Patents by Inventor Ryoji KAWAI

Ryoji KAWAI 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).

  • Fluid machine
    Patent number: 11149734
    Abstract: Provided is a fluid machine configured such that liquid supplied to a working chamber from the outside of the fluid machine is dispersed extensively in the working chamber. This fluid machine is constituted of a screw rotor and a casing for accommodating the screw rotor and is provided with a liquid supply section for supplying liquid into a working chamber from the outside. The liquid supply section is configured so that liquid is dispersed in the longitudinal direction of the tooth groove of the screw rotor rather than in the width direction thereof.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: October 19, 2021
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Kotaro Chiba, Masahiko Takano, Toshikazu Harashima, Kosuke Sadakata, Kentaro Yamamoto, Takeshi Tsuchiya, Masanao Kotani, Ryoji Kawai, Minako Kanada
  • Air compressor
    Patent number: 10995756
    Abstract: Provided is an air compressor which helps to attain a proper discharge air temperature and which is superior in energy saving property.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: May 4, 2021
    Assignee: Hitachi, Ltd.
    Inventors: Masanao Kotani, Takeshi Tsuchiya, Ryoji Kawai, Kotaro Chiba, Minako Kanada, Sachio Sekiya
  • Air compressor having an oil separator, an oil cooler, first and second evaporators, and wherein intake air and the oil are simultaneously cooled in the first and second evaporators
    Patent number: 10920760
    Abstract: An oil—cooled air compressor is provided with: an oil—cooled air compressor for compressing sucked-in air and discharging the compressed air; an oil separator for separating the compressed air and lubricating oil, which are discharged from the air compressor body; an oil cooler for cooling, by outside air, lubricating oil discharged from the oil separator; oil supply pipe passage for supplying lubricating oil, which is discharged from the oil cooler, to a bearing of the air compressor body and to an intermediate section in the process of compression by the air compressor; and an after-cooler for cooling, by outside air, air discharged from the oil separator. The oil-cooled air compressor in which the air compressor, the oil separator, the oil cooler, and the after-cooler are connected to supply high-pressure air to the outside of the compressor is provided with a vapor compression type refrigeration cycle.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: February 16, 2021
    Assignee: Hitachi, Ltd.
    Inventors: Masanao Kotani, Takeshi Tsuchiya, Ryoji Kawai, Sachio Sekiya
  • Air Compressor
    Publication number: 20190242382
    Abstract: Provided is an air compressor which helps to attain a proper discharge air temperature and which is superior in energy saving property.
    Type: Application
    Filed: March 24, 2017
    Publication date: August 8, 2019
    Inventors: Masanao KOTANI, Takeshi TSUCHIYA, Ryoji KAWAI, Kotaro CHIBA, Minako KANADA, Sachio SEKIYA
  • Fluid Machine
    Publication number: 20190170143
    Abstract: Provided is a fluid machine configured such that liquid supplied to a working chamber from the outside of the fluid machine is dispersed extensively in the working chamber. This fluid machine is constituted of a screw rotor and a casing for accommodating the screw rotor and is provided with a liquid supply section for supplying liquid into a working chamber from the outside. The liquid supply section is configured so that liquid is dispersed in the longitudinal direction of the tooth groove of the screw rotor rather than in the width direction thereof.
    Type: Application
    Filed: August 22, 2017
    Publication date: June 6, 2019
    Inventors: Kotaro CHIBA, Masahiko TAKANO, Toshikazu HARASHIMA, Kosuke SADAKATA, Kentaro YAMAMOTO, Takeshi TSUCHIYA, Masanao KOTANI, Ryoji KAWAI, Minako KANADA
  • Air Compressor
    Publication number: 20190136843
    Abstract: Provided is an air compressor improved in terms of reliability by taking into consideration of the condensation of the water vapor in the compressed air.
    Type: Application
    Filed: June 10, 2016
    Publication date: May 9, 2019
    Inventors: Ryoji KAWAI, Masanao KOTANI, Takeshi TSUCHIYA, Kohtaro CHIBA, Minako KANADA
  • Air Compressor
    Publication number: 20190024651
    Abstract: An oil—cooled air compressor is provided with: an oil—cooled air compressor for compressing sucked-in air and discharging the compressed air; an oil separator for separating the compressed air and lubricating oil, which are discharged from the air compressor body; an oil cooler for cooling, by outside air, lubricating oil discharged from the oil separator; oil supply pipe passage for supplying lubricating oil, which is discharged from the oil cooler, to a bearing of the air compressor body and to an intermediate section in the process of compression by the air compressor; and an after-cooler for cooling, by outside air, air discharged from the oil separator. The oil-cooled air compressor in which the air compressor, the oil separator, the oil cooler, and the after-cooler are connected to supply high-pressure air to the outside of the compressor is provided with a vapor compression type refrigeration cycle.
    Type: Application
    Filed: October 19, 2016
    Publication date: January 24, 2019
    Inventors: Masanao KOTANI, Takeshi TSUCHIYA, Ryoji KAWAI, Sachio SEKIYA