Patents by Inventor Wataru Sawaguchi

Wataru Sawaguchi 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: 11414616
    Abstract: A lubricating grease composition containing a base oil having a kinematic viscosity of 10 mm2/s or more and 60 mm2/s or less at 40° C.; a thickener containing at least one soap selected from a metal soap and a metal complex soap; and a solid lubricant containing porous polyamide particles. An amount of the porous polyamide particles blended is 1% by mass or more and 20% by mass or less based on a total mass of the lubricating grease composition.
    Type: Grant
    Filed: December 2, 2019
    Date of Patent: August 16, 2022
    Assignee: NOK KLUEBER CO., LTD.
    Inventor: Wataru Sawaguchi
  • Patent number: 10907113
    Abstract: A lubricating grease composition includes a base oil, a thickener, and a solid lubricant, wherein the base oil is a synthetic hydrocarbon oil with a kinematic viscosity of 600 to 2000 mm2/s at 40° C., the thickener is a barium complex soap, and the solid lubricant is an inorganic fine particle with Mohs hardness of 3 to 6 and an average particle size of 10 to 40 ?m.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: February 2, 2021
    Assignees: NOK KLUEBER CO., LTD., DENSO CORPORATION
    Inventors: Wataru Sawaguchi, Yuta Miyagawa, Ryousuke Oguri
  • Patent number: 10899990
    Abstract: The present disclosure is related to provide a lubricating grease composition having a high static friction coefficient while maintaining excellent low-temperature torque characteristics, high-temperature shear stability, and high-temperature oil separation characteristics. A lubricating grease composition of the present disclosure contains a base oil, a thickener, and a solid lubricant, wherein the solid lubricant is calcium carbonate, the amount of the calcium carbonate blended is 1 to 60% by weight based on the total weight of the lubricating grease composition, the calcium carbonate has an average particle diameter of 0.1 to 30 ?m, the base oil has a kinematic viscosity of 18 to 300 mm2/s at 40° C., and the lubricating grease composition has a worked penetration of 240 to 320.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: January 26, 2021
    Assignee: NOK KLUEBER CO., LTD.
    Inventors: Wataru Sawaguchi, Kohei Matsumoto
  • Publication number: 20200332215
    Abstract: A lubricating grease composition containing a base oil having a kinematic viscosity of 10 mm2/s or more and 60 mm2/s or less at 40° C.; a thickener containing at least one soap selected from a metal soap and a metal complex soap; and a solid lubricant containing porous polyamide particles. An amount of the porous polyamide particles blended is 1% by mass or more and 20% by mass or less based on a total mass of the lubricating grease composition.
    Type: Application
    Filed: December 2, 2019
    Publication date: October 22, 2020
    Applicant: NOK KLUEBER CO., LTD.
    Inventor: Wataru SAWAGUCHI
  • Patent number: 10479955
    Abstract: A lubricating grease composition for a resin member is used to be supplied as a lubricant on a surface of at least a sliding portion of a resin member including the sliding portion with an other member. The lubricating grease composition for a resin member contains a base oil which is a mixed oil of a poly-?-olefin having a kinetic viscosity at 40° C. of 18 to 50 mm2/s and an ethylene-?-olefin copolymer having a number average molecular weight of 40,000 to 200,000, a lithium-based complex soap as a thickener and a polytetrafluoroethylene resin as a solid lubricant having a mixing ratio of 4 to 12 mass % to the entire lubricating grease composition, wherein the base oil has a kinetic viscosity at 40° C. of 80 to 200 mm2/s and a worked penetration of the lubricating grease composition ranges from 265 to 340.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: November 19, 2019
    Assignee: Nok Klueber Co., Ltd.
    Inventors: Wataru Sawaguchi, Motoyuki Inai, Akira Shinozaki
  • Publication number: 20190241826
    Abstract: A lubricating grease composition includes a base oil, a thickener, and a solid lubricant, wherein the base oil is a synthetic hydrocarbon oil with a kinematic viscosity of 600 to 2000 mm2/s at 40° C., the thickener is a barium complex soap, and the solid lubricant is an inorganic fine particle with Mohs hardness of 3 to 6 and an average particle size of 10 to 40 ?m.
    Type: Application
    Filed: February 4, 2019
    Publication date: August 8, 2019
    Inventors: Wataru SAWAGUCHI, Yuta MIYAGAWA, Ryousuke OGURI
  • Publication number: 20190169522
    Abstract: The present disclosure is related to provide a lubricating grease composition having a high static friction coefficient while maintaining excellent low-temperature torque characteristics, high-temperature shear stability, and high-temperature oil separation characteristics. A lubricating grease composition of the present disclosure contains a base oil, a thickener, and a solid lubricant, wherein the solid lubricant is calcium carbonate, the amount of the calcium carbonate blended is 1 to 60% by weight based on the total weight of the lubricating grease composition, the calcium carbonate has an average particle diameter of 0.1 to 30 ?m, the base oil has a kinematic viscosity of 18 to 300 mm2/s at 40° C., and the lubricating grease composition has a worked penetration of 240 to 320.
    Type: Application
    Filed: February 7, 2019
    Publication date: June 6, 2019
    Inventors: Wataru SAWAGUCHI, Kohei MATSUMOTO
  • Publication number: 20180340130
    Abstract: A lubricant composition comprises a perfluoropolyether oil and an adhesive component.
    Type: Application
    Filed: April 27, 2018
    Publication date: November 29, 2018
    Inventors: Wataru Sawaguchi, Yusuke Asada, Takahiro Nozu, Takumi Shiomi, Kyoji Inukai
  • Publication number: 20180016516
    Abstract: A lubricating grease composition for a resin member is used to be supplied as a lubricant on a surface of at least a sliding portion of a resin member including the sliding portion with an other member. The lubricating grease composition for a resin member contains a base oil which is a mixed oil of a poly-?-olefin having a kinetic viscosity at 40° C. of 18 to 50 mm2/s and an ethylene-?-olefin copolymer having a number average molecular weight of 40,000 to 200,000, a lithium-based complex soap as a thickener and a polytetrafluoroethylene resin as a solid lubricant having a mixing ratio of 4 to 12 mass % to the entire lubricating grease composition, wherein the base oil has a kinetic viscosity at 40° C. of 80 to 200 mm2/s and a worked penetration of the lubricating grease composition ranges from 265 to 340.
    Type: Application
    Filed: September 21, 2017
    Publication date: January 18, 2018
    Inventors: Wataru Sawaguchi, Motoyuki Inai, Akira Shinozaki
  • Publication number: 20180016517
    Abstract: A lubricating grease composition for a polyamide resin member is used to be supplied as a lubricant on a surface of at least a sliding portion of the polyamide resin member including the sliding portion with an other member. The lubricating grease composition for a polyamide resin member contains a base oil which is a synthetic hydrocarbon oil, and a thickener which is at least one metal complex soap of a barium complex soap and a lithium complex soap, wherein a kinetic viscosity at 40° C. of the base oil ranges from 30 to 200 mm2/s and a drop point of the thickener is 270° C. or more.
    Type: Application
    Filed: September 21, 2017
    Publication date: January 18, 2018
    Inventors: Wataru Sawaguchi, Motoyuki Inai, Akira Shinozaki
  • Patent number: 8247361
    Abstract: A fluorine-based lubricant composition comprising a base oil and a fluorine-containing compound represented by the general formula: CF3(CF2)n O(CF2O)p(C2F4O)q(C3F6O)rRfCONHAr (wherein, Ar is a 2-benzimidazole group, Rf is a fluorocarbon group of carbon number of from 1 or 2, n is 0, 1 or 2, p, q and r are an integer satisfying the condition p+q+r?100, where one or two of p, q and r may be 0, and the CF2O group, the CF2O4 group and the C3F6O group are the groups bound randomly in the main chain) as an additive containing in the base oil. The fluorine-based lubricant composition has an improved long term anti-rust property and thermal resistance property, and further the fluorine-based lubricant composition obtained by adding a thickening agent to the composition reduces abrasion of the sliding member such as electric contact having a noble metal surface including a gold or silver plating surface, a copper surface and a copper alloy surface.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: August 21, 2012
    Assignee: NOK Kluber Co., Ltd.
    Inventors: Akihiko Shimura, Ayumi Yamazaki, I, Wataru Sawaguchi, Masaki Tahara, Yoshihito Tani, Toshio Nitta
  • Patent number: 8242065
    Abstract: A grease composition, which comprises a base oil selected from at least one of synthetic hydrocarbon oil, ester-based synthetic oil, and ether-based synthetic oil; a thickening agent selected from at least one of lithium-based soap, lithium-based complex soap, and a urea-based compound; polytetrafluoroethylene resin powders having a number average molecular weight Mn of 20,000-100,000; and zinc dialkyldithiophosphate having straight or branched alkyl groups of at least 3 carbon atoms, preferably 5-13 carbon atoms, and more preferably 8-12 carbon atoms, has not only a distinguished lubricability, when applied to plastic members, but also a distinguished durability as given by change in friction coefficient and wear loss, after the sliding test.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: August 14, 2012
    Assignee: NOK Kluber Co., Ltd.
    Inventors: Wataru Sawaguchi, Toshio Nitta
  • Patent number: 8188018
    Abstract: A lubricating oil composition for use in oil-impregnated sintered bearings together with a resin member having C?C bonds or C?O groups in the molecules, which comprises a base oil comprising a synthetic hydrocarbon oil as the main component, and 0.1-30% by weight of an ester-based oil on the basis of total composition, and free from zinc dialkyldithiophosphate and molybdenum dialkyldithiocarbamate, where the synthetic hydrocarbon oil as the main component of the base oil has substantially no adverse effect on resin, can minimize an adverse effect on various metal species of sintered materials by suppressing a mixing amount of a wear inhibitor or an extreme pressure agent to a minimum, without deteriorating a good lubricability required for the lubricating oil in oil-impregnated sintered bearings.
    Type: Grant
    Filed: April 18, 2007
    Date of Patent: May 29, 2012
    Assignee: NOK Kluber Co., Ltd.
    Inventors: Miyuki Hashida, Wataru Sawaguchi, Toshio Nitta
  • Publication number: 20100267597
    Abstract: A fluorine-based lubricant composition comprising a base oil and a fluorine-containing compound represented by the general formula: CF3(CF)n(CF2O)p(C2F4O)q(C3F6O)rRfCONHAr (wherein, Ar is a 2-benzimidazole group, Rf is a fluorocarbon group of carbon number of from 1 or 2, n is 0, 1 or 2, p, q and r are an integer satisfying the condition p+q+r?100, where one or two of p, q and r may be 0, and the CF2O group, the CF2O4 group and the C3F6O group are the groups bound randomly in the main chain) as an additive containing in the base oil. The fluorine-based lubricant composition has an improved long term anti-rust property and thermal resistance property, and further the fluorine-based lubricant composition obtained by adding a thickening agent to the composition reduces abrasion of the sliding member such as electric contact having a noble metal surface including a gold or silver plating surface, a copper surface and a copper alloy surface.
    Type: Application
    Filed: April 21, 2010
    Publication date: October 21, 2010
    Applicant: NOK KLUBER CO., LTD.
    Inventors: Akihiko SHIMURA, Ayumi YAMAZAKI, I, Wataru SAWAGUCHI, Masaki TAHARA, Yoshihito TANI, Toshio NITTA
  • Publication number: 20090270290
    Abstract: A grease composition, which comprises a base oil selected from at least one of synthetic hydrocarbon oil, ester-based synthetic oil, and ether-based synthetic oil; a thickening agent selected from at least one of lithium-based soap, lithium-based complex soap, and a urea-based compound; polytetrafluoroethylene resin powders having a number average molecular weight Mn of 20,000-100,000; and zinc dialkyldithiophosphate having straight or branched alkyl groups of at least carbon atoms, preferably 5-13 carbon atoms, and more preferably 8-12 carbon atoms, has not only a distinguished lubricability, when applied to plastic members, but also a distinguished durability as given by change in friction coefficient and wear loss, after the sliding test.
    Type: Application
    Filed: October 2, 2007
    Publication date: October 29, 2009
    Applicant: NOK KLUBER CO., LTD.
    Inventors: Wataru Sawaguchi, Toshio Nitta
  • Publication number: 20090105103
    Abstract: A lubricating oil composition for use in oil-impregnated sintered bearings together with a resin member having C?C bonds or C?O groups in the molecules, which comprises a base oil comprising a synthetic hydrocarbon oil as the main component, and 0.1-30% by weight of an ester-based oil on the basis of total composition, and free from zinc dialkyldithiophosphate and molybdenum dialkyldithiocarbamate, where the synthetic hydrocarbon oil as the main component of the base oil has substantially no adverse effect on resin, can minimize an adverse effect on various metal species of sintered materials by suppressing a mixing amount of a wear inhibitor or an extreme pressure agent to a minimum, without deteriorating a good lubricability required for the lubricating oil in oil-impregnated sintered bearings.
    Type: Application
    Filed: April 18, 2007
    Publication date: April 23, 2009
    Inventors: Miyuki Hashida, Wataru Sawaguchi, Toshio Nitta
  • Publication number: 20080167208
    Abstract: A lubricant in the form of lubricating oil or grease, for use in contact with graphite or molybdenum disulfide or in contact with aluminum materials, which comprises a perfluoropolyether oil free from (CF2O)n groups as a repeat unit of polymer and having a kinetic viscosity at 40° C. of 50-1,500 mm2/sec., as a base oil, where F(CF2CF2CF2O)mC2F5 or RfO[CF(CF3)CF2O]p(CF2CF2O)qRf? s used as the perfluoropolyether base oil. The lubricant undergoes no considerable deterioration of high-temperature characteristics (high-temperature durability), even if used in various uses as mentioned above, and also has distinguished low-temperature characteristics when the base oil has a kinetic viscosity of 50-250 mm2/sec.
    Type: Application
    Filed: February 17, 2006
    Publication date: July 10, 2008
    Inventors: Miyuki Hashida, Wataru Sawaguchi, Toshio Nitta, Tatsuya Hashimoto, Akihiko Shimura, Jiro Yurimoto