Patents by Inventor Takuro Handa

Takuro Handa 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).

  • POWER CONVERSION APPARATUS, AIR CONDITIONER AND REFRIGERATION APPARATUS
    Publication number: 20240136949
    Abstract: A power conversion apparatus includes: a converter configured to convert AC power that is input from an AC power supply via a first conductive line pair, into DC power; an inverter configured to convert the DC power that is output from the converter to a second conductive line pair, into the AC power; and a capacitor connected between conductive lines of the first conductive line pair or between conductive lines of the second conductive line pair, between one or more reactors and the inverter, wherein, letting a carrier frequency for driving the inverter be fC, a resonance frequency of an LC filter constituted by the one or more reactors and the capacitor be fLC, and a maximum value of an output frequency of the inverter be MAX(f0), MAX(f0) satisfies 6 times MAX(f0)<fLC<fC?3 times MAX(f0).
    Type: Application
    Filed: March 29, 2022
    Publication date: April 25, 2024
    Inventors: Yuki HANDA, Takuro OGAWA, Nobuo HAYASHI
  • Sulfidoxymolybdenum dialkylphosphorodithioate
    Patent number: 4789492
    Abstract: Disclosed is a novel sulfidoxymolybdenum dialkylphosphorodithioate represented by the following general formula (I): ##STR1## wherein R stands for a secondary alkyl group having 4 to 30 carbon atoms and four R's may be the same or different, and X stands for O or S and four X's may be the same or different.This compound is very valuable as the lubricant additive.
    Type: Grant
    Filed: March 21, 1986
    Date of Patent: December 6, 1988
    Assignee: Asahi Denka Kogyo K.K.
    Inventors: Shigeru Katsumata, Takuro Handa, Tamiji Kamakura, Noriyoshi Tanaka, Hidekatsu Katoh, Kimiyoshi Namiwa, Yoshikazu Shoji
  • Water-soluble coolant for formation of drawn and ironed cans
    Patent number: 4581152
    Abstract: Disclosed is a water-soluble coolant for formation of drawn and ironed cans, which comprises an aqueous solution containing 0.1 to 20% by weight of a phosphorus-containing compound obtained by esterifying an epoxidation product of at least one higher unsaturated fatty acid or its ester with phosphoric acid.
    Type: Grant
    Filed: July 25, 1984
    Date of Patent: April 8, 1986
    Assignees: Toyo Seikan Kaisha, Ltd., Asahi Denka Kogyo Kabushiki Kaisha
    Inventors: Hisashi Hotta, Toshiyuki Noda, Yoshiharu Tobita, Isao Watabiki, Yasu Ishimoto, Takuro Handa, Masashi Umemura
  • Sulfur containing molybdenum dihydrocarbyldithiocarbamate compound
    Patent number: 4098705
    Abstract: A compound having the following general formula (I); ##STR1## wherein R.sub.1 and R.sub.2 stand for a hydrocarbyl group having from 1 to 24 carbon atoms, x is a number of 0.5 - 2.3, useful as an additive for lubricants.
    Type: Grant
    Filed: July 29, 1976
    Date of Patent: July 4, 1978
    Assignee: Asahi Denka Kogyo K.K.
    Inventors: Toshio Sakurai, Akio Nishihara, Takuro Handa, Hidekatsu Katoh, Yoshiro Tomoda, Kazumi Aoki, Makoto Yoto