Patents by Inventor Masaru Hirai

Masaru Hirai 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: 11549972
    Abstract: A voltage detection circuit including a voltage input terminal, a voltage dividing circuit, a voltage comparison circuit, an output terminal, a detection voltage adjustment terminal, a voltage-current conversion circuit, and a constant current source. A voltage to be monitored is input to the voltage input terminal. The voltage dividing circuit includes series resistors between the voltage input terminal and a constant voltage terminal. The voltage comparison circuit compares a voltage divided by the voltage dividing circuit with a predetermined voltage. The comparison result is output from the output terminal. An external resistor is connected to the detection voltage adjustment terminal. The voltage-current conversion circuit is provided between the detection voltage adjustment terminal and the voltage dividing circuit. The constant current source is connected between an internal power supply voltage terminal and the detection voltage adjustment terminal.
    Type: Grant
    Filed: February 26, 2021
    Date of Patent: January 10, 2023
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Hitoshi Tabuchi, Masaru Hirai, Tomiyuki Nagai, Kenya Tokuda
  • Publication number: 20220271747
    Abstract: Disclosed is a reset semiconductor integrated circuit that outputs a reset signal in response to a power supply voltage of a monitoring target becoming lower than a predetermined level, the reset semiconductor integrated circuit including: a voltage detection circuit; an output stage including a CMOS circuit that generates and outputs a signal according to a detection result of the voltage detection circuit; a monitored voltage input terminal to which the power supply voltage of the monitoring target is input; a reference potential terminal to which a voltage as a reference potential of a circuit is applied; an external voltage terminal which is connected to a power supply voltage terminal of the output stage to allow a power supply voltage as an operation voltage of the output stage to be applied from outside; and an output terminal to output the signal generated by the output stage.
    Type: Application
    Filed: February 24, 2022
    Publication date: August 25, 2022
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yoichi TAKANO, Masaru HIRAI
  • Publication number: 20210293859
    Abstract: A voltage detection circuit including a voltage input terminal, a voltage dividing circuit, a voltage comparison circuit, an output terminal, a detection voltage adjustment terminal, a voltage-current conversion circuit, and a constant current source. A voltage to be monitored is input to the voltage input terminal. The voltage dividing circuit includes series resistors between the voltage input terminal and a constant voltage terminal. The voltage comparison circuit compares a voltage divided by the voltage dividing circuit with a predetermined voltage. The comparison result is output from the output terminal. An external resistor is connected to the detection voltage adjustment terminal. The voltage-current conversion circuit is provided between the detection voltage adjustment terminal and the voltage dividing circuit. The constant current source is connected between an internal power supply voltage terminal and the detection voltage adjustment terminal.
    Type: Application
    Filed: February 26, 2021
    Publication date: September 23, 2021
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Hitoshi TABUCHI, Masaru HIRAI, Tomiyuki NAGAI, Kenya TOKUDA
  • Patent number: 8310287
    Abstract: A reset circuit for resetting and terminating the resetting of a reset target includes an n-channel metal-oxide-semiconductor field-effect transistor (MOSFET), a gate drive circuit configured to switch a drain voltage of the n-channel MOSFET from a low level to a high level when a power supply voltage exceeds a predetermined threshold, a sink circuit configured to maintain the drain voltage at the low level by sinking a current flowing from a drain side of the n-channel MOSFET to the sink circuit, and a block circuit configured to block the current sinking to the sink circuit when the power supply voltage exceeds the predetermined threshold. The low level indicates a state where the reset target is in a reset state and the high level indicates a state where the reset state of the reset target is terminated.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: November 13, 2012
    Assignee: Mitsumi Electric Co., Ltd.
    Inventor: Masaru Hirai
  • Publication number: 20120019291
    Abstract: A reset circuit for resetting and terminating the resetting of a reset target includes an n-channel metal-oxide-semiconductor field-effect transistor (MOSFET), a gate drive circuit configured to switch a drain voltage of the n-channel MOSFET from a low level to a high level when a power supply voltage exceeds a predetermined threshold, a sink circuit configured to maintain the drain voltage at the low level by sinking a current flowing from a drain side of the n-channel MOSFET to the sink circuit, and a block circuit configured to block the current sinking to the sink circuit when the power supply voltage exceeds the predetermined threshold. The low level indicates a state where the reset target is in a reset state and the high level indicates a state where the reset state of the reset target is terminated.
    Type: Application
    Filed: July 21, 2011
    Publication date: January 26, 2012
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Masaru HIRAI
  • Patent number: 5254754
    Abstract: An adduct of an unsaturated alcohol and an iodinated fluoroalkane is produced at a high conversion and high yield by reacting the unsaturated alcohol and the iodinated fluoroalkane in the presence of a radical catalyst and at least one additive selected from the group consisting of water, basic compounds, metal oxides, silver compounds and epoxy compounds.
    Type: Grant
    Filed: July 14, 1991
    Date of Patent: October 19, 1993
    Assignee: Daikin Industries Ltd.
    Inventors: Yoshio Amimoto, Masaru Hirai, Sueyoshi Ishikawa, Tatsuya Ohtsuka
  • Patent number: 5143991
    Abstract: A copolymer comprising (a) an acrylate or methacrylate having a fluoroalkyl group, (b) a polyalkylene glycol acrylate or methacrylate, (c) an acrylate or methacrylate having a hydroxyl group, and (d) at least one compound selected from the group consisting of alkyl acrylates, alkyl methacrylates and butadiene, which can impart durable water- and oil- repellency and soil-releasability to fabrics.
    Type: Grant
    Filed: June 19, 1990
    Date of Patent: September 1, 1992
    Assignee: Daikin Industries, Ltd.
    Inventors: Yoshio Amimoto, Yuko Hirata, Masaru Hirai, Akihiko Ueda
  • Patent number: 5041480
    Abstract: A fluoroelastomer composition comprising a fluoroelastomer, a fluorine-containing surfactant and optionally a vulcanizing agent which has improved processability, particularly mold releasability and mold contamination proofness.
    Type: Grant
    Filed: July 9, 1985
    Date of Patent: August 20, 1991
    Assignee: Daikin Industries, Ltd.
    Inventors: Shoji Kawachi, Yasuyoshi Furukawa, Yutaka Ueta, Hiroyuki Tanaka, Masaru Hirai
  • Patent number: 4976741
    Abstract: An antistatic agent comprising a fluorine-containing anionic surfactant and a nonionic surfactant in a weight ratio of 95:5 to 5:95 or an anionic surfactant and a fluorine-containing surfactant in a weight ratio of 95:5 to 5:95, which, even in a small amount, can impart an antistatic effect to a substrate.
    Type: Grant
    Filed: June 12, 1986
    Date of Patent: December 11, 1990
    Assignee: Daikin Industries Ltd.
    Inventors: Iwao Hisamoto, Masaru Hirai, Sueyoshi Ishikawa
  • Patent number: 4927950
    Abstract: A fluorine-containing silane compound of the formula: ##STR1## wherein R.sub.f is a fluorine-containing C.sub.4 --C.sub.18 aliphatic group, R.sup.1 is hydrogen or a C.sub.1 -C.sub.4 alkyl group, A is a straight or branched C.sub.1 -C.sub.12 alkylene group or a group of the formula: ##STR2## in which R.sup.2 is hydrogen or a C.sub.1 -C.sub.3 acyl group, R.sup.3 is a C.sub.1 -C.sub.6 acyl group, A' is a C.sub.2 -C.sub.8 alkylene group, A" is a C.sub.1 -C.sub.4 alkylene group, and Q is --CO-- or --SO.sub.2 --, B is a group of the formula: ##STR3## in which R.sup.4 and R.sup.5 are each a straight or branched C.sub.2 or C.sub.3 alkylene group, and p is 2 or 3, X is chlorine or a C.sub.1 -C.sub.3 alkoxy group, X' is chlorine or a C.sub.1 -C.sub.3 alkyl or alkoxy group, a phenyl group or a glycidyl group, m is 0 or 1, and n is an integer of 0 to 40, which modifies surface characteristics of a solid substrate.
    Type: Grant
    Filed: March 8, 1985
    Date of Patent: May 22, 1990
    Assignee: Daikin Industries, Ltd.
    Inventors: Iwao Hisamoto, Masaru Hirai, Sueyoshi Ishikawa
  • Patent number: 4695488
    Abstract: A soil release composition comprising:(A) a polymer comprising 10 to 100% by weight of constituting units of the formula: ##STR1## wherein R.sub.f is a C.sub.3 --C.sub.21 fluoroalkyl group; R.sup.1 is a hydrogen atom or a C.sub.2 --C.sub.4 acyl group; R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are, the same or different, each a hydrogen atom, a methyl group or an ethyl group; A is a group of the formula: --CH.sub.2 CH(OR.sup.1)CH.sub.2 --OCO-- which R.sup.1 is the same as defined in the above, --CO--, --(CH.sub.2).sub.k N(R.sup.2)CO-- in which R.sup.2 is the same as defined in the above and k is an integer of 1 to 10, or --(CH.sub.2).sub.
    Type: Grant
    Filed: March 3, 1986
    Date of Patent: September 22, 1987
    Assignee: Daikin Industries, Ltd.
    Inventors: Iwao Hisamoto, Masaru Hirai, Sueyoshi Ishikawa
  • Patent number: 4606832
    Abstract: A fire extinguishing composition which comprises bromofluorohydrocarbon and/or bromochlorofluorohydrocarbon and a fluorine-containing high molecular compound.
    Type: Grant
    Filed: November 4, 1983
    Date of Patent: August 19, 1986
    Assignee: Daikin Kogyo Company, Limited
    Inventors: Iwao Hisamoto, Chiaki Maeda, Takasige Esaka, Masaru Hirai
  • Patent number: 4563287
    Abstract: An aqueous fire-extinguishing composition comprising an aqueous solvent and a water-soluble high molecular compound which contains a fluoroalkyl group and a water-solubilizable group, has an average molecular weight of not less than 5,000 and fluorine content of not less than 10% by weight and is soluble in water in an amount of at least 0.1% by weight at 25.degree. C. and the surface tension of which is not more than 50 dyn/cm when measured on 0.1 to 5.0% by weight aqueous solution at 25.degree. C. has excellent fire-extinguishing performance on fire of cooking oil, particularly of frying oil.
    Type: Grant
    Filed: August 16, 1983
    Date of Patent: January 7, 1986
    Assignee: Daikin Kogyo Co., Ltd.
    Inventors: Iwao Hisamoto, Chiaki Maeda, Takasige Esaka, Masaru Hirai
  • Patent number: 4559179
    Abstract: A fluorine-containing vinyl compound of the formula: ##STR1## wherein Rf is fluoroalkyl of 4 to 20 carbon atoms, R.sub.1 is hydrogen or acyl of 1 to 3 carbon atoms, one of R.sub.2 and R.sub.3 is hydrogen and the other is methyl, R.sub.4 is hydrogen or methyl, A is a divalent organic group, and l, m and n are each an integer of 0 to 40 and satisfy 0<l+m+n.ltoreq.40, which can modify surface properties of resins.
    Type: Grant
    Filed: April 5, 1984
    Date of Patent: December 17, 1985
    Assignee: Daikan Kogyo Co., Ltd.
    Inventors: Iwao Hisamoto, Chiaki Maeda, Masaru Hirai
  • Patent number: 4511733
    Abstract: A fluorine-containing aminocarboxylic acid compound of the formula: ##STR1## wherein Rf is a C.sub.3 -C.sub.21 fluorine-containing aliphatic group; R.sub.1 is a hydrogen atom or a C.sub.1 -C.sub.3 acyl group; R.sub.2 is a hydrogen atom or a C.sub.1 -C.sub.5 alkyl group; R.sub.3 is a substituted or unsubstituted C.sub.1 -C.sub.3 alkylene group; M is a cation; and n is an integer of 1 to 5 effectively lowers the surface tension of water and/or organic liquids and the interfacial tensions between them.
    Type: Grant
    Filed: December 23, 1982
    Date of Patent: April 16, 1985
    Assignee: Daikin Kogyo Co., Ltd.
    Inventors: Iwao Hisamoto, Chiaki Maeda, Masaru Hirai
  • Patent number: 4326576
    Abstract: Disclosed is a high hardness rubber composition having a hardness of at least 92, which comprises 100 parts by weight of a rubber, 55 to 95 parts by weight of soft black having an average particle size of 40 to 80 millimicrons, 5 to 30 parts by weight of a thermosetting resin and a small amount of a curing agent, the sum of the amounts of the soft black and thermosetting resin being 60 to 100 parts by weight per 100 parts by weight of the rubber.This high hardness rubber composition is advantageously used as a tire reinforcement for the rim cushion portion or for both the rim cushion portion and bead filler.
    Type: Grant
    Filed: March 18, 1981
    Date of Patent: April 27, 1982
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Yasuhiro Mizumoto, Yukio Tozawa, Masatoshi Kozima, Masaru Hirai
  • Patent number: 4319619
    Abstract: A pneutmatic radial-ply tire in which the rubber portion of at least one of a carcass ply and an undertread constituting the tire is made of a rubber which has a viscoelastic property of loss tangent, tan.delta., of 0.2 or lower (tan.delta..ltoreq.0.2) and storage modulus, G, of 120 Kg/cm.sup.2 or higher (G.gtoreq.120 kg/cm.sup.2), so that the rolling resistance of the tire is reduced without being accompanied by degradation of braking performance, control stability, comfortableness and wear resistance of the tire.
    Type: Grant
    Filed: March 20, 1980
    Date of Patent: March 16, 1982
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Masatoshi Kozima, Akinori Tokieda, Tadanobu Nagumo, Masaru Hirai