Patents by Inventor Koji Kuyama
Koji Kuyama 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: 20130026865Abstract: A motor includes a shaft, a rotor mounted to the shaft along an axial direction of the shat, a stator confronting an outer wall of the rotor via a space, a thrust plate, and a buffering plate having elastic force. The rotor and the stator are disposed such that a magnetic center of the rotor is away from a magnetic center of the stator by a given distance along the axial direction. The thrust plate is disposed in the axial direction and in a direction along which restoring force acts. The buffering plate is disposed oppositely to the shaft relative to the thrust plate and supports the thrust plate.Type: ApplicationFiled: June 6, 2011Publication date: January 31, 2013Applicant: PANASONIC CORPORATIONInventors: Masao Kojima, Tomohiko Naya, Koji Kuyama, Yasushi Kamada
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Patent number: 8139317Abstract: The present invention provides a disk drive device that can appropriately clamp a disk by means of magnetic force even when the disk drive device is very small. A clamping magnet 16 on which a disk 20 is mounted is attached to a turntable portion 15b of a rotor frame 15 to attract the disk 20. The clamping magnet 16 is configured so that the disk 20 can be mounted on the clamping magnet 16. An area of the rotor frame 15 from the turntable portion 15b to a boss portion 15a is composed of a ferromagnetic material.Type: GrantFiled: October 9, 2007Date of Patent: March 20, 2012Assignee: Minebea Motor Manufacturing CorporationInventors: Kinjirou Okinaga, Masahito Hidaka, Koji Kuyama
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Patent number: 8084906Abstract: A brushless motor is provided which has excellent anti-impact properties and is easily assembled even if the brushless motor is reduced in size. A stator (2) includes a bearing (5) for holding a rotating shaft (3), a bearing housing (6) in which the bearing (5) is placed vertically relative to the stator base (1), a thrust plate (7) for receiving one end of the rotating shaft (3) in a thrust direction, a metal thrust cover (8) for holding the thrust plate (7), a metal installation member (25) including an annular section (25a) which is superposed over a base (6b) of the bearing housing (6) and projecting pin sections (25b) which project from the annular section (25a) to the outer periphery of the thrust cover (8). The projecting pin sections (25b) of the installation member (25) have projection sections welded to the thrust cover (8).Type: GrantFiled: October 9, 2007Date of Patent: December 27, 2011Assignee: Minebea Motor Manufacturing CorporationInventors: Masahito Hidaka, Kinjirou Okinaga, Koji Kuyama
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Publication number: 20110050051Abstract: A mounting structure 1 in which an electronic component 5 is surface-mounted with solder 4 to a wiring substrate 2 is disclosed. The solder is Sn—Ag—Bi—In-based solder containing 0.1% by weight or more and 5% by weight or less of Bi, and more than 3% by weight and less than 9% by weight of In, with the balance being made up of Sn, Ag and unavoidable impurities. The wiring substrate has a coefficient of linear expansion of 13 ppm/K or less in all directions. Thus, it is possible to realize a mounting structure using lead-free solder and for which the occurrence of cracks in a solder joint portion due to a 1000-cycle thermal shock test from ?40 to 150° C. has been suppressed.Type: ApplicationFiled: February 22, 2010Publication date: March 3, 2011Applicant: Panasonic CorporationInventors: Kenji Kondo, Masahito Hidaka, Koji Kuyama, Yutaka Kamogi
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Publication number: 20110031786Abstract: A centrifugal multi-blade impeller (10) that has a plurality of blades (11) around a central axis of rotation (10a) and that radially outwardly blows air taken in along the central axis of rotation is housed in a spiral scroll casing (20). The ratio of H/D of height H of the centrifugal multi-blade impeller in a direction of the central axis of rotation to diameter D of the centrifugal multi-blade impeller is 0.2 or less. The scroll casing has a logarithmic spiral spread angle ? of 2.0 degrees or more. It is thereby possible to provide a small and low profile centrifugal air blower that has high air blowing performance and is low noise.Type: ApplicationFiled: March 9, 2010Publication date: February 10, 2011Applicant: PANASONIC CORPORATIONInventors: Michihiro Kurokawa, Masao Kojima, Koji Kuyama, Masahito Hidaka, Mineaki Isoda
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Publication number: 20100314958Abstract: A brushless motor is provided which has excellent anti-impact properties and is easily assembled even if the brushless motor is reduced in size. A stator (2) includes a bearing (5) for holding a rotating shaft (3), a bearing housing (6) in which the bearing (5) is placed vertically relative to the stator base (1), a thrust plate (7) for receiving one end of the rotating shaft (3) in a thrust direction, a metal thrust cover (8) for holding the thrust plate (7), a metal installation member (25) including an annular section (25a) which is superposed over a base (6b) of the bearing housing (6) and projecting pin sections (25b) which project from the annular section (25a) to the outer periphery of the thrust cover (8). The projecting pin sections (25b) of the installation member (25) have projection sections welded to the thrust cover (8).Type: ApplicationFiled: October 9, 2007Publication date: December 16, 2010Applicant: Panasonic CorporationInventors: Masahito Hidaka, Kinjirou Okinaga, Koji Kuyama
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Patent number: 7714474Abstract: In a stator core having “N” slots, a tooth-width centerline of a linear yoke and a first extension line extended horizontally from a center of rotary shaft toward the linear yoke form a first angle. Assume there are first point on the first extension line at a first distance from the center, a second extension line drawn at a second distance horizontally from the center toward the linear yoke and extended vertically toward arc-shaped yokes, and a third extension line drawn from the center toward teeth ends of the linear yokes with angle “K”. The second and third extension line intersect at a second point. A line between the first and second points intersects with the first extension line, thereby forming the first angle. In this structure, 0<a<b, and (360/2N?60/2N)°<K<(360/2N+60/2N)° are established, where “a”, “b” are the first and the second distances respectively.Type: GrantFiled: November 24, 2006Date of Patent: May 11, 2010Assignee: Panasonic CorporationInventors: Yuichi Yoshikawa, Yuichi Tanabe, Hiroshi Murakami, Hideharu Hiwaki, Koji Kuyama, Akio Ando
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Patent number: 7638912Abstract: In a separation preventing mechanism used in a brushless motor, an insertion section is formed into a separation preventing member (5) using resin, which has a form difficult to shape with a metal pressed part, and to which a latching member (4) can be inserted by combining rotation and shaft-direction insertion, making it easy to disassemble it after assembly and size adjustment.Type: GrantFiled: July 6, 2005Date of Patent: December 29, 2009Assignee: Panasonic CorporationInventors: Toshiyuki Nishikata, Koji Kuyama, Kinjiro Okinaga, Kumio Masuda, Hiroshi Ikeno, Tsuyoshi Kanou
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Publication number: 20090161252Abstract: The present invention provides a disk drive device that can appropriately clamp a disk by means of magnetic force even when the disk drive device is very small. A clamping magnet 16 on which a disk 20 is mounted is attached to a turntable portion 15b of a rotor frame 15 to attract the disk 20. The clamping magnet 16 is configured so that the disk 20 can be mounted on the clamping magnet 16. An area of the rotor frame 15 from the turntable portion 15b to a boss portion 15a is composed of a ferromagnetic material.Type: ApplicationFiled: October 9, 2007Publication date: June 25, 2009Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Kinjirou Okinaga, Masahito Hidaka, Koji Kuyama
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Publication number: 20090134738Abstract: In a stator core having “N” slots, a tooth-width centerline of a linear yoke and a first extension line extended horizontally from a center of rotary shaft toward the linear yoke form a first angle. Assume there are first point on the first extension line at a first distance from the center, a second extension line drawn at a second distance horizontally from the center toward the linear yoke and extended vertically toward arc-shaped yokes, and a third extension line drawn from the center toward teeth ends of the linear yokes with angle “K”. The second and third extension line intersect at a second point. A line between the first and second points intersects with the first extension line, thereby forming the first angle. In this structure, 0<a<b, and (360/2N?60/2N)°<K<(360/2N+60/2N)° are established, where “a”, “b” are the first and the second distances respectively.Type: ApplicationFiled: November 24, 2006Publication date: May 28, 2009Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Yuichi Yoshikawa, Yuichi Tanabe, Hiroshi Murakami, Hideharu Hiwaki, Koji Kuyama, Akio Ando
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Patent number: 7474023Abstract: The disc-driving unit is formed of a rotor having a turntable on which a disc is mounted, a stator having a bearing housing, and a drop-guard mechanism for protecting the rotor from coming out of the stator. On the turntable, a plurality of engaging sections are integrally formed, while on the bearing housing, an engaged section is integrally formed. The engaged section has a plurality of recesses each of which has an opening width wide enough for passing through each of the engaging sections and a plurality of guides for helically guiding the engaging sections into the recesses. A helical engagement of the engaging sections and the engaged section completes the drop-guard mechanism.Type: GrantFiled: May 18, 2006Date of Patent: January 6, 2009Assignee: Panasonic CorporationInventors: Toshiyuki Nishikata, Koji Kuyama, Hiroshi Ikeno
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Patent number: 7466050Abstract: Fluid bearing mechanisms (6a and 6b) are formed between a shaft (2) and a central part (21) of an oil impregnated sintered sleeve (13). The oil impregnated sintered sleeve (13) has such an inner surface formed to be larger in aperture ratio at a thrust support end (23) and a loading end (22) than at a central part (21). With this configuration, it is possible to achieve a brushless motor which can suppress an increase in bearing loss while obtaining necessary bearing stiffness at high rpm.Type: GrantFiled: September 27, 2005Date of Patent: December 16, 2008Assignee: Panasonic CorporationInventors: Koji Kuyama, Kumio Masuda, Kinjiro Okinaga
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Publication number: 20060271945Abstract: The disc-driving unit is formed of a rotor having a turntable on which a disc is mounted, a stator having a bearing housing, and a drop-guard mechanism for protecting the rotor from coming out of the stator. On the turntable, a plurality of engaging sections are integrally formed, while on the bearing housing, an engaged section is integrally formed. The engaged section has a plurality of recesses each of which has an opening width wide enough for passing through each of the engaging sections and a plurality of guides for helically guiding the engaging sections into the recesses. A helical engagement of the engaging sections and the engaged section completes the drop-guard mechanism.Type: ApplicationFiled: May 18, 2006Publication date: November 30, 2006Inventors: Toshiyuki Nishikata, Koji Kuyama, Hiroshi Ikeno
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Patent number: 7105962Abstract: A brushless motor, comprising a rotor having a magnet, a coil for generating a magnetic field for drivingly rotating the rotor, and a power supply terminal for supplying a power to the coil from outside, wherein all electrical connection parts ranging from the power supply terminal to the end of the coil are connected to each other through welded parts.Type: GrantFiled: July 26, 2001Date of Patent: September 12, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shigeru Yoshida, Kodo Fukuoka, Masafumi Kumoi, Koji Kuyama
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Publication number: 20060087184Abstract: Fluid bearing mechanisms (6a and 6b) are formed between a shaft (2) and a central part (21) of an oil impregnated sintered sleeve (13). The oil impregnated sintered sleeve (13) has such an inner surface formed to be larger in aperture ratio at a thrust support end (23) and a loading end (22) than at a central part (21). With this configuration, it is possible to achieve a brushless motor which can suppress an increase in bearing loss while obtaining necessary bearing stiffness at high rpm.Type: ApplicationFiled: September 27, 2005Publication date: April 27, 2006Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Koji Kuyama, Kumio Masuda, Kinjiro Okinaga
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Publication number: 20060006746Abstract: In a separation preventing mechanism used in a brushless motor, an insertion section is formed into a separation preventing member (5) using resin, which has a form difficult to shape with a metal pressed part, and to which a latching member (4) can be inserted by combining rotation and shaft-direction insertion, making it easy to disassemble it after assembly and size adjustment.Type: ApplicationFiled: July 6, 2005Publication date: January 12, 2006Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Toshiyuki Nishikata, Koji Kuyama, Kinjiro Okinaga, Kumio Masuda, Hiroshi Ikeno, Tsuyoshi Kanou
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Patent number: 6713914Abstract: A motor includes a motor-base-holder which comprises (a) a base, (b) a bearing supporter vertically protruded from the base for supporting a bearing, (c) a stator supporter concentric with the bearing supporter for being mounted with a stator, (d) a motor base having terminals made of a metal plate and insert-molded around the bearing supporter, and (e) a frame made of the same metal as the terminals and linked to fringe of the motor base. This structure solves difficulties of mini-motors such as difficulties of handling the motor, difficulties of mating those elements each other, and time-consuming bonding action. A method of assembling the same motor achieves high productivity.Type: GrantFiled: January 25, 2002Date of Patent: March 30, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shigeru Yoshida, Kodo Fukuoka, Koji Kuyama
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Patent number: 6710481Abstract: A motor includes a motor-base-holder having (a) a base, (b) a bearing supporter vertically protruded from the base for supporting a bearing, (c) a stator supporter concentric with the bearing supporter for being mounted with a stator, (d) a motor base having terminals made of a metal plate and insert-molded around the bearing supporter, and (e) a frame made of the same metal as the terminals and linked to fringe of the motor base. This structure solves difficulties of mini-motors such as difficulties of handling the motor, difficulties of mating those elements each other, and time-consuming bonding action. A method of assembling the same motor achieves high productivity.Type: GrantFiled: January 25, 2002Date of Patent: March 23, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shigeru Yoshida, Kodo Fukuoka, Koji Kuyama
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Patent number: 6664676Abstract: A motor includes a surface mountable motor base having (a) a base, (b) a bearing supporter extending from the base for supporting a bearing, (c) a stator supporter concentric with the bearing supporter for supporting a stator, and (d) a terminal for connection to a winding of the stator, the terminal exposed on a bottom of the motor base and extending substantially parallel to the base. This structure solves difficulties of mini-motors such as difficulties of handling the motor, difficulties of mating those elements with each other, and time-consuming bonding. A method of assembling the same motor achieves high productivity.Type: GrantFiled: September 28, 2000Date of Patent: December 16, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shigeru Yoshida, Kodo Fukuoka, Koji Kuyama
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Patent number: D636863Type: GrantFiled: August 20, 2010Date of Patent: April 26, 2011Assignee: Panasonic CorporationInventors: Mineaki Isoda, Koji Kuyama, Yasushi Kamada, Masahito Hidaka, Kinjirou Okinaga