Patents by Inventor Hideyuki Murakami
Hideyuki Murakami 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).
-
Patent number: 9435647Abstract: An angular velocity sensor including a vibration body having a sensor electrode, a driving electrode, and a monitor electrode. The monitor electrode generates a signal according to vibration of the vibration body. The sensor circuit outputs a signal representing an angular velocity applied to the vibration body. The amplitude determination circuit measures amplitude of vibration of the vibration body. A PLL circuit includes a constant voltage source for generating a constant voltage, a timing switching unit for outputting a voltage by switching selectively between the constant voltage and a voltage corresponding to the monitor signal, and a voltage-controlled oscillator for outputting an oscillation signal having a frequency corresponding to the voltage output from the timing switching unit. When the amplitude measured is smaller than a predetermined value, the timing switching unit outputs the constant voltage output from the constant voltage source and outputs a start-up mode signal.Type: GrantFiled: October 7, 2010Date of Patent: September 6, 2016Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Hideyuki Murakami, Takashi Kawai, Masaki Nakamura
-
Patent number: 9392171Abstract: A motion sensor includes a sensor element that outputs a sense signal in response to a motion applied thereto and a sensor circuit that senses the motion based on the sense signal. The sensor circuit includes a sensor-element-signal amplifier that receives the sense signal. The sensor-element-signal amplifier operates switchably between at a normal mode and at a low-noise mode that consumes a larger electric power and produces a smaller noise than the normal mode. This motion sensor senses a small motion and a large motion accurately.Type: GrantFiled: April 10, 2013Date of Patent: July 12, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takeshi Uemura, Hideyuki Murakami, Shinjiro Ueda, Ryota Sudo
-
Publication number: 20160187136Abstract: A physical-quantity sensor is configured to be used with a physical-quantity sensor element that outputs a sensor signal in response to a physical quantity. A physical-quantity detection circuit of the physical-quantity sensor includes a signal generating unit for generating a detecting signal and a multiplier that multiplies the sensor signal by the detecting signal. The signal generating unit converts a first phase of a predetermined signal having a frequency corresponding to a frequency of the sensor signal, into a second phase, and calculates an amplitude value corresponding to the second phase as to generate the detecting signal. This physical-quantity sensor improves accuracy of phase adjustment without increasing a sampling frequency.Type: ApplicationFiled: October 23, 2014Publication date: June 30, 2016Inventors: HIDEYUKI MURAKAMI, TAKASHI KAWAI
-
Publication number: 20160168661Abstract: A thermal barrier-coated Ni alloy component includes: a substrate made of a Ni alloy containing Al; an intermediate layer formed on a surface of the substrate; and a thermal barrier layer made of a ceramic and formed on a surface of the intermediate layer. The intermediate layer includes a ?? layer, which is formed from a ??-Ni3Al phase on the surface on the thermal barrier layer side, and contains Pt.Type: ApplicationFiled: February 24, 2016Publication date: June 16, 2016Applicants: IHI Corporation, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Hiroki YOSHIZAWA, Akira Tateno, Akihiro Sato, Kota Sasaki, Masato Ishida, Yoshito Yasui, Hideyuki Murakami, Hiromichi Murakami
-
Publication number: 20150354706Abstract: Disclosed is a lip seal for water pump made of a rubber-like elastic material, fixed to a housing as a fixed side and in sliding contact with a shaft rotating relative to the housing; the lip seal having sliding surface with a surface roughness Ra (according to JIS B0601 corresponding to ISO 4287) of 1 to 30 ?m, being obtained by vulcanization-molding of a rubber composition comprising 100 parts by weight of the rubber-like elastic material, 1 to 150 parts by weight of a reinforcing filler, 5 to 90 parts by weight of a non-reinforcing filler having an average particle diameter of 1 ?m or more, 0.1 to 5 parts by weight of a coupling agent, 1 to 15 parts by weight of a co-crosslinking agent, and 0.5 to 10 parts by weight of an organic peroxide. The lip seal effects to prevent softening and volume swelling of the rubber-like elastic material and furthermore the generation of deposits in the rotating shaft, which are problematic for rotation torque and LLC resistance.Type: ApplicationFiled: February 17, 2014Publication date: December 10, 2015Applicant: Eagle Industry Co., Ltd.Inventors: Takuya Yamanaka, Suguru Yoshida, Masafumi Kato, Hideyuki Murakami
-
Patent number: 9174416Abstract: A mixed powder of an Ni—Al alloy and alumina is produced by heating a first mixed powder, which is prepared by mixing an Ni—Al mixed powder as prepared by mixing an Al powder with Ni in such a manner that Al therein could fall within a range of from 25 atomic % to 60 atomic %, and an alumina powder in a range of from 40% by mass to 60% by mass, in vacuum or in an inert gas atmosphere at a temperature falling within a range of from 600° C. to 1300° C. for at least 1 hour, and then grinding the resulting product.Type: GrantFiled: March 27, 2013Date of Patent: November 3, 2015Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Hideyuki Murakami, Daishi Ohtsubo, Yoko Mitarai, Makoto Nanko
-
Publication number: 20150204690Abstract: A physical quantity sensor includes a detection circuit that outputs a detection value indicating a physical quantity applied to a detecting element and a correction processor that corrects the detection value to output a corrected value. The correction processor causes the corrected value to be substantially 0 (zero) if all of conditions that an absolute value of a time-differentiated value of the detection value is not larger than a predetermined differential threshold and that an absolute value of the corrected value is not larger than a predetermined output threshold are satisfied.Type: ApplicationFiled: August 21, 2013Publication date: July 23, 2015Inventors: Sho Shimada, Ryota Sudo, Hideyuki Murakami, Shinjiro Ueda
-
Publication number: 20150077579Abstract: A motion sensor includes a sensor element that outputs a sense signal in response to a motion applied thereto and a sensor circuit that senses the motion based on the sense signal. The sensor circuit includes a sensor-element-signal amplifier that receives the sense signal. The sensor-element-signal amplifier operates switchably between at a normal mode and at a low-noise mode that consumes a larger electric power and produces a smaller noise than the normal mode. This motion sensor senses a small motion and a large motion accurately.Type: ApplicationFiled: April 10, 2013Publication date: March 19, 2015Inventors: Takeshi Uemura, Hideyuki Murakami, Shinjiro Ueda, Ryota Sudo
-
Patent number: 8925383Abstract: An angular velocity sensor includes a vibration body, first and second sensor electrodes generating an electric charge responsive to an angular velocity applied to the vibration body, first and D/A converters each outputting at least two levels of an electric charge, first and second integrator circuits integrating the electric charge generated by the first and second sensor electrodes and the electric charges output from the first and second D/A converters, respectively, a comparator unit comparing output signals from the first and second integrator circuits, first and second D/A switching units switching levels of the output signals from the first and second D/A converters according to a comparison result of the comparator unit, a first disconnection detecting switch connected between the first sensor electrode and the first integrator circuit, a first voltage source for injecting an electric charge into a point between the first sensor electrode and the first integrator circuit via the first disconnectionType: GrantFiled: July 20, 2010Date of Patent: January 6, 2015Assignee: Panasonic CorporationInventors: Hideyuki Murakami, Takashi Kawai, Kouji Nabetani, Takehiko Ogawa
-
Patent number: 8851480Abstract: A lip type seal has a cartridge fitted to an inner periphery of a shaft hole, a first lip seal member, a case, a resin second lip seal member, a backup ring and an adapter, a protrusion section in a partial portion on a circumference is provided in a first flange section of the case to engage with the second lip seal member, whereby the second lip seal member is prevented from whirling with respect to the case and coming off to an inner side in a radial direction, and a projecting section in a partial portion on a circumference is provided in a flange section of the backup ring to engage with the second lip seal member, whereby the second lip seal member is prevented from whirling with respect to the backup ring and coming off to the inner side in the radial direction.Type: GrantFiled: May 11, 2010Date of Patent: October 7, 2014Assignee: Eagle Industry Co., Ltd.Inventors: Koichiro Oiyama, Hideyuki Murakami, Yusaku Nakazono
-
Patent number: 8818636Abstract: The electric power steering apparatus is provided with: a steering torque detector that detects steering torque of a steering wheel; an electric motor that applies steering assist force to the steering wheel; a current detector that detects an actual current actually supplied to the electric motor; a target current setting unit that sets a target current to be supplied to the electric motor, on the basis of the steering torque detected by the steering torque detector; a feedback controller that performs feedback control so that the target current and the actual current coincide with each other; and a feedforward controller that performs feedforward control for increasing the actual current detected by the current detector if the target current increases, the feedforward controller including a frequency compensator that provides a smaller amount of increase in the actual current as a frequency of a variation in the target current is lower.Type: GrantFiled: July 30, 2012Date of Patent: August 26, 2014Assignee: Showa CorporationInventor: Hideyuki Murakami
-
Publication number: 20140203520Abstract: Disclosed is a lip seal for water pump made of a rubber-like elastic material, fixed to a housing as a fixed side and in sliding contact with a shaft rotating relative to the housing; the lip seal being obtained by vulcanization-molding of a rubber composition comprising 100 parts by weight of the rubber-like elastic material, 1 to 150 parts by weight of a reinforcing filler, 5 to 90 parts by weight of a non-reinforcing filler having an average particle diameter of 1 ?m or more, 0.1 to 5 parts by weight of a coupling agent, 1 to 15 parts by weight of a co-crosslinking agent, and 0.5 to 10 parts by weight of an organic peroxide. The lip seal for water pump provides a materially solution, rather than a structural solution, to prevent softening and volume swelling of the rubber-like elastic material and the generation of deposits in the rotating shaft, which are problematic for rotation torque and LLC resistance.Type: ApplicationFiled: September 4, 2012Publication date: July 24, 2014Applicant: Eagle Industry Co., Ltd.Inventors: Takuya Yamanaka, Suguru Yoshida, Masafumi Kato, Hideyuki Murakami
-
Publication number: 20140191477Abstract: Disclosed is a hydrogenated nitrile rubber composition comprising 100 parts by weight of hydrogenated nitrile rubber having a bound acrylonitrile content of 31 to 50% and an iodine value of 30 mg/100 mg or less, 30 to 300 parts by weight of carbon black having a particle size of 61 nm or more and/or other filler, 0.5 to 30 parts by weight of a polyfunctional unsaturated compound cocrosslinking agent, and 1 to 10 parts by weight of an organic peroxide. The hydrogenated nitrile rubber composition has excellent roll processability and can be suitably used as a vulcanization-molding material for a cup gasket or bellows having excellent LLC resistance used in a water pump mechanical seal.Type: ApplicationFiled: August 3, 2012Publication date: July 10, 2014Inventors: Osamu Kobayashi, Hideyuki Murakami
-
Publication number: 20130216846Abstract: An Ir-based alloy material or Ru-based alloy material containing in Ir or Ru at least one member of Al, Sc, Ti, V, Cr, Mn, Y, Zr, Nb, Mo, Tc, Hf, Ta, W, and Re in such an amount that a precipitation phase is not formed, wherein the Ir-based alloy material or Ru-based alloy material has a surface uniformly covered with an IrAl intermetallic compound film or a RuAl intermetallic compound film.Type: ApplicationFiled: September 8, 2011Publication date: August 22, 2013Inventors: Zebin Bao, Yoko Mitarai, Hideyuki Murakami
-
Patent number: 8451066Abstract: A PLL circuit is provided with an AD converter, a DA converter to which output from the AD converter is inputted, a filter circuit filtering an output signal of the DA converter, a voltage control oscillator outputting a signal of a different frequency in accordance with an output signal from the filter circuit and a frequency divider dividing a signal which the voltage control oscillator outputs. The AD converter operates by a timing signal from the voltage control oscillator and the DA converter outputs an analog signal corresponding to a value which the AD converter outputs by the timing signal outputted from the frequency divider.Type: GrantFiled: November 7, 2008Date of Patent: May 28, 2013Assignee: Panasonic CorporationInventors: Hideyuki Murakami, Takashi Kawai, Kouji Nabetani
-
Publication number: 20120290174Abstract: The electric power steering apparatus is provided with: a steering torque detector that detects steering torque of a steering wheel; an electric motor that applies steering assist force to the steering wheel; a current detector that detects an actual current actually supplied to the electric motor; a target current setting unit that sets a target current to be supplied to the electric motor, on the basis of the steering torque detected by the steering torque detector; a feedback controller that performs feedback control so that the target current and the actual current coincide with each other; and a feedforward controller that performs feedforward control for increasing the actual current detected by the current detector if the target current increases, the feedforward controller including a frequency compensator that provides a smaller amount of increase in the actual current as a frequency of a variation in the target current is lower.Type: ApplicationFiled: July 30, 2012Publication date: November 15, 2012Applicant: Showa CorporationInventor: Hideyuki MURAKAMI
-
Publication number: 20120290176Abstract: The electric power steering apparatus is provided with: a steering torque detector that detects steering torque of a steering wheel; an electric motor that applies steering assist force to the steering wheel; a current detector that detects an actual current actually supplied to the electric motor; a target current setting unit that sets a target current to be supplied to the electric motor, on the basis of the steering torque detected by the steering torque detector; a feedback controller that performs feedback control so that the target current and the actual current coincide with each other; and a feedforward controller that performs feedforward control for increasing the actual current detected by the current detector if the target current increases, the feedforward controller including a frequency compensator that provides a smaller amount of increase in the actual current as a frequency of a variation in the target current is lower.Type: ApplicationFiled: July 30, 2012Publication date: November 15, 2012Applicant: Showa CorporationInventor: Hideyuki MURAKAMI
-
Patent number: 8260500Abstract: The electric power steering apparatus is provided with: a steering torque detector that detects steering torque of a steering wheel; an electric motor that applies steering assist force to the steering wheel; a current detector that detects an actual current actually supplied to the electric motor; a target current setting unit that sets a target current to be supplied to the electric motor, on the basis of the steering torque detected by the steering torque detector; a feedback controller that performs feedback control so that the target current and the actual current coincide with each other; and a feedforward controller that performs feedforward control for increasing the actual current detected by the current detector if the target current increases, the feedforward controller including a frequency compensator that provides a smaller amount of increase in the actual current as a frequency of a variation in the target current is lower.Type: GrantFiled: September 23, 2009Date of Patent: September 4, 2012Assignee: Showa CorporationInventor: Hideyuki Murakami
-
Publication number: 20120191398Abstract: An angular velocity sensor includes a vibration body having a sensor electrode, a driving electrode, and a monitor electrode. The monitor electrode generates a signal according to vibration of the vibration body. The sensor circuit outputs a signal representing an angular velocity applied to the vibration body. The amplitude determination circuit measures amplitude of vibration of the vibration body. A PLL circuit includes a constant voltage source for generating a constant voltage, a timing switching unit for outputting a voltage by switching selectively between the constant voltage and a voltage corresponding to the monitor signal, and a voltage-controlled oscillator for outputting an oscillation signal having a frequency corresponding to the voltage output from the timing switching unit.Type: ApplicationFiled: October 7, 2010Publication date: July 26, 2012Applicant: Panasonic CorporationInventors: Hideyuki Murakami, Takashi Kawai, Masaki Nakamura
-
Publication number: 20120169015Abstract: A lip type seal has a cartridge fitted to an inner periphery of a shaft hole, a first lip seal member, a case, a resin second lip seal member, a backup ring and an adapter, a protrusion section in a partial portion on a circumference is provided in a first flange section of the case to engage with the second lip seal member, whereby the second lip seal member is prevented from whirling with respect to the case and coming off to an inner side in a radial direction, and a projecting section in a partial portion on a circumference is provided in a flange section of the backup ring to engage with the second lip seal member, whereby the second lip seal member is prevented from whirling with respect to the backup ring and coming off to the inner side in the radial direction.Type: ApplicationFiled: May 11, 2010Publication date: July 5, 2012Applicant: EAGLE INDUSTRY CO., LTD.Inventors: Koichiro Oiyama, Hideyuki Murakami, Yusaku Nakazono