Patents by Inventor Takeshi Tonegawa
Takeshi Tonegawa 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: 10720811Abstract: An electric motor for vehicle including a stator; a stator support member; a rotation shaft; a rotor including a bottom wall and a peripheral wall, in which the peripheral wall is provided with a magnet and the bottom wall is configured to be combined with the rotation shaft; and a bearing holder including a tube part, and a water drip hole is formed on a vertically lower side of the tube part, the stator support member being provided with a bearing holder insertion part including a boss part into which the tube part is configured to be inserted, wherein a water drain structure configured to drain a water drop from the water drip hole is provided along a circumferential direction of an inner circumferential surface of the boss part in a vertically lower area of the inner circumferential surface of the boss part.Type: GrantFiled: May 27, 2016Date of Patent: July 21, 2020Assignee: Mitsuba CorporationInventors: Keiichi Hosoi, Shuichi Tsujiyama, Mikio Kawamura, Shingo Watanabe, Hiroki Masuyama, Takeshi Tonegawa, Minoru Ota
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Publication number: 20180019635Abstract: An electric motor for vehicle including a stator; a stator support member; a rotation shaft; a rotor including a bottom wall and a peripheral wall, in which the peripheral wall is provided with a magnet and the bottom wall is configured to be combined with the rotation shaft; and a bearing holder including a tube part, and a water drip hole is formed on a vertically lower side of the tube part, the stator support member being provided with a bearing holder insertion part including a boss part into which the tube part is configured to be inserted, wherein a water drain structure configured to drain a water drop from the water drip hole is provided along a circumferential direction of an inner circumferential surface of the boss part in a vertically lower area of the inner circumferential surface of the boss part.Type: ApplicationFiled: May 27, 2016Publication date: January 18, 2018Inventors: Keiichi Hosoi, Shuichi Tsujiyama, Mikio Kawamura, Shingo Watanabe, Hiroki Masuyama, Takeshi Tonegawa, Minoru Ota
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Publication number: 20100260322Abstract: An X-ray generator comprises a container (1) for maintaining a high vacuum or low pressure gas atmosphere internally, a hemimorphic crystal (4), temperature raising/lowering means (3, 5-7), and a metal target (8) for generating X-rays. In this X-ray generator the metal target (8) has a pointed protrusion protruding toward the hemimorphic crystal (4). When X-rays are generated by raising/lowering the temperature of the hemimorphic crystal (4) by using the temperature raising/lowering means (3, 5-7), the intensity of an electric field formed between the hemimorphic crystal (4) and the metal target (8) increases at the pointed end of the protrusion and thus the intensity of X-rays generated through collision of electrons against the metal target (8) increases. Consequently, an X-ray generator employing a hemimorphic crystal, which is capable of generating X-rays with practically sufficient intensity can be provided.Type: ApplicationFiled: October 22, 2008Publication date: October 14, 2010Applicants: KYOTO UNIVERSITY, THE DOSHISHA, ASAHI ROENTGEN IND. CO., LTD., FUTABA CORPORATIONInventors: Yoshiaki Ito, Shinzo Yoshikado, Yoshikazu Nakanishi, Shinji Fukao, Toru Nakamura, Shigeo Ito, Takeshi Tonegawa, Yohei Fujimura
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Patent number: 7586260Abstract: A non-evaporation getter material suitable for non-evaporation getters disposed in electron devices, such as fluorescent luminous tubes. The getter material is sized and shaped to more efficiently absorb gases actively at low temperatures.Type: GrantFiled: February 21, 2006Date of Patent: September 8, 2009Assignees: Futaba Corporation, Neturen Co., Ltd.Inventors: Takeshi Tonegawa, Shigeo Itoh, Sadanori Takayama, Masateru Taniguchi, Yasumoto Kubo, Kenji Nawamaki, Youhei Fujimura, Mamoru Namikawa, Yoshihisa Marushima, Osamu Idohara, Yoshiaki Inoue, Seiji Yokota, Kazuhiro Kawasaki
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Publication number: 20080083702Abstract: A method for manufacturing an electron emitting device includes disposing a cathode substrate and an anode substrate to be faced to each other in a depressurized atmosphere containing an activation gas, the cathode substrate including a carbon layer formed by applying a paste having a fibrous carbon and carbon impurities on a cathode conductor and drying the coated paste. The method further includes applying a reverse bias voltage to the cathode conductor of the cathode substrate and an anode conductor of the anode substrate, thereby activating the carbon layer.Type: ApplicationFiled: October 5, 2007Publication date: April 10, 2008Applicant: Futaba CorporationInventors: Fumiaki Kataoka, Youhei Fujimura, Takeshi Tonegawa, Yasumoto Kubo, Hiroaki Eguchi, Shigeo Itoh, Tatsuo Yamaura
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Publication number: 20060197428Abstract: A non-evaporation getter material suitable for non-evaporation getters disposed in electron devices, such as fluorescent luminous tubes. The getter material is sized and shaped to more efficiently absorb gases actively at low temperatures.Type: ApplicationFiled: February 21, 2006Publication date: September 7, 2006Inventors: Takeshi Tonegawa, Shigeo Itoh, Sadanori Takayama, Masateru Taniguchi, Yasumoto Kubo, Kenji Nawamaki, Youhei Fujimura, Mamoru Namikawa, Yoshihisa Marushima, Osamu Idohara, Yoshiaki Inoue, Seiji Yokota, Kazuhiro Kawasaki
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Patent number: 6465952Abstract: A vacuum envelope that can improve the vacuum degree in a field emission device is provided. The vacuum envelope includes the cathode side substrate 2 on which field emission elements are formed and the anode substrate 1 spaced by a predetermined distance in the electron emission direction. At least two openings are formed before sealing the vacuum envelope. The remaining gas is ousted from the vacuum envelope by introducing a high temperature gas inside the vacuum envelope for a predetermined period of time. Thereafter, one of the openings is sealed while the envelope is being evacuated to a vacuum state through the remaining openings.Type: GrantFiled: March 10, 1999Date of Patent: October 15, 2002Assignee: Futaba CorporationInventors: Shigeo Itoh, Gentaro Tanaka, Mikio Yokoyama, Takeshi Tonegawa
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Patent number: 6084344Abstract: A vacuum container capable of arranging a getter member therein while preventing an increase in overall height of an envelope and therefore the vacuum container. An anode substrate on which anode electrodes providing a display section are formed and a cathode substrate on which field emission cathodes are formed are arranged opposite to each other and sealedly joined to each other through an outer periphery thereof, to thereby provide an envelope. The cathode substrate is formed with a through-hole communicating with an interior of the envelope. The through-hole has a getter member received therein. The cathode substrate is provided on a portion of an outer surface thereof at which the through-hole is formed with an evacuation pipe through which the envelope is evacuated.Type: GrantFiled: December 10, 1997Date of Patent: July 4, 2000Assignee: Futaba Denshi Kogyo K.K.Inventors: Takao Kishino, Gentaro Tanaka, Shigeo Itoh, Takeshi Tonegawa
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Patent number: 6067819Abstract: A method for manufacturing a glass container and an apparatus therefor capable of providing the container by pressing of a glass substrate using a die while keeping the glass substrate uniformly heated and softened. The glass substrate is heated while being kept lifted from a lower mold of a forming die and then subject to integral forming by the forming die. This permits the glass substrate to be integrally formed into the glass container in the form of a finished product, resulting in the number of steps and time required for processing being reduced.Type: GrantFiled: August 21, 1998Date of Patent: May 30, 2000Assignee: Futaba Denshi Kogyo Kabushiki KaishaInventors: Gentaro Tanaka, Takeshi Tonegawa, Yuuich Kogure, Naoya Takagi
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Patent number: 6039620Abstract: Method for forming a vacuum hermetic vessel. Plural exhaust holes are formed in the first main substrate at a number of positions. A second main substrate is superposed over the first main substrate. The two substrates are hermetically sealed. The two substrates are cut at predetermined positions to form individual vessels. Lead-out electrodes are formed on both the first and second substrates and are not covered by another substrate. The vessels are evacuated and sealed using exhaust tubes.Type: GrantFiled: July 2, 1997Date of Patent: March 21, 2000Assignee: Futaba Denshi Kogyo K.K.Inventors: Shigeo Itoh, Yoshio Makita, Takeshi Tonegawa, Yoshihiko Hirata, Akira Kadowaki
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Patent number: 5827048Abstract: A getter support capable of permitting a getter to be compactly arranged in a vacuum envelope while keeping a space for the getter minimized. The getter support includes holders for vertically interposedly holding a getter, first support legs formed integrally with the holders so as to downwardly extend therefrom, and second support legs formed integrally with the holders so as to upwardly extend therefrom. The getter support is fixedly arranged in a getter chamber while being pressed by elasticity of the second support legs. The second support legs are varied in deflection depending on contact thereof with a second substrate of an envelope. This permits a distance between an upper surface of the getter and the second substrate of the envelope to be constantly kept at a desired value.Type: GrantFiled: October 29, 1996Date of Patent: October 27, 1998Assignee: Futaba Denshi Kogyo K.K.Inventors: Takeshi Tonegawa, Akira Kadowaki, Gentaro Tanaka, Shigeo Itoh, Yuuichi Kogure
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Patent number: 5789858Abstract: A fluorescent display device capable of being sealed while being evacuated to a high vacuum without independently forming any evacuation hole at an electrode formation section of a substrate of an envelope. A cathode substrate is sealedly formed of an electrode formation section of a large plate-like shape provided thereon with a field emission cathode, an evacuation section of a small plate-like shape formed with a cutout, and a seal member. An anode substrate on which a display section is spacedly arranged oppositely to the cathode substrate. A getter chamber including an evacuation tube is connected to the evacuation hole. Thus, the present invention eliminate independent formation of any specific evacuation at the electrode formation section, to thereby prevent damage and contamination of the substrates.Type: GrantFiled: October 4, 1996Date of Patent: August 4, 1998Assignee: Futaba Denshi Kogyo K.K.Inventors: Shigeo Itoh, Takeshi Tonegawa, Mikio Yokoyama, Yuuich Kogure
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Patent number: 5717286Abstract: Electron excited luminous element capable of ensuring satisfactory emission characteristics of emitters for an extended period of time. A hydrophobic insulating film is formed on a glass anode substrate so as to cover an exposed portion thereof between anode electrodes. This keeps the glass anode substrate from being directly attacked by electrons, to thereby prevent decomposition of water and the like contained in a surface of the glass, resulting in oxygen which causes deterioration in emission characteristics of emitter cones being kept from being released from the glass.Type: GrantFiled: May 16, 1996Date of Patent: February 10, 1998Assignee: Futaba Denshi Kogyo K.K.Inventors: Shigeo Itoh, Teruo Watanabe, Tatsuo Yamaura, Takeshi Tonegawa, Takahiro Niiyama, Yuji Nomura
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Patent number: 5693111Abstract: A method for sealedly forming an envelope and an apparatus therefor capable of sealedly bonding an anode substrate and a cathode substrate to each other while preventing misregistration therebetween. A sealing glass material is arranged on a periphery of one of the substrates and the other substrate is put on the one substrate. Then, both substrates are registered with each other and then a laser beam is downwardly irradiated on the sealing glass material through the anode substrate to locally melt the sealing glass material, to thereby temporarily bond both substrates to each other. Then, both substrates are heated in an oven, to thereby sealedly bonded to each other, resulting in sealedly forming an envelope.Type: GrantFiled: July 6, 1995Date of Patent: December 2, 1997Assignee: Futaba Denshi Kogyo K.K.Inventors: Akira Kadowaki, Shigeo Itoh, Youich Kogure, Takeshi Tonegawa
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Patent number: 5635795Abstract: A fluorescent display device (1) includes an air tight envelope (2) having a cathode substrate (3), an anode substrate (4) with a phosphor layer arranged to provide a luminous display, a seal member (5), an evacuation hole (9) formed at a side of the envelope (2), and a getter chamber (10) in communication with the hole (9). The getter chamber (10) is disposed on the outside of the envelope (2) and includes a chamber body (12), and an evacuation tube (13). The getter chamber (10) eliminates the independent formation of an evacuation hole in the cathode substrate (3), and thereby prevents damage and contamination of the cathode substrate (3).Type: GrantFiled: July 14, 1994Date of Patent: June 3, 1997Assignee: Futaba Denshi Kogyo K.K.Inventors: Shigeo Itoh, Takeshi Tonegawa, Mikio Yokoyama, Yuuich Kogure
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Patent number: 5564958Abstract: A method for manufacturing a display device is available that is capable of remarkably improving life characteristics of a display device. A display device placed in a chamber is evacuated to about 10.sup.-7 Torr. Then, reducing gas is introduced into the display device and held therein for several minutes, followed by evacuation of the display device to about 10.sup.-5 Torr. The reducing gas introducing and discharge steps are repeated several times. Thereafter, evacuation of the display device is carried out while keeping the chamber at about 300.degree. C., followed by sealing of the display device.Type: GrantFiled: May 9, 1995Date of Patent: October 15, 1996Assignee: Futaba Denshi Kogyo Kabushiki KaishaInventors: Shigeo Itoh, Mikio Yokoyama, Takeshi Tonegawa, Yuji Uchida, Teruo Watanabe
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Patent number: 5499939Abstract: An evacuation apparatus is capable of evacuating an envelope to a high vacuum without evacuating a whole room or chamber to a high vacuum. An evacuation pipe is connected at a distal end thereof to an evacuation head and a vacuum pump is actuated to evacuate an evacuation chamber to a high vacuum, to thereby evacuate an envelope to a high vacuum. Then, a motor is driven to rotate ball screws, to thereby upwardly move the envelope mounted on the evacuation head. The evacuation pipe is fused at an intermediate portion thereof by a gas burner, to thereby be sealed. Then, the evacuation pipe is cut to disconnect the envelope from the evacuation head.Type: GrantFiled: December 21, 1994Date of Patent: March 19, 1996Assignee: Futaba Denshi Kogyo K.K.Inventors: Shigeo Itoh, Mikio Yokoyama, Takeshi Tonegawa, Akira Kadowaki
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Patent number: 5066885Abstract: An indirectly heated filamentary cathode capable of significantly reducing its resistance, uniformly emitting electrons therefrom and effectively elminating its insulation failure. In the filamentary cathode, a cathode substrate is constituted by a metal conductive layer of a cylindrical shape arranged so as to be contacted with and electrically insulating layer and a fine metal wire wound which are closely contacted together, so that an electron emitting layer may be deposited through the metal conductive layer on the electrically insulating layer.Type: GrantFiled: April 26, 1989Date of Patent: November 19, 1991Assignee: Futaba Denshi Kogyo Kabushiki KaishaInventors: Kiyoshi Morimoto, Shigeo Itoh, Takeshi Tonegawa, Takahiro Niiyama
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Patent number: 4770310Abstract: A casing for a display device of the tipless type is disclosed which is capable of being readily manufactured, and allowing a display device to have a good space factor and exhibit excellent display characteristics. The casing comprises a casing body formed with an evacuation hole and a planar plate lid member arranged to sealingly close the evacuation hole by means of a sealer when the casing is evacuated.Type: GrantFiled: January 14, 1986Date of Patent: September 13, 1988Assignee: Futaba Denshi Kogyo K.K.Inventors: Kiyoshi Morimoto, Shigeo Itoh, Hiroshi Watanabe, Mikio Yokoyama, Takeshi Tonegawa
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Patent number: 4666548Abstract: A process for making a fluorescent display device capable of accomplishing the mass production of a tipless fluorescent display device with good reliability and productivity is disclosed. The process is adapted to carry out, in a single chamber, a step of hermetically bonding an anode substrate and a casing together to form a hermetic envelope and a step of sealing the envelope in vacua.Type: GrantFiled: March 12, 1985Date of Patent: May 19, 1987Assignee: Futaba Denshi Kogyo Kabushiki KaishaInventors: Goro Eto, Shigeo Itoh, Mikio Yokoyama, Takeshi Tonegawa