Patents Assigned to Nippon Yakin Kogyo Co., Ltd.
  • Patent number: 5480608
    Abstract: A ferritic stainless steel having excellent oxidation resistance, toughness and hot workability contains 0.001-0.20% of at least one of Ca, Mg and Ba as an amount of [Ca]+[Mg]+1/5[Ba], and La: 0.06-0.5% and Ce: 0.002-0.050% in addition to C, Si, Mn, Ni, Cr, Al, Ti and N as a main component provided that these components satisfy relations of the following equations (1)-(3):[S].ltoreq.[Ca]+[Mg]+1/5[Ba] (1)[La]/[Ce].gtoreq.5 (2)Ti.gtoreq.
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: January 2, 1996
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Masaomi Tsuda, Yoshito Fujiwara, Yuji Ikegami, Masao Sato, Hiroyuki Fujii
  • Patent number: 5395599
    Abstract: A metallic carrier for carrying a catalyst for cleaning exhaust gas and a production method thereof, produced from corrugated plates having a trapezoidal cross section and flat plates, both being resistant to high-temperature oxidation, joined by welding and soldering in the vicinity of the welded portions, which are strongly joined and can be used with no problems of telescoping even under heavy heat cycles and gas pressures.
    Type: Grant
    Filed: March 8, 1993
    Date of Patent: March 7, 1995
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Yoshikazu Koshiba, Yukio Aoki
  • Patent number: 5325911
    Abstract: A continuously cast slab of Fe-Ni series alloy comprising 30-50 wt % of Ni or further 0.001-0.03 wt % of B and the balance of Fe is controlled to an eqiaxial crystal ratio of 20% or 30% in accordance with the existence or nonexistence of B content in the continuous casting and, if necessary, subjected to an electromagnetic stirring treatment or the like for controlling the eqiaxial crystal ratio and then heated at a temperature of not lower than 950.degree. C., 1000.degree. C. and 1100.degree. C. to economically produce Fe-Ni series alloys having improved effect for restraining streaks during etching.
    Type: Grant
    Filed: April 17, 1991
    Date of Patent: July 5, 1994
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Masaomi Tsuda, Toshihiko Taniuchi
  • Patent number: 5316599
    Abstract: Ni-Ti intermetallic compounds are produced by subjecting a laminate of Ni foils and Ti foils to a rolling for thickness adjustment and then to a diffusion heat treatment at multistages within a particular temperature range for a particular time.
    Type: Grant
    Filed: July 9, 1992
    Date of Patent: May 31, 1994
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Kazuo Ebato, Masaomi Tsuda, Tsutomu Oomori
  • Patent number: 5259443
    Abstract: This invention relates to a direct production process of a length of continuous thin two-phase stainless steel strip having excellent superplasticity and surface properties by casting molten two-phase stainless steel directly on either a single roller or a pair of rollers, so that the molten metal is quenched, and a small amount of austenite appears in ferrite matrix.
    Type: Grant
    Filed: February 24, 1992
    Date of Patent: November 9, 1993
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Kuniaki Osada, Takeya Tohge, Masato Noda
  • Patent number: 5134011
    Abstract: A ferritic stainless steel, of which the surface is coated with a blade-like aluminum oxide, is disclosed. The ferritic stainless steel can be manufactured by heating a ferritic stainless steel containing aluminum at the surface in a stream of purified air. The aluminum-containing stainless steel possesses improved adhesiveness to catalyst carrier which can be utilized in a honeycomb metal structure for a catalytic converter for automobile exhaust gases or in a catalytic device for purifying combustion gases.
    Type: Grant
    Filed: April 16, 1990
    Date of Patent: July 28, 1992
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Takeshi Kamiya, Noboru Tachino
  • Patent number: 5085944
    Abstract: A rare-earth metal series alloy for storage of hydrogen is represented by a general formula of Rem.sub.1 Ni.sub.w Al.sub.x Fe.sub.y M.sub.z as an atomic ratio (wherein Rem is at least one rare earth element such as Mischmetal, M is at least one of Cu, Nb, Si and Zr, and 2.5<w<5.5, 0<x<2.0, 0<y<2.0, 0<z<2.0 and 4.0.ltoreq.w+x+y+z.ltoreq.6.0). Further, the alloy is coated with a film of at least one of Pd, Cu and Ni having a thickness of 100-1000 .ANG..
    Type: Grant
    Filed: July 27, 1990
    Date of Patent: February 4, 1992
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Kazuo Ebato, Keiji Tamura
  • Patent number: 5055145
    Abstract: This invention concerns a production process of ferrite stainless steel covered with oxide whisker suitable for metal catalyst supports in automobile's exhaust gas converters, which comprises controlling the continued growth of alumina whiskers on ferrite stainless steel by heating ferrite stainless steel having alumina whiskers on the surface to 1000.degree.-1200.degree. C. for about 1 minute to 1 hour in a non-oxidizing atmosphere.
    Type: Grant
    Filed: August 15, 1989
    Date of Patent: October 8, 1991
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Yuji Ikegami, Shinichi Sasayama, Noboru Tachino, Takeshi Kamiya
  • Patent number: 5017544
    Abstract: This invention concerns a production process of ferrite stainless steel covered with oxide whisker suitable for metal catalyst supports in automobile's exhaust gas converters, which comprises plating a ferrite stainless steel with aluminum, diffusing the aluminum into the stainless steel by heating in vacuum or in a non-oxidizing gas so that the surface of the ferrite stainless steel turns into an aluminum-enriched ferrite phase, and allowing oxide whisker to grow there by heating in the air.
    Type: Grant
    Filed: November 29, 1988
    Date of Patent: May 21, 1991
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Yuji Ikegami, Shinichi Sasayama, Noboru Tachino, Takeshi Kamiya
  • Patent number: 5002923
    Abstract: Disclosed is a catalyst support for catalytic reactors for cleaning exhaust gas, characterized in that flat steel band plates and corrugated steel band plates, each of which is heat-resistance and covered with catalyst, are superposed in such a way that one comes on top of the other alternately, and brazed together on their center line running along the longitudinal direction thereof.
    Type: Grant
    Filed: July 21, 1989
    Date of Patent: March 26, 1991
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Yoshikazu Koshiba, Takeshi Kamiya, Yuji Ikegami, Noboru Tachino
  • Patent number: 5002619
    Abstract: An ingot of Fe-Ni series alloy comprising 30-80 wt % of NI or further 0.001-0.03 wt % and B and the balance of Fe is upset at a forging ratio of at least 1/1.2U, hot forged at a total sectional reduction ratio of at least 30% to form a slab, from which fine crystal grains are formed at final heat treating stage, whereby Fe-Ni series alloys for electronic and electromagnetic materials are economically produced without generating streaks at the etching.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: March 26, 1991
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Masaomi Tsuda, Toshihiko Taniuchi
  • Patent number: 4987000
    Abstract: This invention concerns a mechanical plating process comprising: shaving metal off from a pure metal or alloy block and plating an object to be plated with the shaved off metal by the use of at least a single metal brush, wherein the metal block and the metal brush are in frictional contact with each other, and the object to be plated and the metal brush are concurrently in frictional contact with each other.
    Type: Grant
    Filed: December 12, 1988
    Date of Patent: January 22, 1991
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Yoshikazu Koshiba, Yuji Ikegami, Noboru Tachino, Takeshi Kamiya
  • Patent number: 4856313
    Abstract: Method of controlling a strip crown in a planetary mill line, comprising the steps of rolling a slab by using a shaped feeding roll or rolls before passing between planetary rolls to shape a slab profile in the direction of the width of the slab having a flat or curved central portion, opposite side end thicker than the central portion and side portions thinner than the central portion between the central portion and the opposite side ends and subsequently rolling the slab having such a shaped slab providing a planetary rolled strip having a substantially flat strip crown having a uniform thickness over the width of the strip.
    Type: Grant
    Filed: September 16, 1987
    Date of Patent: August 15, 1989
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Ryozo Mirura, Yoshio Okamoto, Hiroki Takahashi, Souichi Inada
  • Patent number: 4808371
    Abstract: Particularly important properties required for exterior protective members for sheathing heaters are resistance to oxidation, anti-stress corrosion properties and weldability. An austenitic stainless steel for the exterior protective members has been developed from the findings that, firstly, the resistance to oxidation can be remarkably improved by increasing the Cr content together with a combined addition of Al and rare earth metals. Secondly, a small amount of Co addition is effective to enhance alloy ability to withstand stress corrosion cracking in the environment to which sheathing heaters are subjected, and that the weldability of such members can be made superior by maintaining the content of Si and Ti within a specified region.
    Type: Grant
    Filed: August 10, 1987
    Date of Patent: February 28, 1989
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Toshihiko Taniuchi, Rikio Nemoto, Yoshito Fujiwara
  • Patent number: 4790368
    Abstract: A wide thin metal sheet having a smooth surface may be manufactured directly from molten metal. A lower end of a nozzle installed vertically at the bottom of a molten metal vessel is held in contact with an inclined plate made of a refractory material, molten metal is discharged in a fan-shape from a notch formed in the peripheral wall of the nozzle end, the discharged molten metal being rendered into a constant shape laminar flow having a uniform flow rate distribution on the inclined surface as it flows down the inclined plate. The constant shape laminar flow is supplied to a molten metal pool between a pair of rollers of internally water-cooled type without any disturbance on the surface and in the inside. The metal solidified in the neighborhood of a portion of the gap between the two rollers is discharged from an open-at-the-bottom space defined between the two rollers.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: December 13, 1988
    Assignees: Nippon Yakin Kogyo Co. Ltd., Talako Kusakawa
    Inventors: Takaji Kusakawa, Kazuo Ebato, Takeya Tohge, Masato Noda, Yasuhide Kuroda
  • Patent number: 4705656
    Abstract: A method for producing spherical metal particle uses a molten metal reservoir for containing a molten metal, a rotary drum having a number of teeth onto which the molten metal is to be adhered one after another and a driving means for rotating the rotary drum so that the molten metal adhered to each of the teeth can be scattered from the teeth before even a part of each molten metal adhered to the teeth solidifies. At least one tooth of the rotary drum is dipped into the molten metal contained in the molten metal reservoir. The molten metal adhered to the teeth is scattered from the teeth before any portion of it has solidified by means of centrifugal force acting on the rotary drum. The molten metal assumes a spherical or similar shape during its trajectory due to surface tension. It cools by atmospheric cooling to solidify as discrete metal particles of substantially uniform diameter.
    Type: Grant
    Filed: July 3, 1986
    Date of Patent: November 10, 1987
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Takashi Onoyama, Hiroshi Makino
  • Patent number: 4647511
    Abstract: Produced flake like metal chip has a shape being convexed in one side and concaved in the other side in its cross section.These metal chips are produced by dipping spherical or cone shaped projections provided on an outer surface of a rotary drum into molten metal contained in a molten metal reservoir, the molten metal adheres to each projections being dipped then the adhered molten metal is stripped off of each projection after at least a part of the molten metal has solidified.The apparatus for working the above-mentioned method includes, a molten metal reservoir, a rotary drum carrying on its outer surface a number of aforesaid projections, to the tip end of which the molten metal is adhered, and a means for stripping off the adhered molten metal after at least a part of the adhered molten metal has solidified.
    Type: Grant
    Filed: March 27, 1985
    Date of Patent: March 3, 1987
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Takashi Onoyama, Hiroshi Makino
  • Patent number: 4552199
    Abstract: A plurality of discrete small cooling surfaces are arrayed on the surface of a movably received heat extracting member in both the axial and rotational directions. The discrete small cooling surfaces are formed by a plurality of one set of parallel grooves formed obliquely to and between the two axial ends of the heat extracting member and are crossed by a plurality of another set of parallel grooves formed in a similar manner but in different direction. An opening of a nozzle is directed toward the outer peripheral surface of the heat extracting member. A continuing stream of molten material is projected upon the discrete small cooling surfaces of the rotating heat extracting member such that the heat of the molten material is extracted by each of the discrete small cooling surface to solidify the molten material into flake particles. Accordingly, the molten material can be applied concurrently onto a plurality of discrete small cooling surfaces.
    Type: Grant
    Filed: April 4, 1983
    Date of Patent: November 12, 1985
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Takashi Onoyama, Osamu Ando, Tsuyoshi Minakata