Patents by Inventor Hiroyasu Ishikawa
Hiroyasu Ishikawa 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: 10041554Abstract: An engaging projection formed on a back surface of a pressure plate is inserted into an engaging hole formed in an outside shim plate. A flat surface parts of the engaging projection constituting a side surface thereof are opposed to a linear parts of the engaging hole constituting an inner peripheral edge thereof. When the outside shim plate exists at a neutral position with respect to the pressure plate, the flat surface parts and linear parts are slightly inclined with respect to each other. A rotation of the outside shim plate about an axis of a piston based on a rotation force applied from a leading end face of the piston to the outside shim plate is regulated by line contact between the flat surface parts and linear parts.Type: GrantFiled: June 9, 2015Date of Patent: August 7, 2018Assignee: AKEBONO BRAKE INDUSTRY CO., LTD.Inventors: Hiroyasu Ishikawa, Akiyuki Tajima, Kohei Bando
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Publication number: 20170191540Abstract: An engaging projection formed on a back surface of a pressure plate is inserted into an engaging hole formed in an outside shim plate. A flat surface parts of the engaging projection constituting a side surface thereof are opposed to a linear parts of the engaging hole constituting an inner peripheral edge thereof. When the outside shim plate exists at a neutral position with respect to the pressure plate, the flat surface parts and linear parts are slightly inclined with respect to each other. A rotation of the outside shim plate about an axis of a piston based on a rotation force applied from a leading end face of the piston to the outside shim plate is regulated by line contact between the flat surface parts and linear parts.Type: ApplicationFiled: June 9, 2015Publication date: July 6, 2017Inventors: Hiroyasu ISHIKAWA, Akiyuki TAJIMA, Kohei BANDO
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Patent number: 9440626Abstract: There is provided a drum brake type electric parking brake apparatus includes an electric actuator unit, a backing plate and a knuckle. The electric actuator unit includes an electric motor and a decelerator, and expands a gap between one end portions of the brake shoes based on activation of the electric motor. The electric actuator unit is separately provided from the backing plate. The electric actuator unit is arranged at an inner-side surface of the knuckle, and the backing plate is arranged at an outer-side surface of the knuckle. The backing plate and the electric actuator unit are supported and fixed to the knuckle.Type: GrantFiled: December 11, 2012Date of Patent: September 13, 2016Assignee: AKEBONO BRAKE INDUSTRY CO., LTD.Inventors: Hironori Akada, Hiroyasu Ishikawa, Michio Suzuki
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Patent number: 9097300Abstract: A drum brake type electric parking brake apparatus includes an electric actuator unit configured to pull a cable so as to expand an expanding mechanism, a pulling pipe into which the cable is loosely inserted and supported so as to move in an axial direction, a feeding nut supported so as to move in only a rotation direction and provided with a female screw which is engaged with a male screw on the pulling pipe, and a connecting unit connecting a base end of the pulling pipe and a base end of the cable so as to pull the cable in a direction away from the expanding mechanism with the pulling pipe. The base end of the cable is projected from the base end of the pulling pipe which is an end opposite to the expanding mechanism.Type: GrantFiled: July 18, 2013Date of Patent: August 4, 2015Assignee: AKEBONO BRAKE INDUSTRY CO., LTD.Inventors: Hironori Akada, Hiroyasu Ishikawa, Michio Suzuki
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Publication number: 20140027221Abstract: A drum brake type electric parking brake apparatus includes an electric actuator unit configured to pull a cable so as to expand an expanding mechanism, a pulling pipe into which the cable is loosely inserted and supported so as to move in an axial direction, a feeding nut supported so as to move in only a rotation direction and provided with a female screw which is engaged with a male screw on the pulling pipe, and a connecting unit connecting a base end of the pulling pipe and a base end of the cable so as to pull the cable in a direction away from the expanding mechanism with the pulling pipe. The base end of the cable is projected from the base end of the pulling pipe which is an end opposite to the expanding mechanism.Type: ApplicationFiled: July 18, 2013Publication date: January 30, 2014Inventors: Hironori AKADA, Hiroyasu ISHIKAWA, Michio SUZUKI
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Publication number: 20120205209Abstract: A joining link, a strut, and first and second expansion levers constitute an expansion and contraction device. At the time of the braking, the proximal end portion of both of the expansion levers are mutually pressed from the opposite sides by first and second pressing members constituting a driving device. The reaction due to the braking is offset by the joining link portion, whereby a large force is not applied to the back plate or the like.Type: ApplicationFiled: November 4, 2010Publication date: August 16, 2012Inventors: Haruo Tsuzuku, Hiroyasu Ishikawa, Hiroshi Ikegami, Hideki Kakizaki, Toshifumi Maehara
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Publication number: 20100265739Abstract: A light-diffusing sheet which can prevent generation of scratches on the surface of the light-diffusing sheet or a surface of another member contacting with the light-diffusing sheet at the time of being used as a constituent member of a backlight unit of a liquid crystal display or transportation thereof, and also can exhibit the light-diffusing performance is provided. The light-diffusing sheet of the present invention has a light-diffusing layer comprising microparticles, wherein the light-diffusing layer has a surface showing a maximum peak height (Rp) of 8.0 ?m or higher in a roughness curve determined by three-dimensional surface profilometry, and mean particle size (?) of the microparticles contained in the light-diffusing layer and thickness (d) of the light-diffusing layer satisfy the relationship: ?/d?0.7.Type: ApplicationFiled: January 22, 2009Publication date: October 21, 2010Inventors: Yohei Funabashi, Hiroyasu Ishikawa, Kenji Fukui
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Patent number: 7391715Abstract: A transmitter device comprises an OFDM transmission unit, a MC-CDMA transmission unit, and a control unit for selecting either the OFDM transmission unit or the MC-CDMA transmission unit at slot time assigned to a receiver device in response to propagation conditions for the receiver device. The propagation conditions are a distance from the receiver device and a CINR.Type: GrantFiled: October 17, 2003Date of Patent: June 24, 2008Assignee: KDDI CorporationInventors: Kyesan Lee, Takeo Ohseki, Hiroyasu Ishikawa, Hideyuki Shinonaga
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Patent number: 7336742Abstract: A frequency error correction device for an OFDM receiver is proposed. The receiver receives an OFDM signal with a preamble section and a payload section including pilot carriers. The frequency error correction device includes a first frequency correction unit for correcting a relative phase error in a predetermined period of time based upon a frequency error in the preamble section of the OFDM signal in time domain, and a second frequency correction unit for correcting a remaining phase error in every predetermined period of time based upon the pilot carriers of the OFDM signal in frequency domain.Type: GrantFiled: April 28, 2003Date of Patent: February 26, 2008Assignee: KDDI CorporationInventors: Takeo Ohseki, Masato Furudate, Yoshio Kunisawa, Hiroyasu Ishikawa, Hideyuki Shinonaga
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Patent number: 7135347Abstract: A method for manufacturing a nitride film including a high-resistivity GaN layer includes a step of allowing a Group-III source gas containing an organic metal compound, a Group-V source gas containing ammonia, a carrier gas for the Group-III source gas, and a carrier gas for the Group-V source gas to flow over a predetermined monocrystalline wafer maintained at 1,000° C. or more and also includes a step of epitaxially growing a nitride film, including a GaN layer, on the monocrystalline wafer by a vapor phase reaction of the source gases. At least one of the carrier gases contains nitrogen while the wafer temperature is being increased before the reaction is carried out. At least one of the carrier gases contains hydrogen and nitrogen and has a total hydrogen and nitrogen content of 90 percent by volume or more in at least one part of the epitaxially growing step.Type: GrantFiled: June 22, 2004Date of Patent: November 14, 2006Assignee: NGK Insulators, Ltd.Inventors: Makoto Miyoshi, Masahiro Sakai, Mitsuhiro Tanaka, Takashi Egawa, Hiroyasu Ishikawa
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Patent number: 7123941Abstract: A radio LAN master station system which provides long distance communication and suffers from small interference by another system located inside and/or outside of a service area comprises a transceiver, and a plurality of directional antennas each directed to a respective section with some angular spacing, through a power distributor which couples said transceiver with said antennas. Polarization plane of any antenna is orthogonal to polarization plane of an adjacent antenna.Type: GrantFiled: February 27, 2002Date of Patent: October 17, 2006Assignee: KDDI R&D Laboratories Inc.Inventors: Tadayuki Fukuhara, Hiroyasu Ishikawa, Takayuki Warabino, Naoki Fuke, Keizo Sugiyama, Hideyuki Shinonaga
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Publication number: 20050009221Abstract: A method for manufacturing a nitride film including a high-resistivity GaN layer includes a step of allowing a Group-III source gas containing an organic metal compound, a Group-V source gas containing ammonia, a carrier gas for the Group-III source gas, and a carrier gas for the Group-V source gas to flow over a predetermined monocrystalline wafer maintained at 1,000° C. or more and also includes a step of epitaxially growing a nitride film, including a GaN layer, on the monocrystalline wafer by a vapor phase reaction of the source gases. At least one of the carrier gases contains nitrogen while the wafer temperature is being increased before the reaction is carried out. At least one of the carrier gases contains hydrogen and nitrogen and has a total hydrogen and nitrogen content of 90 percent by volume or more in at least one part of the epitaxially growing step.Type: ApplicationFiled: June 22, 2004Publication date: January 13, 2005Applicant: NGK Insulators, Ltd.Inventors: Makoto Miyoshi, Masahiro Sakai, Mitsuhiro Tanaka, Takashi Egawa, Hiroyasu Ishikawa
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Publication number: 20050000755Abstract: An operating apparatus 1100 of a brake apparatus 1001 for restricting rotation of a brake drum 1003 including an operating lever 1112 and an operation restricting portion 1120 is provided. The operating lever 1112 is supported to be able to operate in a movable range. The movable range includes: a brake release mode permitting rotation of the brake drum 1003 both in regular rotation and reverse rotation; and an auxiliary brake mode restricting only reverse rotation of the brake drum. The operating lever 1112 is urged in a direction reaching the auxiliary brake mode from the brake release mode in a normal state. The operation restricting portion 1120 restricts a movement of the operating lever 1112 reaching the auxiliary brake mode by being brought into contact with the operating lever 1112 in the brake release mode.Type: ApplicationFiled: March 26, 2004Publication date: January 6, 2005Inventors: Hiroshi Ikegami, Hiroyasu Ishikawa, Minoru Mashiko, Hitoshi Furukawa, Yukimasa Mitsude, Shinichi Terashima
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Publication number: 20040219328Abstract: A laminated soft magnetic member 5, which comprises a laminated body in which 1 &mgr;m or less thick soft magnetic metal layer 7 and an insulating layer 6 are laminated alternately and is 0.2 mm or less in overall thickness, is excellent in permeability in the high frequency band exceeding 800 MHz, and accordingly, by being attached to a cellular phone, can improve the radiation efficiency of the electromagnetic wave on the side opposite to the head of a human body and is preferable as a member for the countermeasure against SAR.Type: ApplicationFiled: June 4, 2004Publication date: November 4, 2004Inventors: Kazunori Tasaki, Yasushi Iijima, Akira Kakinuma, Katsuhiko Wakayama, Yasuo Hashimoto, Tsutomu Chou, Masanori Kaya, Hiroyasu Ishikawa, Shinichi Yamashita
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Patent number: 6785248Abstract: In each of communication stations, among all of spread spectrum signal waves having the carrier frequencies separated from each other in units of an integer multiple of the frequency amount R, all the spread spectrum signal waves having the carrier frequencies separated from each other in units of an even-number multiple of the frequency amount R are converged into a first group; all the spread spectrum signal waves that are adjacent to the aforementioned spread spectrum signal waves and that have the carrier frequencies separated in units of an even-number multiple of the frequency amount R are converged into a second group; and the first and the second groups of spread spectrum signal waves are simultaneously transmitted according to orthogonal polarized waves to perform information transmission.Type: GrantFiled: December 15, 2000Date of Patent: August 31, 2004Assignee: DDI Corp.Inventors: Naoki Fuke, Hiroyasu Ishikawa, Hideyuki Shinonaga
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Publication number: 20040141481Abstract: A transmitter device comprises an OFDM transmission unit, a MC-CDMA transmission unit, and a control unit for selecting either the OFDM transmission unit or the MC-CDMA transmission unit at slot time assigned to a receiver device in response to propagation conditions for the receiver device. The propagation conditions are a distance from the receiver device and a CINR.Type: ApplicationFiled: October 17, 2003Publication date: July 22, 2004Applicant: KDDI CORPORATIONInventors: Kyesan Lee, Takeo Ohseki, Hiroyasu Ishikawa, Hideyuki Shinonaga
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Publication number: 20040116077Abstract: A receiver device adopting STTD MC-CDMA scheme, includes a plurality of receive antennas, a plurality of MC-CDMA receive units for respectively converting received signals from the plurality of receive antennas into parallel signals, for respectively performing FFT of the converted parallel signals, for respectively inversely spreading transformed signals, and for respectively equalizing and combining inversely spread signals, STTD decoding units for decoding in time direction and in space direction output signals from the plurality of MC-CDMA receive units, a parallel to serial conversion unit for converting output signals from STTD decoding units into serial signals, a de-mapping unit for de-mapping output serial signals from the parallel to serial conversion unit, and a decoding de-interleaving unit for de-interleaving output signals from the de-mapping means and for decoding de-interleaved data by performing error correction.Type: ApplicationFiled: July 29, 2003Publication date: June 17, 2004Applicant: KDDI CORPORATIONInventors: Kyesan Lee, Takeo Ohseki, Hiroyasu Ishikawa, Hideyuki Shinonaga
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Publication number: 20030210646Abstract: A frequency error correction device for an OFDM receiver is proposed. The receiver receives an OFDM signal with a preamble section and a payload section including pilot carriers. The frequency error correction device includes a first frequency correction unit for correcting a relative phase error in a predetermined period of time based upon a frequency error in the preamble section of the OFDM signal in time domain, and a second frequency correction unit for correcting a remaining phase error in every predetermined period of time based upon the pilot carriers of the OFDM signal in frequency domain.Type: ApplicationFiled: April 28, 2003Publication date: November 13, 2003Applicant: KDDI CORPORATIONInventors: Takeo Ohseki, Masato Furudate, Yoshio Kunisawa, Hiroyasu Ishikawa, Hideyuki Shinonaga
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Publication number: 20030211827Abstract: The invention offers a repeater for radio communication system for eliminating a blind zone in a closed space in the radio communication system, which transmits information between a base station and a mobile station over a radio transmission medium. The repeater comprises a base station-directed unit equipped with a function of transmitting a radio signal to and receiving a radio signal from said base station, and a mobile station-directed unit equipped with a function of transmitting a radio signal to and receiving a radio signal from said mobile station. The base station-directed unit and the mobile station-directed unit are connected via a radio transmission medium over which an electromagnetic wave signal is transmitted.Type: ApplicationFiled: April 29, 2003Publication date: November 13, 2003Inventors: Kenya Yonezawa, Feng Lu, Yoshio Kunisawa, Hiroyasu Ishikawa, Hideyuki Shinonaga
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Patent number: 6629121Abstract: A surface acoustic wave-matched filter is disclosed which comprises: an input transducer provided on a piezoelectric substrate surface; a first output transducer, that is, a forward output transducer encoded in correspondence to a pseudo-noise code sequence for spectrum spreading and provided on the substrate surface; and a second output transducer, that is, a backward output transducer encoded in correspondence to the pseudo-noise sequence code and provided on the substrate surface at the succeeding to the forward output transducer by the length of the pseudo-noise code sequence as viewed from the input transducer. With the use of the surface acoustic wave-matched filter, it is possible to realize a differential detector for demodulating spread spectrum signals.Type: GrantFiled: October 7, 1999Date of Patent: September 30, 2003Inventors: Hiroyasu Ishikawa, Hideyuki Shinonaga