Patents by Inventor Hiroshi Nagakawa
Hiroshi Nagakawa 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).
-
Patent number: 8394749Abstract: The present invention provides a pressure-medium oil comprising at least one of a hydrocarbon compound and an ether compound and having the following properties (1) to (4): (1) a kinematic viscosity as measured at 40° C. of 2 to 30 mm2/s; (2) a viscosity index of 110 or higher; (3) a density as measured at 15° C. of 0.86 g/cm3 or less; and (4) a pour point of ?50° C. or lower. The pressure-medium oil does not solidify under an ultra-high pressure, for example, 1.5 GPa or higher, and has a low pour point and excellent compatibility with test samples and with the material of the apparatus employed in the test.Type: GrantFiled: October 30, 2006Date of Patent: March 12, 2013Assignee: Idemitsu Kosan Co., Ltd.Inventors: Shoji Aoyama, Keizo Murata, Hiroshi Nagakawa, Tahei Okada
-
Patent number: 8337033Abstract: A washing counter, including a bowl portion having a concave configuration used for washing and the like, a counter portion supporting the bowl portion, and a light source portion disposed on a backside of the bowl portion to emit light toward the bowl portion. The light radiates from the surface of the bowl to the surroundings with at least one portion of the bowl portion being formed of a transparent member. The transparent member is obtained by dispersing a light diffusing member in a base member having a transparent raw material having light-transmitting transparency. The light diffusing member being a micro particle having a transparent raw material having a light refractive index different from a light refractive index of the base member.Type: GrantFiled: May 15, 2009Date of Patent: December 25, 2012Assignee: Toto LtdInventors: Takeshi Kaneda, Masanobu Wano, Hiroshi Nagakawa, Shigeru Asoh, Chihiro Sugiyama, Mitsunori Koga, Masaaki Ezawa
-
Publication number: 20110164418Abstract: A washing counter of the invention is characterized by: a bowl portion having a concave configuration used for washing and the like; a counter portion supporting the bowl portion; and a light source portion disposed on a backside of the bowl portion to emit light toward the bowl portion, where the washing counter radiates the light from the light source portion to surroundings from a surface of the bowl portion, at least one portion of the bowl portion is formed of a transparent member obtained by dispersing a light diffusing member in a base member having a transparent raw material having a light-transmitting transparency, the light diffusing member is a micro particle having a transparent raw material having a light refractive index different from a light refractive index of the base member, the light source portion is disposed to face an end face of a butt portion of the transparent member, and at least one portion of the transparent member is a light radiation portion where the light from the light sourceType: ApplicationFiled: May 15, 2009Publication date: July 7, 2011Applicant: TOTO LTD.Inventors: Takeshi Kaneda, Masanobu Wano, Hiroshi Nagakawa, Shigeru Asoh, Chihiro Sugiyama, Mitsunori Koga, Masaaki Ezawa
-
Patent number: 7531488Abstract: Disclosed is a lubricating oil for compression-type refrigerator comprising, as a main component, a polyoxyalkyleneglycol derivative represented by the general formula: R1[(OR2)mOR3]n wherein symbols are as defined in the specification. Said lubricating oil has a favorable compatibility with refrigerants and an excellent lubricating property, and is utilized as the lubricating oil for compression-type refrigerator employing hydrogen-containing fluorocarbon compound refrigerants including R-134a or fluorocarbon compound refrigerants without hydrogen.Type: GrantFiled: August 28, 2001Date of Patent: May 12, 2009Assignee: Idemitsu Kosan Co., Ltd.Inventors: Yasuhiro Kawaguchi, Nobuaki Shimizu, Masato Kaneko, Hiroshi Nagakawa
-
Patent number: 7517839Abstract: A lubricating oil for compression-type refrigerator includes, as a main component, a polyoxyalkyleneglycol derivative represented by the general formula: R1(OR2)m-OR3]n wherein R1 is a methyl group, R2 is a propylene group, R3 is a methyl group, n is an integer of 1 and m is an integer of 12 to 80, and 1,1,1,2-tetrafluoroethane. The derivative has a kinematic viscosity of 5 to 50 cSt at 100° C.Type: GrantFiled: September 12, 2002Date of Patent: April 14, 2009Assignee: Idemitsu Kosan Co., Ltd.Inventors: Yasuhiro Kawaguchi, Nobuaki Shimizu, Masato Kaneko, Hiroshi Nagakawa
-
Publication number: 20090071870Abstract: The present invention provides a pressure-medium oil comprising at least one of a hydrocarbon compound and an ether compound and having the following properties (1) to (4): (1) a kinematic viscosity as measured at 40° C. of 2 to 30 mm2/s; (2) a viscosity index of 110 or higher; (3) a density as measured at 15° C. of 0.86 g/cm3 or less; and (4) a pour point of ?50° C. or lower. The pressure-medium oil does not solidify under an ultra-high pressure, for example, 1.5 GPa or higher, and has a low pour point and excellent compatibility with test samples and with the material of the apparatus employed in the test.Type: ApplicationFiled: October 30, 2006Publication date: March 19, 2009Applicant: Idemitsu Kosan Co., Ltd.Inventors: Shoji Aoyama, Keizo Murata, Hiroshi Nagakawa, Tahei Okada
-
Patent number: 6878677Abstract: The invention provides a refrigerator oil composition comprising a base oil of a mineral oil and/or a synthetic oil, and containing (a) a partial ester of a polyalcohol and a fatty acid and (b) an acid phosphate or its amine salt; and a refrigerator oil composition comprising a base oil of a mineral oil and/or a synthetic oil, and containing any of (a) acid phosphates or their amine salts, (b) acetylene glycol alkylene oxide adducts, (c) potassium salts of fatty acids, etc., (d) organic acids, and (e) fatty acid amides. The refrigerator oil compositions have good lubricity and are especially effective for reducing the friction in both the oil region and the extreme-pressure region in the sliding area between aluminium materials and steel materials.Type: GrantFiled: March 1, 2000Date of Patent: April 12, 2005Assignee: Idemitsu Kosan Co., Ltd.Inventors: Shuichi Sakanoue, Masahiko Takesue, Youichiro Jido, Minoru Takagi, Shoichi Tominaga, Hiroshi Nagakawa
-
Publication number: 20030127622Abstract: A lubricating oil for compression-type refrigerator includes, as a main component, a polyoxyalkyleneglycol derivative represented by the general formula:Type: ApplicationFiled: September 12, 2002Publication date: July 10, 2003Inventors: Yasuhiro Kawaguchi, Nobuaki Shimizu, Masato Kaneko, Hiroshi Nagakawa
-
Patent number: 6475405Abstract: Disclosed is a lubricating oil for compression-type refrigerator comprising, as a main component, a polyoxyalkyleneglycol derivative represented by the general formula: R1[(OR2)mOR3]n wherein symbols are as defined in the specification. Said lubricating oil has a favorable compatibility with refrigerants and an excellent lubricating property, and is utilized as the lubricating oil for compression-type refrigerator employing hydrogen-containing fluorocarbon compound refrigerants including R-134a or fluorocarbon compound refrigerants without hydrogen.Type: GrantFiled: October 28, 1991Date of Patent: November 5, 2002Assignee: Idemitsu Kosan Co., Ltd.Inventors: Yasuhiro Kawaguchi, Nobuaki Shimizu, Masato Kaneko, Hiroshi Nagakawa
-
Patent number: 6465400Abstract: The present invention relates to a lubricant composition for a high temperature of which the amount evaporated in a thin film at a high temperature is controlled and of which the fluidity is maintained for a long period of time, and it is a lubricant composition for a high temperature which is obtained by mixing a base oil composition comprising (a) 20 to 100% by weight of a specific aromatic ester and (b) 0 to 80% by weight of another base oil with (c) 0.1 to 10% by weight, based on the total amount of the lubricant composition, of an antioxidant.Type: GrantFiled: June 21, 2001Date of Patent: October 15, 2002Assignee: Idemitsu Kosan Co., Ltd.Inventors: Hideto Kamimura, Hiroshi Nagakawa
-
Patent number: 6458288Abstract: Disclosed is a lubricating oil for compression-type refrigerator comprising, as a main component, a polyoxyalkyleneglycol derivative represented by the general formula: R1&Brketopenst;(OR2&Parenclosest;mOR3]n wherein symbols are as defined in the specification. Said lubricating oil has a favorable compatibility with refrigerants and an excellent lubricating property, and is utilized as the lubricating oil for compression-type refrigerator employing hydrogen-containing fluorocarbon compound refrigerants including R-134a.Type: GrantFiled: April 2, 1990Date of Patent: October 1, 2002Assignee: Idemitsu Kosan Co., Ltd.Inventors: Yasuhiro Kawaguchi, Nobuaki Shimizu, Masato Kaneko, Hiroshi Nagakawa
-
Publication number: 20020077255Abstract: Disclosed is a lubricating oil for compression-type refrigerator comprising, as a main component, a polyoxyalkyleneglycol derivative represented by the general formula: 1Type: ApplicationFiled: August 28, 2001Publication date: June 20, 2002Inventors: Yasuhiro Kawaguchi, Nobuaki Shimizu, Masato Kaneko, Hiroshi Nagakawa
-
Patent number: 4800030Abstract: The present invention, in one embodiment thereof, relates to a refrigerator oil composition comprising:(1) mineral oil, synthetic oil of a mixture thereof; and(2) at least one phosphorus compound.In another embodiment, the present invention relates to a refrigerator oil composition comprising the above refrigerator oil composition and further containing triarylphosphoric acid ester.In accordance with the present invention, there can be obtained a refrigerator oil composition which is greatly increased in extreme pressure properties and abration resistance.Type: GrantFiled: December 18, 1986Date of Patent: January 24, 1989Assignee: Idemitsu Kosan Company LimitedInventors: Masato Kaneko, Hiroshi Nagakawa, Kenichi Yamashita
-
Patent number: RE39382Abstract: The present invention relates to a lubricant composition for a high temperature of which the amount evaporated in a thin film at a high temperature is controlled and of which the fluidity is maintained for a long period of time, and it is a lubricant composition for a high temperature which is obtained by mixing a base oil composition comprising (a) 20 to 100% by weight of a specific aromatic ester and (b) 0 to 80% by weight of another base oil with (c) 0.1 to 10% by weight, based on the total amount of the lubricant composition, of an antioxidant.Type: GrantFiled: December 22, 1999Date of Patent: November 7, 2006Assignee: Idemitsu Kosan Co., Ltd.Inventors: Hideto Kamimura, Hiroshi Nagakawa