Patents by Inventor Hiroyuki Endo

Hiroyuki Endo 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: 4960806
    Abstract: Disclosed herein are stretched poly(arylene thioether) block copolymer films and production processes thereof, said block copolymer film comprising a thermoplastic material composed of (A) 100 parts by weight of a particular poly(arylene thioether) block copolymer, (B) up to 100 parts by weight of at least one other thermoplastic resin, and (C) up to 15 parts by weight of at least one filler.
    Type: Grant
    Filed: October 20, 1989
    Date of Patent: October 2, 1990
    Assignee: Kureha Kagaku Kagyo K.K.
    Inventors: Yoshikatsu Satake, Shinji Yamamoto, Takashi Kaneko, Masahito Tada, Ken Kashiwadate, Toshiya Mizuno, Hiroyuki Endo, Takayuki Katto, Zenya Shiiki
  • Patent number: 4960555
    Abstract: Disclosed herein are poly(arylene thioether) block copolymer fibers formed by melt-spinning a thermoplastic material composed of (A) 100 parts by weight of a particular poly(arylene thioether) block copolymer, (B) up to 50 parts by weight of at least one other thermoplastic resin and (C) up to 10 parts by weight of at least one filler.
    Type: Grant
    Filed: March 28, 1990
    Date of Patent: October 2, 1990
    Assignee: Kureha Kagaku Kogho K.K.
    Inventors: Yoshikatsu Satake, Shinji Yamamoto, Takashi Kaneko, Masahito Tada, Ken Kashiwadate, Toshiya Mizuno, Hiroyuki Endo, Takayuki Katto, Zenya Shiiki
  • Patent number: 4919719
    Abstract: A high temperature wear resistant sintered alloy suitable for the material of a valve seat in an automotive vehicle engine. The matrix of the sintered alloy consists essentially of carbon ranging from 0.45 to 1.15% by weight, nickel ranging from 5.4 to 27% by weight, molybdenum ranging form 0.4 to 2.7% by weight, cobalt ranging from 4.2 to 7.2% by weight and balance being substantially iron. The matrix is formed of a mixture of at least one of sorbite structure and bainite structure and austenite structure. Furthermore, the matrix includes hard phase dispersed therein and containing at least silicon, molybdenum and cobalt. The sintered alloy of such a structure can exhibit high strength and wear resistance at high temperatures regardless of type of engine and kind of fuel in case of being used as the material of the valve seat, while maintaining production cost thereof lower.
    Type: Grant
    Filed: August 29, 1988
    Date of Patent: April 24, 1990
    Assignees: Nissan Motor Co., Ltd., Hitachi Powdered Metals Co., Ltd.
    Inventors: Makoto Abe, Ichiro Tanimoto, Akira Fujiki, Keitaro Suzuki, Hiroyuki Endo, Yutaka Ikenoue
  • Patent number: 4895691
    Abstract: Disclosed herein are poly(arylene thioether-ketone) fibers obtained by melt-spinning a thermoplastic material which comprises 100 parts by weight of a melt-stable poly(arylene thioether-ketone) (PTK) and optionally, up to 50 parts by weight of at least one of thermoplastic resins. The PTK has predominant recurring units of the formula ##STR1## wherein the --CO-- and --S-- are in the para position to each other, and has a melting point, Tm of 310.degree.-380.degree. C., a residual melt crystallization enthalpy, .DELTA.Hmc (420.degree. C./10 min) of at least 10 J/g, a melt crystallization temperature, Tmc (420.degree. C./10 min) of at least 210.degree. C., and a reduced viscosity of 0.3-2 dl/g as determined by viscosity measurement at 25.degree. C. and a polymer concentration of 0.5 g/dl in 98 percent by weight sulfuric acid. The PTK fibers of this invention have high heat resistance and strength.
    Type: Grant
    Filed: May 19, 1989
    Date of Patent: January 23, 1990
    Assignee: Kureha Kagaku Kogyo K.K.
    Inventors: Yoshikatsu Satake, Yo Iizuka, Hiroyuki Endo, Toshitaka Kouyama, Takayuki Katto, Zenya Shiiki
  • Patent number: 4895924
    Abstract: Disclosed herein are poly(arylene thioetherketone) fibers obtained by melt-spinning a thermoplastic material which comprises 100 parts by weight of a melt-stable poly(arylene thioether-ketone) (PTK) and optionally, up to 50 parts by weight of at least one of thermoplastic resins. The PTK has predominant recurring units of the formula ##STR1## wherein the --CO-- and --S-- are in the para position to each other, and has a melting point, Tm of 310-380.degree. C., a residual melt crystallization enthalpy, .DELTA.Hmc (420.degree. C./10 min) of at least 10 J/g, a melt crystallization temperature, Tmc (420.degree. C./10 min) of at least 210.degree. C., and a reduced viscosity of 0.3-2 dl/g as determined by viscosity measurement at 25.degree. C. and a polymer concentration of 0.5 g/dl in 98 percent by weight sulfuric acid. The PTK fibers of this invention have high heat resistance and strength.
    Type: Grant
    Filed: May 12, 1988
    Date of Patent: January 23, 1990
    Assignee: Kureha Kagaku Kogyo K. K.
    Inventors: Yoshikatsu Satake, Yo Iizuka, Hiroyuki Endo, Toshitaka Kouyama, Takayuki Katto, Zenya Shiiki
  • Patent number: 4844024
    Abstract: A heat resistant and wear resistant iron-base sintered alloy to be used as the material of a valve seat and a valve face of an engine valve and a waste gate valve of a turbocharger for an internal combustion engine. The iron-base sintered alloy consists essentially of at least one of molybdenum and tungsten, ranging from 3 to 25% by weight, chromium ranging from 1 to 10% by weight, silicon ranging from 0.1 to 0.9% by weight, manganese ranging not more than 0.7% by weight, phosphorus ranging not more than 0.05% by weight, carbon ranging from 0.1 to 2.5% by weight, boron ranging from 0.5 to 2.0% by weight, intermetallic compound of TiAl ranging from 0.3 to 20% by weight, and balance including iron and impurities. In the sintered alloy, carbide, boride and/or carbide boride and TiAl are uniformly dispersed in the matrix, thereby strengthening grain boundary.
    Type: Grant
    Filed: June 30, 1988
    Date of Patent: July 4, 1989
    Assignees: Nissan Motor Co., Ltd., Hitachi Powdered Metals Co., Ltd.
    Inventors: Akira Fujiki, Yoshiteru Yasuda, Ichiro Tanimoto, Hiroyuki Endo, Yutaka Ikenoue, Keitaro Suzuki
  • Patent number: 4778522
    Abstract: A wear resistant iron-base sintered alloy consists essentially of at least one selected from the group consisting of molybdenum and tungsten, ranging from 5 to 20% by weight, chromium ranging from 2 to 10% by weight, silicon ranging from 0.1 to 0.9% by weight, manganese ranging not more than 0.7% by weight, phosphorus ranging not more than 0.05% by weight, carbon ranging from 0.1 to 0.8% by weight, boron ranging from 0.5 to 2.0% by weight, and balance including iron and an impurity, so that fine multiple carbide, multiple boride, and/or multiple carbide-boride can be homogeneously dispersed as hard grains in the structure of a matrix, thereby exhibiting excellent wear resistance, scuffing resistance and pitting resistance.
    Type: Grant
    Filed: March 9, 1987
    Date of Patent: October 18, 1988
    Assignees: Nissan Motor Co., Ltd., Hitachi Powdered Metals Co., Ltd.
    Inventors: Yoshihiro Maki, Makoto Kano, Akira Fujiki, Ichiro Tanimoto, Hiroyuki Endo, Yukata Ikenoue, Kei Ishii
  • Patent number: 4715257
    Abstract: An improved waveform generator used in an electronic musical equipment for reproducing musical sounds stored therein, in which the waveform of each musical sound is stored in a memory as a sequence of amplitudes sampled at specific sampling points on the waveform and reproduced therefrom by interpolating arithmetically any point between these sampling points.
    Type: Grant
    Filed: July 25, 1986
    Date of Patent: December 29, 1987
    Assignee: Roland Corp.
    Inventors: Atsushi Hoshiai, Hiroyuki Endo
  • Patent number: 4702771
    Abstract: Wear-resistant, sintered iron alloys are provided. The alloys have a structure in which iron-based hard particles having a relatively high Cr content and copper or copper alloy particles are dispersed in an iron alloy matrix containing a relatively low content of Cr. The alloys are prepared by compression molding powders of the matrix alloy, the hard alloy, copper or copper alloy, an Fe-P alloy and graphite and sintering the obtained molding at a temperature of 980.degree. to 1130.degree. C.
    Type: Grant
    Filed: April 4, 1986
    Date of Patent: October 27, 1987
    Assignees: Hitachi Powdered Metals Co., Ltd., Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Yoshiaki Takagi, Yoshihiro Katsui, Hiroyuki Endo, Yutaka Ikenoue
  • Patent number: 4552590
    Abstract: A ferro-sintered alloy having wear resistance at elevated temperatures comprising a matrix in which, on a weight basis, 25-75% of an alloying base A of the following composition is irregularly dispersed with 75-25% of an alloying base B of the following composition, the matrix having dispersed therein 3-15% of at least one of the following hard phases C and D, and optionally being impregnated in its pores with lead:______________________________________ Base A Base B ______________________________________ Cr 2-4% Co 5.5-7.5% Mo 0.2-0.4% Ni 0.5-3% V 0.2-0.4% Mo 0.5-3% C 0.6-1.2% C 0.6%-1.2% Fe the remainder Fe the remainder Hard phase C: 45-60% Co - 33-36% Mo. - and remainder Si Hard phase D: 45-60% Fe - 33-36% Mo - and remainder Si.
    Type: Grant
    Filed: August 12, 1983
    Date of Patent: November 12, 1985
    Assignee: Hitachi Powdered Metals Co. Ltd.
    Inventors: Tohru Nakata, Hiroyuki Endo, Masatoshi Harada, Tadao Hayasaka, Osamu Miyamoto
  • Patent number: 4485770
    Abstract: A material, and a process for producing same, for fabricating components of valve-actuating mechanisms of internal combustion engines, the material comprising an iron-base sintered alloy, which comprises, by weight: 2-7% Cr (chromium); 0.1-1.5% Mo (molybdenum); 0.5-7% W (tungsten); 0.1-3% V (vanadium); and 0.5-3% C (carbon). Upon being subjected to a slide-contact with another member, the material exhibits a high degree of abrasion resistance and at the same time is capable of effectively protecting the material of a member operatively cooperating therewith in slide-contact. The material is thus highly suitable for very frequent slide-contact with a cam member or the like.
    Type: Grant
    Filed: December 22, 1981
    Date of Patent: December 4, 1984
    Assignees: Honda Giken Kogyo Kabushiki Kaisha, Hitachi Powdered Metals Company, Ltd.
    Inventors: Tsutomu Saka, Toshihiro Kamiyama, Hiroyuki Endo, Yutaka Ikenoue
  • Patent number: 4422875
    Abstract: A ferro-sintered alloy having wear-resistance at elevated temperatures, comprises a perlite matrix having a copper content of from 0.2 to 1.5% by weight. 10 to 50% by weight of a phase A rich in heat and corrosion resistance is dispersed in the matrix with phase A including 9 to 20% Cr, 6 to 15% Ni, 1.5 to 9.5% Mo, 1.5 to 9.5% W, 0.7 to 4.5 Cu and an Fe remainder. In addition, 2 to 15% by weight of an additional component is dispersed in the matrix which is selected from one of a group of components which are wear-resistant. The group of components comprises:50.about.70% Mo-Fe Alloy (by weight)50.about.70% Cr-Fe Alloy (by weight)45.about.60% Fe-33.about.36% Mo-Si Alloy (by weight)45.about.60% Co-33.about.36% Mo-Si Alloy (by weight).
    Type: Grant
    Filed: February 25, 1981
    Date of Patent: December 27, 1983
    Assignee: Hitachi Powdered Metals Co., Ltd.
    Inventors: Tohru Nakata, Hiroyuki Endo, Masatoshi Harada, Tadao Hayasaka, Osamu Miyamoto
  • Patent number: 4353960
    Abstract: The invention provides improved composite and conjugate filaments to be used exclusively in in-water submerged purposes. Each of these filaments consists of a core of vinylidene fluoride resin consisting in turn of one or more filamentary element(s), while a sheath consists of polyamide resin. The composing ratio as measured between the cross-sections of these both resins is defined by a value extending from 1/99-to 40/60, preferably from 3/97 to 30/70, still more preferably between 3/97 and 20/80.
    Type: Grant
    Filed: February 27, 1981
    Date of Patent: October 12, 1982
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hiroyuki Endo, Hiroshi Ohhira, Tohru Sasaki
  • Patent number: 4344795
    Abstract: An iron-based sintered sliding product having improved contact fitness and resistance to wear, in which 0.1 to 3 wt. % free graphite and Fe--P--C ternary alloy phase of hardness MHv 300 to 850 having over 3% to 20% of area are dispersed into an iron-based matrix containing either one selected from 0.1 to 1 wt. % Sn and 0.1 to 1 wt. % Zn, and 1 to 10 wt. % Cu and 0.3 to 1 wt. % C. As a modified embodiment of the present invention, an alloy containing Fe--Mo as a main component may be dispersed into the iron-based matrix in place of the aforesaid Fe--P--C ternary alloy phase. Said Fe--P--C ternary alloy phase may be prepared by mixing a single metal element, Fe, C and P into the powdered raw material of the iron-based matrix. Alternatively, said Fe--P--C ternary alloy phase may be prepared by mixing Fe--P--C alloy powder into the powdered raw material of the iron-based matrix.
    Type: Grant
    Filed: February 20, 1980
    Date of Patent: August 17, 1982
    Assignee: Hitachi Powdered Metals Company, Ltd.
    Inventors: Hiroyuki Endo, Yutaka Ikenoue
  • Patent number: 4302556
    Abstract: An improved polyvinylidene fluoride resin-made filament. It consists substantially of a blend of 99-wt. % of a first polyvinylidene fluoride resin component having an inherent viscosity higher than 1.30 dl/g on the one hand, and 1-60 wt. % of a second polyvinylidene fluoride component having an inherent viscosity lower than 1.20 dl/g on the other. The blend has a critical shearing stress lower than 2.8.times.10 dyne/cm.sup.2 and is subjected to melt-spinning and successively to a primary and a secondary stretching in a temperature region of 70.degree.-180.degree. C. The overall stretch factor is selected to be 4-10.
    Type: Grant
    Filed: August 23, 1979
    Date of Patent: November 24, 1981
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hiroyuki Endo, Hirosi Ohhira, Tohru Sasaki