Patents by Inventor Takeshi Takahori
Takeshi Takahori 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: 8613821Abstract: Provided is a basic metal nitrate suitable as an oxidizing agent for a gas generating agent, which is a basic metal nitrate having a good thermal stability and meeting at least one requirement of the following (a) to (d): (a) a particle diameter of 0.5 to 40 ?m; (b) a degree of crystallinity having 0.4 deg or less of a half band width of the peak in the X-ray analysis; (c) an initiation temperature of weight loss being 220° C. or higher according to TG-DTA analysis; and (d) an impurity content of 1,000 ppm or less based on Na atom. Further provided is a gas generating composition which has a low toxicity, a high burning rate and a low combustion temperature and which is used in a gas generator for an air bag. The gas generating composition comprises (a) tetrazole derivatives, guanidine derivatives or a mixture thereof, (b) a basic metal nitrate and (c) a binder and/or a slag-forming agent.Type: GrantFiled: September 8, 2010Date of Patent: December 24, 2013Assignee: Daicel Chemical Industries, Ltd.Inventors: Xingxi Zhou, Kazuyuki Matsuoka, Jianzhou Wu, Yo Yamato, Takeshi Takahori, Kaoru Yamazaki
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Publication number: 20100326574Abstract: Provided is a basic metal nitrate suitable as an oxidizing agent for a gas generating agent, which is a basic metal nitrate having a good thermal stability and meeting at least one requirement of the following (a) to (d): (a) a particle diameter of 0.5 to 40 ?m; (b) a degree of crystallinity having 0.4 deg or less of a half band width of the peak in the X-ray analysis; (c) an initiation temperature of weight loss being 220° C. or higher according to TG-DTA analysis; and (d) an impurity content of 1,000 ppm or less based on Na atom. Further provided is a gas generating composition which has a low toxicity, a high burning rate and a low combustion temperature and which is used in a gas generator for an air bag. The gas generating composition comprises (a) tetrazole derivatives, guanidine derivatives or a mixture thereof, (b) a basic metal nitrate and (c) a binder and/or a slag-forming agent.Type: ApplicationFiled: September 8, 2010Publication date: December 30, 2010Inventors: Xingxi Zhou, Kazuyuki Matsuoka, Jianzhou Wu, Yo Yamato, Takeshi Takahori, Kaoru Yamazaki
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Patent number: 7662248Abstract: The present invention provides a process for producing a gas generating agent capable of constantly producing a gas generating agent with a high quality. The process for producing a gas generating agent comprises the first step of feeding nitroguanidine, a basic copper nitrate and guar gum and stirring and mixing them in the presence of moisture, the second step of extrusion-molding and cutting the mixture, and the third step of drying it.Type: GrantFiled: March 27, 2001Date of Patent: February 16, 2010Assignee: Daicel Chemical Industries, Ltd.Inventors: Akio Yamamoto, Takeshi Takahori
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Publication number: 20090101250Abstract: Provided is a basic metal nitrate suitable as an oxidizing agent for a gas generating agent, which is a basic metal nitrate having a good thermal stability and meeting at least one requirement of the following (a) to (d): (a) a particle diameter of 0.5 to 40 ?m; (b) a degree of crystallinity having 0.4 deg or less of a half band width of the peak in the X-ray analysis; (c) an initiation temperature of weight loss being 220° C. or higher according to TG-DTA analysis; and (d) an impurity content of 1,000 ppm or less based on Na atom. Further provided is a gas generating composition which has a low toxicity, a high burning rate and a low combustion temperature and which is used in a gas generator for an air bag. The gas generating composition comprises (a) tetrazole derivatives, guanidine derivatives or a mixture thereof, (b) a basic metal nitrate and (c) a binder and/or a slag-forming agent.Type: ApplicationFiled: September 5, 2008Publication date: April 23, 2009Inventors: Xingxi Zhou, Kazuyuki Matsuoka, Jianzhou Wu, Yo Yamato, Takeshi Takahori, Kaoru Yamazaki
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Publication number: 20070119530Abstract: A basic metal nitrate suitable as an oxidizing agent for a gas generating agent, which is a basic metal nitrate having a good thermal stability and meeting at least one requirement of the following (a) to (d): (a) a particle diameter of 0.5 to 40 ?m; (b) a degree of crystallinity having 0.4 deg or less of a half band width of the peak in the X-ray analysis; (c) an initiation temperature of weight loss being 220° C. or higher according to TG-DTA analysis; and (d) an impurity content of 1,000 ppm or less based on Na atom. Also, a gas generating composition which has a low toxicity, a high burning rate, and a low combustion temperature and which is used in a gas generator for an air bag. The gas generating composition comprises (a) tetrazole derivatives, guanidine derivatives or a mixture thereof, (b) a basic metal nitrate, and (c) a binder and/or a slag-forming agent.Type: ApplicationFiled: September 1, 2005Publication date: May 31, 2007Inventors: Xingxi Zhou, Kazuyuki Matsuoka, Jianzhou Wu, Yo Yamato, Takeshi Takahori, Kaoru Yamazaki
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Patent number: 6562161Abstract: Gas generating pellets for an air bag system causes the initial inflating speed of the air bag to be increased at a reduced rate to prevent a passenger from being injured due to vigorous inflation of the air bag in the initial period, while maintaining sufficient ability to restrict the passenger after 35 to 50 milliseconds from the start of the inflation. Combustion of the gas generating pellets for an air bag system are controlled such that in a tank test conducted with respect to a gas generator using the pellets, where a desired maximum tank pressure is P (kPa), and a period of time from the start of rising of the tank pressure to the time when the maximum tank pressure P (kPa) is reached is T milliseconds, the tank pressure measured after 0.25×T milliseconds is not higher than 0.20×P (kPa), and the tank pressure measured after 0.80×T milliseconds is not lower than 0.70×P (kPa).Type: GrantFiled: April 29, 1997Date of Patent: May 13, 2003Assignee: Daicel Chemical Industries, Ltd.Inventors: Yo Yamato, Takeshi Takahori, Masayuki Ueda, Shingo Oda
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Patent number: 6527886Abstract: A gas-generant-molded-article for air bags which is prepared by molding a gas generant composition into a cylindrical form containing an opening hole, wherein the relationship between the linear burning velocity r (mm/second) of said gas generant composition under a pressure of 70 kgf/cm2 and a thickness W (mm) of said molded article falls within a range represented by 0.005≦W/(2·r)≦0.3, with the linear burning velocity preferably falling within a range of from 1 to 12.5 mm/second.Type: GrantFiled: March 31, 1997Date of Patent: March 4, 2003Assignee: Daicel Chemical Industries, Ltd.Inventors: Yo Yamato, Norimasa Hirata, Takeshi Takahori, Takushi Yokoyama, Naoki Matsuda
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Publication number: 20030030162Abstract: The present invention provides a process for producing a gas generating agent capable of constantly producing a gas generating agent with a high quality.Type: ApplicationFiled: September 18, 2002Publication date: February 13, 2003Inventors: Akio Yamamoto, Takeshi Takahori
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Publication number: 20030019387Abstract: A gas generator for an air bag which includes a gas generating agent having an automatic igniting function is provided.Type: ApplicationFiled: August 22, 2002Publication date: January 30, 2003Inventors: Yo Yamato, Jianzhou Wu, Takeshi Takahori
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Patent number: 6497774Abstract: A gas-generant-molded-article for air bags which is prepared by molding a gas generant composition into a cylindrical form containing an opening hole, wherein the relationship between the linear burning velocity r (mm/second) of said gas generant composition under a pressure of 70 kgf/cm2 and a thickness W (mm) of said molded article falls within a range represented by 0.005≦W/(2·r)≦0.3, with the linear burning velocity preferably falling within a range of from 1 to 12.5 mm/second.Type: GrantFiled: December 20, 2000Date of Patent: December 24, 2002Assignee: Daicel Chemical Industries, Ltd.Inventors: Yo Yamato, Norimasa Hirata, Takeshi Takahori, Takushi Yokoyama, Naoki Matsuda
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Patent number: 6454887Abstract: A gas-generant-molded-article for air bags which is prepared by molding a gas generant composition into a cylindrical form containing an opening hole, wherein the relationship between the linear burning velocity r (mm/second) of said gas generant composition under a pressure of 70 kgf/cm2 and a thickness W (mm) of said molded article falls within a range represented by 0.005≦W/(2·r)≦0.3, with the linear burning velocity preferably falling within a range of from 1 to 12.5 mm/second.Type: GrantFiled: September 23, 1999Date of Patent: September 24, 2002Assignee: Daicel Chemical Industries, Ltd.Inventors: Yo Yamato, Norimasa Hirata, Takeshi Takahori, Takushi Yokoyama, Naoki Matsuda
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Publication number: 20010000383Abstract: A gas-generant-molded-article for air bags which is prepared by molding a gas generant composition into a cylindrical form containing an opening hole, wherein the relationship between the linear burning velocity r (mm/second) of said gas generant composition under a pressure of 70 kgf/cm2 and a thickness W (mm) of said molded article falls within a range represented by 0.005≦W/(2·r)≦0.3, with the linear burning velocity preferably falling within a range of from 1 to 12.5 mm/second.Type: ApplicationFiled: December 20, 2000Publication date: April 26, 2001Applicant: Daicel Chemical Industries, Ltd.Inventors: Yo Yamato, Norimasa Hirata, Takeshi Takahori, Takushi Yokoyama, Naoki Matsuda