Patents by Inventor Hitoshi Yoshimi
Hitoshi Yoshimi 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: 10290792Abstract: A thermoelectric element is formed with a thread portion on at least one end in an electromotive force generating direction.Type: GrantFiled: October 28, 2014Date of Patent: May 14, 2019Assignee: AISIN TAKAOKA CO., LTD.Inventor: Hitoshi Yoshimi
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Patent number: 9716218Abstract: A manufacturing method of a thermoelectric module comprises forming a first wax model in which the first thermoelectric elements are arranged in a predetermined pattern, forming a first mold from the first wax model, casting a group of the first thermoelectric elements by pouring molten metal of a first thermoelectric material into the first mold to solidify the molten metal, forming a second wax model that represents arrangement of second thermoelectric elements to form the thermoelectric module by being connected with the first thermoelectric elements, forming a second mold from the second wax model, casting the group of the second thermoelectric elements by pouring molten metal of a second thermoelectric material into the second mold to solidify the molten metal, and connecting the group of the first thermoelectric elements with the group of the second thermoelectric elements electrically in series.Type: GrantFiled: November 19, 2013Date of Patent: July 25, 2017Assignee: AISIN TAKAOKA CO., LTD.Inventors: Hitoshi Yoshimi, Kiyohito Kondo, Huai-sheng Dai, Tomiyuki Murayama, Zhong-zhi Zhang, Takeshi Seo
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Patent number: 9573868Abstract: The present invention provides a method for purifying chlorinated hydrocarbon(s), comprising cooling a mixture containing hydrogen fluoride and at least one chlorinated hydrocarbon selected from the group consisting of 2-chloro-3,3,3-trifluoropropene, 2,3-dichloro-3,3-difluoropropene, 1,2,3-trichloro-1,1-difluoropropane, and 1,1,1,2,3-pentachloropropane to cause liquid-liquid separation of the mixture into an upper liquid phase having a high hydrogen fluoride concentration and a lower liquid phase having a high chlorinated hydrocarbon concentration, and a method for purifying a chlorinated hydrocarbon, comprising subjecting the lower liquid phase obtained by the liquid-liquid separation to a distillation operation. According to the present invention, a chlorinated hydrocarbon can be purified by separating and removing hydrogen fluoride from a chlorinated hydrocarbon-hydrogen fluoride mixture under simple and economically advantageous conditions.Type: GrantFiled: September 13, 2012Date of Patent: February 21, 2017Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Takehiro Chaki, Kazuhiro Takahashi, Hitoshi Yoshimi, Yoshinori Tanaka, Yuusuke Iwanaga
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Publication number: 20160254432Abstract: A thermoelectric element is formed with a thread portion on at least one end in an electromotive force generating direction.Type: ApplicationFiled: October 28, 2014Publication date: September 1, 2016Applicant: AISIN TAKAOKA CO., LTD.Inventor: Hitoshi YOSHIMI
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Publication number: 20150303366Abstract: A manufacturing method of a thermoelectric module comprises forming a first wax model in which the first thermoelectric elements are arranged in a predetermined pattern, forming a first mold from the first wax model, casting a group of the first thermoelectric elements by pouring molten metal of a first thermoelectric material into the first mold to solidify the molten metal, forming a second wax model that represents arrangement of second thermoelectric elements to form the thermoelectric module by being connected with the first thermoelectric elements, forming a second mold from the second wax model, casting the group of the second thermoelectric elements by pouring molten metal of a second thermoelectric material into the second mold to solidify the molten metal, and connecting the group of the first thermoelectric elements with the group of the second thermoelectric elements electrically in series.Type: ApplicationFiled: November 19, 2013Publication date: October 22, 2015Applicant: AISIN TAKAOKA CO., LTD.Inventors: Hitoshi YOSHIMI, Kiyohito KONDO, Huai-sheng DAI, Tomiyuki MURAYAMA, Zhong-zhi ZHANG, Takeshi SEO
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Patent number: 8975456Abstract: The present invention provides a method for purifying HFO-1234yf, comprising the steps of (1) cooling a liquid mixture containing HFO-1234yf and HF to separate the mixture into a upper liquid phase having a high concentration of HF and a lower liquid phase having a high concentration of 2,3,3,3-tetrafluoropropene; and (2) subjecting the lower liquid phase obtained in step (1) to a distillation operation to withdraw a mixture containing HFO-1234yf and HF from a top of a distillation column, thereby obtaining substantially HF-free HFO-1234yf from a bottom of the distillation column. According to the present invention, HF and HFO-1234yf contained in a mixture containing HF and HFO-1234yf can be separated under simple and economically advantageous conditions.Type: GrantFiled: November 9, 2010Date of Patent: March 10, 2015Assignee: Daikin Industries, Ltd.Inventors: Takehiro Chaki, Kazuhiro Takahashi, Yoshinori Tanaka, Hitoshi Yoshimi
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Publication number: 20140194656Abstract: The present invention provides a method for purifying chlorinated hydrocarbon(s), comprising cooling a mixture containing hydrogen fluoride and at least one chlorinated hydrocarbon selected from the group consisting of 2-chloro-3,3,3-trifluoropropene, 2,3-dichloro-3,3-difluoropropene, 1,2,3-trichloro-1,1-difluoropropane, and 1,1,1,2,3-pentachloropropane to cause liquid-liquid separation of the mixture into an upper liquid phase having a high hydrogen fluoride concentration and a lower liquid phase having a high chlorinated hydrocarbon concentration, and a method for purifying a chlorinated hydrocarbon, comprising subjecting the lower liquid phase obtained by the liquid-liquid separation to a distillation operation. According to the present invention, a chlorinated hydrocarbon can be purified by separating and removing hydrogen fluoride from a chlorinated hydrocarbon-hydrogen fluoride mixture under simple and economically advantageous conditions.Type: ApplicationFiled: September 13, 2012Publication date: July 10, 2014Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Takehiro Chaki, Kazuhiro Takahashi, Hitoshi Yoshimi, Yoshinori Tanaka, Yuusuke Iwanaga
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Publication number: 20120222448Abstract: The present invention provides a method for purifying HFO-1234yf, comprising the steps of (1) cooling a liquid mixture containing HFO-1234yf and HF to separate the mixture into a upper liquid phase having a high concentration of HF and a lower liquid phase having a high concentration of 2,3,3,3-tetrafluoropropene; and (2) subjecting the lower liquid phase obtained in step (1) to a distillation operation to withdraw a mixture containing HFO-1234yf and HF from a top of a distillation column, thereby obtaining substantially HF-free HFO-1234yf from a bottom of the distillation column. According to the present invention, HF and HFO-1234yf contained in a mixture containing HF and HFO-1234yf can be separated under simple and economically advantageous conditions.Type: ApplicationFiled: November 9, 2010Publication date: September 6, 2012Inventors: Takehiro Chaki, Kazuhiro Takahashi, Yoshinori Tanaka, Hitoshi Yoshimi
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Patent number: 8057779Abstract: There is provided a process for the production of iodine pentafluoride which avoids the problems of the production process of iodine pentafluoride of the prior art as much as possible, and which carries out the reaction of fluorine and iodine moderately, so that iodine pentafluoride is produced more safely and more productively. In the process for the production of iodine pentafluoride by reacting fluorine and iodine, fluorine is supplied to the gas phase 14 which is adjacent to the liquid phase 12 of iodine pentafluoride which contains iodine.Type: GrantFiled: October 18, 2007Date of Patent: November 15, 2011Assignee: Daikin Industries, Ltd.Inventors: Hitoshi Yoshimi, Tatsuya Hirata, Tomohiro Isogai, Takashi Shibanuma
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Publication number: 20100166638Abstract: There is provided a process for the production of iodine pentafluoride which avoids the problems of the production process of iodine pentafluoride of the prior art as much as possible, and which carries out the reaction of fluorine and iodine moderately, so that iodine pentafluoride is produced more safely and more productively. In the process for the production of iodine pentafluoride by reacting fluorine and iodine, fluorine is supplied to the gas phase 14 which is adjacent to the liquid phase 12 of iodine pentafluoride which contains iodine.Type: ApplicationFiled: October 18, 2007Publication date: July 1, 2010Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Hitoshi Yoshimi, Tatsuya Hirata, Tomohiro Isogai, Takashi Shibanuma
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Patent number: 6800161Abstract: A method of arranging cyclic patterns in a tire tread is disclosed, wherein design cycles in each cyclic pattern are repeated in a pitch sequence; with respect to each of the design cycles, an averaged pitch of the pitch lengths of a predetermined number of subsequent design cycles is obtained; combinations of the sequences of the averaged pitches are defined by changing phase between the sequences; with respect to the averaged pitches of the combined sequences, crossover averages are obtained; from the crossover averages in each combination, a difference between a maximum and a minimum is obtained; from the differences of the combinations, a combination having a smaller difference is found; the cyclic patterns are arranged in accordance with the phase shift of the combination having the smaller difference.Type: GrantFiled: March 28, 2002Date of Patent: October 5, 2004Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Shigeaki Takigawa, Hitoshi Yoshimi, Hiroki Yokota
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Patent number: 6610896Abstract: A process for preparing a perfluoroalkadiene compound of formula (I) CF2═CF—(CF2)n-4—CF═CF2 (I) (wherein n is an integer from 4 to 20) by the deiodofluorination of a compound of formula (II) I—(CF2)n—I (II) (wherein n is as defined above), characterised in that said deiodofluorination is conducted in the presence of metallic zinc and a nitrogen-containing organic compound.Type: GrantFiled: July 5, 2002Date of Patent: August 26, 2003Assignee: Daikin Industries, Ltd.Inventors: Jun Miki, Hitoshi Yoshimi, Hirokazu Aoyama
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Publication number: 20030041949Abstract: A method of arranging cyclic patterns in a tire tread is disclosed, wherein design cycles in each cyclic pattern are repeated in a pitch sequence; with respect to each of the design cycles, an averaged pitch of the pitch lengths of a predetermined number of subsequent design cycles is obtained; combinations of the sequences of the averaged pitches are defined by changing phase between the sequences; with respect to the averaged pitches of the combined sequences, crossover averages are obtained; from the crossover averages in each combination, a difference between a maximum and a minimum is obtained; from the differences of the combinations, a combination having a smaller difference is found; the cyclic patterns are arranged in accordance with the phase shift of the combination having the smaller difference.Type: ApplicationFiled: March 28, 2002Publication date: March 6, 2003Inventors: Shigeaki Takigawa, Hitoshi Yoshimi, Hiroki Yokota
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Publication number: 20020193643Abstract: A process for preparing a perfluoroalkadiene compound of formula (I)Type: ApplicationFiled: July 5, 2002Publication date: December 19, 2002Inventors: Jun Miki, Hitoshi Yoshimi, Hirokazu Aoyama
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Patent number: 6468943Abstract: A plant-cultivating artificial material includes: a porous sintered body containing at least one of silica and alumina; and a substance being mainly composed of a bone material component or calcium phosphate. A process for producing the plant-cultivating artificial material includes the steps of: preparing a base material containing at least one of silica and alumina, and a miring substance mainly composed of at least one of bone material and an additive; forming a green body; and heating the green body to obtain a porous sintered body so as to hold a bone material component or calcium phosphate in the porous sintered body. The porous sintered body may include a nitric acid component. The process may include the step of bringing the porous sintered body into contact with a liquid containing a nitric acid component.Type: GrantFiled: August 16, 2000Date of Patent: October 22, 2002Assignee: Aisin Takaoka Co., Ltd.Inventors: Hitoshi Yoshimi, Toshihiro Hattori