Patents by Inventor Tetsuo Kitamura
Tetsuo Kitamura 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: 10825476Abstract: A spindle motor includes a base plate on which a through hole is formed, a stator assembly provided at an top side of the base plate having a stator core with stator windings, a circuit board provided at the bottom side of the base plate and to which a lead wire of the stator windings drawn from the through hole to the bottom side is connected. An insulating cover sheet is provided at the top side of the base plate for covering the through hole, the insulating cover sheet being passed through by the lead wire, and a sealing material filling the through hole. The insulating cover sheet has a wire hole and an air vent part communicating with the through hole, wherein the air vent part faces at least a portion of an inside opening of the through hole. The wire hole and the air vent part are separated from each other or are connected to form a single opening.Type: GrantFiled: November 6, 2019Date of Patent: November 3, 2020Assignee: MINEBEA MITSUMI INC.Inventors: Sendy Hanzel, Tobias Imberger, Christoph Fluck, Hideaki Showa, Daigo Nakajima, Tetsuo Kitamura
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Patent number: 10755740Abstract: A spindle motor includes a base plate in which a through hole is formed, a stator core that is provided inside the base plate and is wound with a coil, and a circuit board that is provided outside the base plate and to which a conducting wire of the coil drawn out to outside through the through hole is connected, wherein the through hole includes an inner opening that opens inward of the base plate, an outer opening that opens outward of the base plate, and an intermediate portion having a cylindrical shape that is provided between the inner opening and the outer opening, an enlarged opening is formed to be connected to the outer opening, the enlarged opening is offset to extend toward a side where the circuit board is not present, and the through hole is sealed with a sealing material.Type: GrantFiled: September 26, 2019Date of Patent: August 25, 2020Assignee: MINEBEA MITSUMI INC.Inventors: Hideaki Showa, Daigo Nakajima, Tetsuo Kitamura
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Publication number: 20200143832Abstract: A spindle motor includes a base plate on which a through hole is formed, a stator assembly provided at an top side of the base plate having a stator core with stator windings, a circuit board provided at the bottom side of the base plate and to which a lead wire of the stator windings drawn from the through hole to the bottom side is connected. An insulating cover sheet is provided at the top side of the base plate for covering the through hole, the insulating cover sheet being passed through by the lead wire, and a sealing material filling the through hole. The insulating cover sheet has a wire hole and an air vent part communicating with the through hole, wherein the air vent part faces at least a portion of an inside opening of the through hole. The wire hole and the air vent part are separated from each other or are connected to form a single opening.Type: ApplicationFiled: November 6, 2019Publication date: May 7, 2020Inventors: Sendy HANZEL, Tobias IMBERGER, Christoph FLUCK, Hideaki SHOWA, Daigo NAKAJIMA, Tetsuo KITAMURA
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Publication number: 20200105299Abstract: A spindle motor includes a base plate in which a through hole is formed, a stator core that is provided inside the base plate and is wound with a coil, and a circuit board that is provided outside the base plate and to which a conducting wire of the coil drawn out to outside through the through hole is connected, wherein the through hole includes an inner opening that opens inward of the base plate, an outer opening that opens outward of the base plate, and an intermediate portion having a cylindrical shape that is provided between the inner opening and the outer opening, an enlarged opening is formed to be connected to the outer opening, the enlarged opening is offset to extend toward a side where the circuit board is not present, and the through hole is sealed with a sealing material.Type: ApplicationFiled: September 26, 2019Publication date: April 2, 2020Inventors: Hideaki SHOWA, Daigo NAKAJIMA, Tetsuo KITAMURA
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Patent number: 8681453Abstract: A disk driving apparatus includes a base member, a hub member, and a fluid bearing unit. The base member has a head movement region on which a head unit is to be mounted such that a head portion of the head unit can be moved along the radial direction of a recording face in a reciprocating manner while facing the recording face of a recording disk to be mounted on the hub member, and a recessed housing portion housing the fluid bearing unit such that it surrounds at least a part of a rotor unit supported by the fluid bearing unit. Furthermore, the base member has an inhibiting wall at a boundary between the head movement region and the recessed housing portion so as to prevent a lubricant fluid from migrating toward the recording disk side.Type: GrantFiled: August 27, 2013Date of Patent: March 25, 2014Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.Inventors: Tetsuo Kitamura, Yuji Omura, Aikra Suzuki
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Publication number: 20130342933Abstract: A disk driving apparatus includes a base member, a hub member, and a fluid bearing unit. The base member has a head movement region on which a head unit is to be mounted such that a head portion of the head unit can be moved along the radial direction of a recording face in a reciprocating manner while facing the recording face of a recording disk to be mounted on the hub member, and a recessed housing portion housing the fluid bearing unit such that it surrounds at least a part of a rotor unit supported by the fluid bearing unit. Furthermore, the base member has an inhibiting wall at a boundary between the head movement region and the recessed housing portion so as to prevent a lubricant fluid from migrating toward the recording disk side.Type: ApplicationFiled: August 27, 2013Publication date: December 26, 2013Applicant: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.Inventors: Tetsuo KITAMURA, Yuji OMURA, Aikra SUZUKI
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Patent number: 8553354Abstract: A disk driving apparatus includes a base member, a hub member, and a fluid bearing unit. The base member has a head movement region on which a head unit is to be mounted such that a head portion of the head unit can be moved along the radial direction of a recording face in a reciprocating manner while facing the recording face of a recording disk to be mounted on the hub member, and a recessed housing portion housing the fluid bearing unit such that it surrounds at least a part of a rotor unit supported by the fluid bearing unit. Furthermore, the base member has an inhibiting wall at a boundary between the head movement region and the recessed housing portion so as to prevent a lubricant fluid from migrating toward the recording disk side.Type: GrantFiled: October 2, 2012Date of Patent: October 8, 2013Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.Inventors: Tetsuo Kitamura, Yuji Omura, Aikra Suzuki
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Publication number: 20130083431Abstract: A disk driving apparatus includes a base member, a hub member, and a fluid bearing unit. The base member has a head movement region on which a head unit is to be mounted such that a head portion of the head unit can be moved along the radial direction of a recording face in a reciprocating manner while facing the recording face of a recording disk to be mounted on the hub member, and a recessed housing portion housing the fluid bearing unit such that it surrounds at least a part of a rotor unit supported by the fluid bearing unit. Furthermore, the base member has an inhibiting wall at a boundary between the head movement region and the recessed housing portion so as to prevent a lubricant fluid from migrating toward the recording disk side.Type: ApplicationFiled: October 2, 2012Publication date: April 4, 2013Applicant: ALPHANA TECHNOLOGY CO., LTD.Inventors: Tetsuo KITAMURA, Yuji OMURA, Aikra SUZUKI
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Patent number: 8368282Abstract: A disk drive device includes: a hub on which a recording disk is to be mounted; a base configured to rotatably support the hub via a bearing; a core that is fixed to the base and includes a circular portion and S salient poles (where S is a natural number greater than or equal to 3) extending from the circular portion in the diameter direction; a three-phase coil that is formed by being wound around each of the S salient poles; and a magnet that is fixed to the hub and faces the S salient poles in the diameter direction, and that is provided with P driving magnetic poles in the circumferential direction (where P is a natural number greater than or equal to 2).Type: GrantFiled: January 21, 2010Date of Patent: February 5, 2013Assignee: Alphana Technology Co., Ltd.Inventors: Minoru Sano, Tetsuo Kitamura
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Patent number: 8218991Abstract: A fixing device according to an embodiment of the present invention heats a metal conductive layer of a heat roller using an induction current generating coil. In order to supplement a heat capacity of the heat roller, a press roller having a large heat capacity is heated by a halogen lamp. During a start of activation of an image forming apparatus, when a printer control circuit is started, the supply of electric power to the halogen lamp is started before warming-up is started.Type: GrantFiled: November 19, 2007Date of Patent: July 10, 2012Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Hiroshi Nakayama, Yohei Doi, Tetsuo Kitamura, Osamu Takagi, Satoshi Kinouchi, Yoshinori Tsueda, Kazuhiko Kikuchi, Masanori Takai, Toyoyasu Kusaka, Toshihiro Sone
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Patent number: 8099007Abstract: In a heat roller of a fixing apparatus according to an embodiment of the present invention, a sleeve is slidable with respect to a supporting roller. Flanges that regulate the sleeve have smooth surfaces, are arranged at gaps apart from a foamed rubber layer of the supporting roller, and freely rotate with respect to the supporting roller. Edges at both ends of the foamed rubber layer of the supporting roller are formed in an R shape and set shorter than the length of a body of the press roller. The sleeve has markings for detecting a state of the heat roller.Type: GrantFiled: November 19, 2007Date of Patent: January 17, 2012Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Yoshinori Tsueda, Osamu Takagi, Satoshi Kinouchi, Tetsuo Kitamura, Hiroshi Nakayama, Yohei Doi, Kazuhiko Kikuchi, Masanori Takai, Toyoyasu Kusaka, Toshihiro Sone
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Patent number: 8078073Abstract: In a fixing apparatus of an embodiment of the invention, a heat roller forwardly and reversely rotated by a drive motor capable of forwardly and reversely rotating is heated by an induction heating coil also when it is reversely rotated. Further, the roller control temperature of the heat roller by a control system is adjusted according to a time of forward rotation of the heat roller and a time of reverse rotation, or a time when the heat roller and a press roller are separated from each other and a time when they are in contact with each other. Besides, after a specified time has passed since an instruction of reverse rotation or forward rotation by a drive signal, output of the induction heating coil is tuned on.Type: GrantFiled: November 19, 2007Date of Patent: December 13, 2011Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Satoshi Kinouchi, Osamu Takagi, Yoshinori Tsueda, Tetsuo Kitamura, Hiroshi Nakayama, Yohei Doi, Kazuhiko Kikuchi, Masanori Takai, Toyoyasu Kusaka, Toshihiro Sone
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Patent number: 8050610Abstract: A heat roller of a fixing apparatus according to an embodiment of the invention has a slidable metal belt on an outer side of an elastic roller. At the room temperature, the outer diameter of the elastic roller is smaller than the inner diameter of the metal belt. On the other hand, when the elastic roller is thermally expanded, the metal belt and the elastic roller fit onto each other in a state in which the metal belt fastens the elastic roller.Type: GrantFiled: March 8, 2011Date of Patent: November 1, 2011Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Osamu Takagi, Satoshi Kinouchi, Yoshinori Tsueda, Tetsuo Kitamura, Hiroshi Nakayama, Yohei Doi, Kazuhiko Kikuchi, Masanori Takai, Toyoyasu Kusaka, Toshihiro Sone
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Patent number: 8036556Abstract: A fixing apparatus according to an embodiment of the present invention controls, using a CPU and a temperature comparator, an inverter circuit that supplies electric power to an induction heating coil and performs temperature control for a heat roller. The CPU adjusts and controls a power value supplied by the inverter circuit. When the adjustment and control of the power value by the CPU is late, the inverter circuit is ON-OFF controlled by the temperature comparator.Type: GrantFiled: November 19, 2007Date of Patent: October 11, 2011Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Satoshi Kinouchi, Osamu Takagi, Yoshinori Tsueda, Tetsuo Kitamura, Hiroshi Nakayama, Yohei Doi, Kazuhiko Kikuchi, Masanori Takai, Toyoyasu Kusaka, Toshihiro Sone
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Publication number: 20110170918Abstract: A heat roller of a fixing apparatus according to an embodiment of the invention has a slidable metal belt on an outer side of an elastic roller. At the room temperature, the outer diameter of the elastic roller is smaller than the inner diameter of the metal belt. On the other hand, when the elastic roller is thermally expanded, the metal belt and the elastic roller fit onto each other in a state in which the metal belt fastens the elastic roller.Type: ApplicationFiled: March 8, 2011Publication date: July 14, 2011Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHAInventors: Osamu Takagi, Satoshi Kinouchi, Yoshinori Tsueda, Tetsuo Kitamura, Hiroshi Nakayama, Yohei Doi, Kazuhiko Kikuchi, Masanori Takai, Toyoyasu Kusaka, Toshihiro Sone
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Patent number: 7925197Abstract: A heat roller of a fixing apparatus according to an embodiment of the invention has a slidable metal belt on an outer side of an elastic roller. At the room temperature, the outer diameter of the elastic roller is smaller than the inner diameter of the metal belt. On the other hand, when the elastic roller is thermally expanded, the metal belt and the elastic roller fit onto each other in a state in which the metal belt fastens the elastic roller.Type: GrantFiled: November 19, 2007Date of Patent: April 12, 2011Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Osamu Takagi, Satoshi Kinouchi, Yoshinori Tsueda, Tetsuo Kitamura, Hiroshi Nakayama, Yohei Doi, Kazuhiko Kikuchi, Masanori Takai, Toyoyasu Kusaka, Toshihiro Sone
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Publication number: 20100238591Abstract: A disk drive device includes: a hub on which a recording disk is to be mounted; a base configured to rotatably support the hub via a bearing; a core that is fixed to the base and includes a circular portion and S salient poles (where S is a natural number greater than or equal to 3) extending from the circular portion in the diameter direction; a three-phase coil that is formed by being wound around each of the S salient poles; and a magnet that is fixed to the hub and faces the S salient poles in the diameter direction, and that is provided with P driving magnetic poles in the circumferential direction (where P is a natural number greater than or equal to 2).Type: ApplicationFiled: January 21, 2010Publication date: September 23, 2010Applicant: ALPHANA TECHNOLOGY CO., LTD.Inventors: Minoru Sano, Tetsuo Kitamura
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Patent number: 7792445Abstract: In a drive detection device for a fixing device according to an embodiment of the present invention, a non-paper passing area of a heat roller is formed by a surface where a metal conductive layer is exposed and a surface where a silicon rubber layer is exposed. The drive detection device has an infrared temperature sensor that detects the temperature of the non-paper passing area. When a detection result of the infrared temperature sensor is fluctuated a fixed amount or more in a predetermined time, the drive detection device determines that the heat roller is rotating. Otherwise, the drive detection device determines that the heat roller is not rotating.Type: GrantFiled: November 29, 2007Date of Patent: September 7, 2010Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Toshihiro Sone, Osamu Takagi, Satoshi Kinouchi, Yoshinori Tsueda, Tetsuo Kitamura, Hiroshi Nakayama, Yohei Doi, Kazuhiko Kikuchi, Masanori Takai, Toyoyasu Kusaka
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Patent number: 7787789Abstract: A fixing device according to an embodiment of the present invention includes a microcomputer that exclusively performs temperature control for the fixing device. The microcomputer periodically calculates electric power that can be supplied to the fixing device. The microcomputer detects the temperature of the fixing device and the temperature in a printer unit and feedback-controls electric power supplied to the fixing device.Type: GrantFiled: November 19, 2007Date of Patent: August 31, 2010Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Hiroshi Nakayama, Yohei Doi, Tetsuo Kitamura, Osamu Takagi, Satoshi Kinouchi, Yoshinori Tsueda, Kazuhiko Kikuchi, Masanori Takai, Toyoyasu Kusaka, Toshihiro Sone
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Patent number: 7672632Abstract: A heat roller of a fixing apparatus according to an embodiment of the invention has a slidable metal belt on an outer side of an elastic roller. The width of the metal belt is made larger than that of the elastic roller. Flanges, each of which regulates a sliding movement of the metal belt by being in contact with an edge of the metal belt, are provided on both sides of a press roller opposite the metal belt.Type: GrantFiled: November 19, 2007Date of Patent: March 2, 2010Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Toshihiro Sone, Osamu Takagi, Satoshi Kinouchi, Yoshinori Tsueda, Tetsuo Kitamura, Hiroshi Nakayama, Yohei Doi, Kazuhiko Kikuchi, Masanori Takai, Toyoyasu Kusaka