Patents by Inventor Takeyuki Watanabe

Takeyuki Watanabe 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: 6998752
    Abstract: Conductor bars 7a and end rings 7b, 7c of a rotor 5 of a rotary electric machine are made of an aluminum material. The end rings 7b, 7c are electrically and mechanically joined to the opposite ends of the conductor bars 7a with friction stir welding.
    Type: Grant
    Filed: December 27, 2000
    Date of Patent: February 14, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Yasuhara, Toshiaki Ueda, Takeyuki Watanabe
  • Publication number: 20040113508
    Abstract: Conductor bars 7a and end rings 7b, 7c of a rotor 5 of a rotary electric machine are made of an aluminum material. The end rings 7b, 7c are electrically and mechanically joined to the opposite ends of the conductor bars 7a with friction stir welding.
    Type: Application
    Filed: October 8, 2003
    Publication date: June 17, 2004
    Inventors: Takashi Yasuhara, Toshiaki Ueda, Takeyuki Watanabe
  • Patent number: 5267515
    Abstract: A vehicle body, such as, for example, a railway passenger vehicle body, which includes an external body sheeting formed of opposite sides and a roof and having an internal floor extending between the sides. The sides, above the level of the internal floor, and the roof each include a number of extruded metal plates forming the external body sheeting and integral ribs, extending in a longitudinal direction of the vehicle body, are provided on inner faces of the extruded metal plates. The extruded metal plates are welded together at weld lines extending in a longitudinal direction of the vehicle body.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: December 7, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Hitoshi Tsuruda, Morishige Hattori, Masato Okazaki, Hiroyuki Yamada, Kiyotaka Kikumoto, Takeyuki Watanabe, Ryoichi Takayama, Sumio Okuno
  • Patent number: 5098007
    Abstract: A method of manufacturing a portion of a vehicle body, with the portion being at least part of one of a side, an end, a roof, and a floor plate of the body. The method comprises the steps of providing extruded metal plates formed of a light alloy metal with each of the plates having welding edges and integral structural ribs extending parallel to the welding edges on the inner face of the plates, arranging the plates on a jig in position for welding of the welding edges, without an overlap of the welding edges, restraining the plates in a welding position on the jig, and welding the welding edges on the jig by one-sided welding from an inner side of the plates to produce continuous welds. Frame members extending transversely to the structural ribs can be welded on the same side without moving the plate from the jig.
    Type: Grant
    Filed: January 10, 1990
    Date of Patent: March 24, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Hitoshi Tsuruda, Morishige Hattori, Masato Okazaki, Hiroyuki Yamada, Kiyotaka Kikumoto, Takeyuki Watanabe, Ryoichi Takayama, Sumio Okuno
  • Patent number: 4966082
    Abstract: A rolling-stock underframe construction comprising longitudinal side sills, end sills connecting opposite longitudinal ends of one side sills to opposite longitudinal ends of the other side sill, body bolsters respectively disposed at positions corresponding to trucks, and center sills extending between the end sills and the corresponding body bolsters in parallel to the side sills; and a floor member fixedly disposed in an area defined by the side sills and the end sills. The floor member comprises an upper plate forming, a lower plate forming, and a corrugated plate disposed between the upper plate and lower plate. The corrugated plate includes an alternate arrangement of ridges and longitudinal furrows and is joined to both the upper and lower plate.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: October 30, 1990
    Assignees: Hitachi, Ltd., Kasado Kikai Co., Ltd.
    Inventors: Michifumi Takeichi, Hisashi Tani, Katsuyuki Terada, Takeyuki Watanabe, Sumio Okuno, Masayuki Dogen