Patents by Inventor Akinori Yokoyama

Akinori Yokoyama 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: 6190578
    Abstract: An anisotropic conductive composition, which comprises one part by weight of copper alloy powders having an oxygen content of 10 to 10,000 ppm and 0.5 to 250 parts by weight of an organic binder, wherein a copper compound exists on the surfaces of particles of the copper alloy powders.
    Type: Grant
    Filed: August 4, 1998
    Date of Patent: February 20, 2001
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Akinori Yokoyama, Toru Mori
  • Patent number: 5413974
    Abstract: A substantially amorphous, aluminum-containing oxide having the composition Al.sub.1-x-y1-y2 Bi.sub.x M.sub.1y1 O.sub.z (wherein x is defined by 0.0001.ltoreq.x.ltoreq.0.10, M.sub.1 is at least one selected from Si, P, B, Sb, Se, Te, Sn, Zn, In, Cr, Nb, Sc, Y, Sr, Ba, Ca, Na, Li, Mg, Mn, W, Ti, Zr, Hf, Be and rare earth metals, M.sub.2 is at least one selected from Fe, Ni, Co, Rh, Ru, Re, Cu and Pb, y1 is defined by 0.ltoreq.y1.ltoreq.0.1, y2 is defined by 0.ltoreq.y2.ltoreq.0.01, z is defined by 1.2.ltoreq.z.ltoreq.1.5, and x, y1, y2 and z are each an atomic ratio); an aluminum-containing metal composition containing the above oxide and Al and/or Bi in a metallic state; a process for producing the above oxide or the above metal composition; and a molded article formed from the above oxide or the above metal composition. The above oxide or the above metal composition is useful as an electronic part, a catalyst, and the like.
    Type: Grant
    Filed: November 22, 1991
    Date of Patent: May 9, 1995
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Akinori Yokoyama, Hitoshi Nakajima
  • Patent number: 5242511
    Abstract: A copper alloy composition comprising 100 parts by weight of powder of copper alloy represented by the general formula Ag.sub.x Cu.sub.y (wherein x and y are atomic ratio values; 0.001.ltoreq..times..ltoreq.0.999, 0.001.ltoreq.y.ltoreq.0.999, x+y=1), 5 to 200 parts by weight of one or more organic binders and 0.01 to 100 parts by weight of an additive capable of removing copper oxide; and a paste for screen printing, electromagnetic shielding, an electrically conductive additive, a paste for electrode and a paste for through hole, which are obtained by using said composition.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: September 7, 1993
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Akinori Yokoyama, Tsutomu Katsumata, Hitoshi Nakajima
  • Patent number: 5198154
    Abstract: A composition, which comprises copper alloy powder represented by a general formula Ag.sub.x Cu.sub.y M.sub.z (where M represents one or more metals selected from Pb, Bi and Zn; x, y and z are atomic ratio values, respectively; and 0.001.ltoreq.x.ltoreq.0.4, 0.6.ltoreq.y.ltoreq.0.999, 0.ltoreq.z.ltoreq.0.05 and x+y+z=1) having particle surface silver concentration higher than the average silver concentration thereof and a region in which a silver concentration increases toward the particle surface, glass frit and an organic vehicle, is useful for pastes for screen printing, electroconductive circuits, electrodes, electromagnetic wave shields and an electroconductive pastes for a resistance contacts.
    Type: Grant
    Filed: November 5, 1991
    Date of Patent: March 30, 1993
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Akinori Yokoyama, Tsutomu Katsumata, Hitoshi Nakajima
  • Patent number: 5091114
    Abstract: Conductive metal powders having high conductivity with minimized silver migration are characterized in that an average composition is represented by Ag.sub.x M.sub.1-x (wherein M is at least one metal selected from Ni, Co, Cu and Fe; 0.01.ltoreq.x.ltoreq.0.4) and has a region wherein a silver concentration progressively increases on moving from the inner part toward the surface. The conductive metal powders, which are useful as leads, electrodes and shielding from electromagnetic interference are prepared by solidifying rapidly a molten metal having the specific composition.
    Type: Grant
    Filed: August 18, 1989
    Date of Patent: February 25, 1992
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hitoshi Nakajima, Akinori Yokoyama
  • Patent number: 4191015
    Abstract: The improved design of a closed toroidal circuit enabling various arrangements of bladed converter members or elements, with many of them standardized for the economical manufacture of various types of converters. The shapes of the outer and inner walls of the toroidal circuit in a radial converter plane are determined by a construction trapezoid and construction rectangle, respectively, that are specified by a system of rectangular coordinates and which have their corners rounded by arcs of specified radii. The outer and inner walls are tangent to an infinite number of circles the diameter of each of which is formulated in relation to the distance of the circle center from the converter axis and the maximum radius of the circuit.
    Type: Grant
    Filed: August 7, 1978
    Date of Patent: March 4, 1980
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Mitsuaki Komatsu, Akinori Yokoyama
  • Patent number: 4128999
    Abstract: In a torque converter equipped with a fluid operated lock-up clutch to provide either a fluid or a rigid mechanical connection between an input and an output shaft, the reactor member is arranged for movement along the converter axis between a working and a retracted position by a fluid operated actuating piston. Upon engagement of the lock-up clutch, the reactor member simultaneously travels from the working to the retracted position, in which latter position the reactor member closes the flow path in the impeller member, in order to minimize power loss incurred by the hydraulic fluid.
    Type: Grant
    Filed: November 23, 1977
    Date of Patent: December 12, 1978
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Akinori Yokoyama, Iwao Morinaka
  • Patent number: 4129000
    Abstract: A hydraulic torque converter having a torus provided with a bladed impeller, a bladed turbine and a bladed stator, the portions of the torus between the impeller, the turbine and the stator each being unbladed wherein the turbine is bulged towards a flywheel of a power supply and the impeller generally stands upright relative to an output axis of the converter thereby decreasing the distance between the drive ring gear and the power take off gear.
    Type: Grant
    Filed: June 9, 1977
    Date of Patent: December 12, 1978
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Haruhiko Umeda, Ryuji Ito, Akinori Yokoyama, Mitsuaki Komatsu
  • Patent number: 4117745
    Abstract: A torque converter and a planetary gear set therefor, said planetary gear set having two sets of clutches wherein one element among a sun gear, a ring gear and a planetary carrier is connected directly to an input shaft, another element is connected directly to an impeller of said torque converter and the other element is connected to an output shaft via one of said clutches. A power absorption capability of the torque converter may be varied in two stages in order to meet separate demands for engine power which occur during various operating phases of vehicle operation.
    Type: Grant
    Filed: October 13, 1976
    Date of Patent: October 3, 1978
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Akinori Yokoyama, Mitsuaki Komatsu