Patents by Inventor Makoto Iwasaki

Makoto Iwasaki 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: 9165697
    Abstract: A peroxide crosslinked resin composition includes a base polymer (A) including 50 to 90% by mass of a first copolymer component (a1) including one of or a mixture of two or more first ethylene ?-olefin copolymers having a density of 0.864 to 0.890 g/cm3, a melt flow rate (MFR) of 1 to 5 g/10 min, and a melting point of not higher than 90 degrees Celsius, and 10 to 50% by mass of a second copolymer component (a2) including one of or a mixture of two or more second ethylene ?-olefin copolymers having a melt flow rate (MFR) of not smaller than 30 g/10 min, and a melting point of 55 to 80 degrees Celsius, an inorganic filler (B) added in a ratio of from 80 parts to 150 parts by mass with respect to 100 parts by mass of the base polymer (A), and a peroxide crosslinker (C).
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: October 20, 2015
    Assignee: Hitachi Metals, Ltd.
    Inventors: Makoto Iwasaki, Hitoshi Kimura
  • Patent number: 9154004
    Abstract: In the rare earth sintered magnet, the ratio of R2 to the sum of R1 and R2 that are contained in crystal grain boundaries surrounding the crystal grains in the rare earth sintered magnet body is higher than the ratio of R2 to the sum of R1 and R2 in the crystal grains, and the concentration of R2 increases from the central portion of the rare earth sintered magnet body toward the surface of the rare earth sintered magnet body. In addition, the degree of unevenness in residual magnetic flux density on the surface of the rare earth sintered magnet body is smaller than 3.0%.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: October 6, 2015
    Assignee: TDK CORPORATION
    Inventors: Makoto Iwasaki, Fumitaka Baba, Satoshi Tanaka, Hideki Sasaki, Takahide Kurahashi, Hitoshi Maro, Keiichi Morimoto, Seiichi Endo
  • Patent number: 9075399
    Abstract: A positioning control system for an actuator provided with a strain wave gearing is provided with: a semi-closed feedback controller FB(s) that controls a load shaft position ?1 on the basis of a feedback motor shaft position ?m; and a feedforward linearization compensator configured by incorporating a nonlinear plant model for an object to be controlled into a feedback linearization compensator using an exact linearization technique. The feedforward linearization compensator uses a forward-calculated state quantity estimated value x* to calculate a feedforward current instruction i*ref and a feedforward motor position instruction ?*m to be input into the feedback controller FB(s). A positioning error caused by a non-linear element (non-linear spring property, relative rotational synchronization component, and non-linear friction) of the strain wave gearing is compensated for by the feedforward linearization compensator.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: July 7, 2015
    Assignees: HARMONIC DRIVE SYSTEMS INC., NATIONAL UNIVERSITY CORPORATION NAGOYA INSTITUTE OF TECHNOLOGY
    Inventors: Masafumi Yamamoto, Yoshifumi Okitsu, Makoto Iwasaki
  • Patent number: 9008843
    Abstract: In a positioning apparatus for an actuator, a sliding mode controller for compensating for nonlinear characteristics of a wave gear device of the actuator generates a control input u to a controlled object, based on a position command ?l* and a state variable x for expressing the controlled object. The controlled object is defined in the following formula. {dot over (x)}=Ax+Bu+E?l* y=Cx The switching surfaces of the sliding mode control system are defined by a variable S expressed in the following formula. S=BTP The control input u is the sum of the linear-state feedback control term ul and the nonlinear control input unl u = u l + u nl = - ( SB ) - 1 ? ( SAx + SE ? ? ? l * ) - k ? ( SB ) - 1 ? ? ? ? ? ? = Sx , where ? is the switching function, and k is the switching gain.
    Type: Grant
    Filed: April 17, 2012
    Date of Patent: April 14, 2015
    Assignees: Harmonic Drive Systems Inc., National University Corporation Nagoya Institute of Technology
    Inventors: Yoshifumi Okitsu, Masafumi Yamamoto, Yuki Kato, Makoto Iwasaki
  • Publication number: 20150060107
    Abstract: A halogen-free resin composition includes an engineering plastic as a main component including an aromatic ring. A thermal weight-change rate measured by a thermogravimetry (under conditions that a dry air as a purge gas is introduced and that heating is conducted from 40° C. at a temperature rise rate of 10° C./min) is not less than ?60% when it is 430° C.
    Type: Application
    Filed: August 28, 2014
    Publication date: March 5, 2015
    Inventors: Makoto Iwasaki, Kenichiro Fujimoto
  • Publication number: 20150030853
    Abstract: A crosslinkable halogen-free resin composition includes a base polymer including at least one type of ethylene-vinyl acetate copolymer (EVA) and an acid-modified polyolefin resin having a glass-transition temperature (Tg) as measured by DSC of not more than ?55° C. at a mass ratio of 70:30 to 99:1, and a metal hydroxide included in an amount of 100 to 250 parts by mass per 100 parts by mass of the base polymer. The at least one type of EVA has a melting temperature (Tm) as measured by DSC of not less than 70° C. The base polymer includes 25 to 50 mass % of a vinyl acetate (VA).
    Type: Application
    Filed: July 9, 2014
    Publication date: January 29, 2015
    Inventors: Makoto IWASAKI, Mitsuru HASHIMOTO
  • Publication number: 20140370286
    Abstract: A halogen-free flame-retardant wire includes a conductor, and a single insulation layer or a plurality of insulation layers formed by covering an outer periphery of the conductor with a halogen-free flame-retardant resin composition. The single insulation layer or an outermost insulation layer of the plurality of insulation layers includes a halogen-free flame-retardant resin composition including a base polymer including an ethylene-vinyl acetate copolymer (EVA) of not less than 25 mass % in a vinyl acetate content (VA content) or a polyethylene (PE) with a melting peak at 115 to 140° C. measured by a differential scanning calorimetry (DSC), and a metal hydroxide mixed in an amount of 150 to 300 parts by mass per 100 parts by mass of the base polymer. A mass change rate of the single insulation layer or the outermost insulation layer after 24-hour immersion in xylene at 110° C. is not more than 420%.
    Type: Application
    Filed: June 12, 2014
    Publication date: December 18, 2014
    Inventors: Makoto IWASAKI, Mitsuru HASHIMOTO
  • Publication number: 20140367144
    Abstract: A halogen-free flame-retardant resin composition includes a base polymer including not less than 5 mass % of an ethylene-?-olefin block copolymer having a melting point of not less than 118° C. and a glass transition temperature (Tg) of not more than ?40° C., and a metal hydroxide added in an amount of 50 to 250 parts by mass per 100 parts by mass of the base polymer.
    Type: Application
    Filed: June 12, 2014
    Publication date: December 18, 2014
    Inventors: Kentaro SEGAWA, Makoto Iwasaki, Yoshiaki Nakamura
  • Publication number: 20140370315
    Abstract: A non-halogen flame retardant electric wire cable includes a conductor, at least one insulating layer formed on an outer periphery of the conductor by coating the conductor with a non-halogen flame retardant resin composition, and a sheath formed on an outer periphery of the outermost insulating layer by coating the outermost insulating layer with the non-halogen flame retardant resin composition. The non-halogen flame retardant resin composition includes a base polymer including any one of ethylene-vinyl acetate copolymer having a vinyl acetate content of 25% by mass or more and polyethylene having a melting peak temperature of 115° C. to 140° C. as measured by DSC and a metal hydroxide. Ratios of the changes in the mass of the sheath and the outermost insulating layer which occur when the sheath and the outermost insulating layer are immersed in xylene heated at 110° C. for 24 hours are 420% or less.
    Type: Application
    Filed: June 6, 2014
    Publication date: December 18, 2014
    Inventors: Makoto Iwasaki, Mitsuru Hashimoto
  • Publication number: 20140335268
    Abstract: A rare earth sintered magnet 10 including a magnet body that includes a rare earth compound, and a protective layer on the magnet body, having a first layer and a second layer in that order from the magnet body side, wherein the surface portion of the magnet body has a higher heavy rare earth element content than the interior of the magnet body that is surrounded by the surface portion, the first layer includes a rare earth oxide, the mass ratio of the heavy rare earth element being 1 or greater with respect to the light rare earth element, and the second layer includes an oxide containing iron and/or boron which is different from the rare earth oxide, the second layer having a lower rare earth oxide content than the first layer.
    Type: Application
    Filed: July 25, 2014
    Publication date: November 13, 2014
    Inventors: Satoshi Tanaka, Fumitaka Baba, Makoto Iwasaki, Chikara Ishizaka
  • Patent number: 8829350
    Abstract: A crosslinked resin composition includes a resin composition including not less than 0.01 parts by mass and not more than 20 parts by mass of a vinyl monomer relative to 100 parts by mass of a thermoplastic polyurethane, the vinyl monomer having a molecular structure including at least one functional group of acid anhydride, silane, amine and epoxy. The resin composition is crosslinked by an electron beam irradiation.
    Type: Grant
    Filed: March 17, 2012
    Date of Patent: September 9, 2014
    Assignee: Hitachi Metals, Ltd.
    Inventors: Makoto Iwasaki, Akinari Nakayama
  • Patent number: 8823478
    Abstract: A rare earth sintered magnet 10 including a magnet body that includes a rare earth compound, and a protective layer on the magnet body, having a first layer and a second layer in that order from the magnet body side, wherein the surface portion of the magnet body has a higher heavy rare earth element content than the interior of the magnet body that is surrounded by the surface portion, the first layer includes a rare earth oxide, the mass ratio of the heavy rare earth element being 1 or greater with respect to the light rare earth element, and the second layer includes an oxide containing iron and/or boron which is different from the rare earth oxide, the second layer having a lower rare earth oxide content than the first layer.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: September 2, 2014
    Assignee: TDK Corporation
    Inventors: Satoshi Tanaka, Fumitaka Baba, Makoto Iwasaki, Chikara Ishizaka
  • Publication number: 20140203752
    Abstract: A positioning control system for an actuator provided with a strain wave gearing is provided with: a semi-closed feedback controller FB(s) that controls a load shaft position ?l on the basis of a feedback motor shaft position ?m; and a feedforward linearization compensator configured by incorporating a nonlinear plant model for an object to be controlled into a feedback linearization compensator using an exact linearization technique. The feedforward linearization compensator uses a forward-calculated state quantity estimated value x* to calculate a feedforward current instruction i*ref and a feedforward motor position instruction ?*m to be input into the feedback controller FB(s). A positioning error caused by a non-linear element (non-linear spring property, relative rotational synchronization component, and non-linear friction) of the strain wave gearing is compensated for by the feedforward linearization compensator.
    Type: Application
    Filed: October 24, 2011
    Publication date: July 24, 2014
    Applicants: National University Corporation Nagoya Institute of Technology, Harmonic Drive Systems Inc.
    Inventors: Masafumi Yamamoto, Yoshifumi Okitsu, Makoto Iwasaki
  • Publication number: 20140138117
    Abstract: A peroxide crosslinked resin composition includes a base polymer (A) including 50 to 90% by mass of a first copolymer component (a1) including one of or a mixture of two or more first ethylene ?-olefin copolymers having a density of 0.864 to 0.890 g/cm3, a melt flow rate (MFR) of 1 to 5 g/10 min, and a melting point of not higher than 90 degrees Celsius, and 10 to 50% by mass of a second copolymer component (a2) including one of or a mixture of two or more second ethylene ?-olefin copolymers having a melt flow rate (MFR) of not smaller than 30 g/10 min, and a melting point of 55 to 80 degrees Celsius, an inorganic filler (B) added in a ratio of from 80 parts to 150 parts by mass with respect to 100 parts by mass of the base polymer (A), and a peroxide crosslinker (C).
    Type: Application
    Filed: November 19, 2013
    Publication date: May 22, 2014
    Applicant: Hitachi Metals, Ltd.
    Inventors: Makoto IWASAKI, Hitoshi Kimura
  • Publication number: 20140141245
    Abstract: A halogen-free crosslinked resin composition includes a base polymer including as a main component (a) an ethylene vinyl acetate copolymer and (b) an acid modified polyolefin resin having a differential scanning calorimetry glass transition temperature Tg of not higher than ?55 degrees Celsius in a mass ratio (a):(b) of 70:30 to 100:0, the base polymer including 50 to 70% by mass of vinyl acetate, 0.5 to 10 parts by mass of a silicone rubber with respect to 100 parts by mass of the base polymer, and 100 to 250 parts by mass of a metal hydroxide with respect to 100 parts by mass of the base polymer.
    Type: Application
    Filed: November 19, 2013
    Publication date: May 22, 2014
    Applicant: Hitachi Metals, Ltd.
    Inventors: Makoto IWASAKI, Hitoshi Kimura
  • Publication number: 20140046548
    Abstract: A control system calculates inputs to a control target that has m inputs and n outputs (m=n, each of m and n is a natural number that is more than one), while designating a plurality of combinations of the inputs and the outputs. A feedback controller calculates, with respect to each designated combination, a control input to a non-interference controller based on a difference between a target value and a current value of the control quantity to make the current value follow the target value. The non-interference controller executes, with respect to each designated combination, a non-interference control to reduce influence due to mutual interference between n control quantities. This reduces the number of combinations of the inputs and the outputs, the combinations whose mutual interference needs considering; thereby, the non-interference control may be easily achieved.
    Type: Application
    Filed: July 18, 2013
    Publication date: February 13, 2014
    Inventors: Yasuhiko MUKAI, Yoshifumi MORITA, Hiroyuki UKAI, Makoto IWASAKI, Takeshi WADA
  • Publication number: 20140019505
    Abstract: An apparatus for estimating a transfer function of at target object having divided systems is disclosed. The apparatus acquires an estimation equation to estimate the transfer function of the target object, and determines, for each arithmetic operation in the estimation equation, whether the arithmetic operation is an addition or a multiplication. For the multiplication, the apparatus performs the multiplication of frequency response characteristics in the frequency domain. For addition, the apparatus converts the frequency response characteristics into time response characteristics, performs the addition of the time response characteristics in the time domain, and reconverts a result of the addition into the frequency domain.
    Type: Application
    Filed: July 11, 2013
    Publication date: January 16, 2014
    Inventors: Yasuhiko MUKAI, Yoshifumi MORITA, Hiroyuki UKAI, Makoto IWASAKI, Hiroyasu OTAKE, Ryo KANO
  • Publication number: 20140011028
    Abstract: An insulated wire for vehicle use includes a conductor and an insulating layer disposed on an outer circumference of the conductor. The insulating layer comprises a halogen-free flame retardant cross-linkable resin composition containing a base polymer, and a silane coupling agent and a metal hydroxide which are added to the base polymer. The base polymer includes, as major components, (a) an ethylene-vinyl acetate copolymer (EVA) and (b) an acid-modified olefin resin having a Tg of ?55° C. or lower at a ratio (a):(b) of 70:30 to 100:0 and has an acetic acid content (VA) of 50% to 70% by mass. The silane-coupling agent is added in an amount of 1 to 5 parts by mass and the metal hydroxide is added in an amount of 100 to 250 parts by mass relative to 100 parts by mass of the base polymer.
    Type: Application
    Filed: June 12, 2013
    Publication date: January 9, 2014
    Inventors: Makoto Iwasaki, Kentaro Segawa, Hitoshi Kimura
  • Patent number: 8581863
    Abstract: A liquid crystal display panel in which coordinate detection electrodes are formed on a first substrate and protruding contact portions are formed on a second substrate as a touch panel function includes a conversion circuit formed therein. The conversion circuit subjects information indicative of whether the protruding contact portions are in contact with the coordinate detection electrodes to parallel/serial conversion to output the converted information to the coordinate detection circuit.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: November 12, 2013
    Assignee: Casio Computer Co., Ltd.
    Inventors: Kazuhiro Sasaki, Makoto Iwasaki, Toshiharu Nishino
  • Patent number: 8488413
    Abstract: An indicated position detecting apparatus includes a display module having a display screen, and a plurality of microphones to detect a contact sound to the display screen. The plurality of microphones are arranged at an outer peripheral portion of the display screen to be apart from each other. A time difference acquisition unit acquires arrival time differences of the contact sound between two microphones in each of two combinations of the plurality of microphones. A positional information acquisition unit derives two hyperbolas corresponding to the arrival time differences acquired by the time difference acquisition unit, each hyperbola having focal points at the two microphones in each of the two combinations of the plurality of microphones, and acquires an intersection of the two derived hyperbolas as information of a position where the contact sound is generated.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: July 16, 2013
    Assignee: Casio Computer Co., Ltd.
    Inventors: Toshiharu Nishino, Tetsushi Yoshida, Kunpei Kobayashi, Makoto Iwasaki