Patents by Inventor Kazuo Matsuda

Kazuo Matsuda 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: 4613441
    Abstract: A porous membrane formed of a thermoplastic resin having a critical surface tension of not higher than 35 dyn/cm and having a three-dimensional network structure is provided. Communicating pores having a porosity of at least 60% and an average pore diameter of 0.1 to 2.0 microns are formed in the porous membrane. The strength factor F defined by the following formula is at least 1 as measured in any direction: F=A/[B(1-.alpha.)], wherein A is the tensile strength at break of the membrane, B is the tensile strength at break of a non-porous film formed of the same resin and .alpha. is the porosity fraction of the membrane. The thickness of the porous membrane is 5 to 500 microns. The porous membrane is prepared by a process wherein a porous membrane formed of a thermoplastic resin having a critical surface tension of not higher than 35 dyn/cm and having a three-dimensional network structure including communicating pores having an average pore diameter of 0.
    Type: Grant
    Filed: April 20, 1983
    Date of Patent: September 23, 1986
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Mitsuo Kohno, Shigeki Katayama, Kazuo Matsuda
  • Patent number: 4583371
    Abstract: A hydrostatic drive arrangement for a vehicle providing synchronized rotation of a pair of output drive shafts including a pair of transmissions each having a closed loop hydraulic circuit hydraulically interconnecting a variable displacement pump and a hydraulic motor, and a pressure responsive hydraulic synchronizing valve disposed between the hydraulic circuits and normally open to permit interflow of fluid between the hydraulic circuits with the valve being responsive to fluid pressure in one of the hydraulic circuits to restrict flow therethrough when the fluid pressure in the one hydraulic circuit exceeds a predetermined value.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: April 22, 1986
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Kenzo Hoashi, Koichi Morita, Kazuo Matsuda
  • Patent number: 4548036
    Abstract: A hydrostatic transmission for a vehicle having a closed loop hydraulic system hydraulically interconnecting a variable displacement hydraulic pump and a hydraulic motor. The closed loop hydraulic system includes first and second conduits forming the closed loop.The first conduit is connected with a first relief valve having high and low setting pressure and the second conduit is connected with a second relief valve having high and low setting pressure.
    Type: Grant
    Filed: November 19, 1982
    Date of Patent: October 22, 1985
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Kazuo Matsuda, Koichi Morita
  • Patent number: 4545940
    Abstract: A method of dewaxing a vegetable oil which comprises adjusting the temperature of a vegetable oil containing a wax to allow the wax to crystallize and subjecting the temperature-adjusted oil to filtration by means of a porous membrane having a critical surface tension (.gamma.c) of less than 33 dynes/cm and having an average pore diameter of 0.05 to 5 .mu.m, thereby selectively permeating the vegetable oil through the membrane while separating the wax from the vegetable oil. The process of the present invention is useful not only for dewaxing a vegetable oil but also for removing a wax together with a phospholipid, a free fatty acid and water from a crude vegetable oil.
    Type: Grant
    Filed: March 31, 1983
    Date of Patent: October 8, 1985
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Yoshihiko Mutoh, Kazuo Matsuda, Masashi Ohshima, Hiroo Ohuchi
  • Patent number: 4462087
    Abstract: Ion-implanted bubble device comprises a magnetic layer in which bubble propagation paths are formed by ion-implantation. The bubble propagation path has an inside turn including a cusp of which the summit deviates toward a direction of bubble propagation with respect to a cusp center line. Such a bubble propagation path permits the ion-implanted bubble device adopting a folded minor loop organization to be realized.
    Type: Grant
    Filed: February 22, 1983
    Date of Patent: July 24, 1984
    Assignee: Fujitsu Limited
    Inventors: Yoshio Satoh, Makoto Ohashi, Tsutomu Miyashita, Kazuo Matsuda, Kazunari Komenou
  • Patent number: 4445200
    Abstract: A current stretch detection method for a bubble device in which bubbles are written at least one bit apart. A stretch pulse is applied to a stretch conductor so that when a bubble is detected, it is maintained stretched, even though the bubble following it has moved one bit. Preferably the stretch pulse is of a convex-shape. A bubble device has a hairpin stretch conductor and a detecting element disposed centrally in the conductor. The terminal of the detecting element on the higher potential side is arranged so that it does not cross the stretch conductor. The contiguous propagation pattern is provided with a notch at a position in which the stretch conductor is located.
    Type: Grant
    Filed: September 18, 1981
    Date of Patent: April 24, 1984
    Assignee: Fujitsu Limited
    Inventors: Makoto Ohashi, Kazunari Komenou, Tsutomu Miyashita, Kazuo Matsuda, Yoshio Satoh
  • Patent number: 4434476
    Abstract: A magnetic bubble memory device includes: a magnetic layer with a first region having an easy axis of magnetization extending in a certain direction and a second region surrounding the first region and having an easy axis of magnetization substantially perpendicular to that of the first region, said first region defining a plurality of bubble propagation patterns; and a replicate gate with a stretch conductor pattern, to which an electric current is applied so as to stretch a bubble between said propagation patterns, and a cutting pattern formed in the second region between the propagation patterns and adapted to lower the bubble collapse field so as to cut the stretched domain. The replicate gate is operated by applying an operating current pulse to the stretch conductor pattern, said operating pulse including a stretch pulse for stretching the bubble and a cut pulse, following the stretch pulse, for cutting the stretched domain.
    Type: Grant
    Filed: August 17, 1982
    Date of Patent: February 28, 1984
    Assignee: Fujitsu Limited
    Inventors: Kazuo Matsuda, Makoto Ohashi, Yoshio Satoh, Tsutomu Miyashita, Kazunari Komenou
  • Patent number: 4409339
    Abstract: A sulfonated polyolefin porous membrane containing sulfonic groups in an amount, in terms of exchange capacity, of 0.05 to 1 milliequivalent per gram of the sulfonated polyolefin and having a porosity of 30 to 85% and an average pore diameter of 0.05 to 1.mu. has been found to be excellent in water permeability, removal capability, water-permeability retention, mechanical strength and elongation, etc. The porous membrane of the present invention may advantageously be employed as a fine microfilter or the like. The porous membrane of the present invention may be easily prepared by treating with a sulfonating agent a polyolefin porous membrane preferably containing an inorganic filler which is subsequently extracted from the membrane.
    Type: Grant
    Filed: October 6, 1980
    Date of Patent: October 11, 1983
    Assignee: Asahi Kasei Kogyo
    Inventors: Kazuo Matsuda, Mitsuo Kohno, Yoshinao Doi
  • Patent number: 4067546
    Abstract: An operating device for winch control valves, featuring that, in a construction wherein a valve of a clutch for winding up a winch, a valve of a clutch for winding down the winch, and a valve of a brake can be operated by a single control lever to thus simplify the operation of the winch, the boss section of the primary lever linked with a spool of the valve for winding up the winch and the boss section of the secondary lever linked with a spool of the valve of the brake are put to interlocking rotation only at the time of rotation in the unitary direction, the boss section of the said secondary lever and the boss section of the tertiary lever linked with a spool of the valve for winding down the clutch are properly interlocked with each other only at the time of rotation in the unitary direction, a couple of positions as are confronted with each other on the both sides of the center of rotation of a rotator to be put to rotation either forward or backward by the operating lever are properly linked with the s
    Type: Grant
    Filed: October 22, 1975
    Date of Patent: January 10, 1978
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Kazuo Matsuda, Mitsuyoshi Wada, Kazumori Nishida
  • Patent number: 4036801
    Abstract: An aqueous amphoteric polyurethane emulsion is prepared by reacting an isocyanate-terminated urethane prepolymer with an excess of a polyalkylene polyamine to form a polyurethane-urea-polyamine; reacting a portion of the free amino groups contained in the resulting product with a blocked polyisocyanate having one free isocyanate group; rendering the remaining amino groups contained in the resulting product amphoteric either (I) by reacting said amino groups with a compound selected from the group consisting of 1,3-propane sultone, 1,4-butane sultone, .beta.-propiolactone, .gamma.-butyrolactone, .epsilon.-caprolactone, .delta.-valerolactone and a monohalogenated sodium carboxylate having the formulaX(CH.sub.2).sub.
    Type: Grant
    Filed: July 14, 1976
    Date of Patent: July 19, 1977
    Assignee: Kao Soap Co., Ltd.
    Inventors: Kazuo Matsuda, Hidemasa Ohmura, Takeyo Sakai
  • Patent number: 4016121
    Abstract: An aqueous polyurethane emulsion is prepared by reacting a polyhydroxyl component containing 15 to 80% by weight of a polyoxyethylene glycol having a molecular weight of 200 to 10,000 with an excess of an organic polyisocyanate to obtain an isocyanate-terminated urethane prepolymer, reacting that prepolymer with an excess of a polyalkylene polyamine thereby to form a polyurethane-urea-polyamine, reacting the free amino groups in the polyurethane-urea-polyamine with a blocked polyisocyanate having a single free isocyanate group, and mixing the resulting product with water, or reacting said resulting product with a cyclic dicarboxylic acid anhydride followed by mixing with water.
    Type: Grant
    Filed: July 12, 1976
    Date of Patent: April 5, 1977
    Assignee: Kao Soap Co., Ltd.
    Inventors: Kazuo Matsuda, Hidemasa Ohmura, Takeyo Sakai
  • Patent number: 4016123
    Abstract: A process for the preparation of cationic resin aqueous emulsions useful for treating fiber-containing articles, comprising reacting an isocyanate-terminated urethane prepolymer with an excess of a polyalkylene-polyamine to form a polyurethane-urea-polyamine, reacting a part of the amino groups in the thus-formed polyurethane-urea-polyamine with a compound selected from the group consisting of alkyl isocyanates having an alkyl group of 12 to 22 carbon atoms, acyl chlorides having an alkyl group of 12 to 22 carbon atoms and .alpha.-olefin epoxides having 12 to 22 carbon atoms, thereby to introduce a long-chain alkyl group into the molecule of the polyurethane-urea-polyamine, and mixing the alkyl-containing polyurethane-urea-polyamine with an aqueous solution of an acid thereby to convert the remaining amino groups to cations.
    Type: Grant
    Filed: July 11, 1975
    Date of Patent: April 5, 1977
    Assignee: Kao Soap Co., Ltd.
    Inventors: Kazuo Matsuda, Hidemasa Ohmura, Yukihisa Niimi
  • Patent number: 4016122
    Abstract: An aqueous anionic polyurethane emulsion is prepared by reacting an isocyanate-terminated urethane prepolymer with an excess of a polyalkylene polyamine thereby to form a polyurethane-urea-polyamine, reacting a portion of the free amino groups of said polyurethane-urea-polyamine with a blocked polyisocyanate having a single free isocyanate group, reacting the resulting product with a cyclic dicarboxylic acid anhydride, and mixing the resulting product with an aqueous solution of a basic substance.
    Type: Grant
    Filed: July 14, 1976
    Date of Patent: April 5, 1977
    Assignee: Kao Soap Co., Ltd.
    Inventors: Kazuo Matsuda, Hidemasa Ohmura, Takeyo Sakai
  • Patent number: 4016120
    Abstract: Aqueous cationic polyurethane emulsions are prepared by reacting an isocyanate-terminated urethane prepolymer with an excess of a polyalkylene polyamine to form a polyurethane-urea-polyamine, and then partially reacting the free amino groups in said product with a blocked polyisocyanate having a single free isocyanate group, followed by mixing with an aqueous solution of an acid.
    Type: Grant
    Filed: July 12, 1976
    Date of Patent: April 5, 1977
    Assignee: Kao Soap Co., Ltd.
    Inventors: Kazuo Matsuda, Hidemasa Ohmura, Takeyo Sakai
  • Patent number: 4012349
    Abstract: A process for preparing non-ionic polyurethane emulsions comprising chain-extending (A) an isocyanate-terminated urethane prepolymer (formed by reaction of a polyhydroxyl reactant having a molecular weight of 200 to 10,000 and a stoichiometric excess of a polyisocyanate), with (B) a polyalkylene polyamine as chain extending compound, thereby to form a polyurethane-urea polyamine product, mixing the said polyamine product with water or reacting the product with a cyclic dicarboxylic acid anhydride and then mixing the reaction product with water; said process being characterized in that a water-soluble polyoxyethylene glycol comprises 15 to 80% by weight of the polyhydroxyl reactant, and the said polyalkylene polyamine used as the chain-extending compound has at least two primary or secondary amino groups and a functional group having the formula --CH(OH)--CH.sub.2 X in which X is Cl or Br.
    Type: Grant
    Filed: January 12, 1976
    Date of Patent: March 15, 1977
    Assignee: Kao Soap Co., Ltd.
    Inventors: Kazuo Matsuda, Hidemasa Ohmura, Hirakazu Aritaki
  • Patent number: D246450
    Type: Grant
    Filed: February 3, 1977
    Date of Patent: November 22, 1977
    Inventors: Kazuo Matsuda, Hiroshi Kojima
  • Patent number: D246640
    Type: Grant
    Filed: January 28, 1977
    Date of Patent: December 13, 1977
    Assignee: Bridgestone Tire Company Limited
    Inventors: Kazuo Matsuda, Hiroshi Kojima
  • Patent number: D246641
    Type: Grant
    Filed: February 3, 1977
    Date of Patent: December 13, 1977
    Assignee: Bridgestone Tire Company Limited
    Inventors: Kazuo Matsuda, Hiroshi Kojima
  • Patent number: D246642
    Type: Grant
    Filed: February 3, 1977
    Date of Patent: December 13, 1977
    Assignee: Bridgestone Tire Company Limited
    Inventors: Kazuo Matsuda, Hiroshi Kojima
  • Patent number: D287956
    Type: Grant
    Filed: December 3, 1984
    Date of Patent: January 27, 1987
    Assignee: Bridgestone Corporation
    Inventors: Hideaki Nishio, Kazuo Matsuda