Patents by Inventor Hideaki Tsukamoto

Hideaki Tsukamoto 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).

  • Reciprocating compressor
    Publication number: 20070231167
    Abstract: A reciprocating compressor is disclosed which has a valve construction using plural discharge ports, plural reed valves and plural valve backers to lower the discharge resistance and improve the compression efficiency.
    Type: Application
    Filed: April 19, 2006
    Publication date: October 4, 2007
    Inventors: Hideaki Tsukamoto, Ryuji Watanabe, Tsuyoshi Ohyama
  • Toner for developing a digital image
    Patent number: 5541030
    Abstract: A toner for developing a digital-image and being fused onto a recording medium by heat and pressure, said toner comprising: a coloring agent; a first polyester resin having a softening temperature of 105.degree. C..about.112.degree. C.; a second polyester resin having a softening temperature of 150.degree. C..about.155.degree. C. wherein a mix ratio of the first resin to the second resin is between from 75/25 to 40/60 and an oxided polyolefine. Said toner has a characteristics of a high reproductivity of a digital dot image, a high fixing-strength, a wide range of an offset boundary temperature and an anti-filming property.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: July 30, 1996
    Assignee: Minolta Co., Ltd.
    Inventors: Tetsuo Sano, Masao Nakajima, Hideaki Tsukamoto, Yoshitaka Sekiguchi, Hiroyuki Fukuda