Patents by Inventor Masashi Fukuda

Masashi Fukuda 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: 7637306
    Abstract: A continuous casting apparatus, continuous casting method and aluminum alloy cast bar enable stable and smooth high-speed casting with a reduced amount of a lubricant and prevent occurrence of breakout and lubricant reaction products, resulting in reduction in ingot failure.
    Type: Grant
    Filed: October 25, 2005
    Date of Patent: December 29, 2009
    Assignee: Show A Denko K.K.
    Inventors: Masashi Fukuda, Masatoshi Fukushima
  • Publication number: 20070131320
    Abstract: High-strength steel sheet excellent in hole-expandability and ductility, characterized by; comprising, in mass %, C: not less than 0.01% and not more than 0.20%, Si: not more than 1.5%, Al: not more than 1.5%, Mn: not less than 0.5% and not more than 3.5%, P: not more than 0.2%, S: not less than 0.0005% and not more than 0.009%, N: not more than 0.009%, Mg: not less than 0.0006% and not more than 0.01%, 0: not more than 0.005% and Ti: not less than 0.01% and not more than 0.20% and/or Nb: not less than 0.01% and not more than 0.10%, with the balance consisting iron and unavoidable impurities, having Mn %, Mg %, S % and O % satisfying equations (1) to (3), and having the structure primarily comprising one or more of ferrite, bainite and martensite. [Mg%]?([O%]/16×0.8)×24??(1) [S%]?([Mg%]/24?[O%]/16×0.8+0.00012)×32??(2) [S%]?0.
    Type: Application
    Filed: December 26, 2003
    Publication date: June 14, 2007
    Inventors: Riki Okamoto, Hirokazu Taniguchi, Masashi Fukuda
  • Patent number: 7170885
    Abstract: A packet switching is performed according to a routing information for relaying particular packets which is produced by the route computation based on the information of a received packet and the kept parts-of-routing-information useful as a basis for the route computation. At this time, the route through which the packet is relayed is determined on the basis of the kept parts-of-routing-information before the route computation. Then, the received packet is relayed according to the determined route. Next, a new routing information is produced by the route computation based on the information of the received packet and the parts-of-routing-information. Thereafter, the succeeding packets of the same route are relayed on the basis of the new routing information.
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: January 30, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Nagayuki Hirota, Hiroshi Sekino, Shigeki Morimoto, Yoshihito Sako, Masashi Fukuda
  • Publication number: 20060231166
    Abstract: This invention provides a high-strength hot-rolled steel sheet having strength of at least 980 N/mm2 at a sheet thickness of from about 1.0 to about 6.0 mm and excellent in hole expandability, ductility and ability of phosphate coating, which steel sheet is directed to automotive suspension components that are subjected to pressing. The high-strength hot-rolled steel sheet contains, in terms of a mass %, C: 0.01 to 0.09%, Si: 0.05 to 1.5%, Mn: 0.5 to 3.2%, Al: 0.003 to 1.5%, P: 0.03% or below, S: 0.005% or below, Ti: 0.10 to 0.25%, Nb: 0.01 to 0.05% and the balance consisting of iron and unavoidable impurities; satisfies all of the following formulas <1>to <3>: 0.9?48/12×C/Ti<1.7??<1> 50,227×C?4,479×Mn>?9,860??<2> 811×C+135×Mn+602×Ti+794×Nb>465??<3>, and has strength of at least 980 N/mm2.
    Type: Application
    Filed: December 26, 2003
    Publication date: October 19, 2006
    Inventors: Riki Okamoto, Hirokazu Taniguchi, Masashi Fukuda
  • Patent number: 7069897
    Abstract: A forged piston for an internal combustion engine formed from an aluminum alloy containing silicon in an amount of 6 to 25 mass %, includes an oil ring groove section (12) and a skirt section (13). The ratio (A/B) of the average size (A) of eutectic silicon grains contained in the oil ring groove section to the average size (B) of eutectic silicon grains contained in the frontal end portion (18) of the skirt section is at least 1.5. The average size (A) is at least 4 ?m. With the configuration such that the average size (B) is small and that the average size (A) is large, the skirt section exhibits excellent forgeability and the oil ring groove section exhibits reliable mechanical workability and improved wear resistance.
    Type: Grant
    Filed: July 23, 2002
    Date of Patent: July 4, 2006
    Assignee: Showa Denko K.K.
    Inventors: Shigeru Yanagimoto, Masashi Fukuda, Masahiro Sato
  • Publication number: 20060090875
    Abstract: A continuous casting apparatus, continuous casting method and aluminum alloy cast bar enable stable and smooth high-speed casting with a reduced amount of a lubricant and prevent occurrence of breakout and lubricant reaction products, resulting in reduction in ingot failure.
    Type: Application
    Filed: October 25, 2005
    Publication date: May 4, 2006
    Inventors: Masashi Fukuda, Masatoshi Fukushima
  • Patent number: 6948548
    Abstract: An apparatus for casting an ingot includes a molten metal reservoir (51) positioned at an upper portion, a casting chamber (5) positioned at a lower portion and a partition wall (3) between the reservoir and the chamber, a spruce (7) formed in the partition wall, an opening/closing plug (8) for opening and closing the sprue and control means for controlling an opening and closing operation of the plug. The casing chamber is defined in a mold (1) that includes a lower mold member (4), a side mold member (2) and the partition wall (3) that constitutes an upper mold member. At least one of the lower mold member, side mold member and upper mold member includes a plurality of divided sections (21,22) in accordance with a shape of a cast ingot C.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: September 27, 2005
    Assignee: Showa Denko K.K.
    Inventors: Shigeru Yanagimoto, Masashi Fukuda, Tomoo Uchida, Kunio Hirano
  • Patent number: 6889746
    Abstract: A material for plastic working is produced by the steps of using a mold having a mold cavity (16) partially defined by an end surface of a stopper (13) for closing a molten metal inlet (101), teeming molten metal (10) into the mold cavity through the inlet and cooling the molten metal to thereby attain unidirectional solidification of the molten metal. Regulation of the cooling rate enables the mean grain size to be graded in the direction from the cooled face (B surface) to the opposing face (T surface) and the added components to increase in the same direction. It is possible to obtain a material for plastic working that has a selected portion exhibiting an excellent function.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: May 10, 2005
    Assignee: Showa Denko K.K.
    Inventors: Shigeru Yanagimoto, Masashi Fukuda, Tomoo Uchida, Kunio Hirano
  • Publication number: 20040261615
    Abstract: A forged piston for an internal combustion engine formed from an aluminum alloy containing silicon in an amount of 6 to 25 mass %, includes an oil ring groove section (12) and a skirt section (13). The ratio (A/B) of the average size (A) of eutectic silicon grains contained in the oil ring groove section to the average size (B) of eutectic silicon grains contained in the frontal end portion (18) of the skirt section is at least 1.5. The average size (A) is at least 4 &mgr;m. With the configuration such that the average size (B) is small and that the average size (A) is large, the skirt section exhibits excellent forgeability and the oil ring groove section exhibits reliable mechanical workability and improved wear resistance.
    Type: Application
    Filed: August 16, 2004
    Publication date: December 30, 2004
    Inventors: Shigeru Yanagimoto, Masashi Fukuda, Masahiro Sato
  • Publication number: 20040211544
    Abstract: The present invention provides a casting apparatus 10A including a mold 12 having a molten metal inlet 21 at a first end portion of a partition wall 12a, and an open/close plug 13 for opening and closing the inlet 21 of the mold 12, the plug 13 being brought into contact with or detached from an inlet-defining wall, in which molten metal 1′ is teemed into the mold 12 when the plug 13 is detached from the inlet-defining wall, and teeming of the molten metal 1′ into the mold 12 is stopped when the plug 13 is brought into contact with the inlet-defining wall, wherein a member 20 having the inlet-defining wall is separable from the mold 12, and the member 20 having the inlet-defining wall is removably provided on the mold 12.
    Type: Application
    Filed: April 30, 2002
    Publication date: October 28, 2004
    Inventors: Shigeru Yanagimoto, Masashi Fukuda, Tomoo Uchida, Kunio Hirano
  • Publication number: 20030226652
    Abstract: A material for plastic working is produced by the steps of using a mold having a mold cavity (16) partially defined by an end surface of a stopper (13) for closing a molten metal inlet (101), teeming molten metal (10) into the mold cavity through the inlet and cooling the molten metal to thereby attain unidirectional solidification of the molten metal. Regulation of the cooling rate enables the mean grain size to be graded in the direction from the cooled face (B surface) to the opposing face (T surface) and the added components to increase in the same direction. It is possible to obtain a material for plastic working that has a selected portion exhibiting an excellent function.
    Type: Application
    Filed: October 28, 2002
    Publication date: December 11, 2003
    Inventors: Shigeru Yanagimoto, Masashi Fukuda, Tomoo Uchida, Kunio Hirano
  • Publication number: 20030180566
    Abstract: A metal ingot (1) solidified through unidirectional forced-cooling from a cooling member (100) to an end surface of a stopper (13), by the cooling member, of molten metal (1′) teeming via a molten metal inlet (101) of a closable mold (12) into a mold cavity (16) is plastic-worked at percent working equl to or higher than a predetermined level to obtain a plastic-worked member. The end surface of the stopper and the cooling member partially define the mold cavity. The plastic-worked member is improved in mechanical characteristics that have heretofore been inferior on the side of the end surface of the stopper and is increased in entire strength.
    Type: Application
    Filed: October 28, 2002
    Publication date: September 25, 2003
    Inventors: Shigeru Yanagimoto, Kunio Hirano, Masashi Fukuda, Tomoo Uchida
  • Publication number: 20030123429
    Abstract: A packet switching is performed according to a routing information for relaying particular packets which is produced by the route computation based on the information of a received packet and the kept parts-of-routing-information useful as a basis for the route computation. At this time, the route through which the packet is relayed is determined on the basis of the kept parts-of-routing-information before the route computation. Then, the received packet is relayed according to the determined route. Next, a new routing information is produced by the route computation based on the information of the received packet and the parts-of-routing-information. Thereafter, the succeeding packets of the same route are relayed on the basis of the new routing information.
    Type: Application
    Filed: February 11, 2003
    Publication date: July 3, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Nagayuki Hirota, Hiroshi Sekino, Shigeki Morimoto, Yoshihito Sako, Masashi Fukuda
  • Patent number: 6542496
    Abstract: A packet switching is performed according to a routing information for relaying particular packets which is produced by the route computation based on the information of a received packet and the kept parts-of-routing-information useful as a basis for the route computation. At this time, the route through which the packet is relayed is determined on the basis of the kept parts-of-routing-information before the route computation. Then, the received packet is relayed according to the determined route. Next, a new routing information is produced by the route computation based on the information of the received packet and the parts-of-routing-information. Thereafter, the succeeding packets of the same route are relayed on the basis of the new routing information.
    Type: Grant
    Filed: May 27, 1999
    Date of Patent: April 1, 2003
    Assignees: Hitachi, Ltd., Hitachi Information Technology Co., Ltd.
    Inventors: Nagayuki Hirota, Hiroshi Sekino, Shigeki Morimoto, Yoshihito Sako, Masashi Fukuda
  • Publication number: 20020170700
    Abstract: [Purpose] To provide, in relation to casting of materials to be subjected to plastic working such as cold forging, hot forging, enclosed forging, rolling, extrusion, and roll-forming of metals, including nonferrous metals, such as aluminum and magnesium (inclusive of respective alloys), and ferrous metals (i.e., iron and steel) or to direct casting of products (i.e.
    Type: Application
    Filed: April 30, 2002
    Publication date: November 21, 2002
    Inventors: Shigeru Yanagimoto, Masashi Fukuda, Tomoo Uchida, Kunio Hirano, Takafumi Nakahara, Tooru Kuzuhara
  • Patent number: 5989365
    Abstract: In a metallic ingot used as a forging stock, high dimensional accuracy, small dispersion of weight, good inner quality, and small radius of meniscus are required. In the metallic ingot fulfilling these requirements, the metallic melt 7 is completely filled the mold comprising a sprue 4 closed after pouring of the melt and is forcedly solidified at its bottom by the cooling plate 1. The crystal grains grow almost parallel to the rising direction of the upper surface of the melt 7. The ingot has no cutting surface on the casting surface.
    Type: Grant
    Filed: April 22, 1998
    Date of Patent: November 23, 1999
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Shigeru Yanagimoto, Masashi Fukuda, Yoshiaki Sutou, Takayuki Kato
  • Patent number: 5769147
    Abstract: In a metallic ingot used as a forging stock, high dimensional accuracy, small dispersion of weight, good inner quality, and small radius of meniscus are required. In the metallic ingot fulfilling these requirements, the metallic melt 7 is completely filled the mold comprising a sprue 4 closed after pouring of the melt and is forcedly solidified at its bottom by the cooling plate 1. The crystal grains grow almost parallel to the rising direction of the upper surface of the melt 7. The ingot has no cutting surface on the casting surface.
    Type: Grant
    Filed: December 6, 1995
    Date of Patent: June 23, 1998
    Assignee: Showa Denko Kabushikikaisha
    Inventors: Shigeru Yanagimoto, Masashi Fukuda, Yoshiaki Sutou, Takayuki Kato
  • Patent number: 5761435
    Abstract: A multiprocessor bridge construction allows ports that are operable under a spanning tree protocol to coexist with ports that are inoperable under the spanning tree protocol, thus making it possible to improve the frame-repeating capability of the bridge, to equip the bridge with a large number of ports, and to divide the spanning tree topology into a plurality of portions to be managed.
    Type: Grant
    Filed: March 10, 1995
    Date of Patent: June 2, 1998
    Assignees: Hitachi, Ltd., Hitachi Computer Engineering Co., Ltd.
    Inventors: Masashi Fukuda, Shigeki Morimoto, Toshihiko Murakami, Takunori Yoneno, Hideyuki Matsuo, Hirpyuki Sakoda
  • Patent number: 5327425
    Abstract: A Local Area Network (LAN) is disclosed in which each node includes means for receiving clock signal information from an external network, which may by way of example be another LAN or a wide area network (WAN), and for generating therefrom clock signals for each node of the local network to accommodate synchronous information exchanges with the external network. Any one of the nodes of the local LAN network may act as a Control Node, and any one of the remaining nodes upon instruction from the Control Node may act as a primary Transmission Node for generating clock signals based upon the external network clock signals for all of the nodes of the local LAN network.
    Type: Grant
    Filed: September 10, 1992
    Date of Patent: July 5, 1994
    Assignees: Hitachi, Ltd., Hitachi Computer Engineering Co., Ltd., Hitachi Software Engineering Co., Ltd.
    Inventors: Tokuhiro Niwa, Masashi Fukuda, Ryouichi Matusita, Tutomu Koita, Ihei Kajiya, Hiroshi Satou