Patents by Inventor Akira Tsuboi
Akira Tsuboi 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: 9163138Abstract: The present invention provides a halogen-containing resin composition comprising 100 parts by weight of a halogen-containing resin; 0.01 to 2.5 parts by weight of a polyvinyl alcohol having a saponification degree of from 60 to 99.9 mol % and a viscosity-average polymerization degree of from 100 to 1,000; 0.01 to 2.5 parts by weight of a polyol having a molecular weight of 2,000 or less and a hydroxyl content of 10% by weight or more; and 0.01 to 5 parts by weight of a zinc compound.Type: GrantFiled: September 22, 2011Date of Patent: October 20, 2015Assignee: KURARAY CO., LTD.Inventors: Takeshi Kusudou, Akira Tsuboi, Masato Nakamae, Yousuke Kumaki, Hideki Maki
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Publication number: 20130253116Abstract: The present invention provides a halogen-containing resin composition comprising 100 parts by weight of a halogen-containing resin; 0.01 to 2.5 parts by weight of a polyvinyl alcohol having a saponification degree of from 60 to 99.9 mol % and a viscosity-average polymerization degree of from 100 to 1,000; 0.01 to 2.5 parts by weight of a polyol having a molecular weight of 2,000 or less and a hydroxyl content of 10% by weight or more; and 0.01 to 5 parts by weight of a zinc compound.Type: ApplicationFiled: September 22, 2011Publication date: September 26, 2013Applicant: Kuraray Co., Ltd.Inventors: Takeshi Kusudou, Akira Tsuboi, Masato Nakamae, Yousuke Kumaki, Hideki Maki
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Publication number: 20120309880Abstract: Provided are a thermal stabilizer for polyvinyl chloride, comprising a mixed powder (P) containing a vinyl alcohol-based polymer (A) having an average degree of saponification from 30 to 99.9 mol % and having a viscosity average degree of polymerization of 1000 or less, and a zinc compound (B), wherein a weight ratio A/B of (A) and (B) falls within a range from 1/10 to 10/1, and the mixed powder (P) has 80 weight % or more of particles passing through a screen with 75 ?m openings, and a polyvinyl chloride resin composition, comprising: from 0.1 to 10 parts by weight of the thermal stabilizer for polyvinyl chloride based on 100 parts by weight of a polyvinyl chloride resin. Such polyvinyl chloride resin composition is excellent in the thermal stability while being molded and allows obtaining a less colored molded article.Type: ApplicationFiled: January 31, 2011Publication date: December 6, 2012Applicant: KURARAY CO., LTD.Inventors: Takeshi Kusudou, Akira Tsuboi, Hideki Maki, Masato Nakamae
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Patent number: 8288465Abstract: A polyvinyl chloride resin composition contains: from 0.005 to 5 parts by weight of a polyvinyl alcohol having a viscosity average degree of polymerization of from 100 to 3000 and having a ratio Mw/Mn of a weight average molecular weight Mw to a number average molecular weight Mn of from 2.2 to 4.9; and from 0.01 to 5 parts by weight of a zinc compound, based on 100 parts by weight of a polyvinyl chloride resin. A polyvinyl chloride resin composition is thereby provided that enables to obtain a shaped article thereof excellent in thermal stability while being shaped and less colored.Type: GrantFiled: October 5, 2009Date of Patent: October 16, 2012Assignees: Kuraray Co., Ltd., Kuraray Europe GmbHInventors: Masaki Kato, Akira Tsuboi, Masato Nakamae, Robert Fuss, Samuel Michel
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Patent number: 8252860Abstract: A polyvinyl chloride resin composition contains: from 0.005 to 5 parts by weight of a vinyl alcohol-based polymer having a degree of saponification of from 75 to 99.9 mol % and having a viscosity average degree of polymerization of 450 or less; and from 0.01 to 5 parts by weight of a zinc compound, based on 100 parts by weight of a polyvinyl chloride resin. A polyvinyl chloride resin composition is thereby provided that is excellent in thermal stability while being shaped and with which a less colored shaped article can be obtained.Type: GrantFiled: June 15, 2009Date of Patent: August 28, 2012Assignee: Kuraray Co., Ltd.Inventors: Masaki Kato, Akira Tsuboi, Masato Nakamae
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Patent number: 8222325Abstract: Thermoplastically processable PVC mixtures having enhanced stability are prepared by incorporating at least one stabilizer containing metal ions and a modified polyvinyl alcohol co-stabilizer.Type: GrantFiled: July 18, 2008Date of Patent: July 17, 2012Assignees: Kuraray Europe GmbH, Kuraray Co., Ltd.Inventors: Samuel Michel, Robert W. Fuss, Masaki Kato, Masato Nakamae, Akira Tsuboi
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Publication number: 20110319541Abstract: A polyvinyl chloride resin composition contains: from 0.005 to 5 parts by weight of a polyvinyl alcohol having structural units expressed by a formula (1); and from 0.01 to 5 parts by weight of a zinc compound, based on 100 parts by weight of a polyvinyl chloride resin. A polyvinyl chloride resin composition is thereby provided that is good in thermal stability and less colored while being shaped and also allows to obtain a shaped article thereof having less rough surface and showing little loss of transparency after melt process. (R1 and R2 independently denote a hydrogen atom, an alkyl group, or an acyl group, respectively. X denotes a single bond or an alkylene group having a carbon number of from 1 to 3 that may be mediated by an oxygen atom.Type: ApplicationFiled: December 24, 2009Publication date: December 29, 2011Applicant: KURARAY CO., LTD.Inventors: Masato Nakamae, Akira Tsuboi, Takeshi Kusudou
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Patent number: 8061498Abstract: A wet clutch friction plate is provided in which a plurality of oil channels (22) are formed in a friction material (21) bonded to one side face or opposite side faces of a core plate (20), the plurality of oil channels (22) providing communication between inner and outer peripheral edges of the friction material (21), and a plurality of oil channels (22) having a discharge angle (?) that discharge oil from an inner peripheral side to an outer peripheral side of the friction plate (15) when the friction plate (15) rotates and a plurality of oil channels (22) having an inflow angle (?) that draw oil in from the outer peripheral side to the inner peripheral side of the friction plate (15) are mixed at substantially equal intervals. In this way, the frictional properties can be stabilized when connection of the clutch is in transition, and the phenomenon of drag due to oil viscosity resistance can be suppressed when the clutch is in an off state.Type: GrantFiled: March 4, 2004Date of Patent: November 22, 2011Assignee: Kabushiki Kaisha F.C.C.Inventors: Akira Tsuboi, Satoshi Kawamura, Mitsuo Miyatsu, Fumiyoshi Iida
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Publication number: 20110213063Abstract: A polyvinyl chloride resin composition contains: from 0.005 to 5 parts by weight of a vinyl alcohol-based polymer having a degree of saponification of from 30 to 99.9 mol %, having a viscosity average degree of polymerization of 1000 or less, and having a carboxyl group, a sulfonic acid group, or a salt thereof at a terminal; and from 0.01 to 5 parts by weight of a zinc compound, based on 100 parts by weight of a polyvinyl chloride resin. In addition, a polyvinyl chloride resin composition contains: from 0.005 to 5 parts by weight of a vinyl alcohol-based polymer having an alkyl group with a carbon number of 6 or more at a terminal, having a degree of saponification of from 30 to 99.9 mol %, and having a viscosity average degree of polymerization of 1000 or less; and from 0.01 to 5 parts by weight of a zinc compound, based on 100 parts by weight of a polyvinyl chloride resin.Type: ApplicationFiled: June 22, 2009Publication date: September 1, 2011Applicant: KURARAY CO., LTD.Inventors: Masaki Kato, Akira Tsuboi, Masato Nakamae
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Publication number: 20110201737Abstract: A polyvinyl chloride resin composition contains: from 0.005 to 5 parts by weight of a polyvinyl alcohol having a viscosity average degree of polymerization of from 100 to 3000 and having a ratio Mw/Mn of a weight average molecular weight Mw to a number average molecular weight Mn of from 2.2 to 4.9; and from 0.01 to 5 parts by weight of a zinc compound, based on 100 parts by weight of a polyvinyl chloride resin. A polyvinyl chloride resin composition is thereby provided that enables to obtain a shaped article thereof excellent in thermal stability while being shaped and less colored.Type: ApplicationFiled: October 5, 2009Publication date: August 18, 2011Applicants: KURARAY CO., LTD., KURARAY EUROPE GmbHInventors: Masaki Kato, Akira Tsuboi, Masato Nakamae, Robert Fuss, Samuel Michel
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Publication number: 20110178217Abstract: A polyvinyl chloride resin composition contains: from 0.005 to 5 parts by weight of a vinyl alcohol-based polymer containing from 0.01 to 15 mol % of a monomer unit having a specific polyoxyalkylene group in a side chain and having a degree of saponification of from 30 to 99.9 mol %; and from 0.01 to 5 parts by weight of a zinc compound, based on 100 parts by weight of a polyvinyl chloride resin. In addition, a polyvinyl chloride resin composition contains: from 0.005 to 5 parts by weight of a vinyl alcohol-based polymer containing from 0.5 to 18 mol % of an ethylene unit and having a degree of saponification of a vinyl acetate unit of from 30 to 99.9 mol %; and from 0.01 to 5 parts by weight of a zinc compound, based on 100 parts by weight of a polyvinyl chloride resin. A polyvinyl chloride resin composition is thereby provided which is excellent in thermal stability while being shaped and with which a less colored shaped article can be obtained.Type: ApplicationFiled: June 15, 2009Publication date: July 21, 2011Applicant: Kuraray Co., Ltd.Inventors: Masaki Kato, Akira Tsuboi, Shinsuke Nii, Masato Nakamae
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Publication number: 20110130504Abstract: A polyvinyl chloride resin composition contains: from 0.005 to 5 parts by weight of a vinyl alcohol-based polymer having a degree of saponification of not less than 30 mol % and less than 75 mol % and having a viscosity average degree of polymerization of less than 300; and from 0.01 to 5 parts by weight of a zinc compound, based on 100 parts by weight of a polyvinyl chloride resin. A polyvinyl chloride resin composition is thereby provided that is good in thermal stability while being shaped and with which a shaped article of excellent transparency can be obtained.Type: ApplicationFiled: June 15, 2009Publication date: June 2, 2011Applicants: KURARAY CO., LTD., KURARAY EUROPE GMBHInventors: Masaki Kato, Akira Tsuboi, Masato Nakamae, Robert Fuss, Samuel Michel
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Patent number: 7934588Abstract: A torque damper can comprise a clutch piston arranged within a cover of a torque converter and can be adapted to be moved between a connected position and a non-connected position relative to the cover. Damper springs can be arranged along the circumference of the clutch piston. Connecting members can be arranged abutting against one end of the damper spring and adapted to connect a turbine arranged within the cover and the clutch piston via the damper spring. Damper holders can be arranged abutting against the other end of the damper spring and adapted to hold the damper spring against the compressive force applied to the damper spring from the connecting member. Guide sheets having wear resistance can be interposed between the circumference of the clutch piston and the damper spring and can be adapted to guide the damper spring. A torque input to the cover can be transmitted to the turbine via the clutch piston and the damper springs when the clutch piston is in the connected position.Type: GrantFiled: September 12, 2008Date of Patent: May 3, 2011Assignee: Kabushiki Kaisha F.C.C.Inventors: Akira Tsuboi, Yoshihiko Ozawa, Yasutaka Amano, Hiromi Fujiwara, Ryo Mochizuki
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Publication number: 20110086964Abstract: A polyvinyl chloride resin composition contains: from 0.005 to 5 parts by weight of a vinyl alcohol-based polymer having a degree of saponification of from 75 to 99.9 mol % and having a viscosity average degree of polymerization of 450 or less; and from 0.01 to 5 parts by weight of a zinc compound, based on 100 parts by weight of a polyvinyl chloride resin. A polyvinyl chloride resin composition is thereby provided that is excellent in thermal stability while being shaped and with which a less colored shaped article can be obtained.Type: ApplicationFiled: June 15, 2009Publication date: April 14, 2011Applicant: KURARAY CO., LTDInventors: Masaki Kato, Akira Tsuboi, Masato Nakamae
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Publication number: 20100234508Abstract: Use of a modified polyvinyl alcohol, obtained by copolymerization of at least on vinyl ester and at least one olefinically unsaturated carboxylic acid or the metal salt, anhydride or ester thereof and subsequent partial saponification of the copolymer as co-stabilizer in thermoplastic processable mixtures based on polyvinyl chloride, containing at least one metal ion stabilizer.Type: ApplicationFiled: July 18, 2008Publication date: September 16, 2010Applicant: KURARAY CO., LTD.Inventors: Samuel Michel, Robert Fuss, Masaki Kato, Masato Nakamae, Akira Tsuboi
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Publication number: 20100190890Abstract: Thermoplastically processable PVC mixtures having enhanced stability are prepared by incorporating at least one stabilizer containing metal ions and a modified polyvinyl alcohol co-stabilizer.Type: ApplicationFiled: July 18, 2008Publication date: July 29, 2010Applicants: KURARAY EUROPE GMBH, KURARAY CO., LTDInventors: Samuel Michel, Robert W. Fuss, Masaki Kato, Masato Nakamae, Akira Tsuboi
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Publication number: 20090071786Abstract: A torque damper can comprise a clutch piston arranged within a cover of a torque converter and can be adapted to be moved between a connected position and a non-connected position relative to the cover. Damper springs can be arranged along the circumference of the clutch piston. Connecting members can be arranged abutting against one end of the damper spring and adapted to connect a turbine arranged within the cover and the clutch piston via the damper spring. Damper holders can be arranged abutting against the other end of the damper spring and adapted to hold the damper spring against the compressive force applied to the damper spring from the connecting member. Guide sheets having wear resistance can be interposed between the circumference of the clutch piston and the damper spring and can be adapted to guide the damper spring. A torque input to the cover can be transmitted to the turbine via the clutch piston and the damper springs when the clutch piston is in the connected position.Type: ApplicationFiled: September 12, 2008Publication date: March 19, 2009Applicant: Kabushiki Kaisha F.C.C.Inventors: Akira Tsuboi, Yoshihiko Ozawa, Yasutaka Amano, Hiromi Fujiwara, Ryo Mochizuki
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Publication number: 20070278062Abstract: A wet clutch friction plate is provided in which a plurality of oil channels (22) are formed in a friction material (21) bonded to one side face or opposite side faces of a core plate (20), the plurality of oil channels (22) providing communication between inner and outer peripheral edges of the friction material (21), and a plurality of oil channels (22) having a discharge angle (?) that discharge oil from an inner peripheral side to an outer peripheral side of the friction plate (15) when the friction plate (15) rotates and a plurality of oil channels (22) having an inflow angle (?) that draw oil in from the outer peripheral side to the inner peripheral side of the friction plate (15) are mixed at substantially equal intervals. In this way, the frictional properties can be stabilized when connection of the clutch is in transition, and the phenomenon of drag due to oil viscosity resistance can be suppressed when the clutch is in an off state.Type: ApplicationFiled: March 4, 2004Publication date: December 6, 2007Inventors: Akira Tsuboi, Satoshi Kawamura, Mitsuo Miyatsu, Fumiyoshi Iida
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Publication number: 20070251791Abstract: A lock-up clutch can include a clutch piston arranged within a cover of a torque converter and adapted to be moved between a connected position and a non-connected position relative to the torque converter cover. A containing recess can be formed on a circumferential edge of the clutch piston for containing damper springs and connecting members for connecting a turbine arranged within the torque converter cover and the clutch piston via the damper springs contained within the containing recess. An independent member forming an outer circumferential portion of the containing recess can be arranged oppositely to the outer surface of each damper spring.Type: ApplicationFiled: April 26, 2007Publication date: November 1, 2007Applicant: KABUSHIKI KAISHA F.C.C.Inventors: Hiromi Fujiwara, Ryo Mochizuki, Yoshihiko Ozawa, Yasutaka Amano, Akira Tsuboi
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Patent number: 7137115Abstract: A method for controlling parallel threads such that the speed of running programs increases and system resources are used efficiently. The method includes monitoring a number of running threads performing parallel processing and a number of standby threads that are in a standby state, and terminating standby threads in accordance with the number of the running threads and the number of the standby threads.Type: GrantFiled: December 28, 2000Date of Patent: November 14, 2006Assignee: Fujitsu LimitedInventors: Satoshi Sakamoto, Masanori Iwazaki, Akira Tsuboi