Patents by Inventor Yukio Fujishima

Yukio Fujishima 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).

  • Method of operating heat pump
    Patent number: 5241829
    Abstract: A method of operating a heat pump having at least one circuit for circulation of a refrigerant comprising a compressor, a once-through path, complete counterflow type condenser as a high-temperature heat output means, an expansion valve and a low-temperature heat output means (evaporator or a segregated low-stage circuit for circulation of a lower-boiling-point refrigerant), which comprises choosing a supercool degree, which is equal to the difference between a saturation temperature and an outlet temperature of the refrigerant, to satisfy the conditions that a temperature effectiveness of refrigerant liquid as defined by the formula: ##EQU1## is at least 40% and the temperature difference of the denominator is at least 35.degree. C. As a result, boiling water of ca. 100.degree. C. or other high-temperature fluids can be discharged with a large temperature difference.
    Type: Grant
    Filed: March 12, 1992
    Date of Patent: September 7, 1993
    Assignees: Osaka Prefecture Government, Nishiyodo Air Conditioner Co., Ltd.
    Inventors: Toshimasa Irie, Tohru Isoda, Shuhei Miyauchi, Taizo Imoto, Yukio Fujishima, Yasuhiro Hatano, Masami Ogata, Yukitoshi Hatano, Tamotsu Ishikawa, Masayuki Kawabata
  • Powder electroluminescent element comprising inorganic electroluminescent particles and a polyurethane binder
    Patent number: 5069815
    Abstract: A powder electroluminescent element which comprises electroluminescent particles and an organic binder at least partly comprising a polyurethane shows a high emission intensity or brightness and has a prolonged operating life.
    Type: Grant
    Filed: December 1, 1989
    Date of Patent: December 3, 1991
    Assignees: Osaka-Fu, Itoh Seiyu Kabushiki Kaisha
    Inventors: Akira Aoki, Yukio Fujishima, Yusuke Makio, Susumu Kusakawa, Sadaaki Tsuji, Tadashi Okamura