Patents by Inventor Sei Ueda

Sei Ueda 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).

  • Two-cylinder type rotary compressor
    Patent number: 4764097
    Abstract: A two-cylinder type rotary compressor has two compression elements each provided with a cylinder. First and second intake conduits are respectively formed in the cylinders so as to be in parallel to an intermediate partition plate disposed between the cylinders. Each one end of first and second intake tubes is connected to each of the intake conduits and each other end of the intake tubes is connected to a common intake pipe which is provided outside a hermetic casing.
    Type: Grant
    Filed: March 23, 1987
    Date of Patent: August 16, 1988
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takuho Hirahara, Susumu Kawaguchi, Sei Ueda, Kazuhiro Nakane
  • Rotary compressor
    Patent number: 4704076
    Abstract: An oil hole is formed in a thrust-bearing surface in the eccentric part of a rotary shaft so that a given amount of lubricating oil is always maintained in the oil hole, whereby shortage of oil does not occur at the time of restarting of the rotary compressor after a long term pause of the operation.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: November 3, 1987
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Susumu Kawaguchi, Takuho Hirahara, Kazuhiro Nakane, Sei Ueda
  • Rotary compressor
    Patent number: 4676726
    Abstract: An eccentric part of a crank shaft rotated in a cylinder is made a large diameter and a thin-walled rolling piston is fitted to the outer circumference of the eccentric part so that an injection opening for supplying a refrigerant into the cylinder is covered in a certain section by only a side surface of the eccentric part or both the side surfaces of the rolling piston and the eccentric part.
    Type: Grant
    Filed: November 20, 1985
    Date of Patent: June 30, 1987
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Susumu Kawaguchi, Takuho Hirahara, Kazuhiro Nakane, Sei Ueda
  • Rotary compressor
    Patent number: 4636152
    Abstract: An eccentric part of a crank shaft rotated in a cylinder is made large in diameter and a thin-walled rolling piston is fitted to the outer circumference of the eccentric part so that an injection opening for supplying a refrigerant into the cylinder, the opening being formed in a bearing plate, is covered by only a side surface of the rolling piston or both the side surfaces of the rolling piston and the eccentric part.
    Type: Grant
    Filed: July 30, 1985
    Date of Patent: January 13, 1987
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Susumu Kawaguchi, Takuho Hirahara, Kazuhiro Nakane, Sei Ueda
  • Lubrication for rotary compressor vane
    Patent number: 4592705
    Abstract: The vane slot 20 and lubricating oil passageway 21 in the cylinder member 3 of a rotary vane compressor are configured such that the radial length of the slot wall 20a on the low pressure side of the vane 5 is less than that of the opposite wall 20b on the high pressure side. Such a shortened low pressure side slot wall reduces wear by providing improved lubrication at the critical inward edge of the slot (F1), and facilitates the flushing away of abrasive particles formed during the initial seating of the vane. For a horizontal installation the lubricating oil level is maintained below the radially outermost edge of the wall 20a to prevent the oil from being drawn into the low pressure chamber 17 when the compressor is stopped.
    Type: Grant
    Filed: February 25, 1985
    Date of Patent: June 3, 1986
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Sei Ueda, Takuho Hirahara, Koji Ishijima, Fumiaki Sano, Kazutomo Asami, Fumio Wada