Patents by Inventor Akira Gamou
Akira Gamou 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: 8815349Abstract: The invention provides a hot dip galvanized steel sheet which has: a hot dip galvanizing layer having a flat part on a surface thereof; and a film formed on the flat part. The film is composed of a compound containing Zn, Fe, and O, having an average film thickness A in a range from 10 to 100 nm determined by an element analysis of the film, and has {[Fe]/([Zn]+[Fe])} in the film in a range from 0.002 to 0.25, where [Zn] and [Fe] designate the content (% by atom) of Zn and Fe in the film, respectively. Since the hot dip galvanized steel sheet of the invention has excellent press-formability, bondability, and phosphatability, it is suitable for automobiles and electrical appliances.Type: GrantFiled: August 12, 2011Date of Patent: August 26, 2014Assignee: JFE Steel CorporationInventors: Shoichiro Taira, Yoshiharu Sugimoto, Yoichi Miyakawa, Akira Gamou, Masayasu Nagoshi, Takashi Kawano
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Publication number: 20120031531Abstract: The invention provides a hot dip galvanized steel sheet which has: a hot dip galvanizing layer having a flat part on a surface thereof; and a film formed on the flat part. The film is composed of a compound containing Zn, Fe, and O, having an average film thickness A in a range from 10 to 100 nm determined by an element analysis of the film, and has {[Fe]/{[Zn]+[Fe]}} in the film in a range from 0.002 to 0.25, where [Zn] and [Fe] designate the content (% by atom) of Zn and Fe in the film, respectively. Since the hot dip galvanized steel sheet of the invention has excellent press-formability, bondability, and phosphatability, it is suitable for automobiles and electrical appliances.Type: ApplicationFiled: August 12, 2011Publication date: February 9, 2012Applicant: JFE Steel CorporationInventors: Shoichiro Taira, Yoshiharu Sugimoto, Yoichi Miyakawa, Akira Gamou, Masayasu Nagoshi, Takashi Kawano
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Patent number: 8025980Abstract: The invention provides a hot dip galvanized steel sheet which has: a hot dip galvanizing layer having a flat part on a surface thereof; and a film formed on the flat part. The film is composed of a compound containing Zn, Fe, and O, having an average film thickness A in a range from 10 to 100 nm determined by an element analysis of the film, and has {[Fe]/([Zn]+[Fe])} in the film in a range from 0.002 to 0.25, where [Zn] and [Fe] designate the content (% by atom) of Zn and Fe in the film, respectively. Since the hot dip galvanized steel sheet of the invention has excellent press-formability, bondability, and phosphatability, it is suitable for automobiles and electrical appliances.Type: GrantFiled: August 26, 2004Date of Patent: September 27, 2011Assignee: JFE Steel CorporationInventors: Shoichiro Taira, Yoshiharu Sugimoto, Yoichi Miyakawa, Akira Gamou, Masayasu Nagoshi, Takashi Kawano
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Patent number: 7617583Abstract: The invention provides a method for producing a hot-dip plated metal strip comprising the steps of: annealing a metal strip; imparting plastic strain to the metal strip; drawing the metal strip into a molten metal bath for plating; drawing up the metal strip out of the molten metal bath without contacting the molten metal with a roll in the molten metal bath after turning around the metal strip upward with adhering the molten metal on the metal strip; and controlling the coating weight of the molten metal adhered on the metal strip with a wiper. According to the method of the invention, a hot-dip plated metal strip can be produced, in which buckling does not occur, lateral evenness of coating weight is excellent, and dross defects are few.Type: GrantFiled: September 9, 2003Date of Patent: November 17, 2009Assignee: JFE Steel CorporationInventors: Hideyuki Takahashi, Yoshikazu Suzuki, Munehiro Ishioka, Fumio Fujita, Yoichi Miyakawa, Akira Gamou, Kazuhisa Kabeya
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Patent number: 7361385Abstract: The invention relates to a method for manufacturing a hot-dip plated metal strip comprising the steps of: introducing a metal strip into a molten metal bath of plating metal to adhere the molten metal onto the surface of the metal strip; taking out the metal strip, after turning the running direction of the metal strip, from the molten metal bath without applying external force from outside the surface of the metal strip; adjusting the plating weight of the molten metal adhered onto the metal strip; and controlling the shape of the metal strip using magnetic force in non-contact state directly before or after the step of adjusting the coating weight. The invention prevents adhesion of dross to the metal strip without degrading the productivity, and thus manufactures a high quality hot-dip plated metal strip.Type: GrantFiled: November 7, 2002Date of Patent: April 22, 2008Assignee: NKK CorporationInventors: Kazuhisa Kabeya, Kyohei Ishida, Munehiro Ishioka, Hideyuki Takahashi, Toshio Ishii, Yoichi Miyakawa, Akira Gamou, Yoshikazu Suzuki
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Publication number: 20070003706Abstract: The invention provides a hot dip galvanized steel sheet which has: a hot dip galvanizing layer having a flat part on a surface thereof; and a film formed on the flat part. The film is composed of a compound containing Zn, Fe, and O, having an average film thickness A in a range from 10 to 100 nm determined by an element analysis of the film, and has {[Fe]/([Zn]+[Fe]} in the film in a range from 0.002 to 0.25, where [Zn] and [Fe] designate the content (% by atom) of Zn and Fe in the film, respectively. Since the hot dip galvanized steel sheet of the invention has excellent press-formability, bondability, and phosphatability, it is suitable for automobiles and electrical appliances.Type: ApplicationFiled: August 26, 2004Publication date: January 4, 2007Inventors: Shoichiro Taira, Yoshiharu Sugimoto, Yoichi Miyakawa, Akira Gamou, Masayasu Nagoshi, Takashi Kawano
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Publication number: 20050115052Abstract: The invention provides a method for producing a hot-dip plated metal strip comprising the steps of: annealing a metal strip; imparting plastic strain to the metal strip; drawing the metal strip into a molten metal bath for plating; drawing up the metal strip out of the molten metal bath without contacting the molten metal with a roll in the molten metal bath after turning around the metal strip upward with adhering the molten metal on the metal strip; and controlling the coating weight of the molten metal adhered on the metal strip-with a wiper. According to the method of the invention, a hot-dip plated metal strip can be produced, in which buckling does not occur, lateral evenness of coating weight is excellent, and dross defects are few.Type: ApplicationFiled: September 9, 2003Publication date: June 2, 2005Inventors: Hideyuki Takahashi, Yoshikazu Suzuki, Munehiro Ishioka, Fumio Fujita, Yoichi Miyakawa, Akira Gamou, Kazuhisa Kabeya
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Patent number: 6869691Abstract: The invention relates to a high strength hot-dip galvanized steel sheet consisting essentially of 0.03 to 0.25% C, 0.7% or less Si, 1.4 to 3.5% Mn, 0.05% or less P, 0.01% or less S, 0.05 to 1% Cr, 0.005 to 0.1% Nb, by mass, and balance of Fe, and being made of a composite structure of ferrite and secondary phase, and having an average grain size of the composite structure of 10 ?m or smaller. Since the high strength hot-dip galvanized steel sheet of the present invention hardly induces softening at HAZ during welding, it is applicable to structural members of automobiles for “Tailor Welded Blanks” (TWB).Type: GrantFiled: October 17, 2002Date of Patent: March 22, 2005Assignee: NKK CorporationInventors: Yasunobu Nagataki, Fusato Kitano, Kentaro Sato, Masahiro Iwabuchi, Akira Gamou
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Patent number: 6699592Abstract: The invention provides a galvannealed steel sheet which has an oxide layer having 10 nm or larger thickness on the plateau of the coating layer flattened by temper rolling. With the use of the galvannealed steel sheet, no powdering occurs during press-forming, and stable and excellent sliding performance is attained. By selecting the area percentage of the plateau of the flattened coating layer to a range from 20 to 80%, making the coating layer single layer of &dgr;1 phase, and letting &zgr; phase exist in the &dgr;1 phase, further improved sliding performance and anti-powdering property are obtained.Type: GrantFiled: October 21, 2002Date of Patent: March 2, 2004Assignee: NKK CorporationInventors: Shoichiro Taira, Yoshiharu Sugimoto, Junichi Inagaki, Toru Imokawa, Shuji Nomura, Michitaka Sakurai, Masaaki Yamashita, Kaoru Sato, Masayasu Nagoshi, Akira Gamou, Yoichi Miyakawa, Shunsaku Node, Masahiro Iwabuchi
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Publication number: 20030175548Abstract: The invention provides a galvannealed steel sheet which has an oxide layer having 10 nm or larger thickness on the plateau of the coating layer flattened by temper rolling. With the use of the galvannealed steel sheet, no powdering occurs during press-forming, and stable and excellent sliding performance is attained. By selecting the area percentage of the plateau of the flattened coating layer to a range from 20 to 80%, making the coating layer single layer of &dgr;1 phase, and letting &zgr; phase exist in the &dgr;1 phase, further improved sliding performance and anti-powdering property are obtained.Type: ApplicationFiled: October 21, 2002Publication date: September 18, 2003Inventors: Shoichiro Taira, Yoshiharu Sugimoto, Junichi Inagaki, Tomoko Inagaki, Toru Imokawa, Shuji Nomura, Michitaka Sakurai, Masaaki Yamashita, Kaoru Sato, Masayasu Nagoshi, Akira Gamou, Yoichi Miyakawa, Shunsaku Node, Masahiro Iwabuchi
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Publication number: 20030106620Abstract: The invention relates to a high strength hot-dip galvanized steel sheet consisting essentially of 0.03 to 0.25% C, 0.7% or less Si, 1.4 to 3.5% Mn, 0.05% or less P, 0.01% or less S, 0.05 to 1% Cr, 0.005 to 0.1% Nb, by mass, and balance of Fe, and being made of a composite structure of ferrite and secondary phase, and having an average grain size of the composite structure of 10 &mgr;m or smaller. Since the high strength hot-dip galvanized steel sheet of the present invention hardly induces softening at HAZ during welding, it is applicable to structural members of automobiles for “Tailor Welded Blanks” (TWB).Type: ApplicationFiled: October 17, 2002Publication date: June 12, 2003Inventors: Yasunobu Nagataki, Fusato Kitano, Kentaro Sato, Masahiro Iwabuchi, Akira Gamou
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Publication number: 20030077397Abstract: The invention relates to a method for manufacturing a hot-dip plated metal strip comprising the steps of: introducing a metal strip into a molten metal bath of plating metal to adhere the molten metal onto the surface of the metal strip; taking out the metal strip, after turning the running direction of the metal strip, from the molten metal bath without applying external force from outside the surface of the metal strip; adjusting the plating weight of the molten metal adhered onto the metal strip; and controlling the shape of the metal strip using magnetic force in non-contact state directly before or after the step of adjusting the coating weight. The invention prevents adhesion of dross to the metal strip without degrading the productivity, and thus manufactures a high quality hot-dip plated metal strip.Type: ApplicationFiled: November 7, 2002Publication date: April 24, 2003Applicant: NKK CorporationInventors: Kazuhisa Kabeya, Kyohei Ishida, Munehiro Ishioka, Hideyuki Takahashi, Toshio Ishii, Yoichi Miyakawa, Akira Gamou, Yoshikazu Suzuki
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Patent number: 5129124Abstract: A cleaning machine includes a frame having wheels, a suction blower having an air inlet and an air outlet and mounted on the frame, an intake opening communicating with the air inlet of the suction blower for sucking dirt containing relatively large dirt such as fallen leaves and relatively small dirt such as dust together with air by the sucking force generated by the suction blower, a dirt separator communicating with the air outlet of the suction blower by means of a duct for separating the dirt from the air blown out from the suction blower, and a dirt receptable for collecting the relatively large dirt separated by the dirt separator, and the dirt receptacle detachably attached under the main separator.Type: GrantFiled: October 26, 1990Date of Patent: July 14, 1992Assignee: Komatsu Zenoah CompanyInventors: Akira Gamou, Shoji Sakai, Yoshiaki Kanoh, Kenichi Osonoe, Akio Terai, Masayoshi Tsuchiya
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Patent number: 5129125Abstract: A cleaning machine includes a frame having wheels, a suction blower having an inlet and an outlet mounted on the frame, an intake opening communicated with the inlet of the suction blower for sucking dirt containing relatively large dirt such as fallen leaves and relatively small dirt such as dust together with air, a main separator for separating the relatively large dirt, a subseparator for separating the relatively small dirt from the air having passed through the main separator, and a dirt receptacle made of an air-impermable material detachably attached under the main separator through a pivoting rod which is pivotably mounted to the frame so as to support the receptacle to the main separator and a clamp member for securing the dirt receptacle to the main separator.Type: GrantFiled: October 29, 1990Date of Patent: July 14, 1992Assignee: Komatsu Zenoah CompanyInventors: Akira Gamou, Yoshiaki Kanoh, Shoji Sakai, Kenichi Osonoe, Akio Terai, Masayoshi Tsuchiya, Hideo Koizumi