Patents by Inventor Yuichi Morishita
Yuichi Morishita 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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Publication number: 20140116190Abstract: A bicycle cable is configured to be inserted in a hollow member of a bicycle. The bicycle cable basically includes a cable body and a pair of plastic tape pieces. The plastic tape pieces are attached to the cable body such that the cable body is interposed between the plastic tape pieces with a thermal adhesive layer sealing the plastic tape pieces to together with thermal adhesion. The plastic tape pieces form a pair of longitudinal extending fins projecting outwardly on both sides of the cable main body.Type: ApplicationFiled: August 15, 2013Publication date: May 1, 2014Applicant: Shimano Inc.Inventors: Yoko SUGII, Naoya KATO, Satoru SASAKI, Takashi SAKAMOTO, Yoshihisa KOBAYASHI, Yuichi MORISHITA
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Patent number: 7574087Abstract: An optical fiber includes a clad portion and a core portion surrounded by the clad portion. Here, the clad portion is formed by substantially pure quartz, and the core portion has a higher refractive index than the clad portion. The optical fiber is characterized in that a relative refractive index difference of a center of the core portion falls within a range from 0.15% to 0.30%, and a maximum relative refractive index difference of the core portion falls within a range from 0.4% to 0.6%. Here, it is preferable that an average relative refractive index difference of the core portion falls within a range from 0.30% to 0.40%. Here, a mode field diameter of the optical fiber falls within a range from 8.6 ?m to 9.5 ?m at 1310 nm, and a cable cutoff wavelength of the optical fiber is equal to or lower than 1260 nm. Note that, after the optical fiber is subjected to hydrogen aging, a loss of the optical fiber is preferably equal to or lower than 0.4 dB/km at 1383 nm.Type: GrantFiled: April 27, 2007Date of Patent: August 11, 2009Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Dai Inoue, Hiroshi Oyamada, Yuichi Morishita
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Patent number: 7333702Abstract: Even if a fiber fuse phenomenon occurs to start fire spreading, the fire spreading is shut off. A graded index fiber (GIF) 3 is inserted between transmission-use single mode fibers (SMF) 2a, 2b on a fiber optics transmission line 1. The GIF 3 is so designed that its mode field diameter (MFD) gradually increases from a light entry side. The MFD exhibits a maximum value at a location ¼ of a pitch from the end of the GIF 3. A GIF 3a is disposed on the light entry side. A GIF 3b having an MFD gradually decreasing is disposed on the opposite side of the GIF 3a. The GIF 3b is disposed on the light exit side. The lengths of the GIF 3a and GIF 3b are ¼ of a pitch. The length of the GIF 3 formed by connecting the both is ½ of a pitch. According to the present invention, an expanded MFD is inserted in the middle of the fiber optics transmission line, it is possible to shut off fire spreading caused due to fiber fuse phenomenon.Type: GrantFiled: August 24, 2004Date of Patent: February 19, 2008Assignee: SWCC Showa Device Technology Co., Ltd.Inventors: Jin Fujita, Yuichi Morishita, Kazuaki Morita
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Publication number: 20070196062Abstract: An optical fiber includes a clad portion and a core portion surrounded by the clad portion. Here, the clad portion is formed by substantially pure quartz, and the core portion has a higher refractive index than the clad portion. The optical fiber is characterized in that a relative refractive index difference of a center of the core portion falls within a range from 0.15% to 0.30%, and a maximum relative refractive index difference of the core portion falls within a range from 0.4% to 0.6%. Here, it is preferable that an average relative refractive index difference of the core portion falls within a range from 0.30% to 0.40%. Here, a mode field diameter of the optical fiber falls within a range from 8.6 ?m to 9.5 ?m at 1310 nm, and a cable cutoff wavelength of the optical fiber is equal to or lower than 1260 nm. Note that, after the optical fiber is subjected to hydrogen aging, a loss of the optical fiber is preferably equal to or lower than 0.4 dB/km at 1383 nm.Type: ApplicationFiled: April 27, 2007Publication date: August 23, 2007Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Dai Inoue, Hiroshi Oyamada, Yuichi Morishita
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Publication number: 20070031095Abstract: Even if a fiber fuse phenomenon occurs to start fire spreading, the fire spreading is shut off. A graded index fiber (GIF) 3 is inserted between transmission-use single mode fibers (SMF) 2a, 2b on a fiber optics transmission line 1. The GIF 3 is so designed that its mode field diameter (MFD) gradually increases from a light entry side. The MFD exhibits a maximum value at a location ¼ of a pitch from the end of the GIF 3. A GIF 3a is disposed on the light entry side. A GIF 3b having an MFD gradually decreasing is disposed on the opposite side of the GIF 3a. The GIF 3b is disposed on the light exit side. The lengths of the GIF 3a and GIF 3b are ¼ of a pitch. The length of the GIF 3 formed by connecting the both is ½ of a pitch. According to the present invention, an expanded MFD is inserted in the middle of the fiber optics transmission line, it is possible to shut off fire spreading caused due to fiber fuse phenomenon.Type: ApplicationFiled: August 24, 2004Publication date: February 8, 2007Inventors: Jin Fujita, Yuichi Morishita, Kazuaki Morita
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Patent number: 7092610Abstract: In order to supply the optical fiber for attenuating optical signal enable the attenuation amount to become flat in wide wavelength scope, simultaneously adding at least two kinds of dopants for attenuating optical signal over the core and the cladding of the optical fiber. Then, properly adjusting the kind and the concentration of dopants for manufacturing the optical fiber 1 for attenuating optical signal; simultaneously adding the dopant enabling the absorption of optical signal to increase with the wavelength become long and the dopant enabling the absorption of optical signal to decrease with the wavelength become long. As the dopant, it is desired to select at least two kinds of transitional metals from Co, Ni, Cr, V, Fe, Mn, Tb and Tm. Further, as the doped area, it is desired to dope the 6 times of the center portion of the core from the center of the core.Type: GrantFiled: November 21, 2003Date of Patent: August 15, 2006Assignee: Showa Electric Wire & Cable Co. Ltd.Inventors: Masamitsu Yamaguchi, Gen Tanimoto, Kentaro Nouchi, Yuichi Morishita, Eiji Matsuyama
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Publication number: 20040114903Abstract: In order to supply the optical fiber for attenuating optical signal enable the attenuation amount to become flat in wide wavelength scope, simultaneously adding at least two kinds of dopants for attenuating optical signal over the core and the cladding of the optical fiber. Then, properly adjusting the kind and the concentration of dopants for manufacturing the optical fiber 1 for attenuating optical signal; simultaneously adding the dopant enabling the absorption of optical signal to increase with the wavelength become long and the dopant enabling the absorption of optical signal to decrease with the wavelength become long. As the dopant, it is desired to select at least two kinds of transitional metals from Co, Ni, Cr, V, Fe, Mn, Tb and Tm. Further, as the doped area, it is desired to dope the 6 times of the center portion of the core from the center of the core.Type: ApplicationFiled: November 21, 2003Publication date: June 17, 2004Inventors: Masamitsu Yamaguchi, Gen Tanimoto, Kentaro Nouchi, Yuichi Morishita, Eiji Matsuyama
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Patent number: 6269210Abstract: An optical fiber ribbon includes a plurality of optical fibers arranged in a row and an outer coating formed around the optical fibers. Each of the optical fibers has a core, a cladding, and a non-strippable thin coating made of synthetic resin with a Young's modulus of 50 kg/mm2 to 250 kg/mm2 at room temperature and coated around the cladding. The concentricity of the core to the diameter of the non-strippable thin coating is 1 &mgr;m or less.Type: GrantFiled: April 29, 1999Date of Patent: July 31, 2001Assignees: Showa Electric Wire & Cable Co., Ltd., Nippon Telegraph and Telephone Corp.Inventors: Kenji Yagi, Tomotaka Murase, Keiko Shiraishi, Ken-ichi Muta, Yuichi Morishita, Takashi Yoshida, Masaru Kobayashi, Koichi Arishima, Shin Sumida
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Patent number: 6221555Abstract: Abnormal losses outside a reflection band attributable to a mismatch of core field diameters are suppressed. A photo-sensitive fiber comprising a core 1 and a cladding having a cladding inner layer and a cladding outer layer formed in this order around the core, in which at least the core is photo-sensitive to form a grating. The core and cladding inner layer include a photo-sensitive dopant for increasing the refractive index. The core additionally includes a first non-photo-sensitive dopant for increasing the refractive index and the cladding inner layer additionally includes a second non-photo-sensitive dopant for creasing the refractive index.Type: GrantFiled: October 6, 1998Date of Patent: April 24, 2001Assignees: Showa Electric Wire & Cable Co., Ltd., Prime Optical Fiber CorporationInventors: Yuichi Murakami, Yuichi Morishita, Kenichi Muta, Jen-Hung Chu, Hen-Tai Shang
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Patent number: 5841926Abstract: Disclosed are optical fibers for optical attenuation comprising a core and a cladding, wherein the cladding comprises two or more parts different from each other in their refractive indices and/or the attenuating dopant existence. By using the optical fibers for optical attenuation of the present invention, an optical attenuator which can effectively reduce the effect of cladding mode upon coupling of optical fibers and is excellent in characteristic stability can be manufactured at a low cost.Type: GrantFiled: December 27, 1996Date of Patent: November 24, 1998Assignees: Nippon Telegraph and Telephone Corporation, Showa Electric Wire & Cable Co., Ltd.Inventors: Yoshiaki Takeuchi, Ryo Nagase, Seiko Mitachi, Yuichi Morishita, Akira Kumagai, Yumi Ariga, Kenichi Muta, Kazunari Sugi, Masashi Saijo