Patents by Inventor Yukihiro Yokomachi

Yukihiro Yokomachi 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: 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: 20120243832
    Abstract: The optical connector in accordance with an embodiment comprises a ferrule for holding a built-in fiber to be coupled to a coated optical fiber of an optical cord, a first housing for containing the ferrule, a second housing arranged behind the first housing, and a sheath pressing member and a securing member which are mounted to the second housing. The sheath pressing member presses a sheath of the optical cord against the second housing. The securing member secures a tension fiber of the optical cord to the second housing so as to contain the sheath pressing member.
    Type: Application
    Filed: October 6, 2010
    Publication date: September 27, 2012
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SEI Optifrontier Co., Ltd.
    Inventors: Yoshikyo Tamekuni, Yuji Suzuki, Yukihiro Yokomachi
  • Publication number: 20120243839
    Abstract: A ferrule holder is provided as one capable of improving convenience in a fusion splice between a built-in fiber and an optical fiber. The ferrule holder 1 is provided with a main body 2 and a lid 3. The main body 2 has a mount portion 4 on which a ferrule body is to be mounted, and the mount portion 4 is provided with a first mount surface 8, and a second mount surface 9 provided through a step portion 11 on the rear side of the first mount surface 8. This allows, for example, the ferrule body with a dust cap thereon to be mounted on the first mount surface 8 in the fusion splice in the case of an SC connector; it also allows the ferrule body with a dust cap thereon to be mounted on the second mount surface 9 in the fusion splice in the case of an LC connector. Therefore, there is no need for preparing a plurality of ferrule holders according to types of connectors, which can achieve improvement in convenience in the fusion splice between the built-in fiber and the optical fiber.
    Type: Application
    Filed: October 27, 2010
    Publication date: September 27, 2012
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SEI Optifrontier Co., Ltd.
    Inventors: Yoshikyo Tamekuni, Yuji Suzuki, Yukihiro Yokomachi
  • 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: 20110265521
    Abstract: An optical connector assembling method capable of preventing workability from worsening is provided. First, when assembling the optical connector, an optical cord (2) is passed through a rear housing (8), an outer jacket holding member (9), a securing member (10), and a boot (11), and an outer jacket (4) is removed from a leading end portion of the optical cord (2), so as to expose a coated optical fiber (3) and a tension-resistant fiber (5). A handled dust cap (16A) is mounted to a ferrule member (6) holding a built-in fiber. Then, a fusion splicer fusion-splices the built-in fiber and the coated optical fiber (3) to each other. Thereafter, while the ferrule member (6) keeps the handled dust cap (16A) mounted thereto, a plug housing (7) is assembled to the rear housing (8). Then, the outer jacket holding member (9) and securing member (10) secure the outer jacket (4) and tension-resistant fiber (5) to the rear housing (8), and the boot (11) is mounted to the securing member (10).
    Type: Application
    Filed: October 27, 2010
    Publication date: November 3, 2011
    Inventors: Yoshikyo Tamekuni, Yuji Suzuki, Yukihiro Yokomachi
  • Patent number: 8047726
    Abstract: An optical connector in which the housing property into a cabinet or the like can be enhanced because of the compactification, and which can solve problems of the increase of the bending loss of an optical fiber, the breakage, and the like is obtained. In an optical connector which houses and holds a fusion spliced portion where a short optical fiber previously fitted to an optical connector ferrule is fusion-spliced with a coated optical fiber, one end of a protection sleeve which armors the fusion spliced portion is coupled to the optical connector ferrule. As a result, the length of the protection sleeve which covers the fusion spliced portion so that the fusion spliced portion is positioned at the middle can be set with reference to an end portion of the optical connector ferrule. Therefore, the protection sleeve can be shortened, and compactification of the optical connector can be realized.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: November 1, 2011
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yoshikyo Tamekuni, Yukihiro Yokomachi, Tsutomu Watanabe, Toshihiko Honma, Masahiro Shibata
  • 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
  • Patent number: 7934874
    Abstract: A holder capable of protecting an optical connector ferrule from an external shock, or the like and executing a fusion-splice of a short optical fiber not to take out the optical connector ferrule from the holder is obtained. A holder for holding a connector plug equipped with an optical connector ferrule to which a short optical fiber is fitted and a plug frame for covering an outer periphery of the optical connector ferrule therein, wherein, when the short optical fiber together with the holder is fitted to a fusion splicing apparatus that fusion-splices the short optical fiber and other coated optical fiber, the short optical fiber extended from the plug frame is positioned in a fusion position.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: May 3, 2011
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Toshihiko Honma, Tsutomu Watanabe, Yukihiro Yokomachi, Yoshikyo Tamekuni
  • 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
  • Publication number: 20110008003
    Abstract: An optical connector, which is capable of enhancing fittability into a cabinet, or the like on account of compactification and also avoiding problems of an increase of bend loss, a breakage, etc. of an optical fiber, can be provided. In an optical connector 1 that houses a fusion-spliced portion 13, in which a short optical fiber 5 that is fitted previously to an optical connector ferrule 85 and a coated optical fiber 3 are fusion spliced together and holds the fusion-spliced portion 13 therein, one end of a protection sleeve 87 made of the thermal shrinkage material that externally fixes the fusion-spliced portion 13 is coupled to the optical connector ferrule 85. An air escape hole 7f for escaping an air, which is confined in the protection sleeve 87 when the protection sleeve 87 is thermally shrunk and adhered closely to the optical connector ferrule 85, to the outside is formed in the optical connector ferrule 85.
    Type: Application
    Filed: December 17, 2008
    Publication date: January 13, 2011
    Applicants: Sumitomo Electric Industries Ltd, SEI Optifrontier Co. Ltd
    Inventors: Yoshikyo Tamekuni, Masahiro Shibata, Yukihiro Yokomachi, Toshihiko Honma, Tsutomu Watanabe
  • Publication number: 20100284653
    Abstract: An optical connector in which the housing property into a cabinet or the like can be enhanced because of the compacification, and which can solve problems of the increase of the bending loss of an optical fiber, the breakage, and the like is obtained. In an optical connector which houses and holds a fusion spliced portion where a short optical fiber previously fitted to an optical connector ferrule is fusion-spliced with a coated optical fiber, one end of a protection sleeve which armors the fusion spliced portion is coupled to the optical connector ferrule. As a result, the length of the protection sleeve which covers the fusion spliced portion so that the fusion spliced portion is positioned at the middle can be set with reference to an end portion of the optical connector ferrule. Therefore, the protection sleeve can be shortened, and compactification of the optical connector can be realized.
    Type: Application
    Filed: November 13, 2007
    Publication date: November 11, 2010
    Inventors: Yoshikyo Tamekuni, Yukihiro Yokomachi, Tsutomu Watanabe, Toshihiko Honma, Masahiro Shibata
  • Patent number: 7731429
    Abstract: An optical connector has a simple structure and a method of attaching an optical fiber cord to the connector is easy. The connector 1 includes: a plug part 2 which has a capillary 5 provided at the front and containing a built-in optical fiber 6 and which includes a mechanical splicing portion 7 capable of allowing an optical fiber 51 to be inserted from the rear so as to be fixed therein; a caulking stand 35 capable of holding a sheath by radially contracting in a state in which the optical fiber cord 50 is inserted therein; a caulking ring 45 provided outside the cylindrical portion 36 of the stand 35 so as to hold the tension member 52 between the ring 45 and the stand 35; and a coupling body 20 provided behind the plug part 2 and accommodating the stand 35 and the ring 45.
    Type: Grant
    Filed: April 9, 2007
    Date of Patent: June 8, 2010
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kenichiro Ohtsuka, Daizo Nishioka, Yukihiro Yokomachi, Kenichi Suzuki, Takayasu Yamauchi, Katsuyuki Aihara, Keisuke Okada
  • Publication number: 20090252460
    Abstract: An optical connector has a simple structure and a method of attaching an optical fiber cord to the connector is easy. The connector 1 includes: a plug part 2 which has a capillary 5 provided at the front and containing a built-in optical fiber 6 and which includes a mechanical splicing portion 7 capable of allowing an optical fiber 51 to be inserted from the rear so as to be fixed therein; a calking stand 35 capable of holding a sheath by radially contracting in a state in which the optical fiber cord 50 is inserted therein; a calking ring 45 provided outside the cylindrical portion 36 of the stand 35 so as to hold the tension member 52 between the ring 45 and the stand 35; and a coupling body 20 provided behind the plug part 2 and accommodating the stand 35 and the ring 45.
    Type: Application
    Filed: April 9, 2007
    Publication date: October 8, 2009
    Inventors: Kenichiro Ohtsuka, Daizo Nishioka, Yukihiro Yokomachi, Kenichi Suzuki, Takayasu Yamauchi, Katsuyuki Aihara, Keisuke Okada
  • Publication number: 20090238523
    Abstract: A holder capable of protecting an optical connector ferrule from an external shock, or the like and executing a fusion-splice of a short optical fiber not to take out the optical connector ferrule from the holder is obtained. A holder for holding a connector plug equipped with an optical connector ferrule to which a short optical fiber is fitted and a plug frame for covering an outer periphery of the optical connector ferrule therein, wherein, when the short optical fiber together with the holder is fitted to a fusion splicing apparatus that fusion-splices the short optical fiber and other coated optical fiber, the short optical fiber extended from the plug frame is positioned in a fusion position.
    Type: Application
    Filed: November 13, 2007
    Publication date: September 24, 2009
    Inventors: Toshihiko Honma, Tsutomu Watanabe, Yukihiro Yokomachi, Yoshikyo Tamekuni
  • Publication number: 20080107381
    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: September 19, 2005
    Publication date: May 8, 2008
    Inventors: Daizo Nishioka, Kenichiro Ohtsuka, Kazuhito Saito, Yoshikyo Tamekuni, Yukihiro Yokomachi, Tunetaka Ema, Kenichi Nakazawa, Yasuhiko Hoshino
  • Patent number: D556688
    Type: Grant
    Filed: November 28, 2005
    Date of Patent: December 4, 2007
    Assignees: Matsushita Electric Works, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Yoshihiro Shogaki, Yukihiro Yokomachi, Kenichiro Ohtsuka, Daizo Nishioka
  • Patent number: D571301
    Type: Grant
    Filed: November 28, 2005
    Date of Patent: June 17, 2008
    Assignees: Matsushita Electric Works, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Yoshiyuki Nakashima, Yukihiro Yokomachi, Kenichiro Ohtsuka, Daizo Nishioka
  • Patent number: D573949
    Type: Grant
    Filed: August 24, 2005
    Date of Patent: July 29, 2008
    Assignees: Seikoh Giken Co., Ltd., Matsushita Electric Works Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Junji Taira, Yoshihiro Shogaki, Yukihiro Yokomachi