Patents by Inventor Hiroshi Higaki

Hiroshi Higaki 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).

  • Publication number: 20020035947
    Abstract: A car body 8 is supported on a bogie frame 4 through an air spring 5. Along to a width direction of the car body 8, to the bogie frame 4 a torsion bar 11 is provided. At both ends of the torsion bar 11, links 15 and 15 for inclining to direct for an inner side of the car body 8 through levers 13 and 13 are provided. Accordingly, a rolling displacement of the both ends of the car body is restricted and an upper and lower displacement in the same phase is not restricted. According to an occurrence of an excess centrifugal acceleration which acts on the car body 8, a car body inclination according to a link mechanism can be operated. For this reason, a light weight structure and a low cost structure can be attained. An inclination device having a light weight structure, a left and right riding good feeling in the passenger in a car, and a high fail-safe characteristic can be obtained.
    Type: Application
    Filed: April 3, 2001
    Publication date: March 28, 2002
    Inventors: Michio Sebata, Hideo Takai, Katsuyuki Iwasaki, Hiroshi Higaki, Takaomi Nishigaito, Kenjiro Goda
  • Patent number: 5263894
    Abstract: A ventilation control device for a high-speed train carriage is operable in conjunction with a ventilating blower. A deflectable spring flap is mounted to extend across the ventilation duct in the air flow path. When deflection of the flap reaches a threshold level corresponding to possible passenger discomfort, the flap operates a limit switch positioned behind it. This activates a driving solenoid to close a shutter which shuts off the flow through the duct. A timer holds the shutter closed for a predetermined period, after which it is re-opened. Use of a microprocessor-controlled continuous sensor and damper can thereby be avoided, while cutting out very large pressure fluctuations.
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: November 23, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Haruo Hirakawa, Shinichiroo Ishikawa, Hiroshi Higaki, Atsushi Ikio, Masakazu Matsumoto
  • Patent number: 5137490
    Abstract: Ventilating equipment for railway rolling stock including a low-pressure supply air blower, a high-pressure supply air blower, a low-pressure exhaust air blower, and a high-pressure exhaust air blower. This ventilating equipment ventilates car interior during travel of a train outside of tunnels by the low-pressure supply air blower and the low-pressure exhaust air blower, and also ventilates the car interior during travel in tunnels by the high-pressure supply air blower and the high-pressure exhaust air blower. The high-pressure supply air blower and the high-pressure exhaust air blower produce a higher discharge pressure than a changing external pressure during a high-speed travel in tunnels, thereby preventing the propagation of an influence of the changing external pressure into the car interior.
    Type: Grant
    Filed: March 19, 1991
    Date of Patent: August 11, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Shinichirou Ishikawa, Toshiharu Matsuda, Haruo Hirakawa, Hiroshi Higaki, Atsushi Ikio, Masakazu Matsumoto
  • Patent number: 4802418
    Abstract: A wheelset steering apparatus and method for the truck of railway vehicles, wherein an axle box rotatably provided on the opposite ends of the wheelset is elastically supported in the longitudinal direction as well as in the lateral direction of the truck with respect to a truck frame. Vertical loadings on the truck frame are carried by the axle box. A spring constant in the longitudinal direction of the truck in a state of being elastically supported with respect to the truck frame of the axle box is varied when the vehicle runs. The self-steering property of the wheelset is enhanced, and stability in running on a straight track is secured.
    Type: Grant
    Filed: January 29, 1987
    Date of Patent: February 7, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Isao Okamoto, Katsuyuki Terada, Hiromi Go, Michio Sebata, Hiroshi Higaki, Hideo Takai
  • Patent number: 4746143
    Abstract: A vibration control apparatus for vehicles to be installed on the vehicle wherein a vehicle body is supported on a truck through springs and damping mechanisms, for suppressing the vibrations of the vehicle body and enhancing the riding quality of the vehicle, comprising a vibration detector which detects the vibration of the vehicle body, a compensator circuit which compensates the detection output of the vibration detector and produces a control output for suppressing the vibration of the vehicle body, a fluid operating mechanism which controls the relative displacement between the vehicle body and the truck and which is connected to the vehicle body on one side and to the truck on the other side, a fluid control device which controls the fluid operating mechanism by the use of the control output produced by the compensator circuit, and damping control means to suppress the damping function of the damping mechanism upon sensing the state under which the vibration of the vehicle body is suppressed by the flu
    Type: Grant
    Filed: January 29, 1987
    Date of Patent: May 24, 1988
    Assignees: Japanese National Railways, Hitachi Ltd.
    Inventors: Isao Okamoto, Katsuyuki Terada, Hiromi Go, Michio Sebata, Hiroshi Higaki, Hideo Takai
  • Patent number: 4489659
    Abstract: A girder for supporting a movable body has a truss structure of a cross-sectional shape forming an isosceles triangle with a horizontal base. The truss structure is formed of three main tubes of a circular cross section that are located in positions corresponding to respective corners of the triangle and extend continuously over the length of the girder. A plurality of branch tubes of circular cross section are fixed at their ends to respective pairs of the main tubes by joint pieces, such that three branch tubes lie in a plane extending through the respective joint pieces perpendicular to the longitudinal axes of the main tubes so as to form the isosceles triangle. A rail support is secured to each main tube of the base of the isosceles triangle at a position disposed upwardly and outwardly of the center thereof, and a rail, along which the movable body is traversable, is supported on each rail support.
    Type: Grant
    Filed: October 9, 1981
    Date of Patent: December 25, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Hideaki Kamohara, Minoru Imamura, Hiroshi Higaki, Yuji Yoshitomi, Syuzo Uno, Kazuhiro Makino, Hiroshi Nomura, Kyozo Yoshioka
  • Patent number: 4445569
    Abstract: The present invention relates to a laminated heat exchanger having a laminated construction consisting of a plurality of perforated heat transfer plates and spacers arranged alternatingly, the spacers defining a plurality of fluid passages between respective adjacent heat transfer plates, so that heat is exchanged between different fluids flowing in different fluid passages through the heat transfer across the heat transfer plates. More specifically, the invention is concerned with a heat exchanger of the type described above, wherein a plurality of separate scroll passages are formed by the spacer, so that local concentration of each fluid in its passage is avoided to remarkably improve the heat transfer efficiency.
    Type: Grant
    Filed: March 11, 1982
    Date of Patent: May 1, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Norihide Saho, Koji Koibuchi, Kenjiro Kasai, Hiroshi Higaki
  • Patent number: 4425048
    Abstract: A joint for interconnecting a main pipe and an auxiliary pipe of a framework structure. The joint is adapted to envelope the main pipe and to be fixed thereto and is provided with an expanded portion. The auxiliary pipe is adapted to be fixed to the expanded portion of the joint so that the main pipe and the auxiliary pipe are connected to each other through the joint.
    Type: Grant
    Filed: April 17, 1981
    Date of Patent: January 10, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Hideaki Kamohara, Minoru Imamura, Hiroshi Higaki, Yuji Yoshitomi, Syuzo Uno, Kazuhiro Makino, Hiroshi Nomura