Patents by Inventor Tsutomu Isaka

Tsutomu Isaka 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: 8237302
    Abstract: Main circuit of an electric power generating apparatus for dispersed power supply, having a permanent magnet type electric power generator driven by windmill or waterwheel and having three windings, each inducing a different value of induced voltage, AC outputs of the generator rectified by rectifiers, and DC outputs of the rectifiers summed in parallel for output. First and second reactors are respectively connected in series between first and second rectifiers and output terminals of first and second windings, the first winding inducing the lowest induced voltage among the three windings, the second winding inducing the second lowest. A capacitor is connected between a third rectifier and an output terminal of a third winding inducing the highest induced voltage. The sum of inductive impedance by internal inductance of the third winding and capacitive impedance by the capacitor is capacitive impedance within a range of rotational speed of the generator.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: August 7, 2012
    Assignee: Toyo Electric Mfg. Co., Ltd.
    Inventors: Takashi Shiota, Keita Tanaka, Tsutomu Isaka
  • Publication number: 20120056603
    Abstract: Main circuit of an electric power generating apparatus for dispersed power supply, having a permanent magnet type electric power generator driven by windmill or waterwheel and having three windings, each inducing a different value of induced voltage, AC outputs of the generator rectified by rectifiers, and DC outputs of the rectifiers summed in parallel for output. First and second reactors are respectively connected in series between first and second rectifiers and output terminals of first and second windings, the first winding inducing the lowest induced voltage among the three windings, the second winding inducing the second lowest. A capacitor is connected between a third rectifier and an output terminal of a third winding inducing the highest induced voltage. The sum of inductive impedance by internal inductance of the third winding and capacitive impedance by the capacitor is capacitive impedance within a range of rotational speed of the generator.
    Type: Application
    Filed: November 9, 2011
    Publication date: March 8, 2012
    Applicant: Toyo Electric Mfg. Co., Ltd.
    Inventors: Takashi Shiota, Keita Tanaka, Tsutomu Isaka
  • Patent number: 8058739
    Abstract: In an electric power generating apparatus for dispersed power supply using a permanent magnet type electric power generator having many kinds of windings in order to obtain the maximum output by force of wind without using PWM converter, there is a problem that gap magnetic flux of the permanent magnet type electric power generator is demagnetized to decrease the internal induced voltage because alternating current output of the permanent magnet type electric power generator is lagging current.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: November 15, 2011
    Assignee: Toyo Electric Mfg. Co., Ltd.
    Inventors: Takashi Shiota, Keita Tanaka, Tsutomu Isaka
  • Publication number: 20090243294
    Abstract: In an electric power generating apparatus for dispersed power supply using a permanent magnet type electric power generator having many kinds of windings in order to obtain the maximum output by force of wind without using PWM converter, there is a problem that gap magnetic flux of the permanent magnet type electric power generator is demagnetized to decrease the internal induced voltage because alternating current output of the permanent magnet type electric power generator is lagging current.
    Type: Application
    Filed: September 15, 2006
    Publication date: October 1, 2009
    Applicant: Toyo Electric Mfg. Co., Ltd.
    Inventors: Takashi Shiota, Keita Tanaka, Tsutomu Isaka
  • Patent number: 6011090
    Abstract: A resin composition comprising a resin (a) and a conductive filler (b), wherein the resin (a) contains a styrene type thermoplastic elastomer and/or an olefin type thermoplastic elastomer, said resin composition having a volume resistivity of from 10.sup.2 to 10.sup.12 .OMEGA..multidot.cm and a compression set (Cs1) of at most 35% by JIS K6301.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: January 4, 2000
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Kouichi Sakogawa, Manabu Nishikawa, Tsutomu Isaka, Koukichi Komatsuzaki, Hideki Takahashi
  • Patent number: 5985387
    Abstract: In a thermo-shrinkable polyester film, the thermal shrinkage ratio in a main shrinking direction is about 20% or more after being treated in water of about 70.degree. C. for about seconds, about 35 to about 55% after treated in water of about 75.degree. C. for about 5 seconds, and about 50 to about 60% after being treated in water of about 80.degree. C. for about 5 seconds. After the film is shrunk by about 5% by treatment in water of about 75.degree. C. for about 10 seconds, the probability of the elongation at rupture of the film in the direction perpendicular to the main shrinking direction being about 20% or less, is about 10% or less. The ratio of .tau..sub.1 /.tau..sub.2 is about 0.05 to about 0.45, where .tau..sub.2 is the stress of shrinkage in a main shrinking direction of the film at about 90.degree. C., and .tau..sub.1 is the stress of shrinkage in a direction perpendicular to the main shrinking direction of the film at about 90.degree. C. The sealing strength of the film is about 1.
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: November 16, 1999
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Kuniharu Mori, Mitsuo Inoue, Shinichiro Okumura, Tsutomu Oko, Norimi Tabota, Masatoshi Hashimoto, Hideki Ito, Seizo Takabayashi, Tsutomu Isaka
  • Patent number: 5932685
    Abstract: Heat-shrinkable polyester films having a heat shrinkability of 30% or more, preferably 40% or more, in the direction of major shrinkage after treatment in hot water at 80.degree. C. for 30 seconds, the ratio of heat shrinkability in the direction of major shrinkage after treatment in hot water at 80.degree. C. for 5 seconds to heat shrinkability in the direction of major shrinkage after treatment in hot water at 80.degree. C. for 30 seconds being 0.8 or less, preferably 0.7 or less. The heat-shrinkable polyester films are suitable for label applications because of their particular heat-shrinkable properties such that not only do they scarcely cause longitudinal sinking when shrunk but also they have very few wrinkles, shrinkage spots and strains remaining after shrinkage.
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: August 3, 1999
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Kuniharu Mori, Norimi Tabota, Koji Yamada, Shigeji Konagaya, Tsutomu Oko, Hiroaki Esaki, Seizo Takabayashi, Shinichiro Okumura, Tsutomu Isaka
  • Patent number: 5922424
    Abstract: A laminating film for a metal sheet, which comprises a thermoplastic resin and which is free of a pinhole having a diameter of not less than 0.1 mm .phi. at least in the portion laminated on the metal sheet, a metal sheet prepared by laminating this film, and a metal container formed from this metal sheet. The film of the present invention is superior in corrosion resistance, flavor resistance and printability. Hence, the metal sheet and metal container of the present invention have beautiful appearance and high food protection effect.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: July 13, 1999
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Hideki Igushi, Hiroshi Nagano, Katsuaki Kuze, Tsutomu Isaka
  • Patent number: 5658626
    Abstract: A polyester film having a coefficient of dynamic friction between the film and a metal at 80.degree. C. of not more than 0.45, a polyester film composed of a polyester comprising an ethylene terephthalate unit in a proportion of 70% or more by mole, the polyester film comprising a cyclic ethylene terephthalate trimer in a proportion of 0.7% or less by weight, laminated metal sheets and metal containers manufactured from said laminated metal sheet. According to the present invention, the polyester film shows superior sliding property and superior scratch resistance during can production, as well as the elution of oligomer from the film can be suppressed, so that when the film is used for metal containers for food, the change in and smell of the food contained therein and degraded appearance of the surface of the film caused by the deposition of oligomer are avoided.
    Type: Grant
    Filed: December 8, 1995
    Date of Patent: August 19, 1997
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Katsuaki Kuze, Hiroshi Nagano, Saburoh Ohta, Kuniharu Mori, Tsutomu Isaka
  • Patent number: 5498454
    Abstract: A polyester film having a coefficient of dynamic friction between the film and a metal at 80.degree. C. of not more than 0.45, a polyester film composed of a polyester comprising an ethylene terephthalate unit in a proportion of 70% or more by mole, the polyester film comprising a cyclic ethylene terephthalate trimer in a proportion of 0.7% or less by weight, laminated metal sheets and metal containers manufactured from said laminated metal sheet. According to the present invention, the polyester film shows superior sliding property and superior scratch resistance during can production, as well as the elution of oligomer from the film can be suppressed, so that when the film is used for metal containers for food, the change in taste and smell of the food contained therein and degraded appearance of the surface of the film caused by the deposition of oligomer are avoided.
    Type: Grant
    Filed: August 10, 1994
    Date of Patent: March 12, 1996
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Katsuaki Kuze, Hiroshi Nagano, Saburoh Ohta, Kuniharu Mori, Tsutomu Isaka
  • Patent number: 5424339
    Abstract: An optical material with a high refractive index comprising a resin which is obtainable by polymerization and curing of a composition comprising the following components (A), (B) and (C):component (A): a sulfur-containing (meth)acrylic monomer represented by the following formula [I], or a mixture of the monomer [I] and a sulfur-containing (meth)acrylic monomer represented by the following formula [II]: ##STR1## in each of which formulas, R.sup.1 represents a hydrogen atom or a methyl group, R.sup.2 and R.sup.3 independently represent a hydrocarbyl group of 1 to 12 carbon atoms, X represents a halogen atom except fluorine, and n represents 0 or an integer of 1 to 4, provided that those groups which are in plurality may be the same or different,the weight ratio of the compound [I]/the compound [II] being from 10/0 to 1/9;component (B): a hydroxy(meth)acrylic monomer represented by the following formula [III]: ##STR2## wherein R.sup.5 represents a hydrogen atom or a methyl group, R.sup.
    Type: Grant
    Filed: January 5, 1994
    Date of Patent: June 13, 1995
    Assignee: Mitsubishi Petrochemical Company Limited
    Inventors: Yukihito Zanka, Tsutomu Isaka, Yutaka Tamura
  • Patent number: 5191061
    Abstract: A cured resin for high-fraction lenses is disclosed, which is obtained by polymerizing a composition comprising (A) from 70 to 99 parts by weight of a sulfur-containing aromatic (meth)acrylate represented by formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom or a methyl group; R.sup.2 represents an alkylene group; Ar represents an arylene group, an arylene group substituted with a halogen atom except a fluorine atom, an aralkylene group, or an aralkylene group substituted with a halogen atom except a fluorine atom; X represents --O-- or --S--; Y represents --S-- or --SO.sub.2 -- when X is --O--, or Y represents --S--, --SO.sub.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: March 2, 1993
    Assignee: Misubishi Petrochemical Co., Ltd.
    Inventors: Yukihito Zanka, Seiichiro Hayakawa, Tsutomu Isaka, Fumie Watari
  • Patent number: 4996291
    Abstract: A thermo-shrinkable polyester film of this invention is obtained from a composition that comprises acid components including terephthalic acid and glycol components including ethyleneglycol. The polyester film has a heat-shrinkage ratio of 30% or more in a certain direction at 100.degree. C., and a shrinkage ratio of 5% or more at the point of intersection of a curve showing the internal shrinkage stress of the film and a curve showing the tensile stress of the film.
    Type: Grant
    Filed: September 8, 1989
    Date of Patent: February 26, 1991
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Yasuo Yoshinaka, Katsuaki Kuze, Tsutomu Isaka, Toshihiro Yamashita, Yujiro Matsuyama, Koichiro Nakamura, Tsuyoshi Matsunaga, Osamu Makimura
  • Patent number: 4983675
    Abstract: A silane-crosslinkable copolymer composition comprising: (A) 100 parts by weight of a copolymer prepared by radically polymerizing a polymerizable monomeric mixture consisting essentially of ethylene and at least one ethylenically unsaturated silane compound selected from the group consisting of vinyltrimethoxysilane, vinyltriethoxysilane and .gamma.-methacryloxypropyltrimethoxysilane under a pressure ranging from 1,000 to 4,000 kg/cm.sup.2, and containing said silane compound in an amount of from 0.5 to 2 wt %; (B) from 0.001 to 10 parts by weight of a silanol condensation catalyst; and (C) from 0.01 to 5 parts by weight of a silane compound having a hydrolyzable organic group.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: January 8, 1991
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Iwao Ishino, Akihiko Ohno, Tsutomu Isaka
  • Patent number: 4963418
    Abstract: A thermo-shrinkable polyester type film having the following shrinking properties:a shrinking ratio in one axis is not less than 30% at 80.degree. C. and not less than 50% at 100.degree. C., anda shrinking ratio in a perpendicular axis to the former axis shows the minimum value at a temperature range of 80.degree..+-.25.degree. C., and the process therefor.This film shows an excellent shrinking properties for packaging.
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: October 16, 1990
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Tsutomu Isaka, Toshihiro Yamashita
  • Patent number: 4956209
    Abstract: An anti-fogging multilayered film suitable for packaging fresh vegetables and fruits comprising a base layer and at least one surface layer containing an anti-fogging agent, said film having a water vapor transmission of 15 to 200 g/m.sup.2 .multidot.24 hr.multidot.40.degree. C., an oxygen permeability of 3,000 to 35,000 cc/m.sup.2 .multidot.24 hr.multidot.atm.multidot.20.degree. C..multidot.90% RH, and a carbon dioxide permeability of 12,000 to 130,000 cc/m.sup.2 .multidot.24hr.multidot.atm.multidot.20.degree. C..multidot.90% RH, and said anti-fogging surface layer having heat sealing properties. A packaging bag produced from this film is also disclosed.
    Type: Grant
    Filed: March 21, 1989
    Date of Patent: September 11, 1990
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Tsutomu Isaka, Saburo Ohta
  • Patent number: 4876146
    Abstract: An anti-fogging multilayered film suitable for packaging fresh vegetables and fruits comprising a base layer and at least one surface layer containing an anti-fogging agent, said film having a water vapor transmission of 15 to 200 g/m.sup.2 .multidot.24 hrs.multidot.40.degree. C., an oxygen permeability of 3,000 to 35,000 cc/m.sup.2 .multidot.24 hr.multidot.atm.multidot.20.degree. C..multidot.90% RH, and a carbon dioxide permeability of 12,000 to 130,000 cc/m.sup.2 .multidot.24 hr.multidot.20.degree.C..multidot.90% RH, and said anti-fogging surface layer having heat sealing properties. A packaging bag produced from this film is also disclosed.
    Type: Grant
    Filed: April 29, 1987
    Date of Patent: October 24, 1989
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Tsutomu Isaka, Saburo Ohta
  • Patent number: 4802892
    Abstract: As a fuel oil additive, an ethylenic copolymer is provided which is derived from:(a) ethylene, and(b) at least one monomer selected from the group consisting of vinyl esters of saturated carboxylic acids, ethylenically unsaturated mono- or di-carboxylic acids and esters thereof which are represented by the general formula: ##STR1## wherein R.sup.1 represents hydrogen or a methyl group, R.sup.2 represents the group --OCOR.sup.4 or --COOR.sup.4 in which R.sup.4 represents hydrogen or an alkyl group having 1 to 18 carbon atoms, and R.sup.3 represents hydrogen or the group --COOR.sup.4 in which R.sup.4 has the same significance as above, having a number average molecular weight of less than 1,000 and a (b) component content of 1 to 25 mol %, and containing 2 to 10 alkyl branches per 100 methylene groups. Addition of the copolymer to a fuel oil provides a modified fuel oil having improved plugging resistance and having improved flowability.
    Type: Grant
    Filed: September 18, 1986
    Date of Patent: February 7, 1989
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Takeo Shimada, Tsutomu Isaka, Noriyuki Okada, Iwao Ishino, Nobuhiro Usami
  • Patent number: 4778866
    Abstract: An ethylene copolymer comprising an ethylene unit and an ester unit selected from ethylenically .alpha.,.beta.-unsaturated acid esters represented by the formula (I) or (II): ##STR1## wherein R.sup.1 represents a hydrogen atom or a methyl group; and R.sup.2 represents a halogenated alkyl group having from 1 to 15 carbon atoms; ##STR2## wherein R.sup.3 represents a hydrogen atom or a methyl group; and n represents 0 or 1,wherein said ester unit is present in a total amount of from 0.001 to 10 mol %. The copolymer has excellent dielectric breakdown characteristics, such as electricity treeing property, water treeing property, etc., and is useful as an insulating material for high-voltage cables.
    Type: Grant
    Filed: July 7, 1986
    Date of Patent: October 18, 1988
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Takeo Shimada, Iwao Ishino, Noriyuki Okada, Tsutomu Isaka, Akiyoshi Oonishi, Masaki Saito, Shuhei Doi
  • Patent number: 4717516
    Abstract: A process for enhancing the adhesion of the surface of a shaped product made of a polyester composition which comprises applying corona discharge to the surface under the continuous movement between an electrode for discharge and another electrode opposite thereto while jetting a gaseous material containing oxygen in an amount of not more than 20% by volume onto the part of said surface to which corona discharge is applied so as to achieve the following relationships among oxygen indexes and nitrogen indexes before and after the application of corona discharge:-3.5.ltoreq.(Oi'-Oi)/(Ni'-Ni).ltoreq.1.5 (1)3.ltoreq.Ni' (2)wherein Oi and Oi' are respectively the oxygen indexes before and after the application of corona discharge and Ni and Ni' are respectively the nitrogen indexes before and after the application of corona discharge.
    Type: Grant
    Filed: January 30, 1986
    Date of Patent: January 5, 1988
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Tsutomu Isaka, Hiroshi Nagano