Patents by Inventor Hiroyasu Yamauchi
Hiroyasu Yamauchi 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: 8231805Abstract: The present invention provides a liquid crystalline polyester composition comprising a liquid crystalline polyester, a fibrous filler, a plate-like filler and a granular filler. The connector obtained using the liquid crystalline polyester composition has poor filling suppressed and is excellent in warp resistance and crack resistance.Type: GrantFiled: November 12, 2010Date of Patent: July 31, 2012Assignee: Sumitomo Chemical Company, LimitedInventors: Yoshiyuki Fukuhara, Hiroyasu Yamauchi
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Patent number: 8202448Abstract: A liquid-crystalline polyester resin composition is provided including a liquid-crystalline polyester obtained by polymerizing monomers of an aromatic hydroxycarboxylic acid in the presence of an imidazole compound. The composition also includes a mica which is a muscovite and has a volume average particle diameter of 40 ?m or less and a specific surface area of 6 m2/g or less, the amount of the mica being 15 to 100 parts by weight based on 100 parts by weight of the liquid-crystalline polyester. The liquid-crystalline polyester resin composition has melt fluidity sufficient to be molded into a connector having an ultra-thin wall thickness portion. The resulting connector has sufficiently suppressed warp and sufficient soldering resistance.Type: GrantFiled: December 23, 2009Date of Patent: June 19, 2012Assignee: Sumitomo Chemical Company, LimitedInventors: Yoshiyuki Fukuhara, Hiroyasu Yamauchi
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Patent number: 8177433Abstract: A housing for a hydrodynamic bearing unit of this type is formed from a resin material having high oil resistance and low outgassing property to ensure the cleanliness of the bearing unit. An ester-based lubricating oil is used as a lubricating oil filled inside the hydrodynamic bearing unit 1, and the housing 7 is formed from an LCP-based resin material.Type: GrantFiled: August 2, 2005Date of Patent: May 15, 2012Assignees: NTN Corporation, Sumitomo Chemical Co., LtdInventors: Kenji Ito, Fuminori Satoji, Hiroyasu Yamauchi, Mitsuo Maeda
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Patent number: 7985351Abstract: A liquid crystalline polyester resin composition comprising 100 parts by weight of a liquid crystalline polyester; 50 to 150 parts by weight of at least one whisker selected from aluminum borate whisker and titanium oxide whisker; and 1 to 30 parts by weight of carbon black having a specific surface area of at least 200 m2/g. This liquid crystalline polyester resin composition has excellent mechanical properties and provides an insulator which is hardly charged.Type: GrantFiled: August 2, 2005Date of Patent: July 26, 2011Assignees: Sumitomo Chemical Co., Ltd., NTN CorporationInventors: Hiroyasu Yamauchi, Mitsuo Maeda, Fuminori Satoji, Kenji Ito
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Publication number: 20110114884Abstract: The present invention provides a liquid crystalline polyester composition comprising a liquid crystalline polyester, a fibrous filler, a plate-like filler and a granular filler. The connector obtained using the liquid crystalline polyester composition has poor filling suppressed and is excellent in warp resistance and crack resistance.Type: ApplicationFiled: November 12, 2010Publication date: May 19, 2011Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Yoshiyuki FUKUHARA, Hiroyasu YAMAUCHI
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Publication number: 20100163796Abstract: A liquid-crystalline polyester resin composition is provided including a liquid-crystalline polyester obtained by polymerizing monomers of an aromatic hydroxycarboxylic acid in the presence of an imidazole compound. The composition also includes a mica which is a muscovite and has a volume average particle diameter of 40 ?m or less and a specific surface area of 6 m2/g or less, the amount of the mica being 15 to 100 parts by weight based on 100 parts by weight of the liquid-crystalline polyester. The liquid-crystalline polyester resin composition has melt fluidity sufficient to be molded into a connector having an ultra-thin wall thickness portion. The resulting connector has sufficiently suppressed warp and sufficient soldering resistance.Type: ApplicationFiled: December 23, 2009Publication date: July 1, 2010Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Yoshiyuki FUKUHARA, Hiroyasu YAMAUCHI
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Publication number: 20090034888Abstract: A housing for a hydrodynamic bearing unit of this type is formed from a resin material having high oil resistance and low outgassing property to ensure the cleanliness of the bearing unit. An ester-based lubricating oil is used as a lubricating oil filled inside the hydrodynamic bearing unit 1, and the housing 7 is formed from an LCP-based resin material.Type: ApplicationFiled: August 2, 2005Publication date: February 5, 2009Inventors: Kenji Ito, Fuminori Satoji, Hiroyasu Yamauchi, Mitsuo Maeda
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Publication number: 20070219301Abstract: A liquid crystalline polyester resin composition comprising 100 parts by weight of a liquid crystalline polyester; 50 to 150 parts by weight of at least one whisker selected from aluminum borate whisker and titanium oxide whisker; and 1 to 30 parts by weight of carbon black having a specific surface area of at least 200 m2/g. This liquid crystalline polyester resin composition has excellent mechanical properties and provides an insulator which is hardly charged.Type: ApplicationFiled: August 2, 2005Publication date: September 20, 2007Applicants: SUMITOMO CHEMICAL CO., LTD., NTN CORPORATIONInventors: Hiroyasu Yamauchi, Mitsuo Maeda, Fuminori Satoji, Kenji Ito
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Patent number: 6733691Abstract: A liquid crystal polyester resin composition having an apparent melt viscosity of 10 to 100 Pa ·sec at a shearing rate of 1000 sec−1 and at a flow temperature +40° C., obtained by compounding 10 to 100 parts by weight of an inorganic filler in the form of fiber and 10 to 100 parts by weight of an inorganic filler in the form of plate based on 100 parts by weight of a liquid crystal polyester resin, wherein the liquid crystal polyester resin contains at least 30% mol of a repeating structural unit of the following formula A1 and has a flow temperature of 270° C. to 400° C., the inorganic filler in the form of fiber has an average fiber diameter of 0.Type: GrantFiled: March 26, 2002Date of Patent: May 11, 2004Assignee: Sumitomo Chemical Company, LimitedInventors: Satoshi Nagano, Hiroyasu Yamauchi
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Patent number: 6680002Abstract: The object of the present invention is to provide a liquid crystalline polyester resin composition for connectors that is excellent in fluidity at the time of molding and is therefore capable of producing connectors with further suppressed degree of warpage. The object is achieved by providing a liquid crystalline polyester resin composition for connectors comprising a liquid crystalline polyester resin mixture which comprises a liquid crystalline polyester (A) having a specific flow beginning temperature and a liquid crystalline polyester resin (B) having a specific flow beginning temperature and the flow beginning temperature between the liquid crystalline polyester resin (A) and the liquid crystalline polyester resin (B) is from 20° C. to 60° C., and from 15 to 180 parts by weight of a fibrous and/or plate-shaped inorganic filler; wherein both of the liquid crystalline polyester resin (A) and the liquid crystalline polyester resin (B) are produced by the specific method.Type: GrantFiled: February 4, 2003Date of Patent: January 20, 2004Assignee: Sumitomo Chemical Company, LimitedInventors: Hiroyasu Yamauchi, Satoshi Okamoto, Satoshi Nagano
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Publication number: 20030168634Abstract: The object of the present invention is to provide a liquid crystalline polyester resin composition for connectors that is excellent in fluidity at the time of molding and is therefore capable of producing connectors with further suppressed degree of warpage. The object is achieved by providing a liquid crystalline polyester resin composition for connectors comprising a liquid crystalline polyester resin mixture which comprises a liquid crystalline polyester (A) having a specific flow beginning temperature and a liquid crystalline polyester resin (B) having a specific flow beginning temperature and the flow beginning temperature between the liquid crystalline polyester resin (A) and the liquid crystalline polyester resin (B) is from 20° C. to 60° C., and from 15 to 180 parts by weight of a fibrous and/or plate-shaped inorganic filler; wherein both of the liquid crystalline polyester resin (A) and the liquid crystalline polyester resin (B) are produced by the specific method.Type: ApplicationFiled: February 4, 2003Publication date: September 11, 2003Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Hiroyasu Yamauchi, Satoshi Okamoto, Satoshi Nagano
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Publication number: 20030001139Abstract: A liquid crystal polyester resin composition having an apparent melt viscosity of 10 to 100 Pa·sec at a shearing rate of 1000 sec−1 and a flow temperature of +40° C., obtained by compounding 10 to 100 parts by weight of an inorganic filler in the form of fiber and 10 to 100 parts by weight of an inorganic filler in the form of plate based on 100 parts by weight of a liquid crystal polyester resin, wherein the liquid crystal polyester resin contains at least 30 molt of a repeating structural unit of the following formula Al and has a flow temperature of 270° C. to 400° C., the inorganic filler in the form of fiber has an average fiber diameter of 0.Type: ApplicationFiled: March 26, 2002Publication date: January 2, 2003Inventors: Satoshi Nagano, Hiroyasu Yamauchi