Patents by Inventor Takuji Yamashita
Takuji Yamashita 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: 11692344Abstract: A fireproof covered structure for covering a penetration part formed in a fireproof beam of a wooden building to make the penetration part fireproof, wherein a tubular fireproof covering material is attached to the penetration part while covering an inner peripheral surface of the penetration part. The tubular fireproof covering material is formed by stacking a plurality of gypsum board pieces cut out from commercially available gypsum boards of thicknesses of 9.5 mm to 25.5 mm, in the thickness direction and unitarily connecting the gypsum board pieces. The tubular fireproof covering material is inserted into and attached to the penetration part such that a connecting portion That connects gypsum board pieces That are adjacent in the stacking direction is disposed at a boundary portion between a structural member and a covering member of the fireproof beam, or at a portion close to the boundary portion.Type: GrantFiled: December 20, 2018Date of Patent: July 4, 2023Assignee: Yoshino Gypsum Co., Ltd.Inventors: Yukiko Chatani, Mariko Seki, Takahiro Hebiishi, Eiichi Kuroda, Wataru Ohuchi, Takuji Yamashita, Kouji Yamakata
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Patent number: 11624185Abstract: A penetration part fireproof covering material used when a penetration part covered for fireproof is formed in a fireproof beam that is a fireproof constructional member that constitutes a wooden building, wherein the penetration part fireproof covering material is formed to have a tubular shape by stacking a plurality of gypsum board pieces (13a) formed from gypsum boards in a thickness direction and unitarily connecting the plurality of gypsum board pieces. The penetration part fireproof covering material is formed to have the tubular shape by stacking the plurality of gypsum board pieces that preferably have an annular shape and are cut out from commercially available gypsum boards having thicknesses of 9.5 mm to 25.5 mm while fixing the plurality of gypsum board pieces to each other preferably using metal fasteners such as staples, and unitarily connecting the plurality of gypsum board pieces.Type: GrantFiled: December 20, 2018Date of Patent: April 11, 2023Assignee: YOSHINO GYPSUM CO., LTD.Inventors: Yukiko Chatani, Mariko Seki, Takahiro Hebiishi, Eiichi Kuroda, Wataru Ohuchi, Takuji Yamashita, Kouji Yamakata
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Publication number: 20230012161Abstract: A clip that fixes a ceiling joist intersecting a ceiling joist receiver to the ceiling joist receiver, includes: a top portion having a width of the ceiling joist receiver; a first hanging portion hanging down from one end of the top portion, and provided with, at a lower portion, first engaging projections extending left and right to engage the ceiling joist; and a second hanging portion hanging down from another end of the top portion, and provided with, at a lower portion, second engaging projections extending left and right to lock the ceiling joist. The first hanging portion has a length longer than that of the second hanging portion, and a recess extending in a direction toward the second hanging portion is provided at an intermediate position of the first hanging portion.Type: ApplicationFiled: November 18, 2020Publication date: January 12, 2023Inventors: Ushio SUDO, Tomoya HASEGAWA, Takuji YAMASHITA, Yusuke WATANABE
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Publication number: 20210071415Abstract: A fireproof covered structure for covering a penetration part formed in a fireproof beam of a wooden building to make the penetration part fireproof, wherein a tubular fireproof covering material is attached to the penetration part while covering an inner peripheral surface of the penetration part. The tubular fireproof covering material is formed by stacking a plurality of gypsum board pieces cut out from commercially available gypsum boards of thicknesses of 9.5 mm to 25.5 mm, in the thickness direction and unitarily connecting the gypsum board pieces. The tubular fireproof covering material is inserted into and attached to the penetration part such that a connecting portion That connects gypsum board pieces That are adjacent in the stacking direction is disposed at a boundary portion between a structural member and a covering member of the fireproof beam, or at a portion close to the boundary portion.Type: ApplicationFiled: December 20, 2018Publication date: March 11, 2021Applicant: YOSHINO GYPSUM CO., LTD.Inventors: Yukiko CHATANI, Mariko SEKI, Takahiro HEBIISHI, Eiichi KURODA, Wataru OHUCHI, Takuji YAMASHITA, Kouji YAMAKATA
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Publication number: 20200299956Abstract: A penetration part fireproof covering material used when a penetration part covered for fireproof is formed in a fireproof beam that is a fireproof constructional member that constitutes a wooden building, wherein the penetration part fireproof covering material is formed to have a tubular shape by stacking a plurality of gypsum board pieces (13a) formed from gypsum boards in a thickness direction and unitarily connecting the plurality of gypsum board pieces. The penetration part fireproof covering material is formed to have the tubular shape by stacking the plurality of gypsum board pieces that preferably have an annular shape and are cut out from commercially available gypsum boards having thicknesses of 9.5 mm to 25.5 mm while fixing the plurality of gypsum board pieces to each other preferably using metal fasteners such as staples, and unitarily connecting the plurality of gypsum board pieces.Type: ApplicationFiled: December 20, 2018Publication date: September 24, 2020Applicant: YOSHINO GYPSUM CO., LTD.Inventors: Yukiko CHATANI, Mariko SEKI, Takahiro HEBIISHI, Eiichi KURODA, Wataru OHUCHI, Takuji YAMASHITA, Kouji YAMAKATA
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Patent number: 8734582Abstract: Disclosed is a dry gypsum composition containing hemihydrate gypsum, at least one pigment and a crystal habit modifier. The crystal habit modifier is at least one compound selected from the group consisting of sulfate salts, carboxylate salts, carbonate salts and inorganic chlorides, and a content of the at least one compound is in a range of 0.1 to 5 parts by mass per 100 parts by mass of the hemihydrate gypsum, whereby upon hydration of the hemihydrate gypsum into dihydrate gypsum, the dihydrate gypsum is controlled to become plate crystals having an aspect ratio of 1 to 9. A gypsum-based coating formulation making use of the dry gypsum composition is also disclosed.Type: GrantFiled: November 28, 2011Date of Patent: May 27, 2014Assignee: Yoshino Gypsum Co., Ltd.Inventors: Takuji Yamashita, Masato Yamaguchi, Yoshikazu Tanaka
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Publication number: 20130199418Abstract: Disclosed is a dry gypsum composition containing hemihydrate gypsum, at least one pigment and a crystal habit modifier. The crystal habit modifier is at least one compound selected from the group consisting of sulfate salts, carboxylate salts, carbonate salts and inorganic chlorides, and a content of the at least one compound is in a range of 0.1 to 5 parts by mass per 100 parts by mass of the hemihydrate gypsum, whereby upon hydration of the hemihydrate gypsum into dihydrate gypsum, the dihydrate gypsum is controlled to become plate crystals having an aspect ratio of 1 to 9. A gypsum-based coating formulation making use of the dry gypsum composition is also disclosed.Type: ApplicationFiled: November 28, 2011Publication date: August 8, 2013Applicant: YOSHINO GYPSUM CO., LTD.Inventors: Takuji Yamashita, Masato Yamaguchi, Yoshikazu Tanaka
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Patent number: 6329891Abstract: A high frequency relay capable of effectively shielding a signal path, yet reducing a number of the parts forming the shield and the associated structure. The relay has a dielectric base mounting three fixed contacts arranged in a line and defined at upper ends of three contact terminals extending through the base. Two movable contact springs are utilized, each bridging the two adjacent fixed contacts for closing and opening a high frequency signal path between the two adjacent fixed contacts. Upstanding from the base is a pair of electromagnetic shield plates which define a shielded space therebetween for accommodating the three fixed contacts and the two movable contact springs. Each of the shield plates is configured to come into electrical contact with corresponding one of the movable contact springs moved in the contact opening position.Type: GrantFiled: November 22, 2000Date of Patent: December 11, 2001Assignee: Matsushita Electric Works, Ltd.Inventors: Tokatoshi Hayashi, Atsushi Nakahata, Takuji Yamashita, Hidetoshi Takeyama, Koji Sagawa, Tetsuya Yamada, Tomohiro Taguchi, Hisao Yabu
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Patent number: D945646Type: GrantFiled: June 22, 2020Date of Patent: March 8, 2022Assignee: YOSHINO GYPSUM CO., LTD.Inventors: Ushio Sudo, Tomoya Hasegawa, Takuji Yamashita, Yusuke Watanabe
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Patent number: D945647Type: GrantFiled: June 22, 2020Date of Patent: March 8, 2022Assignee: YOSHINO GYPSUM CO., LTD.Inventors: Ushio Sudo, Tomoya Hasegawa, Takuji Yamashita, Yusuke Watanabe
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Patent number: D953582Type: GrantFiled: June 19, 2020Date of Patent: May 31, 2022Assignee: YOSHINO GYPSUM CO., LTD.Inventors: Ushio Sudo, Tomoya Hasegawa, Takuji Yamashita, Yusuke Watanabe
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Patent number: D955859Type: GrantFiled: June 18, 2020Date of Patent: June 28, 2022Assignee: YOSHINO GYPSUM CO., LTD.Inventors: Ushio Sudo, Tomoya Hasegawa, Takuji Yamashita, Yusuke Watanabe