Patents by Inventor Hideki Nihei
Hideki Nihei 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: 8950768Abstract: An air cellular cushion according to one aspect of the present disclosure includes: a plurality of air cells; a sensor configured to detect an air cell collapsing to a bottom; a parameter measuring unit configured to measure a parameter indicating a collapse state of the air cell collapsing to the bottom; an indicator configured to output an indication; and a control unit configured to change the indication output from the indicator based on a parameter value measured by the parameter measuring unit.Type: GrantFiled: September 8, 2011Date of Patent: February 10, 2015Assignee: The Yokohama Rubber Company, LimitedInventor: Hideki Nihei
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Patent number: 8207694Abstract: When the torque command value is zero, a set point of DC current for an inverter is calculated to obtain a difference between the set point and a detected DC current so that an error in magnetic pole position may be estimated and corrected. By correcting the magnetic pole position, unwanted power running and regenerative torque of the motor can be avoided and unnecessary charge or discharge to or from a battery can be prevented.Type: GrantFiled: August 19, 2009Date of Patent: June 26, 2012Assignee: Hitachi, Ltd.Inventors: Shiho Izumi, Satoru Kaneko, Hideki Nihei
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Publication number: 20120061943Abstract: An air cellular cushion according to one aspect of the present disclosure includes: a plurality of air cells; a sensor configured to detect an air cell collapsing to a bottom; a parameter measuring unit configured to measure a parameter indicating a collapse state of the air cell collapsing to the bottom; an indicator configured to output an indication; and a control unit configured to change the indication output from the indicator based on a parameter value measured by the parameter measuring unit.Type: ApplicationFiled: September 8, 2011Publication date: March 15, 2012Inventor: Hideki Nihei
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Patent number: 8040010Abstract: The present invention comprises a stator, and a rotor which is disposed oppositely to the stator with a gap interposed. The stator comprises a stator core, and a distributed stator winding mounted to the stator core. The stator core comprises a ring-like yoke core, and a plurality of teeth cores which protrude from the yoke core in the radial direction. The rotor comprises a rotor core, and a plurality of permanent magnets embedded in the rotor core. A pair of non-magnetic portions is created inside the rotor core and on both sides of the circumferential width of a permanent magnet for one magnetic pole. In the rotor core located on the stator side of the pair of non-magnetic portions, a pair of magnetic paths is created as the result of the creation of the pair of non-magnetic portions. Furthermore, a groove or hole is created on the outer circumferential portion of the rotor core and between the adjacent magnetic poles.Type: GrantFiled: February 18, 2009Date of Patent: October 18, 2011Assignee: Hitachi, Ltd.Inventors: Akinori Kamiya, Noriaki Hino, Fumio Tajima, Tsutomu Miyoshi, Hideki Nihei
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Patent number: 8024828Abstract: An object of the present invention is to provide an air cell which is capable of detecting that the upper end side and the lower end side of the air bag are nearer than a predetermined distance. This air cell has an air bag, a base member to which the lower end portion of the air bag is attached, an air chamber AR configured by the air bag and the upper surface of the base member, a thin film portion which forms the bottom surface of the air chamber and capable of deforming elastically in the up-and-down direction, an extending member configured to extend upwardly from the upper surface of the thin film portion, detecting means which is provided under the thin film portion and which detects downward deformation of the thin film portion.Type: GrantFiled: August 30, 2007Date of Patent: September 27, 2011Assignees: The Yokohama Rubber Co., Ltd., The University of TokyoInventors: Hideki Nihei, Toshimitsu Ebinuma, Hajime Satoh, Hiromi Sanada
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Publication number: 20100205745Abstract: An object of the present invention is to provide an air cell which is capable of detecting that the upper end side and the lower end side of the air bag are nearer than a predetermined distance. This air cell has a air bag, a base member to which the lower end portion of the air bag is attached, a air chamber AR configured by the air bag and the upper surface of the base member, a thin film portion which forms the bottom surface of the air chamber and capable of deforming elastically in the up-and-down direction, an extending member configured to extend upwardly from the upper surface of the shin film, detecting means which is provided under the thin film portion and which detects downward deformation of the thin film portion.Type: ApplicationFiled: August 30, 2007Publication date: August 19, 2010Applicants: The Yokohama Rubber Co., Ltd., The University of TokyoInventors: Hideki Nihei, Toshimitsu Ebinuma, Hajime Satoh, Hiromi Sanada
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Patent number: 7701326Abstract: A tire information transmitter measures ambient information in a tire cavity region including at least pressure to wirelessly transmit to outside the tire cavity region. The tire transmitter comprises: a sensor unit having a pressure sensor for measuring a pressure in the tire cavity region; a control unit for comparing a level of a pressure signal representing pressure measured by the sensor unit with a threshold value and for generating an operation signal indicating that the tire information transmitter is operating; and a transmitting unit for wirelessly transmitting the pressure signal or the operation signal.Type: GrantFiled: February 19, 2008Date of Patent: April 20, 2010Assignee: The Yokohama Rubber Co., Ltd.Inventors: Koji Nakatani, Toshimitsu Ebinuma, Hideki Nihei
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Publication number: 20100052581Abstract: When the torque command value is zero, a set point of DC current for an inverter is calculated to obtain a difference between the set point and a detected DC current so that an error in magnetic pole position may be estimated and corrected. By correcting the magnetic pole position, unwanted power running and regenerative torque of the motor can be avoided and unnecessary charge or discharge to or from a battery can be prevented.Type: ApplicationFiled: August 19, 2009Publication date: March 4, 2010Inventors: Shiho IZUMI, Satoru Kaneko, Hideki Nihei
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Publication number: 20090230802Abstract: The present invention comprises a stator, and a rotor which is disposed oppositely to the stator with a gap interposed. The stator comprises a stator core, and a distributed stator winding mounted to the stator core. The stator core comprises a ring-like yoke core, and a plurality of teeth cores which protrude from the yoke core in the radial direction. The rotor comprises a rotor core, and a plurality of permanent magnets embedded in the rotor core. A pair of non-magnetic portions is created inside the rotor core and on both sides of the circumferential width of a permanent magnet for one magnetic pole. In the rotor core located on the stator side of the pair of non-magnetic portions, a pair of magnetic paths is created as the result of the creation of the pair of non-magnetic portions. Furthermore, a groove or hole is created on the outer circumferential portion of the rotor core and between the adjacent magnetic poles.Type: ApplicationFiled: February 18, 2009Publication date: September 17, 2009Inventors: Akinori Kamiya, Noriaki Hino, Fumio Tajima, Tsutomu Miyoshi, Hideki Nihei
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Patent number: 7577500Abstract: A wheel information-acquiring system (10) sends wheel information, such as a tire inner pressure, together with preset identification information from a transmitter provided on a wheel installed on a motor vehicle and causes a receiver to receive the transmitted information. In the wheel information-acquiring system, a setting device (60) transmits by wireless an ID, which the setting device is causing a transmitter (16a) to set, to the transmitter (16a) and causes the transmitter (16a) to set the ID. The setting device then transmits by wireless this ID and wheel installation position information, which is separately set and input, to the receiver, causing the receiver to map the ID and the wheel installation position information and then set and register the result of the mapping. The setting device also can acquire an ID unique to the transmitter (16a) and transmit the ID and wheel installation position information to the receiver.Type: GrantFiled: April 14, 2004Date of Patent: August 18, 2009Assignee: The Yokohama Rubber Co., Ltd.Inventors: Hideki Nihei, Toshimitsu Ebinuma, Takahide Kitami, Tomohiro Maruyama
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Publication number: 20090102633Abstract: A tire information transmitter is mounted in a tire cavity region surrounded by a tire inner circumference surface and a wheel wall surface and senses atmospheric information in the tire cavity region to wirelessly transmit to outside the tire cavity region. The transmitter has a sensor for sensing atmospheric information in the tire cavity region, a circuit board having a processing circuit for processing a sensed signal from the sensor and having a transmitting circuit for wirelessly transmitting a processed signal and a battery for supplying power for driving the circuits. The battery is made as an encapsulated body of a thin plate shape, having a thin plate surface, by encapsulating battery components with an insulation film, and the encapsulated body has an area ratio of the thin plate surface to a thickness of the thin plate shape of not less than 200 mm, and a mass of not more than 5 g. A tire information acquiring system has the transmitter and a receiver for receiving a signal from the transmitter.Type: ApplicationFiled: June 29, 2005Publication date: April 23, 2009Applicants: The Yokohama Rubber Co., Ltd., Sony CorporationInventors: Toshimitsu Ebinuma, Takahide Titami, Koji Nakatani, Hideki Nihei, Norishige Yamaguchi, Hiroyuki Morita
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Publication number: 20080211650Abstract: A tire information transmitter measures ambient information in a tire cavity region including at least pressure to wirelessly transmit to outside the tire cavity region. The tire transmitter comprises: a sensor unit having a pressure sensor for measuring a pressure in the tire cavity region; a control unit for comparing a level of a pressure signal representing pressure measured by the sensor unit with a threshold value and for generating an operation signal indicating that the tire information transmitter is operating; and a transmitting unit for wirelessly transmitting the pressure signal or the operation signal.Type: ApplicationFiled: February 19, 2008Publication date: September 4, 2008Applicant: THE YOKOHAMA RUBBER CO., LTD.Inventors: Koji Nakatani, Toshimitsu Ebinuma, Hideki Nihei
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Patent number: 7348879Abstract: A tire information transmitter measures tire inflation pressure in a tire cavity region and wirelessly transmits it outside the tire cavity region. A control unit of the transmitter controls the transmitting of the measured pressure and compares the level of the pressure signal with a threshold value continually after a supply of driving power is started. The transmitter has a comparing mode in which the operation signal is transmitted at a first time interval, and a transmitting mode in which the pressure signal is transmitted at a second time interval, which is shorter than the first time interval. Further, the control unit irreversibly shifts from the comparing mode to the transmitting mode, once the level of the pressure signal exceeds the threshold value as a result of the comparing.Type: GrantFiled: February 14, 2006Date of Patent: March 25, 2008Assignee: The Yokohama Rubber Co., Ltd.Inventors: Koji Nakatani, Toshimitsu Ebinuma, Hideki Nihei
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Publication number: 20070055411Abstract: A wheel information-acquiring system (10) sends wheel information, such as a tire inner pressure, together with preset identification information from a transmitter provided on a wheel installed on a motor vehicle and causes a receiver to receive the transmitted information. In the wheel information-acquiring system, a setting device (60) transmits by wireless an ID, which the setting device is causing a transmitter (16a) to set, to the transmitter (16a) and causes the transmitter (16a) to set the ID. The setting device then transmits by wireless this ID and wheel installation position information, which is separately set and input, to the receiver, causing the receiver to map the ID and the wheel installation position information and then set and register the result of the mapping. The setting device also can acquire an ID unique to the transmitter (16a) and transmit the ID and wheel installation position information to the receiver.Type: ApplicationFiled: April 14, 2004Publication date: March 8, 2007Inventors: Hideki Nihei, Toshimitsu Ebinuma, Takahide Kitami, Tomohiro Maruyama
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Publication number: 20060232391Abstract: A tire information transmitter measures tire inflation pressure in a tire cavity region and wirelessly transmits it outside the tire cavity region. A control unit of the transmitter controls the transmitting of the measured pressure and compares the level of the pressure signal with a threshold value continually after a supply of driving power is started. The transmitter has a comparing mode in which the operation signal is transmitted at a first time interval, and a transmitting mode in which the pressure signal is transmitted at a second time interval, which is shorter than the first time interval. Further, the control unit irreversibly shifts from the comparing mode to the transmitting mode, once the level of the pressure signal exceeds the threshold value as a result of the comparing.Type: ApplicationFiled: February 14, 2006Publication date: October 19, 2006Applicant: The Yokohama Rubber Co., Ltd.Inventors: Koji Nakatani, Toshimitsu Ebinuma, Hideki Nihei
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Patent number: 7104363Abstract: An elevator having a power feeding apparatus effective for reducing the installation space for the elevator is disclosed. The dimension of the power transmission part disposed at the hoist way and the dimension of the power receiving part mounted on the counter weight, each measured in the direction along which the counter weight moves are made different from each other.Type: GrantFiled: October 5, 2001Date of Patent: September 12, 2006Inventors: Kazuhisa Mori, Kouki Yamamoto, Hideki Ayano, Ikuo Yamato, Hiromi Inaba, Hirokazu Nagura, Hideki Nihei
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Publication number: 20020112924Abstract: An elevator having a power feeding apparatus effective for reducing the installation space for the elevator is disclosed.Type: ApplicationFiled: October 5, 2001Publication date: August 22, 2002Applicant: Hitachi Ltd.Inventors: Kazuhisa Mori, Kouki Yamamoto, Hideki Ayano, Ikuo Yamato, Hiromi Inaba, Hirokazu Nagura, Hideki Nihei
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Patent number: 6382361Abstract: An elevator system in which an elevator-car and a counter weight are suspended on a pulley system in a hoistway. The elevator system includes a receiving unit for receiving an electric power from a feeding unit provided in the hoistway, an inverter for converting the received electric power into ac power, a motor connected to an ac side of the inverter for driving the counter weight in up and down directions, a sensor for detecting a position of the receiving unit, and a control unit for controlling an inverter on the basis of the position detected by the position sensor. The counter weight carries the receiving means, the inverter, and the motor.Type: GrantFiled: December 11, 2000Date of Patent: May 7, 2002Assignee: Hitachi, Ltd.Inventors: Hideki Nihei, Hiroshi Nagase, Hiromi Inaba, Toshiyuki Tadokoro
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Publication number: 20010004033Abstract: An elevator in which an elevator-car and a counter weight are hung like a draw well. The elevator includes a receiving unit for receiving an electric power from a feeding unit provided in a hoistway, an inverter for converting the received electric power into ac power, a motor connected to an ac side of the inverter, for driving the counter weight in up and down directions, a sensor for detecting a position of a receiving unit, and a control unit for controlling an inverter on the basis of the position detected by the position sensor. The counter weight has the receiving means, the inverter, and the motor.Type: ApplicationFiled: December 11, 2000Publication date: June 21, 2001Inventors: Hideki Nihei, Hiroshi Nagase, Hiromi Inaba, Toshiyuki Tadokoro
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Patent number: 5453972Abstract: A portable-type disk apparatus for a 3.5-inch or less optical disk implemented in a thin, light-weight and miniaturized structure having a vibration-withstanding capability. An optical head assembly is disposed stationarily while an optical disk and a spindle motor for rotating the optical disk are disposed movably in a diametrical direction of the optical disk. The spindle motor is constituted by a brushless motor of a substantially semi-circular form in cross section and having a laterally truncated portion. The optical head assembly including an optical head and a laser circuit is disposed at the side of the laterally truncated portion.Type: GrantFiled: January 27, 1993Date of Patent: September 26, 1995Assignee: Hitachi, Ltd.Inventors: Hiroshi Kanazawa, Fumio Tajima, Ryoichi Naganuma, Nobuyoshi Mutoh, Tadashi Takahashi, Hideki Nihei, Shunichi Tanae, Hideaki Horie, Syooichi Kawamata