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Shigekazu Nozawa

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Patents Grantslast 30 patents

  • Information Patent Grant

    Displacement type compressor having a self-start synchronous motor...
    • Patent number 8,241,021
    • Issue date Aug 14, 2012
    • Hitachi Appliances, Inc.
    • Takeshi Tsuchiya
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Motor, compressor, and air conditioner
    • Patent number 7,501,734
    • Issue date Mar 10, 2009
    • Hitachi Appliances, Inc.
    • Akeshi Takahashi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Displacement type compressor having a self-start synchronous motor...
    • Patent number 7,442,017
    • Issue date Oct 28, 2008
    • Hitachi Appliances, Inc.
    • Takeshi Tsuchiya
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Scroll compressor having a movable auxiliary portion with contact p...
    • Patent number 7,163,386
    • Issue date Jan 16, 2007
    • Hitachi Appliances, Inc.
    • Takeshi Tsuchiya
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Screw compressor
    • Patent number 7,014,437
    • Issue date Mar 21, 2006
    • Hitachi, Ltd., trustee, for the benefit of Hitachi Air Conditioning Systems C...
    • Hiroki Ohsumimoto
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Screw compressor and method of manufacturing rotor for the same
    • Patent number 6,884,049
    • Issue date Apr 26, 2005
    • Hitachi, Ltd.,
    • Takeshi Hida
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Compressor with oil-mist separator
    • Patent number 6,554,595
    • Issue date Apr 29, 2003
    • Hitachi, Ltd.
    • Takeshi Hida
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Screw compressor
    • Patent number 6,506,039
    • Issue date Jan 14, 2003
    • Hitachi, Ltd.
    • Hiroki Osumimoto
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Screw compressor
    • Patent number 6,422,844
    • Issue date Jul 23, 2002
    • Hitachi Air Conditioning Systems Co., Ltd.
    • Yasuhiro Hioki
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Screw compressor
    • Patent number 6,273,693
    • Issue date Aug 14, 2001
    • Hitachi, Ltd.
    • Takeshi Hida
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Screw fluid machine
    • Patent number 6,257,855
    • Issue date Jul 10, 2001
    • Hitachi, Ltd.
    • Hirotaka Kameya
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Screw compressor
    • Patent number 6,183,227
    • Issue date Feb 6, 2001
    • Hitachi, Ltd.
    • Takeshi Hida
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Scroll compressor with oiling mechanism
    • Patent number 5,947,709
    • Issue date Sep 7, 1999
    • Hitachi, Ltd.
    • Masaki Koyama
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Scroll compressor with oiling mechanism
    • Patent number 5,716,202
    • Issue date Feb 10, 1998
    • Hitachi, Ltd.
    • Masaki Koyama
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Screw compressor with slide valve movement preventing structure
    • Patent number 4,913,634
    • Issue date Apr 3, 1990
    • Hitachi, Ltd.
    • Kimio Nagata
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Gas injection system for screw compressor
    • Patent number 4,727,725
    • Issue date Mar 1, 1988
    • Hitachi, Ltd.
    • Kimio Nagata
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
  • Information Patent Grant

    Refrigerator
    • Patent number 4,261,180
    • Issue date Apr 14, 1981
    • Hitachi, Ltd.
    • Shigekazu Nozawa
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
  • Information Patent Grant

    Screw compressor
    • Patent number 4,234,296
    • Issue date Nov 18, 1980
    • Hitachi, Ltd.
    • Katsumi Matsubara
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

  • Information Patent Application

    Displacement Type Compressor Having a Self-Start Synchronous Motor...
    • Publication number 20110020161
    • Publication date Jan 27, 2011
    • Hitachi Appliances, Inc.
    • Takeshi TSUCHIYA
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    DISPLACEMENT TYPE COMPRESSOR HAVING A SELF-START SYNCHRONOUS MOTOR...
    • Publication number 20090010776
    • Publication date Jan 8, 2009
    • Hitachi Appliances, Inc.
    • Takeshi Tsuchiya
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Two-stage screw compressor
    • Publication number 20070003421
    • Publication date Jan 4, 2007
    • Eisuke Kato
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Motor, compressor, and air conditioner
    • Publication number 20060181173
    • Publication date Aug 17, 2006
    • Akeshi Takahashi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    Displacement type compressor
    • Publication number 20060140792
    • Publication date Jun 29, 2006
    • Hitachi Air Conditioning Systems Co., Ltd.
    • Takeshi Tsuchiya
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Scroll compressor
    • Publication number 20050226755
    • Publication date Oct 13, 2005
    • Takeshi Tsuchiya
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Fluid compressor
    • Publication number 20050180871
    • Publication date Aug 18, 2005
    • Masaru Ohtahara
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Screw compressor and method of manufacturing rotor for the same
    • Publication number 20050063852
    • Publication date Mar 24, 2005
    • Takeshi Hida
    • C21 - METALLURGY OF IRON
  • Information Patent Application

    Screw compressor
    • Publication number 20040208771
    • Publication date Oct 21, 2004
    • Hiroki Ohsumimoto
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Screw compressor and method of manufacturing rotor for the same
    • Publication number 20030108446
    • Publication date Jun 12, 2003
    • Takeshi Hida
    • C21 - METALLURGY OF IRON
  • Information Patent Application

    SCREW COMPRESSOR
    • Publication number 20030021714
    • Publication date Jan 30, 2003
    • Hiroki Osumimoto
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Compressor with oil-mist separator
    • Publication number 20020054823
    • Publication date May 9, 2002
    • Takeshi Hida
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Screw compressor
    • Publication number 20010036417
    • Publication date Nov 1, 2001
    • Yasuhiro Hioki
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Screw compressor
    • Publication number 20010000320
    • Publication date Apr 19, 2001
    • Takeshi Hida
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...