Patents by Inventor Takatoshi Suzuki
Takatoshi Suzuki 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).
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Patent number: 4709198Abstract: A high speed machining controller comprises an acoustic emission sensor which is installed in or near a machine for machining a work piece in a high speed and which detects acoustic emission generated during machining a work piece; a signal processing means which is composed of a band-pass filter for passing an element of a frequency band corresponding to the acoustic emission by inputting a signal outputted from the acoustic emission sensor, a rectification circuit for rectifying a signal outputted from said band-pass filter, a peak detection circuit for detecting peak values of the signal outputted from the rectification circuit, and a smoothing circuit for smoothing output signals of said peak detection circuit and for outputting a signal corresponding to the amplitude of the acoustic emission for the purpose of processing the output signal of the acoustic emission sensor to detect its amplitude; a cutting condition discrimination means for judging the cutting condition of a work piece by comparing a detecType: GrantFiled: May 29, 1986Date of Patent: November 24, 1987Assignees: Kabushiki Kaisha Toyota Chuo Kenkyusho, Toyota Jidosha Kabushiki KaishaInventors: Kazutaka Ogo, Masahiro Hayashi, Takatoshi Suzuki, Katsuiku Hokao, Akio Asai, Takayuki Tsuruhashi
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Patent number: 4691756Abstract: Molding material composed of casting sand coated with a thermosetting resin and hydrous magnesium silicate clay mineral which may be impregnated with an acid and/or coated with a thermosetting resin, and a shell mold produced from the molding material. This material and mold minimize generation of smoke and irritating gases at the time of mold making and casting.Type: GrantFiled: August 14, 1986Date of Patent: September 8, 1987Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Takatoshi Suzuki, Yasuo Takada, Yuji Sakakibara, Masahiro Sugiura, Hiroaki Hayashi, Osami Kamigaito
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Patent number: 4656868Abstract: An apparatus for discriminating a machining state from a non-machining state in a machine tool wherein a workpiece is machined with a cutting tool or grinder, comprising plural vibration sensors including at least one acoustic-emission sensor, which detect vibrations of different frequency bands, respectively, which are produced during machining of the workpiece by the tool. A discriminating device judges that the workpiece is being machined by the tool when levels of output signals generated from at least two of the vibration sensors are higher than respective predetermined threshold levels, and judges that the workpiece is not being machined by the tool when the level of an output signal generated from less than two of the vibration sensors is higher than a predetermined threshold level. Also disclosed is a method for discrimination between the machining and non-machining states.Type: GrantFiled: August 7, 1985Date of Patent: April 14, 1987Assignees: Toyota Jidosha Kabushiki Kaisha, Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Hidekazu Azuma, Ryozi Yoshinaka, Takayuki Tsuruhashi, Katsuiku Hokao, Kazuki Watanabe, Kazutaka Ogo, Takatoshi Suzuki, Masahiro Hayashi
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Patent number: 4597808Abstract: A process for ion nitriding aluminum or an aluminum alloy as an article to be treated, in which: the article is disposed in a sealed vessel; the oxygen gas in the vessel is removed; the surface of the article is heated to a prescribed nitriding temperature; the surface of the article is activated to facilitate the formation of an aluminum nitride layer by the subsequent nitriding treatment; and thereafter the article is subjected to ion nitriding, thereby forming an aluminum nitride layer having excellent wear resistance and high hardness. This ion nitriding treatment for aluminum material can be carried out even at temperatures lower than a solution treatment temperature of aluminum material.Type: GrantFiled: March 29, 1985Date of Patent: July 1, 1986Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Hideo Tachikawa, Takatoshi Suzuki, Hironori Fujita, Tohru Arai
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Patent number: 4522660Abstract: A process for ion nitriding of aluminum or an aluminum alloy and an apparatus therefor, wherein aluminum or an aluminum alloy as an article to be treated is disposed on a substrate holder provided in a sealed container. A predetermined metal having an intensive affinity for oxygen is also disposed in the vicinity of the article to be treated, and a glow discharge is operated between an electrode provided in the sealed container as an anode and the substrate holder as a cathode. The electrode may be directly provided at the sealed container itself or it may be independently provided therein. According to the process and apparatus of the present invention, it is possible to form on the surface of aluminum or an aluminum alloy an aluminum nitride layer having an intensive adhesion to a substrate thereof, high hardness and excellent wear resistance.Type: GrantFiled: June 3, 1983Date of Patent: June 11, 1985Assignee: Kubushiki Kaisha Toyota Chuo KenkyushoInventors: Takatoshi Suzuki, Hideo Tachikawa, Shigeo Moriyama
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Patent number: 4461881Abstract: In a process for producing a homopolymer or a copolymer of propylene comprising polymerizing propylene or copolymerizing propylene and at least one other unsaturated hydrocarbon monomer in liquid propylene using a catalyst system containing activated titanium trichloride (a) and an organoaluminum compound (b), the activated titanium trichloride (a) being prepared by reducing titanium tetrachloride with an organoaluminum compound followed by activation, to produce a polymer slurry; introducing the polymer slurry produced into the top of a counter-current washing tower; and washing the polymer slurry by counter-currently contacting the polymer slurry with liquid propylene introduced into the bottom of the washing tower, the improvement which comprises purifying the homopolymer or copolymer of propylene by feeding an epoxide in a molar amount of about 1 to about 15 times the molar amount of the total of activated titanium trichloride (a) and organoaluminum compound (b), to a part of said washing tower, thereby dType: GrantFiled: October 23, 1981Date of Patent: July 24, 1984Assignee: Sumitomo Chemical Co., Ltd.Inventors: Akinobu Shiga, Kiyoshi Matsuyama, Masahiro Kakugo, Yukio Naito, Takatoshi Suzuki
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Patent number: 4455344Abstract: Granules containing 60 wt. % or more filler, having such particle size distribution that 90 wt. % or more granular particles have a particle size of (1/3)d.sub.50.sup.b to 3d.sub.50.sup.b (d.sub.50.sup.b : mean particle size of the granules), and being produced by blending (a) 60 to 90 parts by weight of a filler having a mean particle size of 0.05 to 100.mu., (b) 5 to 35 parts by weight of crystalline polyolefin powder having a mean particle size (d.sub.50.sup.a) of 150 to 1,000.mu. and having such particle size distribution that 90 wt. % or more particles thereof have a particle size of (1/2)d.sub.50.sup.a to 2d.sub.50.sup.a, (c) 5 to 35 parts by weight of a binder having a melting point lower than that of said crystalline polyolefin powder by a least 10.degree.C., and optionally, (d) a compounding additive, at a temperature lower than the melting point of the crystalline polyolefin powder and higher than the melting point of the binder, is disclosed.Type: GrantFiled: November 9, 1982Date of Patent: June 19, 1984Assignee: Sumitomo Chemical Company, LimitedInventors: Kiyoshi Matsuyama, Kenji Ochi, Hiroyuki Ogawa, Takatoshi Suzuki
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Patent number: 4195145Abstract: A process for purifying propylene homopolymers or copolymers which comprises:(i) polymerizing or copolymerizing propylene with other unsaturated hydrocarbon monomers in liquid propylene in the presence of a catalyst system consisting essentially of (a) an activated titanium trichloride obtained by reducing titanium tetrachloride with an organo-aluminum compound followed by activation and (b) an organo-aluminum compound;(ii) introducing the resulting polymer slurry into an upper portion of a counter-current washing tower to counter-currently contact the polymer slurry with a C.sub.3 -C.sub.8 alcohol and liquid propylene, whereby said catalyst is deactivated and at the same time the propylene homopolymers or copolymers dissolved in the polymer slurry and the catalyst are removed by washing, wherein said alcohol is used in an amount 0.Type: GrantFiled: November 13, 1978Date of Patent: March 25, 1980Assignee: Sumitomo Chemical Company, LimitedInventors: Akinobu Shiga, Kiyoshi Matsuyama, Masahiro Kakugo, Takatoshi Suzuki
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Patent number: 4182852Abstract: In a process for producing a propylene homopolymer or copolymer which comprises polymerizing propylene or copolymerizing propylene and at least one other unsaturated hydrocarbon monomer in liquid propylene using a catalyst comprising activated titanium trichloride and an organo-aluminum compound, the activated titanium trichloride being prepared by reducing titanium tetrachloride with an organo-aluminum compound followed by activation, introducing the polymer slurry produced into the top of a counter-current washing tower, and washing the slurry by bringing the slurry into counter-current contact with liquid propylene which is introduced into the bottom of the washing tower, the improvement which comprises refining the homopolymer or copolymer of propylene by feeding (a) an alcohol having 3 to 8 carbon atoms in a molar amount of about 0.Type: GrantFiled: February 27, 1978Date of Patent: January 8, 1980Assignee: Sumitomo Chemical Company, LimitedInventors: Akinobu Shiga, Kiyoshi Matsuyama, Masahiro Kakugo, Takatoshi Suzuki
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Patent number: 4003976Abstract: A converter for the purification of exhaust gases from internal combustion engines and the like which comprises a first converting layer of a catalyst of a sintered body structure selected from the group consisting of nickel oxide-copper oxide; manganese oxide-cerium oxide; manganese oxide-lanthanum oxide; manganese oxide-iron oxide; manganese oxide-niobium oxide; manganese oxide-nickel oxide; and either niobium oxide or yttrium oxide or mixtures of both with cobalt oxide; and a second converting layer of a catalyst selected from the group consisting of platinum; platinum-rhodium; platinum-palladium; and nickel oxide, chromium oxide, copper oxide, iron oxide and barium oxide; wherein the converter is constructed so that the exhaust gases pass through said first converting layer and then through said second converting layer. A copper-filled layer consisting of a copper-containing material may be further provided upstream of said first and second converting layers.Type: GrantFiled: August 29, 1975Date of Patent: January 18, 1977Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Noboru Komatsu, Osami Kamigaito, Takatoshi Suzuki, Nobuyuki Yamamoto, Haruo Doi, Kazuya Sano, Toshio Kandori, Yukikazu Tsuzuki
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Patent number: 3933483Abstract: An alloy of nickel-aluminum-molybdenum containing silicon in the ranges enclosed between points A (nickel--85% by weight, aluminum--5% by weight, molybdenum--10% by weight), B (nickel--75%, aluminum--15%, molybdenum--10%), C (nickel--65%, aluminum--15%, molybdenum--20%) and D (nickel--75%, aluminum--5%, molybdenum--20%) as shown in FIG. 1 and including silicon in the range of 0.1 to 3% by weight and preferably in a range of 0.5 to 2.5% by weight.Type: GrantFiled: January 15, 1975Date of Patent: January 20, 1976Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Noboru Komatsu, Takatoshi Suzuki, Nobuyuki Yamamoto, Yukikazu Tsuzuki