Patents by Inventor Daizo Nishioka

Daizo Nishioka 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).

  • Publication number: 20210080652
    Abstract: An optical fiber cleaver includes: a body unit on which an optical fiber extending in a first direction is loaded; a lid unit connected to the body unit to be rotatable and openable; a pair of retainers arranged to be separate from each other in the first direction and retain the optical fiber between the pair of retainers when the lid unit is closed with respect to the body unit; a blade member that comes into contact with the optical fiber from one direction side of a second direction intersecting the first direction between the pair of retainers and hurt the optical fiber; and a movement unit that brings the blade member into contact with the optical fiber from the one direction side of the second direction and move the blade member to one direction side of a third direction intersecting the first direction and the second direction.
    Type: Application
    Filed: December 11, 2018
    Publication date: March 18, 2021
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., JAPAN COMMUNICATION ACCESSORIES MANUFACTURING CO., LTD.
    Inventors: Motoyoshi KIMURA, Daizo NISHIOKA, Yusuke TAKAI, Kazuyuki MIWA, Tsuyoshi IMAIZUMI
  • Patent number: 10866365
    Abstract: An optical connector includes: a ferrule; a mechanical splice mechanically connecting an optical fiber to a shorter fiber; an optical fiber holder fixing the optical fiber in position; a joint member connecting the mechanical splice to the optical fiber holder; a housing accommodating the ferrule and the mechanical splice therein; a rear body accommodating at least a part of the optical fiber holder; and a coil spring urging the mechanical splice toward the front. The joint member is arranged in at least one of the housing and the rear body. The rear body has a guide wall to guide the optical fiber into the mechanical splice, and the guide wall is arranged between the mechanical splice and the optical fiber holder and has a tapered inner wall surface expanding from the mechanical splice toward the fiber holder.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: December 15, 2020
    Assignees: JAPAN COMMUNICATION ACCESSORIES MANUFACTURING CO., LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Mitsumasa Seita, Daizo Nishioka
  • Publication number: 20200341214
    Abstract: A connector extracting jig according to an embodiment is a connector extracting jig for extracting an optical connector connected to a component to be connected along a connection direction from the component to be connected, the optical connector including a latch engaged with the component to be connected, the latch having a protrusion which is can be pushed down, and the protrusion releasing the engagement of the latch with the component to be connected when being pushed down, the connector extracting jig including: a butting part configured to butt on the optical connector in the connection direction; and a pushing-down part configured to be positioned closer to the component to be connected than the butting part and face the protrusion along a first direction intersecting the connection direction when the butting part butts on the optical connector.
    Type: Application
    Filed: April 25, 2019
    Publication date: October 29, 2020
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Daizo NISHIOKA, Yohei AOSHIMA
  • Publication number: 20200192048
    Abstract: An inner component used for a fan-out cord includes a first fixing portion that fixes a reinforcing tube that accommodates a plurality of optical fibers and a tension fiber, at least one second fixing portion that fixes a plurality of reinforcing tubes each of which accommodates at least one of the plurality of optical fibers, and an accommodation portion that accommodates the plurality of optical fibers exposed from the reinforcing tubes between the first fixing portion and the at least one second fixing portion.
    Type: Application
    Filed: December 16, 2019
    Publication date: June 18, 2020
    Applicant: SEI Optifrontier Co., Ltd.
    Inventors: Yohei AOSHIMA, Daizo NISHIOKA, Yoshikyo TAMEKUNI
  • Patent number: 10663664
    Abstract: A coating removal tool includes a base part and a cover part, to remove a coating of an optical fiber by overlapping the cover part and the base part. The base part and the cover part are made of resin, and include at least a pair of coating removal blades including a base front blade portion provided on the base part and a cover front blade portion provided on the cover part. The base part includes a V-groove which sandwiches the optical fiber in either one or both of a front and rear of the optical fiber in the longitudinal direction and the cover part includes a V-groove which sandwiches the optical fiber and is provided on a side where the V-groove exists in the front and rear of the longitudinal direction in a state where the cover part and the base part are overlapped.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: May 26, 2020
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Daizo Nishioka, Motoyoshi Kimura, Yusuke Takai
  • Publication number: 20200003963
    Abstract: A fiber optic connector with a rotatable housing integrated with a connection member for converting the connector from a first polarity to a second polarity, and a manipulator assembly comprising the rotatable housing and a locking member movable between a locked position and an unlocked position, the manipulator assembly being coupled to the connection member such that the manipulator assembly and the connection member rotate conjointly about the axis of rotation, and when in locked position connector polarity cannot be changed.
    Type: Application
    Filed: June 28, 2019
    Publication date: January 2, 2020
    Inventors: Kenji IIZUMI, Kazuyoshi TAKANO, Yohei AOSHIMA, Daizo NISHIOKA, Man Ming HO
  • Publication number: 20190384011
    Abstract: An optical connector includes: a ferrule; a mechanical splice mechanically connecting an optical fiber to a shorter fiber; an optical fiber holder fixing the optical fiber in position; a joint member connecting the mechanical splice to the optical fiber holder; a housing accommodating the ferrule and the mechanical splice therein; a rear body accommodating at least a part of the optical fiber holder; and a coil spring urging the mechanical splice toward the front. The joint member is arranged in at least one of the housing and the rear body. The rear body has a guide wall to guide the optical fiber into the mechanical splice, and the guide wall is arranged between the mechanical splice and the optical fiber holder and has a tapered inner wall surface expanding from the mechanical splice toward the fiber holder.
    Type: Application
    Filed: December 21, 2017
    Publication date: December 19, 2019
    Applicants: Japan Communication Accessories Manufacturing Co., Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Mitsumasa SEITA, Daizo NISHIOKA
  • Publication number: 20190187377
    Abstract: A coating removal tool includes a base part and a cover part, to remove a coating of an optical fiber by overlapping the cover part and the base part. The base part and the cover part are made of resin, and include at least a pair of coating removal blades including a base front blade portion provided on the base part and a cover front blade portion provided on the cover part. The base part includes a V-groove which sandwiches the optical fiber in either one or both of a front and rear of the optical fiber in the longitudinal direction and the cover part includes a V-groove which sandwiches the optical fiber and is provided on a side where the V-groove exists in the front and rear of the longitudinal direction in a state where the cover part and the base part are overlapped.
    Type: Application
    Filed: July 27, 2017
    Publication date: June 20, 2019
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Daizo NISHIOKA, Motoyoshi KIMURA, Yusuke TAKAI
  • Patent number: 9075204
    Abstract: There is provided an optical connector construction tool, which is constructed as a single component, and is compact in size and simple, wherein the construction tool allows an operation of withdrawing a wedge to be more reliably performed, and a manufacturing costs to be reduced. The optical connector construction tool comprises a base plate, a wedge provided to a bottom surface of the base plate and inserted into a mechanical splice part of an optical connector, a pair of arms extending from both sides of the base plate, and protrusions projecting from the arms toward the base plate, the protrusions engaging with the bottom of the base plate and deflecting the base plate upward as a result of the arms being laterally brought together.
    Type: Grant
    Filed: August 3, 2009
    Date of Patent: July 7, 2015
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Daizo Nishioka, Yukihiro Yokomachi, Yoshinobu Toda, Yoshio Ukita
  • Patent number: 8763246
    Abstract: Provided is an optical fiber connection method for using an optical fiber connector which includes a mechanical splice designed to connect a first optical fiber having a coating diameter D to mechanically connect two optical fibers that include a second optical fiber having a coating diameter d smaller than the coating diameter D. This method includes a first step of inserting the second optical fiber into a tube (30) to obtain a tubed optical fiber (31); a second step of fixing the tubed optical fiber (31) in a fiber holder (15); a third step of inserting the tubed optical fiber (31) into the mechanical splice (2) and placing distal ends of the two optical fibers including the tubed optical fiber (31) end to end; and a fourth step of fixing the tubed optical fiber (31) in the mechanical splice (2) in a state in which the distal ends of the two optical fibers are placed end to end.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: July 1, 2014
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Daizo Nishioka, Yukihiro Yokomachi
  • Publication number: 20130266279
    Abstract: In an optical connector of the invention, the rotation in a conventional angle polish connector can be prevented, while external force acting on the connector can be prevented from affecting a ferrule. The optical connector includes a ferrule 15, which has an angle-polished front portion and is accommodated in a housing 19 in a state where pressing force is applied in a coupling-forward direction by an elastic means so as to enable the ferrule 15 to move in the axial direction. A key groove 21 and a key 23 which are provided between the housing 19 and the ferrule 15 are engaged so as to make their relative movement possible in the movement direction. The clearance C between the groove width W of the key groove 21 and the key 23 increases along the direction in which the ferrule 15 retreats.
    Type: Application
    Filed: June 17, 2011
    Publication date: October 10, 2013
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Daizo Nishioka, Shinji Ogawa, Yukihiro Yokomachi
  • Patent number: 8478100
    Abstract: An optical cable gripping member which prevents the kinds of splicing devices from being diversified, thereby enabling reduction of the labor of component management and lowering of the production cost to be realized is obtained. In a cable gripping member 5 which is to be attached to a splicing device 1 to hold an optical fiber cable 121 from its outer sheath, a spacer 17 which fills a gap between one inner wall surface 15a of a tubular space 15 through which the optical fiber cable 121 is to be passed, and the spacer 17 in the tubular space 15 is formed monolithically with one end of the one inner wall surface 15a in a manner that the spacer 17 is attachable to and detachable from the one inner wall surface 15a. The spacer 17 is attached to or detached from the one inner wall surface 15a, thereby enabling a plurality of optical fiber cables of different sizes to be held.
    Type: Grant
    Filed: October 15, 2009
    Date of Patent: July 2, 2013
    Assignees: Sumitomo Electric Industries, Ltd., Nippon Telegraph and Telephone Corporation
    Inventors: Yoshinobu Toda, Daizo Nishioka, Takayasu Yamauchi, Yukihiro Yokomachi, Kenichiro Ohtsuka, Keiichiro Sugimoto, Shinichi Niwa
  • Patent number: 8401356
    Abstract: An optical connector assembling jig and an optical connector assembling method includes an optical connection. The optical connector assembling jig includes a base and a guide. The base is provided in a longitudinal direction with an accommodation groove for accommodating an optical fiber, and a rear pressing member for restraining a rear part of the optical fiber accommodated in the accommodation groove. The rear part is set apart from an embedded fiber. The guide has a front holding portion for holding a front part of the optical fiber accommodated in the accommodation groove. The front part is near the embedded fiber, and the guide is capable of moving in the longitudinal direction. Moving the base toward the optical connector causes the intermediate section of the optical fiber to separate from the accommodation groove and bend. By moving the base further toward the optical connector, a buffered fiber in the optical fiber can be connected to the embedded fiber.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: March 19, 2013
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Daizo Nishioka, Takayasu Yamauchi, Yukihiro Yokomachi, Yoshinobu Toda, Yoshio Ukita
  • Patent number: 8297850
    Abstract: An optical connector according to an embodiment of the present invention comprises (a) a ferrule incorporating a short fiber; (b) a mechanical splice having a holding part and a fixing part, and adapted so that the fixing part mechanically fixes the short fiber extending from the ferrule held by the holding part, and an optical fiber in an optical cable to butt the short fiber; (c) an outer housing having a housing part in which the mechanical splice is located, and a pair of flexible arms located on both sides of the housing part, the pair of arms each being provided with a locking claw at a tip; and (d) a jacket fixture for fixing a cable jacket, the jacket fixture being coupled to the mechanical splice so that the cable jacket is inserted therein.
    Type: Grant
    Filed: August 19, 2005
    Date of Patent: October 30, 2012
    Assignees: Sumitomo Electric Industries, Ltd., Nippon Telegraph and Telephone Corporation
    Inventors: Daizo Nishioka, Kenichiro Ohtsuka, Kazuhito Saito, Yoshikyo Tamekuni, Yukihiro Yokomachi, Tunetaka Ema, Kenichi Nakazawa, Yasuhiko Hoshino
  • Publication number: 20120195557
    Abstract: Provided is a connected optical fiber that is stable and has minimal connection loss even in a high-temperature or low-temperature environment, without involving an excessive amount of labor in the optical fiber connection process, and also provided is a method for assembling a connected optical fiber. The connected optical fiber includes a first optical fiber, a second optical fiber, and a mechanical splice, an end face of the first optical fiber and an end face of the second optical fiber being placed end to end and mechanically connected in the mechanical splice. In this connected optical fiber, at least one end face among the end face of the first optical fiber and the end face of the second optical fiber is formed having a convex curved surface shape in a direction angled with respect to a surface perpendicular to an axis of the optical fiber that has the end face.
    Type: Application
    Filed: June 25, 2010
    Publication date: August 2, 2012
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Daizo Nishioka, Takayasu Yamauchi, Tsuyoshi Imaizumi, Hiroya Minamitsubo
  • Publication number: 20120174395
    Abstract: Provided is an optical fiber connection method for using an optical fiber connector which includes a mechanical splice designed to connect a first optical fiber having a coating diameter D to mechanically connect two optical fibers that include a second optical fiber having a coating diameter d smaller than the coating diameter D. This method includes a first step of inserting the second optical fiber into a tube (30) to obtain a tubed optical fiber (31); a second step of fixing the tubed optical fiber (31) in a fiber holder (15); a third step of inserting the tubed optical fiber (31) into the mechanical splice (2) and placing distal ends of the two optical fibers including the tubed optical fiber (31) end to end; and a fourth step of fixing the tubed optical fiber (31) in the mechanical splice (2) in a state in which the distal ends of the two optical fibers are placed end to end.
    Type: Application
    Filed: September 17, 2010
    Publication date: July 12, 2012
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Daizo Nishioka, Yukihiro Yokomachi
  • Publication number: 20120128312
    Abstract: An optical cable gripping member which prevents the kinds of splicing devices from being diversified, thereby enabling reduction of the labor of component management and lowering of the production cost to be realized is obtained. In a cable gripping member 5 which is to be attached to a splicing device 1 to hold an optical fiber cable 121 from its outer sheath, a spacer 17 which fills a gap between one inner wall surface 15a of a tubular space 15 through which the optical fiber cable 121 is to be passed, and the optical fiber cable 121 in the tubular space 15 is formed monolithically with one end of the one inner wall surface 15a in a manner that the spacer 17 is attachable to and detachable from the one inner wall surface 15a. The spacer 17 is attached to or detached from the one inner wall surface 15a, thereby enabling a plurality of optical fiber cables of different sizes to be held.
    Type: Application
    Filed: October 15, 2009
    Publication date: May 24, 2012
    Applicants: Nippon Telegraph and Telephone Corporation, Sumitomo Electric Industries, Ltd.
    Inventors: Yoshinobu Toda, Daizo Nishioka, Takayasu Yamauchi, Yukihiro Yokomachi, Kenichiro Ohtsuka, Keiichiro Sugimoto, Shinichi Niwa
  • Publication number: 20110119904
    Abstract: There is provided an optical connector construction tool, which is constructed as a single component, and is compact in size and simple, wherein the construction tool allows an operation of withdrawing a wedge to be more reliably performed, and a manufacturing costs to be reduced. The optical connector construction tool comprises a base plate, a wedge provided to a bottom surface of the base plate and inserted into a mechanical splice part of an optical connector, a pair of arms extending from both sides of the base plate, and protrusions projecting from the arms toward the base plate, the protrusions engaging with the bottom of the base plate and deflecting the base plate upward as a result of the arms being laterally brought together.
    Type: Application
    Filed: August 3, 2009
    Publication date: May 26, 2011
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Daizo Nishioka, Yukihiro Yokomachi, Yoshinobu Toda, Yoshio Ukita
  • Publication number: 20110116745
    Abstract: An optical connector according to an embodiment of the present invention comprises (a) a ferrule incorporating a short fiber; (b) a mechanical splice having a holding part and a fixing part, and adapted so that the fixing part mechanically fixes the short fiber extending from the ferrule held by the holding part, and an optical fiber in an optical cable to butt the short fiber; (c) an outer housing having a housing part in which the mechanical splice is located, and a pair of flexible arms located on both sides of the housing part, the pair of arms each being provided with a locking claw at a tip; and (d) a jacket fixture for fixing a cable jacket, the jacket fixture being coupled to the mechanical splice so that the cable jacket is inserted therein.
    Type: Application
    Filed: January 24, 2011
    Publication date: May 19, 2011
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Daizo NISHIOKA, Kenichiro Ohtsuka, Kazuhito Saito, Yoshikyo Tamekuni, Yukihiro Yokomachi, Tunetaka Ema, Kenichi Nakazawa, Yasuhiko Hoshino
  • Publication number: 20110056246
    Abstract: An optical connector assembling jig and an optical connector assembling method includes an optical connection. The optical connector assembling jig includes a base and a guide. The base is provided in a longitudinal direction with an accommodation groove for accommodating an optical fiber, and a rear pressing member for restraining a rear part of the optical fiber accommodated in the accommodation groove. The rear part is set apart from an embedded fiber. The guide has a front holding portion for holding a front part of the optical fiber accommodated in the accommodation groove. The front part is near the embedded fiber, and the guide is capable of moving in the longitudinal direction. Moving the base toward the optical connector causes the intermediate section of the optical fiber to separate from the accommodation groove and bend. By moving the base further toward the optical connector, a buffered fiber in the optical fiber can be connected to the embedded fiber.
    Type: Application
    Filed: April 30, 2009
    Publication date: March 10, 2011
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Daizo Nishioka, Takayasu Yamauchi, Yukihiro Yokomachi, Yoshinobu Toda, Yoshio Ukita