Patents by Inventor Keiji Sakaino

Keiji Sakaino 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).

  • Scroll type compressor having a convex surface on the sub frame bushing
    Patent number: 5407334
    Abstract: A scroll type compressor having a main frame, a sub frame and a crankshaft rotatably mounted in the main frame and the sub frame via a main frame bushing and a sub frame bushing, further includes a fixed scroll and an orbiting scroll cooperable with the fixed scroll to compress gas, the orbiting scroll being drivingly mounted on the eccentric shaft portion. A barrel shaped band portion faces the crankshaft and presents a convex surface in at least one of a respective force direction of a compressive load generated in a compression chamber formed between the orbiting scroll and the fixed scroll, and a reactive force direction of a centrifugal load generated by a revolution movement of the orbiting scroll and rotary movements of upper and lower balance weights. The barrel shaped band portion is formed on the sub frame bushing.
    Type: Grant
    Filed: December 29, 1993
    Date of Patent: April 18, 1995
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Fumiaki Sano, Masahiko Oide, Toshiyuki Nakamura, Hiroshi Ogawa, Norihide Kobayashi, Yoshinori Shirafuji, Takashi Yamamoto, Keiji Sakaino
  • Scroll type compressor having curved bearing surfaces
    Patent number: 5312229
    Abstract: A scroll type compressor comprising: a crankshaft having an eccentric shaft portion formed thereon; an orbiting scroll which is given torque by the crankshaft through the eccentric shaft portion; and bearing means for rotatably supporting the crankshaft; wherein at least one of the eccentric shaft portion and the bearing means is constituted by a rotatably engaged bushing and a curved surface portion.
    Type: Grant
    Filed: April 7, 1993
    Date of Patent: May 17, 1994
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Fumiaki Sano, Masahiko Oide, Toshiyuki Nakamura, Hiroshi Ogawa, Norihide Kobayashi, Yoshinori Shirafuji, Takashi Yamamoto, Keiji Sakaino
  • Scroll type compressor having curved surface portions between the shaft and bearing means
    Patent number: 5222881
    Abstract: A scroll type compressor comprising: a crankshaft having an eccentric shaft portion formed thereon; an orbiting scroll which is given torque by the crankshaft through the eccentric shaft portion; and bearing means for rotatably supporting the crankshaft; wherein at least one of the eccentric shaft portion and the bearing means is constituted by a rotatably engaged bushing and a curved surface portion.
    Type: Grant
    Filed: February 12, 1992
    Date of Patent: June 29, 1993
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Fumiaki Sano, Masahiko Oide, Toshiyuki Nakamura, Hiroshi Ogawa, Norihide Kobayashi, Yoshinori Shirafuji, Takashi Yamamoto, Keiji Sakaino