kido, Joji Kurisu, Hiroshi Otsuka, Arito Mizobe, Takahiro Kuroda
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Publication number: 20090242592Abstract: An immersion nozzle for continuous casting including a tubular body, the tubular body having at the upper end an inlet from which molten steel is introduced into a passage extending from the inlet downward inside the tubular body, the tubular body having a bottom and being depressed in cross section at least at a lower section, the lower section having two narrow sidewalls and two broad sidewalls, the narrow sidewalls having a pair of opposing first outlets communicating with the passage, the bottom having a pair of second outlets communicating with the passage. The lower section has ridges projecting into the passage respectively from the inner surfaces of the broad sidewalls between the pair of first outlets. The second outlets are arranged symmetrically about the axis of the tubular body such that the axes of the second outlets cross each other within the passage.Type: ApplicationFiled: March 12, 2009Publication date: October 1, 2009Applicant: Krosaki Harima CorporationInventors: Hiroshi Otsuka, Arito Mizobe, Hisatake Okumura, Masahide Yoshida, Koji Kido, Joji Kurisu