Patents by Inventor Masaki Matsumoto

Masaki Matsumoto 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).

  • Patent number: 5011652
    Abstract: A container-outer-periphery pool in which water is stored is provided between a primary containment vessel and a reactor building, and outside of a pressure suppression pool. Consequently, the natural heat transfer capabilities of reactor facilities is enhanced, and the inherent safety of the reactor facilities is improved.
    Type: Grant
    Filed: September 18, 1987
    Date of Patent: April 30, 1991
    Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd.
    Inventors: Kenji Tominaga, Minoru Miki, Tooru Takahashi, Tetsuo Horiuchi, Hideo Morishima, Takashi Nakayama, Kumiaki Moriya, Masaki Matsumoto, Minoru Akita, Tsuyoshi Niino, Kanehiro Ochiai, Akihiko Shiozawa, Yuichi Uchiyama, Toyoharu Yasuno, Kenji Moriya, Shouichirou Kinoshita, Kazuo Kage, Ryuji Kubota
  • Patent number: 4877574
    Abstract: A natural circulation reactor includes a reactor pressure vessel, a cylindrical shroud disposed within the reactor pressure vessel to surround a reactor core and to extend to a position above the reactor core, and a coolant descending passage defined between the reactor pressure vessel and the shroud for allowing the coolant discharged from the top of the reactor core to be again supplied to the bottom of the reactor core. In such a natural circulation reactor, a liquid level of coolant in the coolant descending passage is adjusted on the basis of a reactor power request signal at a position below a liquid level of coolant in the shroud, and thus reactor power is controlled so that it may reach a predetermined reactor power by adjusting the liquid level of coolant in the coolant descending passage.
    Type: Grant
    Filed: March 2, 1988
    Date of Patent: October 31, 1989
    Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd.
    Inventors: Hiroaki Suzuki, Yoshiyuki Kataoka, Michio Murase, Kotaro Inoue, Isao Sumida, Shozo Yamanari, Masaki Matsumoto, Satoshi Miura, Koji Hashimoto
  • Patent number: 4495142
    Abstract: The nuclear reactor container of a boiling water reactor has a dry well and a pressure suppression chamber. The level of the radioactivity in the cooling water filling the pressure suppression chamber is measured by a liquid radiation monitor. An iodine monitor measures a level of the radioactivity of the iodine in the space above the surface of cooling water in the pressure suppression chamber, while a noble gas monitor measures a level of the radioactivity of noble gas in the same space. Outputs from the liquid radiation monitor, the iodine monitor and the noble gas monitor are delivered to an accident judging device which makes judgement as to occurrence of perforation of fuel rods and melt down of fuel rods in the event of a Loss Of Coolant Accident (LOCA), the result of which is displayed at a display device.
    Type: Grant
    Filed: March 19, 1981
    Date of Patent: January 22, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Tadakazu Nakayama, Ryozo Tsuruoka, Masaki Matsumoto
  • Patent number: 4052242
    Abstract: A novel product wherein cut webs for wefts (which are abbreviated as weft webs) are successively connected in the warp direction by selvedges adhered onto both the margins of the weft webs, is provided by circulating two right and left heated belts having thereon a hot-melt type adhesive in a tacky state and spaced by the length of each of weft webs of a large width mentioned below; adhering onto each of the belts, selvedge materials which constitute the selvedges of final product and are hereinafter abbreviated merely as selvedges; suddenly dropping the two belts having the selvedges adhered thereonto, on the lower side circulating route of the belts, down onto one of weft webs loaded successively and at a given gap on a conveyer circulating below the belts perpendicularly thereto, over the length corresponding to the width of the weft webs, when both the ends of one of the weft webs and the corresponding belts overlap each other, thereby to adhere both the ends of the weft web onto the corresponding selvedg
    Type: Grant
    Filed: January 21, 1976
    Date of Patent: October 4, 1977
    Assignees: Polymer Processing Research Institute Ltd., Sekisui Kacaku Kogyo Kabushiki Kaisha
    Inventors: Masahide Yazawa, Haruhisa Tani, Masaki Matsumoto, Yasuo Sasaki
  • Patent number: 4052243
    Abstract: An improved method for effecting cross-lamination of wide warp and weft webs is provided, wherein a continuous row of cut weft webs having a length corresponding to the width of the warp web to be cross-laminated thereto and arranged in side by side relationship is temporarily prepared on a warp material which is (1) a belt means from which said row of weft webs is transferred onto a warp web in order to be fixed thereto for effecting cross-lamination, (2) a warp web backed up by a belt means from which said row is peeled off in the state loaded on the warp web in order to be fixed thereto for effecting cross-lamination, or (3) a warp web itself to which said row is fixed for effecting cross-lamination, so that the warp material travelling crosswise over the cut weft web at a vertical distance apart therefrom and having been wetted with a liquid having adhesion property to the surface thereof facing said cut weft webs is subjected to successive reciprocating vertical motions so as to touch and pick up the cut
    Type: Grant
    Filed: July 27, 1976
    Date of Patent: October 4, 1977
    Assignees: Polymer Processing Research Institute Ltd., Sekisui Kagaku Kogyo Kabushiki Kaisha
    Inventors: Masahide Yazawa, Haruhisa Tani, Masaki Matsumoto, Yasuo Sasaki
  • Patent number: 3953909
    Abstract: A stabilized laterally spread reticular web of split fibers is produced by feeding a web of split fibers onto a plurality of belts in side-by-side arrangement on the inlet side thereof, the belts circulating between an inlet-side roller and an outlet-side roller, the advancing route of the belts being planely diverging and the returning route of the belts being planely converging, making the surfaces of at least the belts among the plurality of belts, on which both the side edge parts of the web are placed, wet with a liquid, preferably water containing a small amount of a surfactant, laterally spreading the web on the advancing route of the belts to a given lateral spreading ratio, while temporarily fixing both the side edge parts of the web onto the belts by the surface tension of the liquid, withdrawing the web onto a rotating hot drum through a guide rod, applying suctions to both the side edge parts of the web on the drum, in order to laterally spread slacking side edge parts of the web outwards by the s
    Type: Grant
    Filed: August 23, 1974
    Date of Patent: May 4, 1976
    Assignee: Polymer Processing Research Institute Ltd.
    Inventors: Masahide Yazawa, Kazuhiko Kurihara, Haruhisa Tani, Masaki Matsumoto