Patents by Inventor Etsuji Sugita
Etsuji Sugita 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: 6896417Abstract: In the production of a hollow cast article having a slit, the release of a hollow cast product from a mold is carried out while opening the hollow cast product. In one embodiment, a core provided with recessed parts (or projected parts) formed in a slit forming part (or an outer peripheral part) is used and the drawing out of the core from the hollow cast product is carried out while opening the hollow cast product by means of the recessed parts (or projected parts) mentioned above. By such a method, a hollow cast article having a slit and projected parts (or recessed parts) formed in a slit part or/and an inner peripheral part thereof is obtained.Type: GrantFiled: October 8, 2002Date of Patent: May 24, 2005Assignee: YKK CorporationInventors: Masayuki Kobayashi, Hideki Takeda, Etsuji Sugita
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Publication number: 20040258363Abstract: The object of the present invention is to provide a highly reliable optical fixed attenuator and the manufacturing process thereof being free of the conventional cumbersome processes including the process for inserting the optical fiber into the ferrule and fixing thereto. In the present invention, the surface of an optical fiber is metalized to serve as an electrode of the electroforming process so that a metal layer to serve as the ferrule 11 is directly formed over the outside surface of the optical fiber 10, and, as a result, a long ferrule, wherein the optical fiber 10 and the metal layer are fully integrated, is made available, whereby an optical device to constitute the desired optical fixed attenuator can be obtained by simply cutting such a long ferrule to any desired length.Type: ApplicationFiled: June 17, 2004Publication date: December 23, 2004Applicant: SMK CORPORATIONInventors: Masayoshi Shigihara, Mitsuhiro Yoshida, Etsuji Sugita, Shuichiro Inagaki
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Patent number: 6695487Abstract: A conversion adapter to be used for connecting opposed optical connector ferrules having different diameters is formed of an amorphous alloy possessing at least a glass transition region, preferably a glass transition region of not less than 30 K in temperature width. Particularly, the amorphous alloy of M1—M2 system or M1—M2—La system (M1: Zr and/or Hf, M2: Ni, Cu, Fe, Co, Mn, Nb, Ti, V, Cr, Zn, Al, and/or Ga, La: rare earth element) possesses a wide range of &Dgr;Tx and thus can be advantageously used as a material for the conversion adapter. Such a conversion adapter can be manufactured with high mass-productivity by a mold casting method or molding method.Type: GrantFiled: June 11, 2001Date of Patent: February 24, 2004Assignee: YKK CorporationInventors: Masayuki Kobayashi, Takeshi Taniguchi, Hidenobu Nagahama, Hideki Takeda, Etsuji Sugita
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Publication number: 20030068136Abstract: In the production of a hollow cast article having a slit, the release of a hollow cast product from a mold is carried out while opening the hollow cast product. In one embodiment, a core provided with recessed parts (or projected parts) formed in a slit forming part (or an outer peripheral part) is used and the drawing out of the core from the hollow cast product is carried out while opening the hollow cast product by means of the recessed parts (or projected parts) mentioned above. By such a method, a hollow cast article having a slit and projected parts (or recessed parts) formed in a slit part or/and an inner peripheral part thereof is obtained.Type: ApplicationFiled: October 8, 2002Publication date: April 10, 2003Applicant: YKK CORPORATIONInventors: Masayuki Kobayashi, Hideki Takeda, Etsuji Sugita
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Patent number: 6466723Abstract: A cleaning tool for cleaning optical fiber connectors exposes a cleaning sheet in a window of the case. A winding pulley is operable to wind the cleaning sheet upon rotation at a constant pitch. A rotation mechanism, that is operated by a lever, rotates the winding pulley. The case is constructed of a first front plate and a second front plate which are closed off by a perimeter wall along their outer circumference. The case has an open portion in a part of the perimeter wall, and the lever is disposed in the open portion in an inclined orientation.Type: GrantFiled: March 1, 2001Date of Patent: October 15, 2002Assignee: NTT Advanced Technology CorporationInventors: Taisei Miyake, Ai Fukuhara, Juichi Noda, Etsuji Sugita, Hitoshi Goto, Isao Iwakane, Kou Niida, Yuji Takaoka
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Publication number: 20020092976Abstract: In a patch type optical fiber sensor, an optical fiber (2) has at its part a fiber Bragg grating (3) and that part is fixed to a film (4) serving as a base to form a film-like detecting element. Opposite ends of that part are connected to optical cord (1) to protect the film-like detecting element. The detecting element is bonded to an object (9) to be detected by bonding agent or by welding.Type: ApplicationFiled: February 28, 2001Publication date: July 18, 2002Inventors: Eiichi Sugai, Etsuji Sugita, Koji Yoshida
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Publication number: 20020031310Abstract: A conversion adapter to be used for connecting opposed optical connector ferrules having different diameters is formed of an amorphous alloy possessing at least a glass transition region, preferably a glass transition region of not less than 30K in temperature width. Particularly, the amorphous alloy of M1-M2 system or M1-M2-La system (M1: Zr and/or Hf, M2: Ni, Cu, Fe, Co, Mn, Nb, Ti, V, Cr, Zn, Al, and/or Ga, La: rare earth element) possesses a wide range of &Dgr;Tx and thus can be advantageously used as a material for the conversion adapter. Such a conversion adapter can be manufactured with high mass-productivity by a mold casting method or molding method.Type: ApplicationFiled: June 11, 2001Publication date: March 14, 2002Applicant: YKK Corporation and NTT Advanced Technology CorporationInventors: Masayuki Kobayashi, Takeshi Taniguchi, Hidenobu Nagahama, Hideki Takeda, Etsuji Sugita
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Publication number: 20010033728Abstract: The cleaning tool for optical fiber connectors exposes the cleaning sheet in the window for cleaning of the case. The winding pulley winds the cleaning sheet with rotating in a constant pitch. A rotation mechanism operated by lever rotates the winding pulley. In the case, a first front plate and a second front plate is closed off by a perimeter walls along their outline. The case has the opened portion opening a part of the perimeter wall, and the lever is disposed in the opened portion to be able to incline.Type: ApplicationFiled: March 1, 2001Publication date: October 25, 2001Inventors: Taisei Miyake, Ai Fukuhara, Juichi Noda, Etsuji Sugita, Hitoshi Goto, Isao Iwakane, Kou Niida, Yuji Takaoka
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Patent number: 5673346Abstract: To realize an optical fiber connector coupled or decoupled by simple insertion and removal operation without applying ferrule connecting force to other elements (package board or back panel), the optical connector comprises a first housing (33); a second housing (34); a third housing (36) slidably housed within the second housing; a first engage mechanism (37, 38) provided between the second and third housings, for engaging these two housings when the first and third housings are not coupled; a second engage mechanism (39, 40) provided between the first and third housings, for engaging these two housings when the first housing is coupled to second and third housings; a first release member (41) provided for the first housings, for releasing the first engage mechanism when the third housing is engaged to the first housing; and a second release member (42) provided for the second housing, for releasing the second engage mechanism when the second housing is coupled to the third housing or the first housing is deType: GrantFiled: August 27, 1996Date of Patent: September 30, 1997Assignee: Nippon Telegraph and Telephone CorporationInventors: Shin'ichi Iwano, Ryo Nagase, Kazunori Kanayama, Etsuji Sugita, Yasuhiro Ando
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Patent number: 5537501Abstract: To realize an optical fiber connector coupled or decoupled by simple insertion and removal operation without applying ferrule connecting force to other elements (package board or back panel), the optical connector comprises a first housing (33); a second housing (34); a third housing (36) slidably housed within the second housing; a first engage mechanism (37, 38) provided between the second and third housings, for engaging these two housings when the first and third housings are not coupled; a second engage mechanism (39, 40) provided between the first and third housings, for engaging these two housings when the first housing is coupled to second and third housings; a first release member (41) provided for the first housings, for releasing the first engage mechanism when the third housing is engaged to the first housing; and a second release member (42) provided for the second housing, for releasing the second engage mechanism when the second housing is coupled to the third housing or the first housing is deType: GrantFiled: December 21, 1994Date of Patent: July 16, 1996Assignee: Nippon Telegraph and Telephone CorporationInventors: Shiniichi Iwano, Ryo Nagase, Kazunori Kanayama, Etsuji Sugita, Yasuhiro Ando
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Patent number: 5528711Abstract: To realize an optical fiber connector coupled or decoupled by simple insertion and removal operation without applying ferrule connecting force to other elements (package board or back panel), the optical connector comprises a first housing (33); a second housing (34); a third housing (36) slidably housed within the second housing; a first engage mechanism (37, 38) provided between the second and third housings, for engaging these two housings when the first and third housings are not coupled; a second engage mechanism (39, 40) provided between the first and third housings, for engaging these two housings when the first housing is coupled to second and third housings; a first release member (41) provided for the first housings, for releasing the first engage mechanism when the third housing is engaged to the first housing; and a second release member (42) provided for the second housing, for releasing the second engage mechanism when the second housing is coupled to the third housing or the first housing is deType: GrantFiled: December 21, 1994Date of Patent: June 18, 1996Assignee: Nippon Telegraph and Telephone Corp.Inventors: Shin'ichi Iwano, Ryo Nagase, Kazunori Kanayama, Etsuji Sugita, Yasuhiro Ando
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Patent number: 5404416Abstract: To provide an optical connector which can slidably and stably support the optical connector element (ferrule) within the connector housing without increasing the axial length of the ferrule, the optical connector plug comprising: (a) a plug housing (202) formed with a shoulder portion (253) between a large hollow portion (254) and a small hollow portion (252) and formed with no projection between said two portions; (b) a plug ferrule (201) connected to an optical fiber (204) and formed with a flange portion (201b) slidably fitted into the large hollow portion of said plug housing and an end portion (201a) passed through the small hollow portion of said plug housing; and (c) a spring (203) housed within said plug housing to urge the flange portion of said plug ferrule against the shoulder portion (253) of said plug housing.Type: GrantFiled: February 24, 1993Date of Patent: April 4, 1995Assignee: Nippon Telegraph & Telephone CorporationInventors: Shinichi Iwano, Ryo Nagase, Kazunori Kanayama, Etsuji Sugita, Yasuhiro Ando
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Patent number: 5220703Abstract: To microscopically clean the ferrule end surface of an optical connector simply, uniformly and securely, the optical connector cleaner comprises a cleaning cloth woven with ultrafine fiber less than 0.1 denier; a casing formed with at least one opening for protecting the cleaning cloth from dust; and a mechanism for shifting the cleaning cloth exposed in the opening for cloth renewing, after the ferrule end surface has been rubbed with the cleaning cloth for cleaning. Further, it is preferable to provide an elastic member under the cleaning cloth for applying a constant cleaning pressure against the cloth and a guide member over the cleaning cloth for securely cleaning the ferrule end surface. The cloth shift mechanism is operated manually by the user or automatically by a motor. A holder jig holds the optical connector to facilitate cleaning of the ferrule end surface. The holder jig supports the optical connector such that the ferrule projects from the holder jig.Type: GrantFiled: March 20, 1992Date of Patent: June 22, 1993Assignee: Nippon Telegraph & Telephone Co.Inventors: Kazunori Kanayama, Etsuji Sugita, Ryo Nagase, Shinichi Iwano
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Patent number: 5121454Abstract: To realize an optical fiber connector coupled or decoupled by simple insertion and removal operation without applying ferrule connecting force to other elements (package board or back panel), the optical connector comprises a first housing (33); a second housing (34); a third housing (36) slidably housed within the second housing; a first engage mechanism (37, 38) provided between the second and third housings, for engaging these two housings when the first and third housings are not coupled; a second engage mechanism (39, 40) provided between the first and third housings, for engaging these two housings when the first housing is coupled to second and third housings; a first release member (41) provided for the first housings, for releasing the first engage mechanism when the third housing is engaged to the first housing; and a second release member (42) provided for the second housing, for releasing the second engage mechanism when the second housing is coupled to the third housing or the first housing is deType: GrantFiled: November 21, 1990Date of Patent: June 9, 1992Assignee: Nippon Telegraph and Telephone CorporationInventors: Shin'ichi Iwano, Ryo Nagase, Kazunori Kanayama, Etsuji Sugita, Yasuhiro Ando
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Patent number: 5117528Abstract: To microscopically clean the ferrule end surface of an optical connector simply, uniformly and securely, the optical connector cleaner comprises a cleaning cloth woven with ultrafine fiber less than 0.1 denier; a casing formed with at least one opening for protecting the cleaning cloth from dust; and a mechanism for shifting the cleaning cloth exposed in the opening for cloth renewing, after the ferrule end surface has been rubbed with the cleaning cloth for cleaning. Further, it is preferable to provide an elastic member under the cleaning cloth for applying a constant cleaning pressure against the cloth and a guide member over the cleaning cloth for securely cleaning the ferrule end surface. The cloth shift mechanism is operated manually by the user or automatically by a motor.Type: GrantFiled: March 15, 1990Date of Patent: June 2, 1992Assignee: Nippon Telegraph and Telephone CorporationInventors: Kazunori Kanayama, Etsuji Sugita, Ryou Nagase, Shinichi Iwano
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Patent number: 5103680Abstract: A cylindrical split alignment sleeve of ceramic material has an axial slit and is used in an optical fiber connector for connecting optical fibers to each other. In order to establish the strength reliability of the split ceramic alignment sleeve, a predetermined stress is applied to it by a test procedure ensuring no damage to the sleeve. According to the invention, a test load is applied to the inner circumferential surface of the split ceramic alignment sleeve by a loading part which includes stationary and movable members having inclined slidable contact surfaces. The sleeve is applied onto the load part and the movable member is displaced to apply load to the sleeve. The magnitude of load can be detected by deformation of the loading part or by displacement of the movable member.Type: GrantFiled: December 12, 1990Date of Patent: April 14, 1992Assignee: Nippon Telegraph and Telephone CorporationInventors: Kazunori Kanayama, Etsuji Sugita, Ryo Nagase, Shin'ichi Iwano
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Patent number: 5016970Abstract: A ferrule for optical fibers transmitting linearly polarized light capable of preventing deterioration and fluctuation of the extinction ratio. The ferrule incorporates at least two paths connecting a region in a vicinity of an end of a puncture for an optical fiber inside the flange portion with outside of the ferrule. These paths effectively enable the removal of air in such a region which could have caused an extraneous stress on the optical fiber resulting in deterioration of the extinction ratio. An optical fiber connector using this ferrule is also disclosed.Type: GrantFiled: August 10, 1989Date of Patent: May 21, 1991Assignee: Nippon Telegraph and Telephone Corp.Inventors: Ryo Nagase, Juichi Noda, Etsuji Sugita
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Patent number: 4895425Abstract: In a plug-in connector for connecting elements mounted on a backage board to other elements arranged on a back wiring board disposed perpendicular to the package board, the guide pin and the connector housing fixing screw are formed integral with each other to realize a floating connector coupling structure which is high in mounting efficiency and precision and small in size. Further, the plug-in connector can connect two different, optical and electrical connectors. Further, there is disclosed a novel optical connector plug whose radial eccentricity direction can be matched with that of a mated optical connector jack with an optical fiber aligning jig to minimize the optical fiber coupling power loss.Type: GrantFiled: February 24, 1989Date of Patent: January 23, 1990Assignee: Nippon Telegraph and Telephone CorporationInventors: Shinichi Iwano, Etsuji Sugita, Ryo Nagase, Kazunori Kanayama, Kenichi Nakano, Yasuhiro Ando