Patents by Inventor Yoshiteru Abe

Yoshiteru Abe 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: 11543612
    Abstract: To provide a connector plug that makes it possible to facilitate a plurality of persons' confirmation of a connector plug before its removal or after its insertion and to prevent erroneous work. The connector plug according to the present invention has a discoloration member mounted on a gripping portion for pinching during work. The color of the discoloration member changes due to heat of a worker's fingertips when the worker pinches the connector plug or pressure when the worker pinches the connector plug. The discoloration member is discolored by one worker pinching the connector plug. Another worker looks at the discolored discoloration member, and then is able to confirm whether the connector plug is a work target.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: January 3, 2023
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masaaki Takaya, Yoshiteru Abe, Ryo Koyama, Chisato Fukai, Kazunori Katayama
  • Patent number: 11474303
    Abstract: An object is to provide an optical fiber connector ferrule, a sleeve, and a method for manufacturing a ferrule member that can avoid an increase in manufacturing time and an increase in cost of optical connectors for connecting multicore optical fibers. The present invention provides an optical fiber connector ferrule, a sleeve, and a method for manufacturing ferrule member which realizes alignment of multicore optical fibers corresponding to the connection by mounting a ferrule on a multicore fiber and then cutting a ferrule member instead of aligning core positions by rotating an axis of an optical fiber and adjusting positions of cores to the ferrule, leading to simplification of a rotational alignment step.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: October 18, 2022
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Masaaki Takaya, Yoshiteru Abe, Ryo Koyama, Chisato Fukai, Kazunori Katayama, Kazuhide Nakajima, Yusuke Yamada
  • Patent number: 11454757
    Abstract: A planar waveguide having M×N number of cores and to which M number of fibers having N number of cores are connected. In the planar waveguide, in a connecting end surface of the planar waveguide to which the fibers are connected, P number of fibers having Q number of cores are connected, M×N is equal to P×Q, the planar waveguide includes a plurality of the cores arranged in a horizontal direction at the same height position in the planar waveguide, and a laminated structure having the cores at different positions in a height direction, so as to be aligned with the cores of the fibers connected to the connecting end surface, and the positions of the M×N number of cores are constant in the height direction, and change only in the horizontal direction.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: September 27, 2022
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Taiji Sakamoto, Yoshiteru Abe, Kazuhide Nakajima
  • Publication number: 20220128764
    Abstract: A fiber cutter includes: a gripping member that grips an optical fiber; a blade that forms an initial cut in the optical fiber gripped by the gripping member; and a bending part that applies a predetermined bending stress to the optical fiber when the blade forms the initial cut in the optical fiber.
    Type: Application
    Filed: March 3, 2020
    Publication date: April 28, 2022
    Applicants: FUJIKURA LTD., NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takaharu Matsuda, Guan Huang, Ryo Koyama, Masaaki Takaya, Yoshiteru Abe, Chisato Fukai
  • Publication number: 20220113484
    Abstract: To provide a connector plug that makes it possible to facilitate a plurality of persons' confirmation of a connector plug before its removal or after its insertion and to prevent erroneous work. The connector plug according to the present invention has a discoloration member mounted on a gripping portion for pinching during work. The color of the discoloration member changes due to heat of a worker's fingertips when the worker pinches the connector plug or pressure when the worker pinches the connector plug. The discoloration member is discolored by one worker pinching the connector plug. Another worker looks at the discolored discoloration member, and then is able to confirm whether the connector plug is a work target.
    Type: Application
    Filed: October 9, 2019
    Publication date: April 14, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masaaki TAKAYA, Yoshiteru ABE, Ryo KOYAMA, Chisato FUKAI, Kazunori KATAYAMA
  • Publication number: 20210389528
    Abstract: An object is to provide an optical fiber connector ferrule, a sleeve, and a method for manufacturing a ferrule member that can avoid an increase in manufacturing time and an increase in cost of optical connectors for connecting multicore optical fibers. The present invention provides an optical fiber connector ferrule, a sleeve, and a method for manufacturing ferrule member which realizes alignment of multicore optical fibers corresponding to the connection by mounting a ferrule on a multicore fiber and then cutting a ferrule member instead of aligning core positions by rotating an axis of an optical fiber and adjusting positions of cores to the ferrule, leading to simplification of a rotational alignment step.
    Type: Application
    Filed: September 11, 2019
    Publication date: December 16, 2021
    Inventors: Masaaki Takaya, Yoshiteru Abe, Ryo Koyama, Chisato Fukai, Kazunori Katayama, Kazuhide Nakajima, Yusuke Yamada
  • Publication number: 20210341684
    Abstract: An object is to provide an optical connector cleaning tool capable of cleaning both an end face and a side face of a ferrule of an optical connector plug simultaneously and simply and a method of cleaning an optical connector in such a manner. An optical connector cleaning tool according to the present invention includes superimposing a plurality of cleaning sheets on each other, the cleaning sheets each including a plurality of cleaning strings arranged so as to be parallel to each other in a sheet shape, such that orientations of the cleaning strings included in the respective cleaning sheets differ from each other, pressing an end face of a ferrule of an optical connector plug against the cleaning sheets to clean the end face of the ferrule, and subsequently, sticking the ferrule through the cleaning sheets to clean a side face of the ferrule.
    Type: Application
    Filed: September 25, 2019
    Publication date: November 4, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Chisato FUKAI, Masaaki TAKAYA, Yoshiteru ABE, Ryo KOYAMA
  • Publication number: 20210341687
    Abstract: An object is to provide a multifiber optical connector and an optical cable connection method capable of reducing a connection time and reducing an installation space of a connection portion. The multifiber optical connector according to the present invention includes three position adjustment units, and performs rough alignment to fine alignment of optical fiber end faces by using sequentially these position adjustment units when optical cables are connected. The multifiber optical connector simultaneously connects the end faces of the plurality of optical fibers included in the optical cables, and thus, an extra optical fiber tape is not present, and a closure needed in the related art is not necessary.
    Type: Application
    Filed: October 9, 2019
    Publication date: November 4, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masaaki TAKAYA, Kazunori KATAYAMA, Yoshiteru ABE, Ryo KOYAMA, Chisato FUKAI, Yusuke YAMADA
  • Publication number: 20210263213
    Abstract: A planar waveguide having M×N number of cores and to which M number of fibers having N number of cores are connected. In the planar waveguide, in a connecting end surface of the planar waveguide to which the fibers are connected, P number of fibers having Q number of cores are connected, M×N is equal to P×Q, the planar waveguide includes a plurality of the cores arranged in a horizontal direction at the same height position in the planar waveguide, and a laminated structure having the cores at different positions in a height direction, so as to be aligned with the cores of the fibers connected to the connecting end surface, and the positions of the M×N number of cores are constant in the height direction, and change only in the horizontal direction.
    Type: Application
    Filed: July 11, 2019
    Publication date: August 26, 2021
    Inventors: Taiji Sakamoto, Yoshiteru Abe, Kazuhide Nakajima
  • Patent number: 8226302
    Abstract: An optical connector (10) of the present invention includes housing position correction means for correcting displacement of relative positions between plug and jack housings (13, 16); housing connection means (20, 22) which engage with each other to connect the plug and jack housings (13, 16) to each other so that a coupling state between first and second optical fibers (11, 14) can be maintained; connection release means (26, 27) capable of releasing the connected state by the housing connection means (20, 22); and frame position correction means for correcting displacement of relative positions between a frame (21) of an optical plug (12) and a connection block (34) of an optical jack (15).
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: July 24, 2012
    Assignees: Nippon Telegraph and Telephone Corporation, Japan Aviation Electronics Industry, Limited
    Inventors: Masaru Kobayashi, Ryo Nagase, Yoshiteru Abe, Yuichi Koreeda
  • Publication number: 20100226610
    Abstract: An optical connector (10) of the present invention includes housing position correction means for correcting displacement of relative positions between plug and jack housings (13, 16); housing connection means (20, 22) which engage with each other to connect the plug and jack housings (13, 16) to each other so that a coupling state between first and second optical fibers (11, 14) can be maintained; connection release means (26, 27) capable of releasing the connected state by the housing connection means (20, 22); and frame position correction means for correcting displacement of relative positions between a frame (21) of an optical plug (12) and a connection block (34) of an optical jack (15).
    Type: Application
    Filed: September 5, 2007
    Publication date: September 9, 2010
    Applicants: NIPPON TELEGRAPH AND TELEPHONE CORPORATION, JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Masaru Kobayashi, Ryo Nagase, Yoshiteru Abe, Yuichi Koreeda
  • Patent number: 7641397
    Abstract: The head end surface of an optical fiber (2) and the head end surface of an optical fiber (12) are butted to each other in an alignment member (22) of an adapter (21). In the butting, because one of the members clasping the optical fiber (2) is a plate (4a) that is short, the optical fiber (2) is bent and buckled between the left end of the short plate and the right end of the alignment member. Members clasping the optical fiber (12) are a long plate (14b) and a V-grooved base plate (13), and the optical fiber (12) is therefore horizontally fixed between each of right ends of the long plate and of the V-grooved base plate (13) and the left end of the alignment member. This results that the head end surface of the optical fiber (2) and the head end surface of the optical fiber (12) are in tight contact with each other, achieving excellent optical transmission between both optical fibers.
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: January 5, 2010
    Assignees: Japan Aviation Electronics Industry, Limited, Nippon Telegraph and Telephone Corporation, Hirose Electric Co., Ltd.
    Inventors: Yuichi Koreeda, Akihiro Onogawa, Yoshiteru Abe, Masaru Kobayashi, Ryou Nagase, Masahiro Tsuchida, Koichi Arishima
  • Patent number: 7397977
    Abstract: A wave transmission medium includes an input port 3-1 and an output port 3-2. A field distribution 1 and a field distribution 2 are obtained by numerical calculations. The field distribution 1 is a field distribution of the propagation light (forward propagation light) launched into the input port 3-1. The field distribution 2 is a field distribution of the phase conjugate light (reverse propagation light) resulting from reversely transmitting from the output port side an output field that is expected to be output from the output port 3-2 when an optical signal is launched into the input port 3-1. According to the field distributions 1 and 2, a spatial refractive index distribution is calculated such that the phase difference between the propagation light and reverse propagation light is eliminated at individual points (x, z) in the medium.
    Type: Grant
    Filed: December 25, 2003
    Date of Patent: July 8, 2008
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Toshikazu Hashimoto, Ikuo Ogawa, Takeshi Kitagawa, Senichi Suzuki, Masahiro Yanagisawa, Tomohiro Shibata, Masaki Koutoku, Hiroshi Takahashi, Ryou Nagase, Masaru Kobayashi, Shuichiro Asakawa, Yoshiteru Abe, Tsutomu Kitoh, Takaharu Ohyama
  • Patent number: 7295746
    Abstract: In an optical connector for use in connecting an optical fiber, a shell member has an engaging portion. An internal member holds the optical fiber and is received in the shell member to be removable in a first direction. A stopper is engaged with the engaging portion in the first direction. A spring is engaged with the internal member and the stopper and urges the internal member towards a second direction opposite to the first direction. The shell member has a release operation portion for releasing the engaging portion from the stopper.
    Type: Grant
    Filed: April 1, 2005
    Date of Patent: November 13, 2007
    Assignees: Japan Aviation Electronics Industry, Limited, Nippon Telegraph and Telephone Corporation
    Inventors: Yuichi Koreeda, Makoto Sanguu, Kiyoyuki Mutaguchi, Yoshiteru Abe, Masaru Kobayashi, Ryou Nagase
  • Patent number: 7261471
    Abstract: There is provided an optical connector device which prevents leakage of light until right before connectors are connected to each other and is small-sized by a reduction in space for housing shutters. The optical connector device is an optical connector device comprising a first optical connector and a second optical connector. When shutters for shutting out light from the optical connectors are collided with each other, the shutters move to positions where they do not shut out the light. Therefore, the first optical connector and the second optical connector are connected to each other. After moving, the shutter of the first optical connector and the shutter of the second optical connector are inserted into the second optical connector while remaining contacting each other.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: August 28, 2007
    Assignees: Hirose Electric Co., Ltd., Nippon Telegraph and Telephone Corporation, NTT Electronics Corporation, Japan Aviation Electronics Industry Limited
    Inventors: Masahiro Tsuchida, Yoshiteru Abe, Masaru Kobayashi, Ryo Nagase, Koichi Arishima, Yuichi Koreeda, Akihiro Onogawa
  • Patent number: 7241057
    Abstract: An optical connector apparatus includes a first and a second optical connector which are optically connectable to each other. The first optical connector includes a first connector body, a first light shielding device fitted to the first connector body in a first fitting direction, and a first guide portion coupled to the first light shielding device to guide fitting of the first light shielding device to the first connector body. The first guide portion has a first dimension in the first fitting direction. The second optical connector includes a second connector body, a second light shielding device fitted to the second connector body in a second fitting direction, and a second guide portion coupled to the second light shielding device to guide fitting of the second light shielding device to the second connector body. The second guide portion has a second dimension in the second fitting direction. In the optical connector, the second dimension is determined greater than the first dimension.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: July 10, 2007
    Assignees: Japan Aviation Electronics Industry, Limited, Nippon Telegraph and Telephone Corporation
    Inventors: Yuichi Koreeda, Yoshiteru Abe, Masaru Kobayashi, Ryou Nagase
  • Publication number: 20060280409
    Abstract: The head end surface of an optical fiber (2) and the head end surface of an optical fiber (12) are butted to each other in an alignment member (22) of an adapter (21). In the butting, because one of the members clasping the optical fiber (2) is a plate (4a) that is short, the optical fiber (2) is bent and buckled between the left end of the short plate and the right end of the alignment member. Members clasping the optical fiber (12) are a long plate (14b) and a V-grooved base plate (13), and the optical fiber (12) is therefore horizontally fixed between each of right ends of the long plate and of the V-grooved base plate (13) and the left end of the alignment member. This results that the head end surface of the optical fiber (2) and the head end surface of the optical fiber (12) are in tight contact with each other, achieving excellent optical transmission between both optical fibers.
    Type: Application
    Filed: August 31, 2004
    Publication date: December 14, 2006
    Inventors: Yuichi Koreeda, Akihiro Onogawa, Yoshiteru Abe, Masaru Kobayashi, Ryou Nagase, Masahiro Tsuchida, Koichi Arishima
  • Patent number: 7149401
    Abstract: A disassembling tool includes a holding block having a housing portion for accommodating a plug connector, a slide block, and a handling part for sliding the slide block. The plug connector comprises an outer member and a plug frame and is accommodated in the housing portion of the holding block. When turning a handle of the handling part, the slide block is slidably moved so that projections provided on the slide block release the locking between locking portions of the outer member and locked portions of the plug frame. Following this, contact portions provided on the slide block come into contact with the plug frame so as to push it out of the outer member by a given amount.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: December 12, 2006
    Assignees: Japan Aviation Electronics Industry, Limited, Nippon Telegraph and Telephone Corporation
    Inventors: Yuichi Koreeda, Makoto Sanguu, Kiyoyuki Mutaguchi, Yoshiteru Abe, Masaru Kobayashi, Ryou Nagase
  • Publication number: 20060210224
    Abstract: An optical connector apparatus includes a first and a second optical connector which are optically connectable to each other. The first optical connector includes a first connector body, a first light shielding device fitted to the first connector body in a first fitting direction, and a first guide portion coupled to the first light shielding device to guide fitting of the first light shielding device to the first connector body. The first guide portion has a first dimension in the first fitting direction. The second optical connector includes a second connector body, a second light shielding device fitted to the second connector body in a second fitting direction, and a second guide portion coupled to the second light shielding device to guide fitting of the second light shielding device to the second connector body. The second guide portion has a second dimension in the second fitting direction. In the optical connector, the second dimension is determined greater than the first dimension.
    Type: Application
    Filed: March 1, 2006
    Publication date: September 21, 2006
    Inventors: Yuichi Koreeda, Yoshiteru Abe, Masaru Kobayashi, Ryou Nagase
  • Publication number: 20060147156
    Abstract: There is provided an optical connector device which prevents leakage of light until right before connectors are connected to each other and is small-sized by a reduction in space for housing shutters. The optical connector device is an optical connector device comprising a first optical connector and a second optical connector. When shutters for shutting out light from the optical connectors are collided with each other, the shutters move to positions where they do not shut out the light. Therefore, the first optical connector and the second optical connector are connected to each other. After moving, the shutter of the first optical connector and the shutter of the second optical connector are inserted into the second optical connector while remaining contacting each other.
    Type: Application
    Filed: March 1, 2006
    Publication date: July 6, 2006
    Applicants: Hirose Electric Co., Ltd., Nippon Telegraph and Telephone Corporation, NTT Electronics Corporation, Japan Aviation Electronics Industry, Limited
    Inventors: Masahiro Tsuchida, Yoshiteru Abe, Masaru Kobayashi, Ryo Nagase, Koichi Arishima, Yuichi Koreeda, Akihiro Onogawa