Patents by Inventor Yukiya Sugasaki

Yukiya Sugasaki 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).

  • Simplified apparatus for producing liquid nitrogen
    Patent number: 5327729
    Abstract: In an apparatus for producing liquid nitrogen by supplying to a nitrogen gas separated from the atmosphere and then purified by an air separating device (4) into an insulated container (1) equipped with an extremely low temperature refrigerator, there are provided a pressure sensor (21) for detecting a pressure within a product vessel (20) of the air separating device (4) and a negative pressure sensor (16) for detecting a negative pressure within the insulated vessel (1) respectively. When at least one of both sensors (21) (16) detects a freezing of an impurity gas contained in the supplied nitrogen gas by reaching a predetermined pressure, an operation of the extremely low temperature refrigerator is stopped depending on the detection by one of both the sensors.
    Type: Grant
    Filed: January 19, 1993
    Date of Patent: July 12, 1994
    Assignees: Iwatani Sangyo Kabushiki Kaisha, Iwatani Plantech Corporation
    Inventors: Masayoshi Yanai, Etsuji Kawaguchi, Yukiya Sugasaki, Tsuyoshi Kanegae, Bungo Kondo