Patents by Inventor Yuzuru Takahashi
Yuzuru Takahashi 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).
-
Patent number: 11680871Abstract: A rolling bearing test includes: a hermetic container configured to allow atmosphere gas to be introduced therein; a rotary shaft housed in the hermetic container and fitted into the rolling bearing; a pair of shaft support portions fixed to a fixing portion provided in the hermetic container and configured to rotatably support the rotary shaft at both sides of the rolling bearing in an axial direction, respectively; a drive device configured to drive the rotary shaft; a holding portion configured to hold the outer ring of the rolling bearing to avoid rotation of the outer ring; a first load application mechanism configured to apply an axial load between the inner ring and the outer ring of the rolling bearing; and a second load application mechanism.Type: GrantFiled: June 8, 2020Date of Patent: June 20, 2023Assignees: JTEKT CORPORATION, KANDA CO. LTDInventors: Satoshi Fujimaru, Yousuke Nagano, Yuzuru Takahashi, Nobuhiro Kanda, Syuichi Miyabe
-
Publication number: 20220315804Abstract: A hot melt adhesive composition contains a 1-butene homopolymer, an ethylene-based polymer having a melting point of lower than 80° C., an ?-olefin copolymer having a melting point 80° C. or higher, a tackifying resin, wax, and a liquid softener, in which the ethylene-based polymer includes at least one type of copolymer selected from the group consisting of an ethylene-?-olefin copolymer and an ethylene-vinyl acetate copolymer.Type: ApplicationFiled: December 19, 2019Publication date: October 6, 2022Inventor: Yuzuru Takahashi
-
Patent number: 11390780Abstract: The present invention relates to an adhesive composition comprising an ?-olefin homopolymer, an ?-olefin copolymer having a melting point of 90° C. or higher, a tackifier resin, a wax, and a liquid softener, wherein a complex shear modulus (I) measured immediately after heating the adhesive composition to 180° C. and cooling the same to 20° C. is 1 MPa or less.Type: GrantFiled: December 11, 2017Date of Patent: July 19, 2022Assignee: SHOWA DENKO MATERIALS CO., LTD.Inventor: Yuzuru Takahashi
-
Publication number: 20220170820Abstract: A rolling bearing test includes: a hermetic container configured to allow atmosphere gas to be introduced therein; a rotary shaft housed in the hermetic container and fitted into the rolling bearing; a pair of shaft support portions fixed to a fixing portion provided in the hermetic container and configured to rotatably support the rotary shaft at both sides of the rolling bearing in an axial direction, respectively; a drive device configured to drive the rotary shaft; a holding portion configured to hold the outer ring of the rolling bearing to avoid rotation of the outer ring; a first load application mechanism configured to apply an axial load between the inner ring and the outer ring of the rolling bearing; and a second load application mechanism.Type: ApplicationFiled: June 8, 2020Publication date: June 2, 2022Applicants: JTEKT CORPORATION, KANDA CO. LTDInventors: Satoshi FUJIMARU, Yousuke NAGANO, Yuzuru TAKAHASHI, Nobuhiro KANDA, Syuichi MIYABE
-
Publication number: 20200017731Abstract: The present invention relates to an adhesive composition comprising an ?-olefin homopolymer, an ?-olefin copolymer having a melting point of 90° C. or higher, a tackifier resin, a wax, and a liquid softener, wherein a complex shear modulus (I) measured immediately after heating the adhesive composition to 180° C. and cooling the same to 20° C. is 1 MPa or less.Type: ApplicationFiled: December 11, 2017Publication date: January 16, 2020Inventor: Yuzuru TAKAHASHI
-
Patent number: 10113090Abstract: The present invention relates to an adhesive composition comprising: 15 to 25 parts by weight of a 1-butene homopolymer; 12 to 22 parts by weight of an ?-olefin copolymer having a melting point of 90° C. or higher; 30 to 50 parts by weight of a tackifier resin having a softening point of 125° C. or higher; 6 to 22 parts by weight of a polypropylene-based wax; and 4 to 20 parts by weight of a liquid hydrocarbon.Type: GrantFiled: November 26, 2015Date of Patent: October 30, 2018Assignee: HITACHI CHEMICAL COMPANY, LTD.Inventor: Yuzuru Takahashi
-
Publication number: 20180208808Abstract: The present invention relates to an adhesive composition comprising: 15 to 25 parts by weight of a 1-butene homopolymer; 12 to 22 parts by weight of an ?-olefin copolymer having a melting point of 90° C. or higher; 30 to 50 parts by weight of a tackifier resin having a softening point of 125° C. or higher; 6 to 22 parts by weight of a polypropylene-based wax; and 4 to 20 parts by weight of a liquid hydrocarbon.Type: ApplicationFiled: November 26, 2015Publication date: July 26, 2018Inventor: Yuzuru TAKAHASHI
-
Patent number: 9752619Abstract: A double row ball bearing includes: an outer ring; an inner ring; a plurality of first balls disposed between the outer ring and the inner ring to form a first ball row; a plurality of second balls disposed between the outer ring and the inner ring to form a second ball row having a pitch circle diameter larger than that of the first ball row; an annular first cage having a plurality of first pockets in which the first balls are held; an annular second cage having a plurality of second pockets in which the second balls are held; and an annular portion that covers, together with the outer ring, a portion of each second ball held in the second pocket from the radially outside, the portion being exposed on the outside of the second pocket and oriented radially outward.Type: GrantFiled: April 15, 2015Date of Patent: September 5, 2017Assignee: JTEKT CORPORATIONInventors: Yuzuru Takahashi, Daisuke Okamoto, Kouichirou Naitou
-
Publication number: 20150292559Abstract: A double row ball bearing includes: an outer ring; an inner ring; a plurality of first balls disposed between the outer ring and the inner ring to form a first ball row; a plurality of second balls disposed between the outer ring and the inner ring to form a second ball row having a pitch circle diameter larger than that of the first ball row; an annular first cage having a plurality of first pockets in which the first balls are held; an annular second cage having a plurality of second pockets in which the second balls are held; and an annular portion that covers, together with the outer ring, a portion of each second ball held in the second pocket from the radially outside, the portion being exposed on the outside of the second pocket and oriented radially outward.Type: ApplicationFiled: April 15, 2015Publication date: October 15, 2015Inventors: Yuzuru TAKAHASHI, Daisuke OKAMOTO, Kouichirou NAITOU
-
Patent number: 9026892Abstract: A storage device includes a nonvolatile memory, a volatile memory, and a memory controller. The volatile memory includes a free block management table, and a worn block management table. If the number of free blocks is equal to or larger than a threshold value 1, and errors of the number of equal to or larger than a threshold value 2 but smaller than a threshold value 3 are included in the data read from the nonvolatile memory, the memory controller registers the block in the worn block management table as a worn block. If the number of free blocks becomes smaller than the threshold value 1, the memory controller registers the worn block registered in the worn block management table in the free block management table as the free block.Type: GrantFiled: April 9, 2013Date of Patent: May 5, 2015Assignee: Hitachi, Ltd.Inventors: Ryoichi Inada, Ryo Fujita, Yuzuru Takahashi
-
Patent number: 8679254Abstract: [Problem] Provided is a vapor phase epitaxy apparatus of a group III nitride semiconductor including: a susceptor for holding a substrate; the opposite face of the susceptor; a heater for heating the substrate; a reactor formed of a gap between the susceptor and the opposite face of the susceptor; a raw material gas-introducing portion for supplying a raw material gases from the central portion of the reactor toward the peripheral portion of the reactor; and a reacted gas-discharging portion. Even when crystal growth is conducted on the surfaces of a large number of large-aperture substrates, the vapor phase epitaxy apparatus can eject each raw material gas at an equal flow rate for any angle, and can suppress the decomposition and crystallization of the raw material gases on the opposite face of the susceptor.Type: GrantFiled: January 26, 2011Date of Patent: March 25, 2014Assignee: Japan Pionics Co., Ltd.Inventors: Kenji Iso, Yoshiyasu Ishihama, Ryohei Takaki, Yuzuru Takahashi
-
Patent number: 8641290Abstract: A tapered roller bearing according to the present invention, in which the rolling surface of a tapered roller and raceway surfaces of internal and outer rings undergoes crowning. The total crowning amount of that crowning and the crowning amount of each raceway surface and rolling surface are set to preferred values. This allows reduction of the rolling friction of the internal and outer rings and the tapered roller, and the rotation torque of the tapered roller bearing according to the present invention.Type: GrantFiled: February 21, 2005Date of Patent: February 4, 2014Assignee: JTEKT CorporationInventors: Koji Kawaguchi, Yuzuru Takahashi, Kiyoshi Ogino, Hiroki Matsuyama
-
Publication number: 20130275836Abstract: A storage device includes a nonvolatile memory, a volatile memory, and a memory controller. The volatile memory includes a free block management table, and a worn block management table. If the number of free blocks is equal to or larger than a threshold value 1, and errors of the number of equal to or larger than a threshold value 2 but smaller than a threshold value 3 are included in the data read from the nonvolatile memory, the memory controller registers the block in the worn block management table as a worn block. If the number of free blocks becomes smaller than the threshold value 1, the memory controller registers the worn block registered in the worn block management table in the free block management table as the free block.Type: ApplicationFiled: April 9, 2013Publication date: October 17, 2013Applicant: Hitachi, Ltd.Inventors: Ryoichi INADA, Ryo FUJITA, Yuzuru TAKAHASHI
-
Patent number: 8534920Abstract: A rolling bearing includes an outer ring, an inner ring, balls and a cage. The cage includes an annular portion which is disposed at the end portion in the axial direction thereof, and a plurality of pillar portions which protrude to the coaxial direction from the side surface on the one side in the axial direction of the annular portion and are arranged in the circumferential direction thereof so as to form therebetween pockets each for housing a rolling element, wherein a seal gap for restricting the flowing of lubricant is formed between the first annular portion and one of or both the outer ring and the inner ring not guiding the cage.Type: GrantFiled: April 22, 2009Date of Patent: September 17, 2013Assignee: JTEKT CorporationInventors: Tomoyuki Aida, Yuzuru Takahashi, Mikio Kuromatsu, Takeshi Iwawaki
-
Patent number: 8371759Abstract: In a double row rolling bearing for supporting a pinion shaft, an outer ring is fixed to an inner peripheral surface of an annular wall (case) with its axis disposed horizontally, and an inner ring assembly is fitted on a pinion shaft, and is inserted, together with the pinion shaft, horizontally into the outer ring through a larger-diameter opening of the outer ring, and is mounted in the outer ring. A larger-diameter cage has a drop limitation portion for limiting the vertically-downward movement of the larger-diameter case.Type: GrantFiled: April 2, 2007Date of Patent: February 12, 2013Assignee: JTEKT CorporationInventors: Toshirou Fukuda, Yuzuru Takahashi, Toshihiro Kawaguchi, Hiroyuki Ooshima, Kiyokane Iwamoto
-
Publication number: 20110180001Abstract: [Summary] [Problem] Provided is a vapor phase epitaxy apparatus of a group III nitride semiconductor including: a susceptor for holding a substrate; the opposite face of the susceptor; a heater for heating the substrate; a reactor formed of a gap between the susceptor and the opposite face of the susceptor; a raw material gas-introducing portion for supplying a raw material gases from the central portion of the reactor toward the peripheral portion of the reactor; and a reacted gas-discharging portion. Even when crystal growth is conducted on the surfaces of a large number of large-aperture substrates, the vapor phase epitaxy apparatus can eject each raw material gas at an equal flow rate for any angle, and can suppress the decomposition and crystallization of the raw material gases on the opposite face of the susceptor.Type: ApplicationFiled: January 26, 2011Publication date: July 28, 2011Inventors: Kenji ISO, Yoshiyasu Ishihama, Ryohei Takaki, Yuzuru Takahashi
-
Patent number: 7934871Abstract: The large diameter cage has an asymmetric shape, a diameter (discharge diameter) of which close to an opening is larger than a diameter (inflow diameter) close to the small diameter cage, and the small diameter cage has a symmetric shape, in which a diameter (inflow diameter) of which close to an opening is equal to a diameter (discharge diameter) close to the large diameter cage.Type: GrantFiled: March 11, 2008Date of Patent: May 3, 2011Assignee: JTEKT CorporationInventors: Toshihiro Kawaguchi, Toshirou Fukuda, Yuzuru Takahashi
-
Publication number: 20100307418Abstract: Provided is a vapor phase epitaxy apparatus of a group III nitride semiconductor capable of improving the uniformity of the film thickness distribution, and reaction rate, of a semiconductor. The vapor phase epitaxy apparatus of a group III nitride semiconductor includes: a susceptor for holding a substrate; the opposite face of the susceptor; a heater for heating the substrate; a reactor formed of a gap between the susceptor and the opposite face of the susceptor; a raw material gas-introducing portion for supplying a raw material gas to the reactor; and a reacted gas-discharging portion. In the vapor phase epitaxy apparatus of a group III nitride semiconductor, the raw material gas-introducing portion includes a first mixed gas ejection orifice capable of ejecting a mixed gas obtained by mixing three kinds, i.e.Type: ApplicationFiled: June 1, 2010Publication date: December 9, 2010Inventors: Kenji ISO, Yoshiyasu ISHIHAMA, Ryohei TAKAKI, Yuzuru TAKAHASHI
-
Publication number: 20100229794Abstract: Provided is a vapor phase epitaxy apparatus for a III nitride semiconductor, including a susceptor for holding a substrate, an opposite face of the susceptor, a heater for heating the substrate, a raw material gas-introducing portion provided at the central portion of the susceptor, and a reactor formed of a gap between the susceptor and the opposite face of the susceptor, in which a distance between the installed substrate and the opposite face of the susceptor is extremely narrow, and a constitution through which a coolant is flown is provided for the opposite face of the susceptor. The vapor phase epitaxy apparatus further includes, on the opposite face of the susceptor, a fine porous portion for ejecting an inert gas toward the inside of the reactor and a constitution for supplying the inert gas to the fine porous portion.Type: ApplicationFiled: February 26, 2010Publication date: September 16, 2010Inventors: Kenji ISO, Yoshiyasu Ishihama, Ryohei Takaki, Yuzuru Takahashi
-
Patent number: 7677809Abstract: A tapered roller bearing is designed to have a roller loading ratio in the range of 0.7 to 0.92 and a ratio of roller length to roller diameter in the range of 1.1 to 1.7 whereby oil agitation loss and rolling viscous resistance are reduced for achieving the reduction of running torque. Crownings are provided which are designed to have an outer-ring crowning parameter (=RCO/LRO) in the range of 30 to 150 and an inner-ring crowning parameter (=RCI/LRI) in the range of 50 to 260, provided that RCO denotes the radius of an outer ring crowning, LRO denotes the raceway length of an outer ring, RCI denotes the radius of an inner ring crowning and LRI denotes the raceway length of an inner ring. Thus, the rolling viscous resistance is reduced for achieving the reduction of running torque.Type: GrantFiled: April 14, 2005Date of Patent: March 16, 2010Assignee: JTEKT CorporationInventors: Hiroki Matsuyama, Hiroyuki Chiba, Masahiro Harada, Kazutoshi Toda, Kiyoshi Ogino, Koji Kawaguchi, Yuzuru Takahashi, Hirofumi Dodoro