Patents by Inventor Shoji Kasai
Shoji Kasai 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: 11673174Abstract: A bridle device and a method for producing a steel strip in which snaking of a steel strip that occurs during production of a high-silicon steel strip is suppressed. The bridle device includes a pair of upper and lower rotatable endless belts or a pair of upper and lower rotatable caterpillars configured to pinch a steel strip. The bridle device is movable or swingable in a steel strip width direction by using a steering mechanism. The bridle device further includes a rolling reduction mechanism configured to perform rolling reduction on a pinched portion of the steel strip by using the pair of upper and lower endless belts or the pair of upper and lower caterpillars. The steering mechanism moves or swings the bridle device in the steel strip width direction, and the rolling reduction mechanism performs rolling reduction on one of end portions in the steel strip width direction.Type: GrantFiled: October 16, 2019Date of Patent: June 13, 2023Assignee: JFE STEEL CORPORATIONInventors: Takashi Doi, Shoji Kasai, Teruhiko Tobe
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Patent number: 11401575Abstract: A sealing device is installed in heating treatment equipment through which a steel strip passes, the device including a rotary damper which is placed above the steel strip so as to be in contact with the steel strip, and a roll which is placed below the steel strip so that the roll opposes the rotary damper to form a pair consisting of the rotary damper and the roll opposing each other, the steel strip passing through a gap, which is formed between the rotary damper and the roll opposing each other, in which two pairs each of which is the pair consisting of the rotary damper and the roll opposing each other are arranged in tandem in a moving direction of the steel strip in the heating treatment equipment, and an inert gas is fed into a space defined by the two pairs arranged in tandem.Type: GrantFiled: March 29, 2018Date of Patent: August 2, 2022Assignee: JFE Steel CorporationInventors: Takashi Doi, Shoji Kasai, Teruhiko Tobe, Takumi Koyama
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Publication number: 20220001429Abstract: A bridle device and a method for producing a steel strip in which snaking of a steel strip that occurs during production of a high-silicon steel strip is suppressed. The bridle device includes a pair of upper and lower rotatable endless belts or a pair of upper and lower rotatable caterpillars configured to pinch a steel strip. The bridle device is movable or swingable in a steel strip width direction by using a steering mechanism. The bridle device further includes a rolling reduction mechanism configured to perform rolling reduction on a pinched portion of the steel strip by using the pair of upper and lower endless belts or the pair of upper and lower caterpillars. The steering mechanism moves or swings the bridle device in the steel strip width direction, and the rolling reduction mechanism performs rolling reduction on one of end portions in the steel strip width direction.Type: ApplicationFiled: October 16, 2019Publication date: January 6, 2022Applicant: JFE STEEL CORPORATIONInventors: Takashi DOI, Shoji KASAI, Teruhiko TOBE
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Patent number: 10883163Abstract: A high-silicon steel strip is manufactured. A basic configuration includes partition plates arranged in the longitudinal direction of a furnace to extend from a position in the vicinity of respective gas nozzles to be in parallel to the pass line of the steel strip, and obstacles arranged to face partition-plate rear edges in the longitudinal direction of the furnace to obstruct the flow of the gas along the steel strip so that siliconizing spaces surrounded by the steel strip, the partition plates, and the obstacles are formed; and gaps between the partition-plate rear edges and the obstacles and so forth which form exhaust passages through which gas is discharged from the siliconizing spaces to other spaces inside the furnace so that treatment gas which has been sprayed from the gas nozzles onto a surface of the steel strip to flow through the siliconizing spaces is discharged through the exhaust passages.Type: GrantFiled: September 1, 2016Date of Patent: January 5, 2021Assignee: JFE STEEL CORPORATIONInventors: Shoji Kasai, Takashi Doi, Masatoshi Nishide
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Publication number: 20200040425Abstract: A sealing device is installed in heating treatment equipment through which a steel strip passes, the device including a rotary damper which is placed above the steel strip so as to be in contact with the steel strip, and a roll which is placed below the steel strip so that the roll opposes the rotary damper to form a pair consisting of the rotary damper and the roll opposing each other, the steel strip passing through a gap, which is formed between the rotary damper and the roll opposing each other, in which two pairs each of which is the pair consisting of the rotary damper and the roll opposing each other are arranged in tandem in a moving direction of the steel strip in the heating treatment equipment, and an inert gas is fed into a space defined by the two pairs arranged in tandem.Type: ApplicationFiled: March 29, 2018Publication date: February 6, 2020Inventors: Takashi Doi, Shoji Kasai, Teruhiko Tobe, Takumi Koyama
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Publication number: 20180245196Abstract: A high-silicon steel strip is manufactured. A basic configuration includes partition plates arranged in the longitudinal direction of a furnace to extend from a position in the vicinity of respective gas nozzles to be in parallel to the pass line of the steel strip, and obstacles arranged to face partition-plate rear edges in the longitudinal direction of the furnace to obstruct the flow of the gas along the steel strip so that siliconizing spaces surrounded by the steel strip, the partition plates, and the obstacles are formed; and gaps between the partition-plate rear edges and the obstacles and so forth which form exhaust passages through which gas is discharged from the siliconizing spaces to other spaces inside the furnace so that treatment gas which has been sprayed from the gas nozzles onto a surface of the steel strip to flow through the siliconizing spaces is discharged through the exhaust passages.Type: ApplicationFiled: September 1, 2016Publication date: August 30, 2018Applicant: JFE STEEL CORPORATIONInventors: Shoji Kasai, Takashi Doi, Masatoshi Nishide
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Publication number: 20170314108Abstract: A method of manufacturing a high strength steel sheet includes subjecting a steel having a chemical composition including C: 0.08% to 0.20%, Si: 0.3% or less, Mn: 0.1% to 3.0%, P: 0.10% or less, S: 0.030% or less, Al: 0.10% or less, N: 0.010% or less, V: 0.20% to 0.80%, and the remainder composed of Fe and incidental impurities on a percent by mass basis to a hot rolling process composed of heating, rough rolling, finish rolling, cooling, and coiling into the shape of a coil at a predetermined coiling temperature, wherein the heating is performed at a temperature of 1,100° C. or higher for 10 min or more, the rough rolling is performed at a finish rough rolling temperature of 1,000° C. or higher, the finish rolling is performed at a finishing temperature of 850° C. or higher, in which a reduction ratio in a temperature range of 1,000° C. or lower is 96% or less, a reduction ratio in a temperature range of 950° C.Type: ApplicationFiled: July 14, 2017Publication date: November 2, 2017Inventors: Taro Kizu, Yoshimasa Funakawa, Hidekazu Ookubo, Tokunori Kanemura, Masato Shigemi, Shoji Kasai, Shinji Yamazaki, Yusuke Yasufuku
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Patent number: 9738960Abstract: The high strength steel sheet has a chemical composition including 0.08% to 0.20% of C, 0.3% or less of Si, 0.1% to 3.0% of Mn, 0.10% or less of P, 0.030% or less of S, 0.10% or less of Al, 0.010% or less of N, 0.20% to 0.80% of V, and the remainder composed of Fe and incidental impurities on a percent by mass basis, and a microstructure which includes 95% or more of ferrite phase on an area percentage basis, in which fine precipitates are dispersed having a distribution in such a way that the number density of precipitates having a particle size of less than 10 nm is 1.0×105/?m3 or more and the standard deviation of natural logarithm values of precipitate particle sizes with respect to precipitates having a particle size of less than 10 nm is 1.5 or less.Type: GrantFiled: April 18, 2013Date of Patent: August 22, 2017Assignee: JFE Steel CorporationInventors: Taro Kizu, Yoshimasa Funakawa, Hidekazu Ookubo, Tokunori Kanemura, Masato Shigemi, Shoji Kasai, Shinji Yamazaki, Yusuke Yasufuku
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Publication number: 20150056468Abstract: The high strength steel sheet has a chemical composition including 0.08% to 0.20% of C, 0.3% or less of Si, 0.1% to 3.0% of Mn, 0.10% or less of P, 0.030% or less of S, 0.10% or less of Al, 0.010% or less of N, 0.20% to 0.80% of V, and the remainder composed of Fe and incidental impurities on a percent by mass basis, and a microstructure which includes 95% or more of ferrite phase on an area percentage basis, in which fine precipitates are dispersed having a distribution in such a way that the number density of precipitates having a particle size of less than 10 nm is 1.0×105/?m3 or more and the standard deviation of natural logarithm values of precipitate particle sizes with respect to precipitates having a particle size of less than 10 nm is 1.5 or less.Type: ApplicationFiled: April 18, 2013Publication date: February 26, 2015Inventors: Taro Kizu, Yoshimasa Funakawa, Hidekazu Ookubo, Tokunori Kanemura, Masato Shigemi, Shoji Kasai, Shinji Yamazaki, Yusuke Yasufuku
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Patent number: 6527876Abstract: A silicon steel sheet having low iron loss of high frequency has a surface layer of the steel sheet which has Si concentration higher than Si concentration of a center portion of the steel sheet. Si concentration of sheet thickness center is 3.4 wt. % or more and Si concentration of the surface layer of the steel sheet is 5 wt. % or more. Si concentration in a surface layer portion is 5 to 8 wt. %. The production method comprises siliconizing treatment and diffusing treatment. Velocity of siliconizing and diffusing are controlled, and Si concentration distribution in the sheet thickness direction of the steel sheet is controlled.Type: GrantFiled: January 24, 2000Date of Patent: March 4, 2003Assignee: NKK CorporationInventors: Misao Namikawa, Yoshikazu Takada, Shoji Kasai, Hironori Ninomiya, Tsunehiro Yamaji, Tatsuhiko Hiratani
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Publication number: 20020134466Abstract: A silicon steel sheet having low iron loss of high frequency has a surface layer of the steel sheet which has Si concentration higher than Si concentration of a center portion of the steel sheet. Si concentration of sheet thickness center is 3.4 wt. % or more and Si concentration of the surface layer of the steel sheet is 5 wt. % or more. Si concentration in a surface layer portion is 5 to 8 wt. %. The production method comprises siliconizing treatment and diffusing treatment. Velocity of siliconizing and diffusing are controlled, and Si concentration distribution in the sheet thickness direction of the steel sheet is controlled.Type: ApplicationFiled: January 24, 2000Publication date: September 26, 2002Inventors: MISAO NAMIKAWA, YOSHIKAZU TAKADA, SHOJI KASAI, HIRONORI NINOMIYA, TSUNEHIRO YAMAJI, TATSUHIKO HIRATANI
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Patent number: 6241829Abstract: A silicon steel sheet contains 0.01 wt. % or less C, 4 to 10 wt. % Si, 0.5 wt. % or less Mn, 0.01 wt. % or less P, 0.01 wt. % or less S, 0.2 wt. % or less sol. Al, 0.01 wt. % or less N, 0.02 wt. % or less O and the balance being Fe. The silicon steel sheet has grain boundaries and carbides which are precipitated on the grain boundaries. The carbides have an area of 20% or less to an area of the grain boundaries. The steel sheet is cooled at a cooling speed of 5° C./sec. or more in a temperature range of from 300 to 700° C.Type: GrantFiled: December 9, 1999Date of Patent: June 5, 2001Assignee: NKK CorporationInventors: Koichiro Fujita, Yasushi Tanaka, Hironori Ninomiya, Tatsuhiko Hiratani, Shoji Kasai
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Patent number: 6045627Abstract: A silicon steel sheet contains 0.01 wt. % or less C, 4 to 10 wt. % Si, 0.5 wt. % or less Mn, 0.01 wt. % or less P, 0.01 wt. % or less S, 0.2 wt. % or less sol. Al, 0.01 wt. % or less N, 0.02 wt. % or less O and the balance being Fe. The silicon steel sheet has grain boundaries and carbides which are precipitated on the grain boundaries. The carbides have an area of 20% or less to an area of the grain boundaries. The steel sheet is cooled at a cooling speed of 5.degree. C./sec. or more in a temperature range of from 300 to 700.degree. C.Type: GrantFiled: June 4, 1998Date of Patent: April 4, 2000Assignee: NKK CorporationInventors: Koichiro Fujita, Yasushi Tanaka, Hironori Ninomiya, Tatsuhiko Hiratani, Shoji Kasai
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Patent number: 5993568Abstract: A soft magnetic alloy sheet has low residual magnetic flux density. The alloy sheet comprises a base element and an alloying element having a concentration gradient in a thickness direction of the alloy sheet. The alloying element is selected from Si, Al, Ni, Co and Fe.Type: GrantFiled: March 25, 1998Date of Patent: November 30, 1999Assignee: NKK CorporationInventors: Yoshikazu Takada, Hironori Ninomiya, Misao Namikawa, Koichiro Fujita, Shoji Kasai, Tatsuhiko Hiratani
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Patent number: 5902419Abstract: A silicon steel sheet contains 0.01 wt. % or less C, 4 to 10 wt. % Si, 0.5 wt. % or less Mn, 0.01 wt. % or less P, 0.01 wt. % or less S, 0.2 wt. % or less sol. Al, 0.01 wt. % or less N, 0.02 wt. % or less 0 and the balance being Fe. The silicon steel sheet has grain boundaries and carbides which are precipitated on the grain boundaries. The carbides have an area of 20% or less to an area of the grain boundaries. The steel sheet is cooled at a cooling speed of 5.degree. C./sec. or more in a temperature range of from 300 to 700.degree. C.Type: GrantFiled: September 23, 1996Date of Patent: May 11, 1999Assignee: NKK CorporationInventors: Koichiro Fujita, Yasushi Tanaka, Hironori Ninomiya, Tatsuhiko Hiratani, Shoji Kasai
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Patent number: 4564213Abstract: A vehicle suspension mechanism including a carrier for carrying a rear wheel rotatably about an axis of rotation, a strut assembly having an upper end connected with a vehicle body and a lower end connected with the carrier, a swingable arm pivotably connected through resilient rubber bushes with the vehicle body at a longitudinally spaced first forward point and a first rearward point and with the carrier at a longitudinally spaced second forward point and a second rearward point. The aforementioned points are arranged so that the distance between the line connecting the first forward and first rearward points and the line connecting the second forward and second rearward points increases toward the rearward direction, whereby a toe-in movement is produced when the arm is upwardly swung.Type: GrantFiled: February 22, 1985Date of Patent: January 14, 1986Assignee: Mazda Motor CorporationInventors: Jiro Maebayashi, Shoji Kasai
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Patent number: 4478430Abstract: A vehicle suspension mechanism including a carrier for carrying a rear wheel rotatably about an axis of rotation, a strut assembly having an upper end connected with a vehicle body and a lower end connected with the carrier, a swingable arm pivotably connected through resilient rubber bushes with the vehicle body at a longitudinally spaced first forward point and a first rearward point and with the carrier at a longitudinally spaced second forward point and a second rearward point, the first rearward point being at a higher level than a plane defined by the remaining three points so that a toe-in movement is produced when the arm is upwardly swung.Type: GrantFiled: October 26, 1982Date of Patent: October 23, 1984Assignee: Toyo Kogyo Co., Ltd.Inventors: Jiro Maebayashi, Shoji Kasai
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Patent number: D594199Type: GrantFiled: December 19, 2007Date of Patent: June 16, 2009Assignee: Toho Lamac Co., Ltd.Inventor: Shoji Kasai