Patents by Inventor Itsuo Nakazaki

Itsuo Nakazaki 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).

  • Refrigerating device, refrigerator, compressor, and gas-liguid separator
    Publication number: 20060168996
    Abstract: An object is to provide a refrigerating device capable of realizing a high-efficiency operation in a case where there is disposed, in a refrigerating cycle, a compressor having: a plurality of heat sinks which function in different temperature zones; and an intermediate-pressure portion. The refrigerating device comprises: the compressor having the intermediate-pressure portion; and a radiator connected to a discharge side of the compressor, a refrigerant pipe on an outlet side of the radiator is branched, one of the branched refrigerant pipes is provided with a first heat absorbing unit including a first pressure reducing section and a first heat sink, and the other refrigerant pipe is provided with a second heat absorbing unit including a second pressure reducing section and a second heat sink.
    Type: Application
    Filed: January 31, 2006
    Publication date: August 3, 2006
    Inventors: Satoshi Imai, Hiroyuki Itsuki, Hiroshi Mukaiyama, Masahisa Otake, Etsushi Nagae, Itsuo Nakazaki, Akira Sugawara
  • Stirling refrigerator
    Patent number: 6546738
    Abstract: A Stirling refrigerator, which prevents oil rising, makes oil seal bellows have long-life, and includes a housing, cylinder, piston, piston rod and an oil seal bellows. The oil seal bellows seals a space between the housing and the cylinder, wherein a tip end of the oil seal bellows is sealed and fixed on the piston or on the piston rod inside the cylinder, and a base end of the oil seal bellows is installed on the housing. The oil seal bellows reciprocates with a stroke, wherein the tip end of the oil seal bellows is compressed to a compression side from a position of free length then returns to the position of free length.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: April 15, 2003
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Hiroshi Sekiya, Takahiro Nakamura, Itsuo Nakazaki, Takashi Inoue, Ryousuke Tuihiji, Takeo Komatsubara, Hiroshi Kanai, Kazuya Sato, Takayuki Mizuno, Eiji Fukuda, Yasuo Sakamoto, Hiroshi Nishikawa, Denji Mashimo
  • Stirling refrigerator
    Publication number: 20030019217
    Abstract: A Stirling refrigerator, which prevents oil rising, makes oil seal bellows have long-life, and includes a housing, cylinder, piston, piston rod and an oil seal bellows. The oil seal bellows seals a space between the housing and the cylinder, wherein a tip end of the oil seal bellows is sealed and fixed on the piston or on the piston rod inside the cylinder, and a base end of the oil seal bellows is installed on the housing. The oil seal bellows reciprocates with a stroke, wherein the tip end of the oil seal bellows is compressed to a compression side from a position of free length then returns to the position of free length.
    Type: Application
    Filed: July 17, 2002
    Publication date: January 30, 2003
    Inventors: Hiroshi Sekiya, Takahiro Nakamura, Itsuo Nakazaki, Takashi Inoue, Ryousuke Tuihiji, Takeo Komatsubara, Hiroshi Kanai, Kazuya Sato, Takayuki Mizuno, Eiji Fukuda, Yasuo Sakamoto, Hiroshi Nishikawa, Denji Mashimo