Patents by Inventor Hiroshi Takai

Hiroshi Takai 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: 5777473
    Abstract: In specific magnetic resonance imaging, magnetization spins are repeatedly excited by excitation pulses, and echoes are repeatedly generated after each of the excitation pulses. The echoes so generated are acquired as echo signals. Based on these echo signals, image data is reconstructed. According to the present invention, the number of times the magnetization spins are excited by the excitation pulses is input by an operator and, based on this input number, the number of echoes generated by one excitation is determined. Image-pickup time can easily be computed on the basis of the number of times of excitation and the time required for repeating fixed excitation pulses. The operator is able to easily control the image-pickup time by controlling the input number of times of excitation.
    Type: Grant
    Filed: April 25, 1996
    Date of Patent: July 7, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Takai, Yoshimori Kassai
  • Patent number: 5672970
    Abstract: A magnetic-resonance imaging apparatus of the present invention performs a field echo sequence and high-speed spin echo sequence with an excitation pulse shared by them and, by so doing, it is possible to, in comparison with the high-speed spin echo sequence only, reduce a repetition time and hence an imaging time.
    Type: Grant
    Filed: December 23, 1996
    Date of Patent: September 30, 1997
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hiroshi Takai
  • Patent number: 5639322
    Abstract: The present invention relates to a joining method, a joining apparatus and a joining agent capable of joining two bodies to be jointed in a large size or in a complicated shape in a good joining condition. Specially, the present invention is to provide an improvement in a control of the current supplying method applicable for the electrically heating of the ceramic bodies or a joining agent in an electric conduction (a elecrode switching type due to a plurality of fixed electrodes and a switching control type between two kinds of the electric power sources), a control method of a auxiliary heating, a control of the holding apparatus (the control by the free thermal expansion at the pre-heating, a adaption of a balance mechanism and a measurement of the displacement), the adjustment of the shape at the butted portion (improvement of the pipe joint structure) and a joining agent superior in the joining strength.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: June 17, 1997
    Assignee: Daihen Corporation
    Inventors: Kouji Okuda, Tokumitsu Nishi, Hisakiyo Hoshino, Hiroshi Takai, Natsumi Miyake
  • Patent number: 5534091
    Abstract: The present invention related to a method for joining ceramic members and an insertion member to be employed in the joining method. In the present invention, ceramic members are heated by the induction heating in a state that a heating ceramic member having a conductivity larger than those of the ceramic members to be jointed is intervened between the ceramic members to be jointed. In this induction heating, the heating ceramic member having a larger conductivity is mainly heated and the temperature of the butting portion is raised up to a temperature needed to join the ceramic members. Upon joining the ceramic members, it is desirable to press the butting portion but is not necessarily needed. In the case without the pressing, it is desirable to form a layer of a joining agent on each of the butting surfaces of the heating insertion member beforehand.
    Type: Grant
    Filed: July 28, 1994
    Date of Patent: July 9, 1996
    Assignee: Daihen Corporation
    Inventors: Kouji Okuda, Tokumitsu Nishi, Hiroshi Takai, Hisakiyo Hoshino
  • Patent number: 5420509
    Abstract: In a magnetic resonance imaging apparatus of a multi-slice scheme, data of a low frequency component in a phase-encoding direction are acquired from a predetermined number of slices within a predetermined repetition time corresponding to a desired contrast, data of a high frequency component in the phase-encoding direction are acquired from slices, which are different depending on a sign of a frequency thereof and which number is half the predetermined number of slices, within a repetition time shorter than the predetermined repetition time. Complex conjugate data of the acquired data or 0 data are utilized as data which are not acquired, thereby reconstructing images of the predetermined number of slices. Since data of slices that cannot be acquired due to shortening of the repetition time can be restored by utilizing the complex conjugate data or 0 data of the acquired data, the scanning time can be shortened without decreasing the number of slices to be acquired.
    Type: Grant
    Filed: February 24, 1993
    Date of Patent: May 30, 1995
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hiroshi Takai
  • Patent number: 5368673
    Abstract: The present invention relates to a joining method, a joining apparatus and a joining agent capable of joining two bodies to be jointed in a large size or in a complicated shape in a good joining condition. Specially, the present invention is to provide an improvement in a control of the current supplying method applicable for the electrically heating of the ceramic bodies or a joining agent in an electric conduction (a elecrode switching type due to a plurality of fixed electrodes and a switching control type between two kinds of the electric power sources), a control method of a auxiliary heating, a control of the holding apparatus (the control by the free thermal expansion at the pre-heating, a adaption of a balance mechanism and a measurement of the displacement), the adjustment of the shape at the butted portion (improvement of the pipe joint structure) and a joining agent superior in the joining strength.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: November 29, 1994
    Assignee: Daihen Corporation
    Inventors: Kouji Okuda, Tokumitsu Nishi, Hisakiyo Hoshino, Hiroshi Takai, Natsumi Miyake
  • Patent number: 5352385
    Abstract: Described in a joining agent for joining electrically ceramic bodies by heating the joining agent inserted at the parts to be jointed between the ceramic bodies with an electric current flowing predominantly through the joining agent at high temperature. The joining agent is superior in the wetability and reactivity with the ceramics to ensure the joint part strength. The joining agent includes, as an electric conductor, an electric conductive component made of an ion conductor consisting of fluoride, chloride, and/or oxide, which forms carrier ions by the pre-heating and has an electric conductivity higher than that of the ceramic body at the electric current supplying time. During the supplying electric current to time, the joining agent has the electric resistance increased gradually at the molten state of the joining agent by decreasing the density or the mobility of the carrier ions.
    Type: Grant
    Filed: March 25, 1992
    Date of Patent: October 4, 1994
    Assignee: Daihen Corporation
    Inventors: Hiroaki Yanagida, Akio Matsui, Tokumitsu Nishi, Kouji Okuda, Hiroshi Takai, Hisakiyo Hoshino, Masahi Numano, Natsumi Miyake
  • Patent number: 5294769
    Abstract: The present invention provides an electric joining method of a body to be jointed including the butted portion of at least between electroconductive ceramics to be jointed or between an electroconductive ceramics and a metal to be jointed, whereby the body to be jointed is electrically jointed while the thermal stress generated at the ceramics materials to be jointed is eased. In the electric joining method according to the present invention, at least a pair of electrodes are brought to butt against the materials to be jointed holding at least one or more butted portions therebetween, with a joining agent interposed at the butted portions. Moreover, there provided are a first heating means for heating the materials to be jointed between the electrodes by Joule heat through impression of a voltage between the electrodes and, a second heating means for heating a part of said materials to be jointed and its vicinity where a large temperature gradient is formed only by the first heating means.
    Type: Grant
    Filed: June 3, 1992
    Date of Patent: March 15, 1994
    Assignee: Daihen Corporation
    Inventors: Tokumitsu Nishi, Kouji Okuda, Hiroshi Takai, Hisakiyo Hoshino, Masashi Numano, Natsumi Miyake
  • Patent number: 5113635
    Abstract: An apparatus for automatically feeding and packing surimi of fish or shellfish, including a feed hopper having a top inlet for feeding the surimi therefrom and a bottom outlet for discharging the surimi therefrom. A screw feeder connected to the bottom outlet of the fed hopper has two screws for passing the surimi through the screw feeder. A feed pump feeds a predetermined quantity of the surimi flowing out from an exit of the screw feeder in which the predetermined quantity of the surimi is formed into a desired shape by a forming tube. A wrapping tube forming device forms a plastic film into a continuous wrapping tube to be packed with the surimi.
    Type: Grant
    Filed: December 24, 1990
    Date of Patent: May 19, 1992
    Assignees: Nippon Suisan Kaisha Ltd., Ishida Iron Works, Co., Ltd.
    Inventors: Hiroshi Takai, Sachio Ishida
  • Patent number: 4563569
    Abstract: A gas shielded arc welding torch is described which uses a consumable electrode wire. A cylindrical support member carries a guide tube for guiding the electrode wire through the torch. An electrical contact member is pivotably mounted at the end of the torch and includes a bore through which the wire passes. A spring biases the contact member into constant engagement with the electrode wire. A gas nozzle is mounted on the cylindrical support member and is movable with the contact member to provide a uniform, constant-dimensioned shielding gas passage around the contact member regardless of the movement thereof.
    Type: Grant
    Filed: May 27, 1983
    Date of Patent: January 7, 1986
    Assignees: Osaka Transformer Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Kousuke Shiramizu, Yoshirou Awano, Hiroji Okada, Hiromu Yamagami, Hiroshi Takai