Patents by Inventor Mitsuru Kihara
Mitsuru Kihara 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: 11262503Abstract: A fiber cutter includes: a base including a fiber grip that grips an optical fiber; a slider including a fiber end grip that grips an end portion of the optical fiber, wherein the slider moves relative to the base; a cut former including a blade forming an initial cut in the optical fiber and disposed between the fiber grip and the fiber end grip; and a spring that applies a force between the base and the slider to apply a tension to the optical fiber gripped by the fiber grip and the fiber end grip, wherein the cut former is disposed on the slide, and when the initial cut grows and the optical fiber cleaves, the cut former moves together with the slider by the force of the spring.Type: GrantFiled: May 7, 2018Date of Patent: March 1, 2022Assignees: FUJIKURA LTD., NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takaharu Matsuda, Kunihiko Fujiwara, Ryo Koyama, Mitsuru Kihara
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Patent number: 11054589Abstract: An optical connector includes: an optical receptacle; and an optical plug that is attachable to and detachable from the optical receptacle. The optical receptacle includes receptacle-side connector modules that each include: an outer housing; an inner housing; a receptacle-side ferrule housed in the inner housing; and a receptacle-side spring that applies pressure to the receptacle-side ferrule. The optical plug includes plug-side connector modules that each include: a plug-side housing; a plug-side ferrule housed in the plug-side housing; and a plug-side spring that applies pressure to the plug-side ferrule. The inner housing includes an engagement section. The plug-side housing includes an engaged section.Type: GrantFiled: December 28, 2017Date of Patent: July 6, 2021Assignees: Fujikura Ltd., NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takahito Otomitsu, Mitsuru Kihara, Ryo Koyama
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Patent number: 10859767Abstract: An optical fiber cutter includes: a base member; a movable member that clamps the optical fiber extending from a fiber holder and that moves with respect to the base member between an advanced position and a retracted position in an extending direction of the optical fiber; a biasing member that biases the movable member at the retracted position forward; a locking member that regulates forward movement of the movable member at the retracted position; a cutter supporter that supports a blade that forms an initial cut in the optical fiber, that moves in a direction that intersects with the extending direction of the optical fiber, and that forms the initial cut at an initial cut forming position between the fiber holder and the movable member; and an unlocking member that releases the regulation of forward movement of the movable member before the blade reaches the initial cut forming position.Type: GrantFiled: November 20, 2017Date of Patent: December 8, 2020Assignee: Fujikura, Ltd.Inventors: Takaharu Matsuda, Kunihiko Fujiwara, Ryo Koyama, Mitsuru Kihara
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Publication number: 20200249404Abstract: An optical connector includes: an optical receptacle; and an optical plug that is attachable to and detachable from the optical receptacle. The optical receptacle includes receptacle-side connector modules that each include: an outer housing; an inner housing; a receptacle-side ferrule housed in the inner housing; and a receptacle-side spring that applies pressure to the receptacle-side ferrule. The optical plug includes plug-side connector modules that each include: a plug-side housing; a plug-side ferrule housed in the plug-side housing; and a plug-side spring that applies pressure to the plug-side ferrule. The inner housing includes an engagement section. The plug-side housing includes an engaged section.Type: ApplicationFiled: December 28, 2017Publication date: August 6, 2020Applicants: Fujikura Ltd., NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takahito Otomitsu, Mitsuru Kihara, Ryo Koyama
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Publication number: 20200103592Abstract: A fiber cutter includes: a base including a fiber grip that grips an optical fiber; a slider including a fiber end grip that grips an end portion of the optical fiber, wherein the slider moves relative to the base; a cut former including a blade forming an initial cut in the optical fiber and disposed between the fiber grip and the fiber end grip; and a spring that applies a force between the base and the slider to apply a tension to the optical fiber gripped by the fiber grip and the fiber end grip, wherein the cut former is disposed on the slide, and when the initial cut grows and the optical fiber cleaves, the cut former moves together with the slider by the force of the spring.Type: ApplicationFiled: May 7, 2018Publication date: April 2, 2020Applicants: Fujikura Ltd., NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takaharu Matsuda, Kunihiko Fujiwara, Ryo Koyama, Mitsuru Kihara
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Publication number: 20190339453Abstract: An optical fiber cutter includes: a base member; a movable member that clamps the optical fiber extending from a fiber holder and that moves with respect to the base member between an advanced position and a retracted position in an extending direction of the optical fiber; a biasing member that biases the movable member at the retracted position forward; a locking member that regulates forward movement of the movable member at the retracted position; a cutter supporter that supports a blade that forms an initial cut in the optical fiber, that moves in a direction that intersects with the extending direction of the optical fiber, and that forms the initial cut at an initial cut forming position between the fiber holder and the movable member; and an unlocking member that releases the regulation of forward movement of the movable member before the blade reaches the initial cut forming position.Type: ApplicationFiled: November 20, 2017Publication date: November 7, 2019Applicants: Fujikura Ltd., NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takaharu Matsuda, Kunihiko Fujiwara, Ryo Koyama, Mitsuru Kihara
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Patent number: 8511910Abstract: It is an object to obtain an optical connector capable of implementing a more reduction in a cost of a work for carrying out an assembly into a site optical fiber, and a method of assembling the optical connector. An almost sheet-like protecting member 17 for transmitting a light in a predetermined refractive index is stuck to a tip surface of a ferrule 3 having a fiber inserting hole 15 penetrating therethrough with the fiber inserting hole 15 covered, and an optical fiber 14 positioned by a positioning mechanism 5 to be coupled to a rear part of the ferrule 3 has a tip surface inserted through the fiber inserting hole 15 of the ferrule 3 to abut on the protecting member 17 with an elastic force.Type: GrantFiled: May 9, 2008Date of Patent: August 20, 2013Assignees: Sumitomo Electric Industries, Ltd., Nippon Telegraph and Telephone CorporationInventors: Kenichiro Ohtsuka, Masaki Ohmura, Masahiro Hamada, Mitsuru Kihara, Hitoshi Son
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Patent number: 8480311Abstract: An optical connector in which works of attaching an incorporated optical fiber to a ferrule, removing a coating of the tip end side of a coated optical fiber, and attaching an optical connector to the coated optical fiber can be made more efficient, and the transmission characteristics can be prevented from being lowered in the optical connector, and a method of attaching the optical connector to a coated optical fiber are provided. An optical connector 101 includes: a ferrule 140 into which a glass fiber 121 that is obtained by peeling a coating 124 of a coated optical fiber 120 is to be inserted; a fixing portion 130 which fixes the coated optical fiber 120 inserted into the ferrule 140; and a coating-removing portion 110 which removes the coating 124 from an end portion of the coated optical fiber 120, by means of a force of inserting the coated optical fiber 120 into the optical connector 101.Type: GrantFiled: October 24, 2008Date of Patent: July 9, 2013Assignee: Sumitomo Electric Industries, Ltd.Inventors: Kenichiro Ohtsuka, Masahiro Hamada, Masaki Ohmura, Mitsuaki Tamura, Mitsuru Kihara, Ryo Koyama, Hitoshi Son
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Patent number: 8292514Abstract: To provide an optical connecting member capable of positioning and connecting a coated fiber by a simple connecting work with high precision, and a method of fitting the same.Type: GrantFiled: November 14, 2008Date of Patent: October 23, 2012Assignee: Sumitomo Electric Industries, Ltd.Inventors: Kenichiro Ohtsuka, Masaki Ohmura, Mitsuaki Tamura, Masahiro Hamada, Mitsuru Kihara, Ryo Koayama
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Publication number: 20100290740Abstract: It is an object to obtain an optical connector capable of implementing a more reduction in a cost of a work for carrying out an assembly into a site optical fiber, and a method of assembling the optical connector. An almost sheet-like protecting member 17 for transmitting a light in a predetermined refractive index is stuck to a tip surface of a ferrule 3 having a fiber inserting hole 15 penetrating therethrough with the fiber inserting hole 15 covered, and an optical fiber 14 positioned by a positioning mechanism 5 to be coupled to a rear part of the ferrule 3 has a tip surface inserted through the fiber inserting hole 15 of the ferrule 3 to abut on the protecting member 17 with an elastic force.Type: ApplicationFiled: May 9, 2008Publication date: November 18, 2010Inventors: Kenichiro Ohtsuka, Masaki Ohmura, Masahiro Hamada, Mitsuru Kihara, Hiotoshi Son
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Publication number: 20100284654Abstract: To provide an optical connecting member capable of positioning and connecting a coated fiber by a simple connecting work with high precision, and a method of fitting the same.Type: ApplicationFiled: November 14, 2008Publication date: November 11, 2010Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kenichiro Ohtsuka, Masaki Ohmura, Mitsuaki Tamura, Masahiro Hamada, Ryo Koyama, Mitsuru Kihara
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Publication number: 20100247039Abstract: It is an object to obtain an optical connector capable of executing an assembling work safely and easily without causing a problem, for example, a breakage of an end face of a short optical fiber provided in a ferrule when assembling a site optical fiber, and a method of assembling the optical connector. In an optical connector having a ferrule 3 including a short optical fiber 12 and a positioning mechanism 5 for placing and fixing an optical fiber 14 to be connected to the short optical fiber 12 in a predetermined position, an end face of the short optical fiber 12 and that of the optical fiber 14 are matched with each other through an almost sheet-like protecting member 17 for transmitting a light in a predetermined refractive index and the optical fiber 14 is positioned by an application of an elastic force to the short optical fiber 12 side.Type: ApplicationFiled: May 9, 2008Publication date: September 30, 2010Inventors: Kenichiro Ohtsuka, Masaki Ohmura, Masahiro Hamada, Mitsuru Kihara, Hiotoshi Son
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Publication number: 20100220960Abstract: An optical connector in which works of attaching an incorporated optical fiber to a ferrule, removing a coating of the tip end side of a coated optical fiber, and attaching an optical connector to the coated optical fiber can be made more efficient, and the transmission characteristics can be prevented from being lowered in the optical connector, and a method of attaching the optical connector to a coated optical fiber are provided. An optical connector 101 includes: a ferrule 140 into which a glass fiber 121 that is obtained by peeling a coating 124 of a coated optical fiber 120 is to be inserted; a fixing portion 130 which fixes the coated optical fiber 120 inserted into the ferrule 140; and a coating-removing portion 110 which removes the coating 124 from an end portion of the coated optical fiber 120, by means of a force of inserting the coated optical fiber 120 into the optical connector 101.Type: ApplicationFiled: October 24, 2008Publication date: September 2, 2010Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kenichiro Ohtsuka, Masahiro Hamada, Masaki Ohmura, Mitsuaki Tamura, Mitsuru Kihara, Ryo Koyama, Hitoshi Son
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Publication number: 20100187276Abstract: An optical fiber cutting device and method, and optical fiber cutting blade member in which excellent workability is obtained by a simple configuration, and a cost reduction can be attained are provided.Type: ApplicationFiled: October 24, 2008Publication date: July 29, 2010Inventors: Masaki Ohmura, Kenichiro Ohtsuka, Mitsuaki Tamura, Katsuji Sakamoto, Mitsuru Kihara, Hitochi Son, Ryo Koyama
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Patent number: 5963699Abstract: Productivity of switching optical connections is improved significantly with the mechanical splice presented. A single fiber cable or a fiber tape, with the bare fiber exposed at the tip, is inserted from the terminal ends of an aligner element, and are clamped between a lid and a base member of the aligner element, A U-shaped spring clamp is coupled to the aligner element to secure the cables clamped in the aligner element. After the aligner element is closed and coupled into the spring clamp, wedge insertion openings provided in the front face of the aligner element enable to lift the lid member from the base member sufficiently to enable removal of one or both of the cables. The mechanical splice is constructed simply and ruggedly so that cables can be connected or disconnected manually by coupling the aligner element into or decoupling from the spring clamp.Type: GrantFiled: May 23, 1997Date of Patent: October 5, 1999Assignees: Fujikura Ltd., Nippon Telegraph and Telephone CorporationInventors: Toshiyuki Tanaka, Yasuhiro Tamaki, Hiroshi Yokosuka, Shinji Nagasawa, Mitsuru Kihara