Patents by Inventor Hiroyasu Toyooka
Hiroyasu Toyooka 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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Publication number: 20190391343Abstract: An optical connector includes a first housing and a second housing which is attached to a rear portion of the first housing in an attachable and detachable manner. The second housing includes a first latch portion and a second latch portion which extend from the rear portion toward the front portion so as to respectively engage with an adapter or a receptacle in a first connector inlet and a second connector inlet. The second housing is attachable to the rear portion in both of a state in which the first latch portion and the second latch portion are located on one side of the first housing in a third direction intersecting the first direction and the second direction and a state in which the first latch portion and the second latch portion are located on other side thereof.Type: ApplicationFiled: October 12, 2017Publication date: December 26, 2019Applicants: SEI Optifrontier Co., Ltd., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Yohei AOSHIMA, Tomoyuki YOKOKAWA, Yuji SUZUKI, Hiroyasu TOYOOKA
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Patent number: 10101551Abstract: A multi-core/single-core conversion module is disclosed. The multi-core/single-core conversion module includes a housing including a first end, a second end and a lateral wall defining an inner space between the first end and the second end, a first adapter attached to the first end of the housing, two or more second adapters attached to the second end of the housing, a multi-core optical connector inserted into the first adapter from the inner space of the housing, a plurality of single-core optical connectors respectively inserted into the second adapters from the inner space of the housing, and a plurality of optical fibers connecting the multi-core optical connector to the plurality of single-core optical connectors with each other. The second adapters are arranged on the second end across a plurality of tiers. An opening can be formed by a part of the lateral wall being detached.Type: GrantFiled: June 5, 2017Date of Patent: October 16, 2018Assignees: SEI OPTIFRONTIER CO., LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Junji Fukui, Kenichiro Ohtsuka, Yuji Suzuki, Hiroyasu Toyooka, Takayuki Suzuki
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Publication number: 20170359091Abstract: A multi-core/single-core conversion module is disclosed. The multi-core/single-core conversion module includes a housing including a first end, a second end and a lateral wall defining an inner space between the first end and the second end, a first adapter attached to the first end of the housing, two or more second adapters attached to the second end of the housing, a multi-core optical connector inserted into the first adapter from the inner space of the housing, a plurality of single-core optical connectors respectively inserted into the second adapters from the inner space of the housing, and a plurality of optical fibers connecting the multi-core optical connector to the plurality of single-core optical connectors with each other. The second adapters are arranged on the second end across a plurality of tiers. An opening can be formed by a part of the lateral wall being detached.Type: ApplicationFiled: June 5, 2017Publication date: December 14, 2017Applicants: SEI Optifrontier Co., Ltd., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Junji FUKUI, Kenichiro OHTSUKA, Yuji SUZUKI, Hiroyasu TOYOOKA, Takayuki SUZUKI
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Patent number: 9395492Abstract: A slider is attached to a cutter main body of an optical fiber cutter in a forward/backward movable state. A round blade member for making a scratch in an optical fiber is attached to the slider in a rotatable state. An operation lever pin for changing over rotation operation modes from one to another is attached to one end side of a pin member which penetrates a wall of the cutter main body. The rotation operation modes include a non-rotation mode for preventing the round blade member from being rotated and a continuous rotation mode for rotating the round blade member by a predetermined angle with every backward movement of the slider.Type: GrantFiled: March 15, 2012Date of Patent: July 19, 2016Assignee: SEI Optifrontier Co., Ltd.Inventors: Masahiro Hasegawa, Hiroyasu Toyooka, Hiroshi Nakamura
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Patent number: 9235005Abstract: A method of fusion-splicing includes attaching a stab to a stub cap having a non-axisymmetric structure, positioning an embedded optical fiber to a fusion splicing working part by fixing the stub cap thereto; positioning an outside optical fiber to the fusion splicing working part; fusion-splicing the embedded optical fiber and the outside optical fiber; repositioning the embedded optical fiber to a reinforcing working part by fixing the stub cap thereto and repositioning the outside optical fiber to the reinforcing working part such that a relative positional relationship between the embedded optical fiber and the outside optical fiber becomes the same as that at the fusion splicing working part; and reinforcing a spliced portion between the embedded optical fiber and the outside optical fiber while a tension is applied to the embedded optical fiber and the outside optical fiber.Type: GrantFiled: February 2, 2012Date of Patent: January 12, 2016Assignee: SEI OPTIFRONTIER CO., LTD.Inventors: Ryuichiro Sato, Hiroyasu Toyooka, Hiroshi Takayanagi
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Patent number: 8861920Abstract: An optical fiber holder includes a holder main body and cord receiving groove. The holder main body has a fiber receiving groove and a first cord receiving groove. The fiber receiving groove receives and positions a coated optical fiber of an optical fiber cord with a cord jacket removed at the tip of the optical fiber cord. The cord receiving groove receives the cord jacket. A cord holding cover and a fiber pressing cover 13 are attached to the holder main body 6 for movement between respective open closed positions. The cord holder cover includes a second cord receiving groove that cooperates with the first cord receiving groove to form an insertion through hole having a circular cross-section that allows for insertion of the optical fiber. The fiber pressing cover presses the coated optical fiber against the holder main body with the coated optical fiber in the fiber receiving groove.Type: GrantFiled: December 17, 2010Date of Patent: October 14, 2014Assignee: Sumitomo Electric Industries, Ltd.Inventors: Ryuichiro Sato, Hiroyasu Toyooka, Toshihiko Homma, Kiyotaka Murashima
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Patent number: 8641300Abstract: A spliced optical cable assembly is reinforced at a spliced portion of coated optical fibers to have adequate strength. The spliced optical cable assembly includes: a pair of optical fiber cables in which high-strength fibers are aligned in the longitudinal direction around coated optical fibers. The outer circumference of the coated optical fibers being covered by sheaths. The spliced optical cable assembly further includes a connecting portion in which the pair of optical fiber cables are connected and the coated optical fibers extend from the sheaths. Glass fibers exposed from the coating of the coated optical fibers spliced to each other. The connected portion is covered and formed into an integral unit, together with the high-strength fibers exposed from the sheaths, by a reinforcing tube placed over the optical fiber cables and caused to contract so that both ends of the reinforcing tube engage the sheaths of the respective optical fiber cables.Type: GrantFiled: October 1, 2010Date of Patent: February 4, 2014Assignee: Sumitomo Electric Industries, Ltd.Inventors: Kiyotaka Murashima, Hiroyasu Toyooka, Toshihiko Homma, Ryuichiro Sato, Keitaro Iwai
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Publication number: 20140000434Abstract: A slider is attached to a cutter main body of an optical fiber cutter in a forward/backward movable state. A round blade member for making a scratch in an optical fiber is attached to the slider in a rotatable state. An operation lever pin for changing over rotation operation modes from one to another is attached to one end side of a pin member which penetrates a wall of the cutter main body. The rotation operation modes include a non-rotation mode for preventing the round blade member from being rotated and a continuous rotation mode for rotating the round blade member by a predetermined angle with every backward movement of the slider.Type: ApplicationFiled: March 15, 2012Publication date: January 2, 2014Applicant: SEI OPTIFRONTIER CO., LTD.Inventors: Masahiro Hasegawa, Hiroyasu Toyooka, Hiroshi Nakamura
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Publication number: 20130277356Abstract: A method of fusion-splicing includes attaching a stab to a stub cap having a non-axisymmetric structure, positioning an embedded optical fiber to a fusion splicing working part by fixing the stub cap thereto; positioning an outside optical fiber to the fusion splicing working part; fusion-splicing the embedded optical fiber and the outside optical fiber; repositioning the embedded optical fiber to a reinforcing working part by fixing the stub cap thereto and repositioning the outside optical fiber to the reinforcing working part such that a relative positional relationship between the embedded optical fiber and the outside optical fiber becomes the same as that at the fusion splicing working part; and reinforcing a spliced portion between the embedded optical fiber and the outside optical fiber while a tension is applied to the embedded optical fiber and the outside optical fiber.Type: ApplicationFiled: February 2, 2012Publication date: October 24, 2013Applicant: SEI Optifrontier Co., Ltd.Inventors: Ryuichiro Sato, Hiroyasu Toyooka, Hiroshi Takayanagi
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Publication number: 20120251068Abstract: An optical fiber holder includes a holder main body and cord receiving groove. The holder main body has a fiber receiving groove and a first cord receiving groove. The fiber receiving groove receives and positions a coated optical fiber of an optical fiber cord with a cord jacket removed at the tip of the optical fiber cord. The cord receiving groove receives the cord jacket. A cord holding cover and a fiber pressing cover 13 are attached to the holder main body 6 for movement between respective open closed positions. The cord holder cover includes a second cord receiving groove that cooperates with the first cord receiving groove to form an insertion through hole having a circular cross-section that allows for insertion of the optical fiber. The fiber pressing cover presses the coated optical fiber against the holder main body with the coated optical fiber in the fiber receiving groove.Type: ApplicationFiled: December 17, 2010Publication date: October 4, 2012Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Ryuichiro Sato, Hiroyasu Toyooka, Toshihiko Homma, Kiyotaka Murashima
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Publication number: 20120243838Abstract: A reinforcing member of optical fiber fusion-splicing portion and a reinforcing method thereof are provided, in which plural coated optical fibers can be collectively reinforced in the high density, and a heating mechanism for collective reinforcement can be configured at a low cost. A reinforcing member 12 which reinforces collectively fusion-splicing portions 12a of plural coated optical fibers 11 includes a heat-shrinkable tube 13, a rod-shaped tensile strength member 14 arranged so that a part of its surface comes into contact with an inner surface of the heat-shrinkable tube, and plural tube-shaped heat-fusible adhesive members 15 arranged in the heat-shrinkable tube and into which the fusion-splicing portions of the single-core coated optical fibers are individually inserted. All of the plural tube-shaped heat-fusible adhesive members 15 are arranged in one of space portions formed between the tensile strength body 14 and the heat-shrinkable tube.Type: ApplicationFiled: November 25, 2010Publication date: September 27, 2012Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Ryuichiro Sato, Hiroyasu Toyooka, Toshihiko Homma, Kiyotaka Murashima
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Publication number: 20120201500Abstract: A spliced optical cable assembly is reinforced at a spliced portion of coated optical fibers to have adequate strength. The spliced optical cable assembly includes: a pair of optical fiber cables in which high-strength fibers are aligned in the longitudinal direction around coated optical fibers. The outer circumference of the coated optical fibers being covered by sheaths. The spliced optical cable assembly further includes a connecting portion in which the pair of optical fiber cables are connected and the coated optical fibers extend from the sheaths. Glass fibers exposed from the coating of the coated optical fibers spliced to each other. The connected portion is covered and formed into an integral unit, together with the high-strength fibers exposed from the sheaths, by a reinforcing tube placed over the optical fiber cables and caused to contract so that both ends of the reinforcing tube engage the sheaths of the respective optical fiber cables.Type: ApplicationFiled: October 1, 2010Publication date: August 9, 2012Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kiyotaka Murashima, Hiroyasu Toyooka, Toshihiko Homma, Ryuichiro Sato, Keitato Iwai
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Publication number: 20040042756Abstract: A circuit connection method using an optical fiber array capable of connecting the optical fiber array to an optical part through circuits, comprising the steps of preparing the optical fiber array having a marker visible from the upper or side surface of the optical fiber array disposed parallel with an optical fiber (1) while maintaining specified interval from the disposed position of the fiber (1), and aligning the position of the end face of the marker of the optical fiber array to a marker provided on the optical part, whereby, an operation allowing monitor light to be mutually transmitted between the core part of the optical fiber and the core part of an optical wave guiding passage can be performed easily by roughly matching the position of the core part of an optical fiber to the position of the core part of an optical wave guiding passage opposedly to each other as a preliminary stage for aligning operation.Type: ApplicationFiled: June 23, 2003Publication date: March 4, 2004Inventors: Yukihiro Yokomachi, Hiroyasu Toyooka
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Patent number: 6497516Abstract: The guide pin (P) in accordance with the present invention is a guide pin (P) having a predetermined pin diameter to be inserted into a guide pin insertion hole (9) of a ferrule (11); which is configured to have an inserting portion (31) penetrating through the ferrule (11), and an engagement portion (32), having a diameter greater than that of the guide pin insertion hole (9), adapted to abut against the back face (11b) of the ferrule (11).Type: GrantFiled: June 1, 2000Date of Patent: December 24, 2002Assignees: Sumitomo Electric Industries, Ltd., Hitachi, Ltd.Inventors: Hiroyasu Toyooka, Koji Kashihara, Atsushi Takai, Atsushi Miura
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Patent number: D692739Type: GrantFiled: September 22, 2011Date of Patent: November 5, 2013Assignee: SEI Optifrontier Co., Ltd.Inventors: Masahiro Hasegawa, Hiroyasu Toyooka, Hiroshi Nakamura
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Patent number: D692740Type: GrantFiled: September 22, 2011Date of Patent: November 5, 2013Assignee: SEI Optifrontier Co., Ltd.Inventors: Masahiro Hasegawa, Hiroyasu Toyooka, Hiroshi Nakamura
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Patent number: D694602Type: GrantFiled: September 22, 2011Date of Patent: December 3, 2013Assignee: SEI Optifrontier Co., Ltd.Inventors: Masahiro Hasegawa, Hiroyasu Toyooka, Hiroshi Nakamura
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Patent number: D709286Type: GrantFiled: May 1, 2012Date of Patent: July 22, 2014Assignee: SEI Optrifrontier Co., Ltd.Inventors: Hiroshi Takayanagi, Teruaki Nishida, Hisao Yui, Hiroyasu Toyooka
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Patent number: D746885Type: GrantFiled: October 30, 2013Date of Patent: January 5, 2016Assignee: SEI Optifrontier Co., Ltd.Inventors: Ryuichiro Sato, Hiroyasu Toyooka, Kensuke Ito
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Patent number: D759138Type: GrantFiled: August 12, 2015Date of Patent: June 14, 2016Assignee: SEI Optifrontier Co., Ltd.Inventors: Ryuichiro Sato, Hiroyasu Toyooka, Kensuke Ito