Patents by Inventor Koichi Nagano
Koichi Nagano 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: 7837393Abstract: A self-aligning roller bearing is provided which includes an inner ring having a double-row raceway, an outer ring having a double-row integral and spherical raceway, a plurality of rollers incorporated between the inner ring raceway and the outer ring raceway on a double-row basis, and a retainer for rotatably retaining the rollers. Processing marks crossing each other are formed on a raceway surface of the spherical raceway of the outer ring. The processing marks are cut substantially straightly at a predetermined crossing angle to the circumferential direction of the raceway surface. The surface roughness of the raceway surface is substantially constant in the axial direction and the circumferential direction thereof at least in a part in contact with the roller.Type: GrantFiled: September 17, 2004Date of Patent: November 23, 2010Assignee: NSK Ltd.Inventors: Kazumi Matsuzaki, Toshio Ueda, Koichi Nagano, Atsushi Yamanoue
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Patent number: 7321620Abstract: The present invention provides an equalizer capable of accurately compensating for non-linearity of an input signal due to the asymmetry phenomenon, etc., during the disk production process. Two tap coefficients are provided in a coefficient unit. A comparator compares the value of a middle tap signal, which is a reference signal, and a threshold, so as to produce a selection signal based on the comparison result. The coefficient unit selects one of the two tap coefficients as the selected tap coefficient based on the selection signal, and a tap signal is multiplied with the selected tap coefficient. Thus, it is possible to adaptively switch the tap coefficients of the equalizer as a whole based on the value of the middle tap signal, which is the reference signal. Therefore, it is possible to accurately compensate for the non-linearity of the input signal.Type: GrantFiled: March 10, 2003Date of Patent: January 22, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroyuki Nakahira, Koichi Nagano, Koji Okamoto, Akira Yamamoto
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Publication number: 20070081753Abstract: A self-aligning roller bearing is provided which includes an inner ring having a double-row raceway, an outer ring having a double-row integral and spherical raceway, a plurality of rollers incorporated between the inner ring raceway and the outer ring raceway on a double-row basis, and a retainer for rotatably retaining the rollers. Processing marks crossing each other are formed on a raceway surface of the spherical raceway of the outer ring. The processing marks are cut substantially straightly at a predetermined crossing angle to the circumferential direction of the raceway surface. The surface roughness of the raceway surface is substantially constant in the axial direction and the circumferential direction thereof at least in a part in contact with the roller.Type: ApplicationFiled: September 17, 2004Publication date: April 12, 2007Inventors: Kazumi Matsuzaki, Toshio Ueda, Koichi Nagano, Atsushi Yamanoue
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Publication number: 20060242836Abstract: A manufacturing apparatus for the race for a thin cross-section rolling bearing from a heat-treated pipe-shaped material W with a rib section 1 at one end thereof comprises a first spindle 11 having a clamping jig 14 to clamp the rib section 1, and a chuck 12 to securely hold the clamping jig 14; a machining unit 23 to process the pipe-shaped material W to form an annular member 10 via turning and/or grinding steps; and a second spindle 28 to retain the annular member, which has been cut off from the rest of the pipe-shaped material W, so that the end face of the annular member is subjected to turning and/or grinding steps, whereby the precision in roundness and uniformity in material thickness of the race is improved.Type: ApplicationFiled: June 30, 2006Publication date: November 2, 2006Inventor: Koichi Nagano
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Publication number: 20060242837Abstract: A manufacturing apparatus for the race for a thin cross-section rolling bearing from a heat-treated pipe-shaped material W with a rib section 1 at one end thereof comprises a first spindle 11 having a clamping jig 14 to clamp the rib section 1, and a chuck 12 to securely hold the clamping jig 14; a machining unit 23 to process the pipe-shaped material W to form an annular member 10 via turning and/or grinding steps; and a second spindle 28 to retain the annular member, which has been cut off from the rest of the pipe-shaped material W, so that the end face of the annular member is subjected to turning and/or grinding steps, whereby the precision in roundness and uniformity in material thickness of the race is improved.Type: ApplicationFiled: June 30, 2006Publication date: November 2, 2006Inventor: Koichi Nagano
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Patent number: 6895348Abstract: An unusual waveform detection circuit is a digital-type unusual waveform detection circuit that arbitrarily sets a threshold used for determining an unusual waveform and produces an unusual waveform determination signal by comparing an input signal with the threshold. In producing the unusual waveform determination signal, one of a configuration where a voltage at each of all sampling points is compared with a reference voltage and a configuration where a continuously changing gradient of signal waveform peaks is calculated and is compared with a reference gradient is selectively employed. The unusual waveform detection circuit can easily and accurately detect various unusual waveforms.Type: GrantFiled: January 10, 2003Date of Patent: May 17, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akira Kawabe, Koichi Nagano
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Publication number: 20040207550Abstract: A parallel A/D converter includes: a reference-voltage generation circuit for outputting m reference voltages (“m” is an integer of not less than two), each having different voltage values, in response to the bit precision of digital output signals; n comparators (“n” is an integer smaller than “m”); and an encoder for encoding outputs of the n comparators to output the digital output signals. Each of the n comparators compares the magnitude of one of the m reference voltages with that of an analog input signal. Thereby, power consumption can be reduced.Type: ApplicationFiled: April 18, 2003Publication date: October 21, 2004Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventor: Koichi Nagano
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Patent number: 6798370Abstract: A parallel A/D converter includes: a reference-voltage generation circuit for outputting m reference voltages (“m” is an integer of not less than two), each having different voltage values, in response to the bit precision of digital output signals; n comparators (“n” is an integer smaller than “m”); and an encoder for encoding outputs of the n comparators to output the digital output signals. Each of the n comparators compares the magnitude of one of the m reference voltages with that of an analog input signal. Thereby, power consumption can be reduced.Type: GrantFiled: April 18, 2003Date of Patent: September 28, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Koichi Nagano
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Publication number: 20040123464Abstract: A manufacturing apparatus for the race for a thin cross-section rolling bearing from a heat-treated pipe-shaped material W with a rib section 1 at one end thereof comprises a first spindle 11 having a clamping jig 14 to clamp the rib section 1, and a chuck 12 to securely hold the clamping jig 14; a machining unit 23 to process the pipe-shaped material W to form an annular member 10 via turning and/or grinding steps; and a second spindle 28 to retain the annular member, which has been cut off from the rest of the pipe-shaped material W, so that the end face of the annular member is subjected to turning and/or grinding steps, whereby the precision in roundness and uniformity in material thickness of the race is improved.Type: ApplicationFiled: November 5, 2003Publication date: July 1, 2004Applicant: NSK Ltd.Inventor: Koichi Nagano
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Publication number: 20030185291Abstract: The present invention provides an equalizer capable of accurately compensating for non-linearity of an input signal due to the asymmetry phenomenon, etc., during the disk production process. Two tap coefficients are provided in a coefficient unit. A comparator compares the value of a middle tap signal, which is a reference signal, and a threshold, so as to produce a selection signal based on the comparison result. The coefficient unit selects one of the two tap coefficients as the selected tap coefficient based on the selection signal, and a tap signal is multiplied with the selected tap coefficient. Thus, it is possible to adaptively switch the tap coefficients of the equalizer as a whole based on the value of the middle tap signal, which is the reference signal. Therefore, it is possible to accurately compensate for the non-linearity of the input signal.Type: ApplicationFiled: March 10, 2003Publication date: October 2, 2003Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Hiroyuki Nakahira, Koichi Nagano, Koji Okamoto, Akira Yamamoto
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Publication number: 20030141997Abstract: An unusual waveform detection circuit of the present invention is a digital-type unusual waveform detection circuit that arbitrarily sets a threshold used for determining an unusual waveform and produces an unusual waveform determination signal by comparing an input signal with the threshold. In producing the unusual waveform determination signal, one of a configuration where a voltage at each of all sampling points is compared with a reference voltage and a configuration where a continuously changing gradient of signal waveform peaks is calculated and is compared with a reference gradient is selectively employed. The unusual waveform detection circuit can easily and accurately detect various unusual waveforms.Type: ApplicationFiled: January 10, 2003Publication date: July 31, 2003Inventors: Akira Kawabe, Koichi Nagano
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Patent number: 5669126Abstract: A terminal for a piezoelectric device has a first electrode portion, a second electrode portion folded on the first electrode portion, projections on the first and second electrode portions, and further a vibration absorber between the first and second electrode portions. As the vibration absorber, oil, a non-volatile component of oil, silicone grease, polyamide resin, paper, an anticorrosive, a coating agent, silicone rubber, etc. may be used. Another terminal for a piezoelectric device has a sealant between the first electrode portion and the second electrode portion.Type: GrantFiled: September 5, 1995Date of Patent: September 23, 1997Assignee: Murata Manufacturing Co., Ltd.Inventors: Koichi Nagano, Atsushi Uno, Toshiyuki Baba, Takashi Shimura, Yuusei Oyama
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Patent number: 5616981Abstract: A terminal for a piezoelectric device has a first electrode portion, a second electrode portion folded on the first electrode portion, projections on the first and second electrode portions, and further a vibration absorber between the first and second electrode portions. As the vibration absorber, oil, a non-volatile component of oil, silicone grease, polyamide resin, paper, an anticorrosive, a coating agent, silicone rubber, etc. may be used. Another terminal for a piezoelectric device has a sealant between the first electrode portion and the second electrode portion.Type: GrantFiled: August 16, 1994Date of Patent: April 1, 1997Assignee: Murata Manufacturing Co., Ltd.Inventors: Koichi Nagano, Atsushi Uno, Toshiyuki Baba, Takashi Shimura, Yuusei Oyama
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Patent number: 5606284Abstract: A variable gain amplifying circuit is controlled by a control voltage Vc from which a high-frequency component has been removed. To provide the control voltage Vc, a holding circuit smoothes the higher one of an output voltage of the variable gain amplifying circuit, which has been rectified by a rectifying circuit, and a voltage detected by a minute voltage detecting circuit, so that the control voltage Vc is obtained via a direct-current amplifying circuit. Since the clamping circuit varies the control voltage Vc based on a reference voltage Vref on receiving a minute input signal, even when an AGC characteristic is changed by varying the reference voltage Vref, the minimum gain is always corrected to be constant.Type: GrantFiled: August 24, 1995Date of Patent: February 25, 1997Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazuhiko Tamesue, Koichi Nagano, Masuo Nakamura
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Patent number: 5599085Abstract: An inventive headlight and a method for controlling a light distribution of the headlight of a motorcycle effectively eliminating the problem of a deteriorated light distribution pattern of a conventional headlight that becomes apparent typically when the motorcycle is tilted to maneuver the motorcycle along a curved road. A headlight 1 comprises a mirror reflector 3 divided into an upper left movable section 32, an upper right movable section 33 provided with respective pivots 32a and 33a. When the motorcycle is tilted, the tilted or lowered one of the movable sections 32 and 33 is driven to turn upward by a corresponding solenoid type driving unit 5 according to a tilt sensor 22 to face the forward of the moving motorcycle and produce a light 5 distribution pattern aligned with the direction along which the motorcycle moves so that any possible deterioration in the light distribution pattern can be effectively corrected.Type: GrantFiled: December 23, 1994Date of Patent: February 4, 1997Assignees: Honda Giken Kogyo Kabushiki Kaisha, Stanley Electric Co., Ltd.Inventors: Hajime Tabata, Tetsuya Suzuki, Yoshihisa Hirose, Koichi Nagano, Masaaki Furubayashi, Tadashi Nomura
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Patent number: 5565824Abstract: A ladder filter includes two piezoelectric resonators which operate in a stretch vibration mode and stacked on top of each other with a grounding terminal located therebetween. Two piezoelectric resonators which operate in a length vibrating mode are provided at both sides of the piezoelectric resonators which operate in a stretch vibration mode.Type: GrantFiled: February 24, 1995Date of Patent: October 15, 1996Assignee: Murata Manufacturing Co., Ltd.Inventor: Koichi Nagano
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Patent number: 5306759Abstract: A coating composition prepared by adding 0 to 150 parts by weight, in terms of diorganosilane, of a hydrolyzate and/or a partial condensate of an diorganosilane (b), 2 to 300 parts by weight of a vinyl resin containing a silyl group (c), 0.01 to 50 parts by weight of a metal chelate compound (d), and an organic solvent (e), to 100 parts by weight in terms of organosilane of a hydrolyzate and/or a partial condensate of an organosilane (a), to which are added two or more mols of a type of .beta.-diketone and/or .beta.-ketoester (f) for one mol of the metal chelate compound (d).Type: GrantFiled: February 11, 1993Date of Patent: April 26, 1994Assignee: Japan Synthetic Rubber Co., Ltd.Inventors: Toshinori Sakagami, Koichi Nagano, Tomonobu Shimizu, Kinji Yamada
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Patent number: 5274529Abstract: An electronic device has terminals and other elements such as piezoelectric elements enclosed inside a box-shaped molded case. One of the terminals which penetrates and fixed to a side wall of the case has one or more raised contact portions for making electrical contact with one of the enclosed elements. Tabs protruding higher than these raised contact portions are provided to this terminal for preventing resin from entering the interior of the case during its molding process. These tabs are fixed to the wall of the case. Externally protruding contacting portions of the terminals are bent toward a bottom wall of the case which is larger than the side wall such that the device can be stably mounted.Type: GrantFiled: August 28, 1992Date of Patent: December 28, 1993Assignee: Murata Manufacturing Co., Ltd.Inventors: Hideo Mura, Koichi Nagano, Toshikazu Ishiguro
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Patent number: 5272595Abstract: A terminal structure for an electronic device, which can be affixed to a resin case while the latter is being molded, has planar base member having a raised portion at least on one of its surfaces. A protruding piece is provided on the same surface so as to protrude therefrom higher than the raised portion. This protruding piece may be a tab which is cut out from the base member and bent therefrom, or another planar plate which overlaps the base member.Type: GrantFiled: December 29, 1992Date of Patent: December 21, 1993Assignee: Murata Manufacturing Co., Ltd.Inventors: Hideo Mura, Koichi Nagano, Toshikazu Ishiguro
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Patent number: 5161875Abstract: To correct variation of a property of light orientation induced by inclination of a vehicle body during a cornering operation, a projector type cornering head lamp including an inclination sensor further includes correcting means. When the correcting means is mechanically constructed, it comprises a pair of opening portions formed on a light shielding plate, shutters for closing the opening portions therewith and solenoids for pulling the shutter downwardly in response to an output from the inclination sensor. When the correcting means is electrically constructed, it is constituted by a circular liquid crystal element preferably comprising a supertwistnematic liquid crystal and serving also as a light shielding plate.Type: GrantFiled: August 22, 1991Date of Patent: November 10, 1992Assignee: Stanley Electric Company, Ltd.Inventors: Tsuneo Sekiguchi, Koichi Nagano, Satoru Suzuki