Patents by Inventor Ichiro Yamagiwa
Ichiro Yamagiwa 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: 11021871Abstract: A perforated sound-absorbing plate includes a perforated plate as a base material in which a large number of through holes are formed. A coating film is provided on an inner wall surface of the through hole, and a through-hole portion whose volume is smaller than a volume of the through hole is formed by the coating film.Type: GrantFiled: November 18, 2016Date of Patent: June 1, 2021Assignee: KOBE STEEL, LTD.Inventors: Zenzo Yamaguchi, Ichiro Yamagiwa
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Publication number: 20190112805Abstract: A perforated sound-absorbing plate includes a perforated plate as a base material in which a large number of through holes are formed. A coating film is provided on an inner wall surface of the through hole, and a through-hole portion whose volume is smaller than a volume of the through hole is formed by the coating film.Type: ApplicationFiled: November 18, 2016Publication date: April 18, 2019Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Zenzo YAMAGUCHI, Ichiro YAMAGIWA
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Patent number: 10229665Abstract: A porous sound absorbing structure according to the present invention includes an outer material 2 having a smooth curved shape, an inner material 3 having an uneven shape with a perimeter thereof combined with a perimeter of the outer material 2 to form a hollow portion S between the outer material 2 and the inner material, and a reinforcing plate material 4 having a large number of through holes 5, the reinforcing plate material being attached to a surface of the inner material 3 on the side of the hollow portion S in such a manner that an air layer is formed between the reinforcing plate material and the surface. A sound absorbing property is given to an interior of the hollow portion S by the reinforcing plate material 4.Type: GrantFiled: August 12, 2016Date of Patent: March 12, 2019Assignee: Kobe Steel, Ltd.Inventors: Ichiro Yamagiwa, Zenzo Yamaguchi, Akio Sugimoto, Yoshikazu Mukai, Hideki Ishitobi
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Patent number: 9744921Abstract: Provided is an engine hood comprising: an outer panel that constitutes an outer part of the engine hood; and an inner panel that constitutes an inner part of the engine hood and that is joined to the outer panel such that a space is formed between the inner panel and the outer panel. A porous section that comprises a plurality of through holes is provided to the inner panel. An external air intake hole that guides external air into the space is provided to the engine hood.Type: GrantFiled: February 5, 2015Date of Patent: August 29, 2017Assignee: Kobe Steel, Ltd.Inventors: Zenzo Yamaguchi, Ichiro Yamagiwa
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Patent number: 9564118Abstract: This sound insulating structure (1) is provided with: a panel (2); a sound insulating material (3) laminated to the panel (2); a reinforcing material (4) provided between the panel (2) and the sound insulating material (3) and bonded to the panel (2); and an air layer (S) formed between the panel (2) and the reinforcing material (4). The reinforcing material (4) has a plurality of through-holes (5).Type: GrantFiled: February 26, 2014Date of Patent: February 7, 2017Assignee: Kobe Steel, Ltd.Inventors: Ichiro Yamagiwa, Zenzo Yamaguchi, Akio Sugimoto, Yoshikazu Mukai
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Publication number: 20170001579Abstract: Provided is an engine hood comprising: an outer panel that constitutes an outer part of the engine hood; and an inner panel that constitutes an inner part of the engine hood and that is joined to the outer panel such that a space is formed between the inner panel and the outer panel. A porous section that comprises a plurality of through holes is provided to the inner panel. An external air intake hole that guides external air into the space is provided to the engine hood.Type: ApplicationFiled: February 5, 2015Publication date: January 5, 2017Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Zenzo YAMAGUCHI, Ichiro YAMAGIWA
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Publication number: 20160351180Abstract: A porous sound absorbing structure according to the present invention includes an outer material 2 having a smooth curved shape, an inner material 3 having an uneven shape with a perimeter thereof combined with a perimeter of the outer material 2 to form a hollow portion S between the outer material 2 and the inner material, and a reinforcing plate material 4 having a large number of through holes 5, the reinforcing plate material being attached to a surface of the inner material 3 on the side of the hollow portion S in such a manner that an air layer is formed between the reinforcing plate material and the surface. A sound absorbing property is given to an interior of the hollow portion S by the reinforcing plate material 4.Type: ApplicationFiled: August 12, 2016Publication date: December 1, 2016Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Ichiro YAMAGIWA, Zenzo YAMAGUCHI, Akio SUGIMOTO, Yoshikazu MUKAI, Hideki ISHITOBI
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Patent number: 9453336Abstract: A porous sound absorbing structure according to the present invention includes an outer material 2 having a smooth curved shape, an inner material 3 having an uneven shape with a perimeter thereof combined with a perimeter of the outer material 2 to form a hollow portion S between the outer material 2 and the inner material, and a reinforcing plate material 4 having a large number of through holes 5, the reinforcing plate material being attached to a surface of the inner material 3 on the side of the hollow portion S in such a manner that an air layer is formed between the reinforcing plate material and the surface. A sound absorbing property is given to an interior of the hollow portion S by the reinforcing plate material 4.Type: GrantFiled: August 28, 2013Date of Patent: September 27, 2016Assignee: Kobe Steel, Ltd.Inventors: Ichiro Yamagiwa, Zenzo Yamaguchi, Akio Sugimoto, Yoshikazu Mukai, Hideki Ishitobi
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Publication number: 20160012811Abstract: This sound insulating structure (1) is provided with: a panel (2); a sound insulating material (3) laminated to the panel (2); a reinforcing material (4) provided between the panel (2) and the sound insulating material (3) and bonded to the panel (2); and an air layer (S) formed between the panel (2) and the reinforcing material (4). The reinforcing material (4) has a plurality of through-holes (5).Type: ApplicationFiled: February 26, 2014Publication date: January 14, 2016Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Ichiro YAMAGIWA, Zenzo YAMAGUCHI, Akio SUGIMOTO, Yoshikazu MUKAI
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Patent number: 8887864Abstract: Sound absorbency is imparted on a panel, which has increased strength and rigidity, by laminating a foam resin that is not originally permeable and does not absorb sound, and surface sheets that are not originally permeable and do not absorb sound. A sound absorption panel 1, obtained by laminating a foam resin 20 comprising closed cells and aluminum alloy sheets 10 (metal sheets), has a plurality of holes 30 formed therein, which penetrate the foam resin 20 and the aluminum alloy sheets 10 in the thickness direction. The holes 30 are formed by forcing a needle 40 (hole-forming means) through the foam resin 20 and the aluminum alloy sheets 10.Type: GrantFiled: February 15, 2012Date of Patent: November 18, 2014Assignee: Kobe Steel, Ltd.Inventors: Akio Sugimoto, Zenzo Yamaguchi, Ichiro Yamagiwa
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Publication number: 20130264147Abstract: Sound absorbency is imparted on a panel, which has increased strength and rigidity, by laminating a foam resin that is not originally permeable and does not absorb sound, and surface sheets that are not originally permeable and do not absorb sound. A sound absorption panel 1, obtained by laminating a foam resin 20 comprising closed cells and aluminum alloy sheets 10 (metal sheets), has a plurality of holes 30 formed therein, which penetrate the foam resin 20 and the aluminum alloy sheets 10 in the thickness direction. The holes 30 are formed by forcing a needle 40 (hole-forming means) through the foam resin 20 and the aluminum alloy sheets 10.Type: ApplicationFiled: February 15, 2012Publication date: October 10, 2013Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Akio Sugimoto, Zenzo Yamaguchi, Ichiro Yamagiwa
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Patent number: 8042648Abstract: A material for processing includes an elastically deformable single thin plate comprising a plurality of through-holes. The plate has a first wave-like shape, which is formed in a first direction and, in which troughs and ridges are alternately connected in repetition, and a second wave-like shape which is formed in a second direction crossing the first direction and in which troughs and ridges are alternately connected in repetition. The first wave-like shape has a corrugated shape in which the ridges each include a pair of side parts rising from the corresponding troughs and an apex part connected between the pair of side parts. An apex length of the apex part along the first direction is defined as being longer than an opening length, along the first direction, between base parts of the pair of side parts.Type: GrantFiled: October 21, 2010Date of Patent: October 25, 2011Assignees: Sanwa Packing Industry Co., Ltd., Kabushiki Kaisha Kobe Seiko ShoInventors: Kazuyo Akimoto, Yoshinori Doumoto, Ichiro Yamagiwa, Kyoko Masuda, Mitsuo Hino
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Publication number: 20110094824Abstract: A material for processing includes an elastically deformable single thin plate comprising a plurality of through-holes. The plate has a first wave-like shape, which is formed in a first direction and, in which troughs and ridges are alternately connected in repetition, and a second wave-like shape which is formed in a second direction crossing the first direction and in which troughs and ridges are alternately connected in repetition. The first wave-like shape has a corrugated shape in which the ridges each include a pair of side parts rising from the corresponding troughs and an apex part connected between the pair of side parts. An apex length of the apex part along the first direction is defined as being longer than an opening length, along the first direction, between base parts of the pair of side parts.Type: ApplicationFiled: October 21, 2010Publication date: April 28, 2011Applicants: SANWA PACKING INDUSTRY CO., LTD., KABUSHIKI KAISHA KOBE SEIKO SHOInventors: Kazuyo Akimoto, Yoshinori Doumoto, Ichiro Yamagiwa, Kyoko Masuda, Mitsuo Hino
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Publication number: 20100287919Abstract: According to the present invention, a heat insulator mounting structure able to reduce noise propagated around a vehicle is provided. The heat insulator mounting structure includes an exhaust pipe disposed so that an upper half surface thereof is positioned higher than a horizontal lower surface of a vehicle body, a first shield portion for covering an upper surface of the exhaust pipe above the horizontal lower surface of the vehicle body, and a pair of second shield portions extending downwards below the horizontal lower surface of the vehicle body from both ends of the first shield portion in the circumferential direction of the exhaust pipe.Type: ApplicationFiled: May 10, 2010Publication date: November 18, 2010Inventors: Ichiro Yamagiwa, Yoshio Yano, Akio Sugimoto
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Publication number: 20100175949Abstract: A porous sound absorbing structure 10 includes an exterior plate 1 and a closing plate 2 in order to suppress a decrease in sound absorbing performance in a wide frequency band. An interior plate 3 is arranged between the exterior plate 1 and the closing plate 2, and air layers 4 and 5 are located between the exterior plate 1 and the interior plate 3 and between the interior plate 3 and the closing plate 2 respectively. The exterior plate 1, the interior plate 3, and the closing plate 2 are arranged while opposed to each other. Many through holes 1a and 3a are made in the exterior plate 1 and the closing plate 2 respectively. In the interior plate 3, a plate thickness t2 and a diameter ?2 and an aperture ratio ?2 are set so as to generate an viscous effect in air passing through the through hole 3a. The aperture ratio ?1 of the through hole 1a in the exterior plate 1 is set more than 3% and not more than 50%.Type: ApplicationFiled: March 16, 2010Publication date: July 15, 2010Inventors: Zenzo Yamaguchi, Toshimitsu Tanaka, Ichiro Yamagiwa, Hiroki Ueda, Mitsuo Hino
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Patent number: 7654364Abstract: A sound absorbing structure having excellent in sound absorbing performance, which is capable of achieving 0.4 or higher in the sound absorbing coefficient even in the case where a perforated panel is a thin plate such as aluminum foil within a range where a reduction in the weight of a vehicle body is not impaired and through holes have a large hole diameter in order to make the processing of providing a large number of through holes in the perforated panel.Type: GrantFiled: December 15, 2005Date of Patent: February 2, 2010Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Zenzo Yamaguchi, Ichiro Yamagiwa, Toshimitsu Tanaka, Hiroki Ueda, Kensuke Tsubota
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Publication number: 20080257642Abstract: A perforated soundproof structure is formed by oppositely arranging an external plate 1 and an internal plate 2 having a number of through-holes 2a. The board thickness, hole diameter and open area ratio of the internal plate 2 are set to satisfy design conditions to give rise to a viscous effect in the air passing through the through-holes 2a, and the design conditions are set so that the frequency bandwidth to attain an absorption coefficient of 0.3 or more is 10% or more of the resonance frequency.Type: ApplicationFiled: October 16, 2007Publication date: October 23, 2008Inventors: Ichiro Yamagiwa, Toshimitsu Tanaka, Hiroki Ueda, Hideo Utsuno, Toru Sakatani, Akio Sugimoto
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Patent number: 7434660Abstract: A perforated soundproof structure is formed by oppositely arranging an external plate 1 and an internal plate 2 having a number of through-holes 2a. The board thickness, hole diameter and open area ratio of the internal plate 2 are set to satisfy design conditions to give rise to a viscous effect in the air passing through the through-holes 2a, and the design conditions are set so that the frequency bandwidth to attain an absorption coefficient of 0.3 or more is 10% or more of the resonance frequency.Type: GrantFiled: June 17, 2002Date of Patent: October 14, 2008Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Ichiro Yamagiwa, Toshimitsu Tanaka, Hiroki Ueda, Hideo Utsuno, Toru Sakatani, Akio Sugimoto
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Publication number: 20080128201Abstract: A sound absorbing structure having excellent in sound absorbing performance, which is capable of achieving 0.4 or higher in the sound absorbing coefficient even in the case where a perforated panel is a thin plate such as aluminum foil within a range where a reduction in the weight of a vehicle body is not impaired and through holes have a large hole diameter in order to make the processing of providing a large number of through holes in the perforated panel.Type: ApplicationFiled: December 15, 2005Publication date: June 5, 2008Inventors: Zenzo Yamaguchi, Ichiro Yamagiwa, Toshimitsu Tanaka, Hiroki Ueda, Kensuke Tsubota
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Publication number: 20070272482Abstract: A porous sound absorbing structure 10 includes an exterior plate 1 and a closing plate 2 in order to suppress a decrease in sound absorbing performance in a wide frequency band. An interior plate 3 is arranged between the exterior plate 1 and the closing plate 2, and air layers 4 and 5 are located between the exterior plate 1 and the interior plate 3 and between the interior plate 3 and the closing plate 2 respectively. The exterior plate 1, the interior plate 3, and the closing plate 2 are arranged while opposed to each other. Many through holes 1a and 3a are made in the exterior plate 1 and the closing plate 2 respectively. In the interior plate 3, a plate thickness t2 and a diameter ?2 and an aperture ratio ?2 are set so as to generate an viscous effect in air passing through the through hole 3a. The aperture ratio ?1 of the through hole 1a in the exterior plate 1 is set more than 3% and not more than 50%.Type: ApplicationFiled: April 15, 2005Publication date: November 29, 2007Applicant: KABUSHIKI KAISHA KOBE SEIKO SHOInventors: Zenzo Yamaguchi, Toshimitsu Tanaka, Ichiro Yamagiwa, Hiroki Ueda, Mitsuo Hino