Patents by Inventor Norimasa Yamada
Norimasa Yamada 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: 8216667Abstract: This invention provides a tantalum carbide-coated carbon material, which has excellent corrosion resistance to reducing gases and thermal shock resistance at high temperatures, and a process for producing the same. The tantalum carbide-coated carbon material comprises a carbon substrate and a coating film provided on the carbon substrate directly or through an intermediate layer. The coating film is formed of a large number of densely aggregated fine crystals of tantalum carbide. The diffraction line of the (220) plane of tantalum carbide shows the maximum diffraction intensity in an X-ray diffraction pattern of the coating film. More preferably, this diffraction intensity is not less than four times the intensity of a diffraction line showing the second highest diffraction intensity.Type: GrantFiled: February 7, 2006Date of Patent: July 10, 2012Assignee: Toyo Tanso Co., Ltd.Inventors: Hirokazu Fujiwara, Norimasa Yamada, Yoshihisa Abe
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Publication number: 20120040172Abstract: The problem of the present invention is provision of a tantalum carbide-coated carbon material having superior corrosion resistance to reducing gas and superior resistance to thermal shock at a high temperature and a production method thereof. According to the present invention, a tantalum carbide-coated carbon material having a carbon substrate and a coating film formed directly or via an intermediate layer on the aforementioned carbon substrate can be provided. The coating film consists of a number of microcrystals of tantalum carbide, which are densely gathered and, in an X-ray diffraction pattern of the coating film, the diffraction intensity of the (220) plane of tantalum carbide preferably shows the maximum level, more preferably, the aforementioned diffraction intensity is not less than 4 times the intensity of the second highest diffraction intensity.Type: ApplicationFiled: February 7, 2006Publication date: February 16, 2012Inventors: Hirokazu Fujiwara, Norimasa Yamada, Yoshihisa Abe
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Patent number: 7126342Abstract: A voltage measurement device includes a first group of switches Q1, Q2, a second group of switches Q7, Q8 and a third groups of switches Q5, Q6. By turning on the third group of switches Q5, Q6, the first group of switches Q1, Q2 are turned on, so that a condenser C1 is charged by voltage impressed between a voltage input terminal A and a voltage input terminal B. While the first group of switches Q1, Q2 are turned off by tuning off the third group of switches Q5, Q6, the second group of switches Q7, Q8 are turned on, so that voltage retained in the condenser C1 is generated between a voltage output terminal G and a voltage output terminal H.Type: GrantFiled: March 23, 2004Date of Patent: October 24, 2006Assignees: Sanken Electric Co., Ltd., Honda Motor Co., Ltd.Inventors: Akio Iwabuchi, Masaki Kanazawa, Kazuya Aizawa, Norimasa Yamada, Toshiaki Ariyoshi, Takafumi Tsurumi, Yoshikazu Nomoto
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Publication number: 20060186894Abstract: A voltage measurement device includes a first group of switches Q1, Q2, a second group of switches Q7, Q8 and a third groups of switches Q5, Q6. By turning on the third group of switches Q5, Q6, the first group of switches Q1, Q2 are turned on, so that a condenser C1 is charged by voltage impressed between a voltage input terminal A and a voltage input terminal B. While the first group of switches Q1, Q2 are turned off by tuning off the third group of switches Q5, Q6, the second group of switches Q7, Q8 are turned on, so that voltage retained in the condenser C1 is generated between a voltage output terminal G and a voltage output terminal H.Type: ApplicationFiled: March 23, 2004Publication date: August 24, 2006Inventors: Akio Iwabuchi, Masaki Kanazawa, Kazuya Aizawa, Norimasa Yamada, Toshiaki Ariyoshi, Takafumi Tsurumi, Yoshikazu Nomoto
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Patent number: 6940706Abstract: It is acknowledged that an electric double layer capacitor is markedly superior in power density and cycle characteristics to a secondary battery. However, a higher energy density is required to apply it to a power supply of hybrid vehicle, electric vehicle or the like. The present inventors have found that a carbonaceous material containing copper or a compound of copper exhibits excellent characteristics as an electrode material for capacitor and can realize a capacitor having a large capacity. In the electrode material and the capacitor, copper or a compound of copper exists in the amount of 0.8 to 30 parts by weight calculated on the metal basis based on 100 parts by weight of the carbonaceous material, particularly preferably.Type: GrantFiled: December 1, 2000Date of Patent: September 6, 2005Assignee: Kanebo Ltd.Inventors: Yusaku Sakata, Akinori Muto, Norimasa Yamada, Azhar Uddin, Masaru Takei, Kenji Kojima, Satoshi Ibaraki, Chisato Marumo
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Publication number: 20040004208Abstract: It is acknowledged that an electric double layer capacitor is markedly superior in power density and cycle characteristics to a secondary battery. However, a higher energy density is required to apply it to a power supply of hybrid vehicle, electric vehicle or the like. The present inventors have found that a carbonaceous material containing copper or a compound of copper exhibits excellent characteristics as an electrode material for capacitor and can realize a capacitor having a large capacity. In the electrode material and the capacitor, copper or a compound of copper exists in the amount of 0.8 to 30 parts by weight calculated on the metal basis based on 100 parts by weight of the carbonaceous material, particularly preferably.Type: ApplicationFiled: February 24, 2003Publication date: January 8, 2004Inventors: Yusaku Sakata, Akinori Muto, Norimasa Yamada, Azhar Uddin, Masaru Takei, Kenji Kojima, Satoshi Ibaraki, Chisato Marumo
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Patent number: 4633500Abstract: A speech synthesizer includes a lattice-type multi-stage digital filter modified in the next to last stage thereof by incorporating an increasing circuit for slightly effectively increasing the absolute value of a parameter K.sub.2 so as to reduce an attenuation factor. The device is useful for generating tones of a sustained quality, such as musical tones.Type: GrantFiled: March 17, 1983Date of Patent: December 30, 1986Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Norimasa Yamada, Masahiro Hibino
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Patent number: 4308830Abstract: In an internal combustion engine which is provided with a throttle valve of the type which, when slightly opened, provides a flow of intake gases which is biased towards one particular side of the intake passage, a vane is provided, which particularly directs gases passing near that one particular side of the intake passage towards a portion of the edge of the inlet port which is most remote from the central axis of the power cylinder, whereby good swirl and turbulence are generated in the power cylinder, especially during low and medium load operation of the engine.Type: GrantFiled: June 5, 1979Date of Patent: January 5, 1982Assignee: Toyota Jidosha Kogyo Kabushiki KaishaInventors: Norimasa Yamada, Yoshihiro Iwashita, Masanori Okada, Yoshihiro Kanome
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Patent number: 4308829Abstract: In an internal combustion engine which is provided with a throttle valve of the type which, when slightly opened, provides a flow of intake gases which is biased towards one particular side of the intake passage, and which is provided with a helical type inlet port which has a helical surface leading to the combustion chamber which imparts swirl to inlet gases, a vane is provided, which particularly directs gases passing near that one particular side of the intake passage towards the start of the helical surface, whereby good swirl and turbulence are generated in the power cylinder, especially during low and medium load operation of the engine.Type: GrantFiled: June 4, 1979Date of Patent: January 5, 1982Assignee: Toyota Jidosha Kogyo Kabushiki KaishaInventors: Norimasa Yamada, Yoshihiro Iwashita, Masanori Okada, Yoshihiro Kanome