Patents by Inventor Takashi Yajima
Takashi Yajima 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: 11936441Abstract: A FrontHaul Multiplexer (FHM) for relaying communications between a signal processing device and a plurality of radio devices includes a storage unit that stores a table in which device identification information of each of the plurality of radio devices is associated with beam identification information assigned to the radio device; a scheduling information reception unit that receives, from the signal processing device, scheduling information of a user terminal performing radio communications with the plurality of radio devices; a determination unit that acquires from the table the device identification information associated with the beam identification information of uplink included in the scheduling information and then determines from the acquired device identification information the radio device in charge of the user terminal; and a transmission unit that transmits to the signal processing device an uplink signal transmitted from the determined radio device.Type: GrantFiled: November 9, 2018Date of Patent: March 19, 2024Assignee: NTT DOCOMO, INC.Inventors: Takashi Kosugi, Tatsuro Yajima, Takuto Arai, Yuta Sagae, Akihito Hanaki, Hidekazu Shimodaira, Masahiro Fujii, Yoshiaki Ofuji
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Patent number: 11686479Abstract: An encapsulated cleanroom system comprising a processing chamber and a storage section in which the processing chamber is stored, wherein, during operation, the pressure in the storage section is lower or higher than the pressures in the processing chamber and exterior space. The system can simultaneously prevent the entry of outside gases into its processing chamber and the leakage of the gases inside the processing chamber to the exterior space.Type: GrantFiled: March 23, 2021Date of Patent: June 27, 2023Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Shiro Hara, Hitoshi Maekawa, Sommawan Khumpuang, Takashi Yajima, Yuuki Ishida
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Publication number: 20210302034Abstract: An encapsulated cleanroom system comprising a processing chamber and a storage section in which the processing chamber is stored, wherein, during operation, the pressure in the storage section is lower or higher than the pressures in the processing chamber and exterior space. The system can simultaneously prevent the entry of outside gases into its processing chamber and the leakage of the gases inside the processing chamber to the exterior space.Type: ApplicationFiled: March 23, 2021Publication date: September 30, 2021Inventors: Shiro HARA, Hitoshi MAEKAWA, Sommawan KHUMPUANG, Takashi YAJIMA, Yuuki ISHIDA
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Patent number: 10138970Abstract: A coil spring has an effective section that functions as a spring when a load in a coil axis direction has been applied, end turn sections that are formed on both ends of the effective section, and rising sections that are formed between the effective section and the end turn sections, wherein the rising sections are formed in such a way that, when ?1 represents the pitch angle of the rising sections and ?2 represents the pitch angle of the effective section, pitch angle ?1>pitch angle ?2 holds true in at least one of the rising sections.Type: GrantFiled: June 23, 2011Date of Patent: November 27, 2018Assignee: MITSUBISHI STEEL MFG. CO., LTD.Inventors: Takayuki Matsuoto, Kazuhisa Michibata, Satoshi Ieiri, Takashi Yajima
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Patent number: 9429255Abstract: A hollow seamless pipe for a high-strength spring in the present invention includes a steel material in which chemical component compositions are properly adjusted, wherein a depth of a whole decarburized layer in an inner surface layer part is 100 ?m or less, a depth of a flaw which is present in an inner surface is 40 ?m or less, a width of the flaw is 60 ?m or less, and a number density of a carbide which has a circle equivalent diameter of 500 nm or more and is present in the inner surface layer part is 1.8×10?2 particles/?m2 or less.Type: GrantFiled: April 2, 2013Date of Patent: August 30, 2016Assignees: KOBE STEEL, LTD., SHINKO METAL PRODUCTS CO., LTD., NHK SPRING CO., LTD.Inventors: Takuya Kochi, Hitoshi Hatano, Eiichi Tamura, Kotaro Toyotake, Takashi Yajima, Akira Tange
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Patent number: 9358681Abstract: A work hanging apparatus includes a hanger line continuously conveying hangers each having a hook, a robot that has a hand with which a work having a hole is held and transfers the held work to a hanging location set in the hanger line, a controller controlling a movement of the hand to catch the hook of one of the hangers with the hole of the held work at the hanging location, a hole deviation detector that detects a positional deviation of the hole of the work, an attitude deviation detector that detects an attitudinal deviation of the hanger, and a corrector that corrects the movement of the hand according to the positional and attitudinal deviations.Type: GrantFiled: March 7, 2013Date of Patent: June 7, 2016Assignee: NHK Spring Co., Ltd.Inventors: Kotaro Nukui, Takashi Yajima
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Patent number: 9227300Abstract: A straight-shaped hollow spring material is used in a blasting apparatus. The length of the spring material is set to be 1.5 m to 3.5 m, and the inner diameter of the spring material is set to be not more than 10 mm? (not including 0). In inner surface abrasive blasting for the spring material, first and second blastings are performed. In the first blasting, abrasives are ejected to an opening portion of the spring material and are suctioned from a second opening portion thereof. In the second blasting, the abrasives are ejected to the second opening portion and are suctioned from the opening portion. The ejection pressure, the suction pressure, and the like are appropriately set, so that generation of grinding amount difference between the center portion and both end portions of the inner surface of the spring material can be inhibited.Type: GrantFiled: November 24, 2011Date of Patent: January 5, 2016Assignee: NHK SPRING CO., LTD.Inventors: Takashi Yajima, Akira Katsuyama
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Patent number: 9163754Abstract: A resin-made fuel inlet pipe that has a light weight, excellent impact resistance, and causes no fuel leakage includes at least one resin layer comprising a resin composition containing (A) a high-density polyethylene (HDPE) or a linear short-chain branched polyethylene; (B) a polyethylene polymerized with a metallocene-based catalyst; and (C) a carbon black. A weight mixing ratio ((A)/(B)) is in a range of from 10/90 to 90/10; a content of component (C) is in a range of from 0.1 to 5 parts by weight with respect to 100 parts by weight of a total of components (A) and (B); a tissue (Y) comprising component (B) is inserted between linear crystalline tissues (X) comprising component (A) to expand an interval between the tissues (X); and component (C) is dispersed in the tissue (Y).Type: GrantFiled: April 12, 2013Date of Patent: October 20, 2015Assignee: SUMITOMO RIKO COMPANY LIMITEDInventors: Takashi Yajima, Koji Mizutani, Kazutaka Katayama, Shinya Nishikawa, Hiroshi Hayami
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Publication number: 20150285410Abstract: A hollow seamless pipe for a high-strength spring in the present invention includes a steel material in which chemical component compositions are properly adjusted, wherein a depth of a whole decarburized layer in an inner surface layer part is 100 ?m or less, a depth of a flaw which is present in an inner surface is 40 ?m or less, a width of the flaw is 60 ?m or less, and a number density of a carbide which has a circle equivalent diameter of 500 nm or more and is present in the inner surface layer part is 1.8×10?2 particles/?m2 or less.Type: ApplicationFiled: April 2, 2013Publication date: October 8, 2015Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD), SHINKO METAL PRODUCTS CO., LTD., NHK SPING CO., LTD.Inventors: Takuya Kochi, Hitoshi Hatano, Eiichi Tamura, Kotaro Toyotake, Takashi Yajima, Akira Tange
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Patent number: 9145941Abstract: In an end sealing step, an end is sealed by which the core material of the end of a spring member is gathered by machining. For example, a squeezing roller is moved in an axial direction as necessary, while the end of the spring member is pressed to the inside in a radial direction by the squeezing roller. As a result, the end of the spring member is sealed and therefore, it is not necessary to use another member such as a lid member. For example, the end sealing step can be immediately carried out after an inner surface processing step. In a coil forming step after the end sealing step, formation of clearance can be prevented at the end even if the end of the spring member is gripped and the spring member is wound around the rod.Type: GrantFiled: November 24, 2011Date of Patent: September 29, 2015Assignee: NHK SPRING CO., LTD.Inventors: Takashi Yajima, Kenichiro Morino
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Patent number: 9056349Abstract: A coil wire material is bent by a first roll, a second roll, and a third roll. The bent coil wire material is pressed in a screwing direction, to shape a coil spring having a desired diameter and a pitch. A desired pitch can be accurately formed in a manner that a second roll provided on a downstream side of a conveying direction of the coil wire material is configured to be able to move hack and forth along the screwing direction of the coil spring and to be tiltable about an axis of rotation parallel to the conveying direction of the coil wire material.Type: GrantFiled: January 25, 2013Date of Patent: June 16, 2015Assignee: NHK SPRING CO., LTD.Inventors: Akira Katsuyama, Takayuki Morishima, Takashi Yajima, Yuji Mori, Kotaro Nukui
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Patent number: 8983650Abstract: A work hanging apparatus includes a hanger line continuously conveying hangers each having a hook, a robot that has a hand with which a work having a hole is held and transfers the held work to a hanging location set in the hanger line, a controller controlling a movement of the hand to catch the hook of one of the hangers with the hole of the held work at the hanging location, a hole deviation detector that detects a positional deviation of the hole of the work, an attitude deviation detector that detects an attitudinal deviation of the hanger, and a corrector that corrects the movement of the hand according to the positional and attitudinal deviations.Type: GrantFiled: March 7, 2013Date of Patent: March 17, 2015Assignee: NHK Spring Co., Ltd.Inventors: Kotaro Nukui, Takashi Yajima
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Publication number: 20150021505Abstract: An inlet flow passage, a valve seat section, and a valve chamber are formed within a flow passage block. An operation chamber, a rocking chamber, and a drive chamber are formed within a case along a reference plane. A valve rod is brought into contact with and separated from the valve seat section by reciprocating through the operation chamber in an extending direction thereof. A piston rod reciprocates through the drive chamber in an extending direction thereof. A lever member is received in the rocking chamber and has a support shaft section. The distance between the center of the support shaft section and a second contact position where the piston rod contacts the lever member is set greater than the distance between the center of the support shaft section and a first contact position where the valve rod contacts the lever member.Type: ApplicationFiled: August 26, 2014Publication date: January 22, 2015Inventors: Shinichi NITTA, Takashi YAJIMA
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Publication number: 20140193597Abstract: A resin fuel tube is provided, which includes at least one resin layer, wherein the resin layer is made of a resin composition comprising: (A) a polypropylene prepared through polymerization with the use of a metallocene catalyst; and (B) a polypropylene material having a melting point of 137° C. to 160° C., the resin composition having a mixing weight ratio of the components (A) and (B) satisfying (A)/(B)=95/5 to 50/50, wherein the resin layer has a structure such that a soft structural portion (Y) of the component (A) intrudes into a space between crystalline structural portions (X) of the component (B). Therefore, the resin fuel tube is light-weight, excellent in impact resistance and heat resistance, free from fuel leakage, and usable in an atmosphere at 130° C. or higher, for example, in an automotive engine room or the like.Type: ApplicationFiled: March 10, 2014Publication date: July 10, 2014Applicant: TOKAI RUBBER INDUSTRIES, LTD.Inventors: Takashi Yajima, Koji Mizutani, Kazutaka Katayama
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Patent number: 8765244Abstract: A resin-made fuel inlet pipe having a light weight excellent impact resistance, and causing no fuel leakage, includes: a tubular inner layer; and an outer layer laminated on an outer peripheral surface thereof, in which: the inner layer is formed of a resin having fuel resistance; the outer layer is formed of a resin (A) having a tensile elongation at 8 m/s measured by a high-speed tensile test of 200% or more; and the inner layer and the outer layer are in a substantially non-adherent state.Type: GrantFiled: October 31, 2012Date of Patent: July 1, 2014Assignee: Tokai Rubber Industries, Ltd.Inventors: Takashi Yajima, Koji Mizutani, Kazutaka Katayama
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Publication number: 20130292890Abstract: In an end sealing step, an end is sealed by which the core material of the end of a spring member is gathered by machining. For example, a squeezing roller is moved in an axial direction as necessary, while the end of the spring member is pressed to the inside in a radial direction by the squeezing roller. As a result, the end of the spring member is sealed and therefore, it is not necessary to use another member such as a lid member. For example, the end sealing step can be immediately carried out after an inner surface processing step. In a coil forming step after the end sealing step, formation of clearance can be prevented at the end even if the end of the spring member is gripped and the spring member is wound around the rod.Type: ApplicationFiled: November 24, 2011Publication date: November 7, 2013Applicant: NHK SPRING CO., LTD.Inventors: Takashi Yajima, Kenichiro Morino
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Publication number: 20130245814Abstract: A work hanging apparatus includes a hanger line continuously conveying hangers each having a hook, a robot that has a hand with which a work having a hole is held and transfers the held work to a hanging location set in the hanger line, a controller controlling a movement of the hand to catch the hook of one of the hangers with the hole of the held work at the hanging location, a hole deviation detector that detects a positional deviation of the hole of the work, an attitude deviation detector that detects an attitudinal deviation of the hanger, and a corrector that corrects the movement of the hand according to the positional and attitudinal deviations.Type: ApplicationFiled: March 7, 2013Publication date: September 19, 2013Applicant: NHK SPRING CO., LTD.Inventors: Kotaro NUKUI, Takashi YAJIMA
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Publication number: 20130241121Abstract: A straight-shaped hollow spring material is used in a blasting apparatus. The length of the spring material is set to be 1.5 m to 3.5 m, and the inner diameter of the spring material is set to be not more than 10 mm? (not including 0). In inner surface abrasive blasting for the spring material, first and second blastings are performed. In the first blasting, abrasives are ejected to an opening portion of the spring material and are suctioned from a second opening portion thereof. In the second blasting, the abrasives are ejected to the second opening portion and are suctioned from the opening portion. The ejection pressure, the suction pressure, and the like are appropriately set, so that generation of grinding amount difference between the center portion and both end portions of the inner surface of the spring material can be inhibited.Type: ApplicationFiled: November 24, 2011Publication date: September 19, 2013Applicant: NHK SPRING CO., LTD.Inventors: Takashi Yajima, Akira Katsuyama
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Patent number: 8460483Abstract: A method for heat treatment of a coiled spring includes cold forming a coiled spring, annealing the coiled spring after the cold forming, thereby removing of residual stress generated in the cold forming, in which the annealing is performed by electric resistance heating.Type: GrantFiled: March 21, 2011Date of Patent: June 11, 2013Assignee: NHK Spring Co., Ltd.Inventors: Takashi Yajima, Hideki Okada, Katsuyuki Nishioka, Takeshi Furuse
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Publication number: 20130099435Abstract: A coil spring has an effective section that functions as a spring when a load in a coil axis direction has been applied, end turn sections that are formed on both ends of the effective section, and rising sections that are formed between the effective section and the end turn sections, wherein the rising sections are formed in such a way that, when ?1 represents the pitch angle of the rising sections and ?2 represents the pitch angle of the effective section, pitch angle ?1> pitch angle ?2 holds true in at least one of the rising sections.Type: ApplicationFiled: June 23, 2011Publication date: April 25, 2013Applicant: MITSUBISHI STEEL MFG CO., LTD.Inventors: Takayuki Matsuoto, Kazuhisa Michibata, Satoshi Ieiri, Takashi Yajima