Patents by Inventor Masahiko Sakamoto
Masahiko Sakamoto 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: 11961960Abstract: Provided is a lithium secondary battery having a higher capacity and a longer life. The lithium secondary battery includes: a positive electrode including a material capable of intercalation and deintercalation of a lithium ion; a lithium ion-conductive electrolyte including a salen-based metal complex; and a negative electrode including a material capable of occlusion and release of a lithium metal or a lithium ion. The salen-based metal complex is selected from (R,R)-(?)-N,N?-bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediaminotitanium chloride (TiSl), VSl, CrSl, MnSl, FeSl, CoSl, and RuSl.Type: GrantFiled: May 16, 2019Date of Patent: April 16, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shuhei Sakamoto, Yoko Ono, Masahiko Hayashi, Takeshi Komatsu
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Patent number: 7907505Abstract: A code disk for a high-resolution encoder that can detect an absolute position and a method for manufacturing a mold to produce the code disk are provided. The code disk is formed by using transparent substrate. The code disk includes a plurality of tracks provided on the transparent substrate and an area provided between the plurality of tracks. Each surface of the plurality of tracks has a different pattern. A level of the area is different from that of the each surface of the plurality of tracks. The method for manufacturing the mold includes steps of processing a plurality of tracks with a flat surface on material; processing an area with a level different from that of each surface, between the plurality of tracks; forming different patterns on the each surface; plating the first material; and peeling plating from the first material to obtain a mold.Type: GrantFiled: September 22, 2009Date of Patent: March 15, 2011Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masahiko Sakamoto, Katsutoshi Kamakura, Masahiro Otani, Yasushi Kawashima, Isamu Higashioka, Masaru Imaizumi, Osamu Murakami, Koichi Sugimoto
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Publication number: 20100009072Abstract: A code disk for a high-resolution encoder that can detect an absolute position and a method for manufacturing a mold to produce the code disk are provided. The code disk is formed by using transparent substrate. The code disk includes a plurality of tracks provided on the transparent substrate and an area provided between the plurality of tracks. Each surface of the plurality of tracks has a different pattern. A level of the area is different from that of the each surface of the plurality of tracks. The method for manufacturing the mold includes steps of processing a plurality of tracks with a flat surface on material; processing an area with a level different from that of each surface, between the plurality of tracks; forming different patterns on the each surface; plating the first material; and peeling plating from the first material to obtain a mold.Type: ApplicationFiled: September 22, 2009Publication date: January 14, 2010Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Masahiko Sakamoto, Koichi Sugimoto, Katsutoshi Kamakura, Masahiro Otani, Yasushi Kawashima, Isamu Higashioka, Masaru Imaizumi, Osamu Murakami
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Patent number: 7612331Abstract: A code disk for a high-resolution encoder that can detect an absolute position and a method for manufacturing a mold to produce the code disk are provided. The code disk is formed by using transparent substrate. The code disk includes a plurality of tracks provided on the transparent substrate and an area provided between the plurality of tracks. Each surface of the plurality of tracks has a different pattern. A level of the area is different from that of the each surface of the plurality of tracks. The method for manufacturing the mold includes steps of processing a plurality of tracks with a flat surface on material; processing an area with a level different from that of each surface, between the plurality of tracks; forming different patterns on the each surface; plating the first material; and peeling plating from the first material to obtain a mold.Type: GrantFiled: February 15, 2007Date of Patent: November 3, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masahiko Sakamoto, Koichi Sugimoto, Katsutoshi Kamakura, Masahiro Otani, Yasushi Kawashima, Isamu Higashioka, Masaru Imaizumi, Osamu Murakami
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Patent number: 7538313Abstract: In an optical encoder comprising an optical scale in which a light transmission portion and a light non-transparent portion are arranged and an output pattern obtained by emitting an incident light functions as an optical code, a light source portion and a light detecting portion, the light non-transparent portion is constituted of at least one pair of inclined surfaces which are opposed in such a manner as to become farther away from each other towards the side where the incident light enters and set so that an incident angle of the optical axis of the incident light from the light source should not be smaller than a critical angle of incidence, and the light non-transparent portion is constructed so that the incident light which enters one inclined surface should be totally reflected thereon to enter the other inclined surface and then at least part of the incident light should be reflected on the other inclined surface, and a reflected light which is reflected on the other inclined surface should not enterType: GrantFiled: September 13, 2007Date of Patent: May 26, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Toru Oka, Yoichi Ohmura, Hajime Nakajima, Masahiko Sakamoto, Toshikazu Kitagaki
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Publication number: 20080277569Abstract: In an optical encoder comprising an optical scale in which a light transmission portion and a light non-transparent portion are arranged and an output pattern obtained by emitting an incident light functions as an optical code, a light source portion and a light detecting portion, the light non-transparent portion is constituted of at least one pair of inclined surfaces which are opposed in such a manner as to become farther away from each other towards the side where the incident light enters and set so that an incident angle of the optical axis of the incident light from the light source should not be smaller than a critical angle of incidence, and the light non-transparent portion is constructed so that the incident light which enters one inclined surface should be totally reflected thereon to enter the other inclined surface and then at least part of the incident light should be reflected on the other inclined surface, and a reflected light which is reflected on the other inclined surface should not enterType: ApplicationFiled: September 13, 2007Publication date: November 13, 2008Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Toru Oka, Yoichi Ohmura, Hajime Nakajima, Masahiko Sakamoto, Toshikazu Kitagaki
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Patent number: 7285769Abstract: In an optical encoder comprising an optical scale in which a light transmission portion and a light non-transparent portion are arranged and an output pattern obtained by emitting an incident light functions as an optical code, a light source portion and a light detecting portion, the light non-transparent portion is constituted of at least one pair of inclined surfaces which are opposed in such a manner as to become farther away from each other towards the side where the incident light enters and set so that an incident angle of the optical axis of the incident light from the light source should not be smaller than a critical angle of incidence, and the light non-transparent portion is constructed so that the incident light which enters one inclined surface should be totally reflected thereon to enter the other inclined surface and then at least part of the incident light should be reflected on the other inclined surface, and a reflected light which is reflected on the other inclined surface should not enterType: GrantFiled: August 23, 2004Date of Patent: October 23, 2007Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Toru Oka, Yoichi Ohmura, Hajime Nakajima, Masahiko Sakamoto, Toshikazu Kitagaki
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Patent number: 7262710Abstract: Imaging device picks up an image of the area around a vehicle, edge extraction function extracts an edge image from the image picked up by the imaging device, edge width standardization function standardizes an edge width of the edge image extracted by the edge extraction function, counting functions increments a count value corresponding to a position where the edge image standardized by the edge width standardization function is detected, and also initializes a count value corresponding to a position where the standardized edge image is not detected, moving speed detection function calculates a moving direction and moving speed of the edge image extracted by the edge extraction function based on the inclination of the count values, and collision time calculation function calculates the time of collision with an object by utilizing the position and the moving speed of the edge image calculated by the moving speed detection function.Type: GrantFiled: September 1, 2005Date of Patent: August 28, 2007Assignee: Nissan Motor Co., Ltd.Inventors: Seigo Watanabe, Rumiko Oshima, Masahiko Sakamoto
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Publication number: 20070147222Abstract: A code disk for a high-resolution encoder that can detect an absolute position and a method for manufacturing a mold to produce the code disk are provided. The code disk is formed by using transparent substrate. The code disk includes a plurality of tracks provided on the transparent substrate and an area provided between the plurality of tracks. Each surface of the plurality of tracks has a different pattern. A level of the area is different from that of the each surface of the plurality of tracks. The method for manufacturing the mold includes steps of processing a plurality of tracks with a flat surface on material; processing an area with a level different from that of each surface, between the plurality of tracks; forming different patterns on the each surface; plating the first material; and peeling plating from the first material to obtain a mold.Type: ApplicationFiled: February 15, 2007Publication date: June 28, 2007Inventors: Masahiko Sakamoto, Koichi Sugimoto, Katsutoshi Kamakura, Masahiro Otani, Yasushi Kawashima, Isamu Higashioka, Masaru Imaizumi, Osamu Murakami
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Patent number: 7193962Abstract: A code disk for a high-resolution encoder that can detect an absolute position and a method for manufacturing a mold to produce the code disk are provided. The code disk is formed by using transparent substrate. The code disk includes a plurality of tracks provided on the transparent substrate and an area provided between the plurality of tracks. Each surface of the plurality of tracks has a different pattern. A level of the area is different from that of the each surface of the plurality of tracks. The method for manufacturing the mold includes steps of processing a plurality of tracks with a flat surface on material; processing an area with a level different from that of each surface, between the plurality of tracks; forming different patterns on the each surface; plating the first material; and peeling plating from the first material to obtain a mold.Type: GrantFiled: December 31, 2002Date of Patent: March 20, 2007Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masahiko Sakamoto, Koichi Sugimoto, Katsutoshi Kamakura, Masahiro Otani, Yasushi Kawashima, Isamu Higashioka, Masaru Imaizumi, Osamu Murakami
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Publication number: 20070034786Abstract: In an optical encoder comprising an optical scale in which a light transmission portion and a light non-transparent portion are arranged and an output pattern obtained by emitting an incident light functions as an optical code, a light source portion and a light detecting portion, the light non-transparent portion is constituted of at least one pair of inclined surfaces which are opposed in such a manner as to become farther away from each other towards the side where the incident light enters and set so that an incident angle of the optical axis of the incident light from the light source should not be smaller than a critical angle of incidence, and the light non-transparent portion is constructed so that the incident light which enters one inclined surface should be totally reflected thereon to enter the other inclined surface and then at least part of the incident light should be reflected on the other inclined surface, and a reflected light which is reflected on the other inclined surface should not enterType: ApplicationFiled: August 23, 2004Publication date: February 15, 2007Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Toru Oka, Yoichi Ohmura, Hajime Nakajima, Masahiko Sakamoto, Toshikazu Kitagaki
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Patent number: 7097091Abstract: Disclosed is a friction stir welding method for welding two members to be welded which differ in physical properties and/or mechanical properties by abutting the two members to each other, inserting a pin portion of a rotary tool having the pin portion and a shoulder portion to the abutment surfaces of the two members, and moving the rotary tool along the abutment surfaces. The pin portion is inserted to only one of the members, the pin portion is not inserted to the other of the members but only the shoulder portion is set in contact with the other of the members, and, while this condition is maintained, the rotary tool is moved. With this method, only the member on the side where the pin is inserted can be made to undergo plastic flow attendant on a friction stir action. The metal in plastic flow is pressed against the opposite member at an elevated temperature and high pressure, whereby diffusion of atoms is caused in the vicinity of the abutment surfaces, and the members are welded.Type: GrantFiled: July 23, 2002Date of Patent: August 29, 2006Assignee: Hitachi, Ltd.Inventors: Hisanori Okamura, Kinya Aota, Kouji Satou, Masahiko Sakamoto
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Publication number: 20060062432Abstract: Imaging means picks up an image of the area around a vehicle, edge extraction means extracts an edge image from the image picked up by the imaging means, edge width standardization means standardizes an edge width of the edge image extracted by the edge extraction means, counting means increments a count value corresponding to a position where the edge image standardized by the edge width standardization means is detected, and also initializes a count value corresponding to a position where the standardized edge image is not detected, moving speed detection means calculates a moving direction and moving speed of the edge image extracted by the edge extraction means based on the inclination of the count values, and collision time calculation means calculates the time of collision with an object by utilizing the position and the moving speed of the edge image calculated by the moving speed detection means.Type: ApplicationFiled: September 1, 2005Publication date: March 23, 2006Inventors: Seigo Watanabe, Rumiko Oshima, Masahiko Sakamoto
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Patent number: 6972402Abstract: A photoelectric rotary encoder includes a light source that emits a light beam, a returning section that returns the emitted light beam to a direction opposite to an emitting direction of the beam, and a photodetector that is disposed on a substrate on which the light source is disposed and that detects the returned light beam via a disk having a detection pattern section. The photoelectric rotary encoder detects rotational displacement of the disk based on the detected returned light beam. In this photoelectric rotary encoder, an optical element that lets a stray beam component of the light beam from the light source escape via a side surface of the optical element, is disposed in front of the substrate on which the light source and the photodetector are disposed. The optical element covers the substrate and integrates the optical element and the substrate.Type: GrantFiled: May 30, 2003Date of Patent: December 6, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yoichi Ohmura, Toru Oka, Toshiro Nakashima, Hajime Nakajima, Hirokazu Sakuma, Takashi Okamuro, Masahiko Sakamoto, Koichi Sugimoto
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Patent number: 6875951Abstract: A laser machining device according to the invention is provided with a laser oscillator for generating a laser beam, a main deflecting galvannometer mirror, an F? lens, and a sub-deflecting means arranged in an optical path between the laser oscillator and the main deflecting galvanometer mirror. A means for splitting a laser beam is provided, and the sub-deflecting means is inserted into the optical path of one of the split laser beams. At the same time, both the split laser beams are incident from the same main deflecting galvannometer mirror to the F? lens, and a numerical aperture in the optical system constituted by the main deflecting galvannometer mirror, the F? lens, and an object is set to be not more than 0.08.Type: GrantFiled: July 27, 2001Date of Patent: April 5, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masahiko Sakamoto, Shozui Takeno, Yasuhiko Iwai, Toshiyuki Hokodate, Miki Kurosawa
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Patent number: 6739495Abstract: Disclosed is a friction stir welding method for welding two members to be welded which differ in physical properties and/or mechanical properties by abutting the two members to each other, inserting a pin portion of a rotary tool having the pin portion and a shoulder portion to the abutment surfaces of the two members, and moving the rotary tool along the abutment surfaces. The pin portion is inserted to only one of the members, the pin portion is not inserted to the other of the members but only the shoulder portion is set in contact with the other of the members, and, while this condition is maintained, the rotary tool is moved. With this method, only the member on the side where the pin is inserted can be made to undergo plastic flow attendant on a friction stir action. The metal in plastic flow is pressed against the opposite member at an elevated temperature and high pressure, whereby diffusion of atoms is caused in the vicinity of the abutment surfaces, and the members are welded.Type: GrantFiled: January 17, 2003Date of Patent: May 25, 2004Assignee: Hitachi, Ltd.Inventors: Hisanori Okamura, Kinya Aota, Kouji Satou, Masahiko Sakamoto
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Patent number: 6690024Abstract: A laser inspection apparatus has a light source 13 for outputting laser beam, application means 5, 33, 34 for irradiating the laser beam 7 output from the light source 13 to any desired position of a detected body 21, first detection means 2 for detecting fluorescence 8 generated from the detected body 21 to which the laser beam 7 is applied, and second detection means 3 for detecting reflected light 8 scattered on a surface of the detected body 21 to which the laser beam 7 is applied.Type: GrantFiled: July 18, 2000Date of Patent: February 10, 2004Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Koji Funaoka, Masahiko Sakamoto, Shozui Takeno, Hiroshi Sasai
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Publication number: 20040004181Abstract: A photoelectric rotary encoder includes a light source that emits a beam, a returning section that returns the emitted beam to a direction opposite to a emitting direction of the beam, and a photodetector that is disposed on a substrate on which the light source is disposed and that receives the returned beam via a disk having a detection pattern section. The photoelectric rotary encoder detects a rotation displacement of the disk based on the received signal. In this photoelectric rotary encoder, an optical element that lets a stray beam component of the beam from the light source escape to the outside via the side surface of the optical element, is disposed in front of the substrate on which the light source and the photodetector are disposed. The optical element covers the substrate to integrate the optical element and the substrate together.Type: ApplicationFiled: May 30, 2003Publication date: January 8, 2004Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Yoichi Ohmura, Toru Oka, Toshiro Nakashima, Hajime Nakajima, Hirokazu Sakuma, Takashi Okamuro, Masahiko Sakamoto, Koichi Sugimoto
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Publication number: 20030137908Abstract: A code disk for a high-resolution encoder that can detect an absolute position and a method for manufacturing a mold to produce the code disk are provided. The code disk is formed by using transparent substrate. The code disk includes a plurality of tracks provided on the transparent substrate and an area provided between the plurality of tracks. Each surface of the plurality of tracks has a different pattern. A level of the area is different from that of the each surface of the plurality of tracks. The method for manufacturing the mold includes steps of processing a plurality of tracks with a flat surface on material; processing an area with a level different from that of each surface, between the plurality of tracks; forming different patterns on the each surface; plating the first material; and peeling plating from the first material to obtain a mold.Type: ApplicationFiled: December 31, 2002Publication date: July 24, 2003Inventors: Masahiko Sakamoto, Koichi Sugimoto, Katsutoshi Kamakura, Masahiro Otani, Yasushi Kawashima, Isamu Higashioka, Masaru Imaizumi, Osamu Murakami
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Patent number: 6595403Abstract: The invention intends to reduce a frequency at which defects occur in a welding region during friction stir welding, and to improve the reliability of the welding region. The invention resides in a friction stir welding apparatus wherein a distance to the surfaces of the workpieces is detected by a detector, a change of the detected distance is found by a signal processing device, and a tool is rotated by a rotation driving device in a state where a vertical driving device is controlled by a control device so as to suppress the found change, whereby a plastic fluidity of the workpieces is caused to accomplish joining of the workpieces.Type: GrantFiled: August 29, 2001Date of Patent: July 22, 2003Assignee: Hitachi, Ltd.Inventors: Hisanori Okamura, Masahiko Sakamoto, Kinya Aota, Isao Funyu, Kouichi Watanabe, Akihiro Sato, Masakuni Ezumi, Yasuo Ishimaru