Patents by Inventor Hironori Nakai

Hironori Nakai 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).

  • Lubricant supply system and operating method of multisystem lubrication screw compressor
    Patent number: 7347301
    Abstract: An oil refrigeration screw compressor being applied to a refrigeration system etc., in which the problem of strength reduction of a bearing material under high temperatures and that of lifetime reduction of the bearing material due to viscosity lowering of lubricant are solved. A lubricant supply system to a compressor body is divided into a bearing oil supply system for supplying lubricant to each bearing of the compressor body at low pressure and into a temperature control oil supply system for supplying lubricant into the compressor body at high pressure. The bearing oil supply system is a closed circuit oil supply system comprising an oil supply tank, an oil cooler, and an oil supply pump, and the temperature control oil supply system is a closed circuit oil supply system comprising an oil separator and an oil cooler.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: March 25, 2008
    Assignee: Mayekawa Mfg. Co., Ltd.
    Inventors: Yoshimitsu Sekiya, Kiyoshi Tanaka, Shuji Fukano, Hironori Nakai, Yoshifusa Kubota, Teiji Shozu
  • LUBRICANT SUPPLY SYSTEM AND OPERATING METHOD OF MULTISYSTEM LUBRICATION SCREW COMPRESSOR
    Publication number: 20070163840
    Abstract: An oil refrigeration screw compressor being applied to a refrigeration system etc., in which the problem of strength reduction of a bearing material under high temperatures and that of lifetime reduction of the bearing material due to viscosity lowering of lubricant are solved. A lubricant supply system to a compressor body is divided into a bearing oil supply system for supplying lubricant to each bearing of the compressor body at low pressure and into a temperature control oil supply system for supplying lubricant into the compressor body at high pressure. The bearing oil supply system is a closed circuit oil supply system comprising an oil supply tank, an oil cooler, and an oil supply pump, and the temperature control oil supply system is a closed circuit oil supply system comprising an oil separator and an oil cooler.
    Type: Application
    Filed: February 2, 2007
    Publication date: July 19, 2007
    Applicant: MAYEKAWA MFG. CO., LTD.
    Inventors: Yoshimitsu SEKIYA, Kiyoshi TANAKA, Shuji FUKANO, Hironori NAKAI, Yoshifusa KUBOTA, Teiji SHOZU