Patents by Inventor Kazunori Kubota

Kazunori Kubota 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).

  • Publication number: 20090154856
    Abstract: To provide a wheel support bearing assembly, which is effective to avoid an inner race detachment during assemblage onto an automotive vehicle. The assembly is provided with an inner member made up of a hub axle and an inner race mounted on an outer periphery of an inboard end portion of the hub axle. The inner race has an inner periphery provided with an stepped area that extends to an inboard annular face of the inner race and has a depth measured at an inner peripheral edge of an inboard annular face, and an inner surface of this stepped area is of a shape made up of a straight area and an inclined surface continued from an outboard end of the straight area to the inner peripheral surface, and a plastically deformed portion engageable with the inclined surface as a result of crimping is provided in the hub axle.
    Type: Application
    Filed: November 27, 2006
    Publication date: June 18, 2009
    Applicant: NTN CORPORATION
    Inventors: Kazunori Kubota, Kazuo Komori, Hiroshi Matsunaga, Akira Fujimura, Tetsuya Hashimoto, Masahiro Kiuchi
  • Publication number: 20090116779
    Abstract: A vehicle wheel bearing apparatus has an outer member and inner member. The inner member includes a wheel hub and inner ring. The outer member and inner member include respective raceway surfaces. Double row rolling elements are freely rollably contained between the outer and inner raceway surfaces, respectively, of the outer member and the inner member. At least the inner side rolling elements of the double row rolling elements are tapered rollers. A pitch circle diameter of the inner side rolling elements is set smaller than a pitch circle diameter of the outer side rolling elements. A substantially conical recess is formed at an outer side end portion of the wheel hub. The depth of the recess extends near to a shaft shaped portion beyond the bottom of the inner raceway surface of the wheel hub. The thickness of a portion of the wheel hub where the inner raceway surface is formed is set within a predetermined range.
    Type: Application
    Filed: November 25, 2008
    Publication date: May 7, 2009
    Applicant: NTN Corporation
    Inventors: Kazuo Komori, Kazuhiro Baba, Kazunori Kubota
  • Publication number: 20090052823
    Abstract: A vehicle wheel bearing apparatus has an outer member with a body flange and double row outer raceway surfaces. An inner member includes a wheel hub and an inner ring. They include inner raceway surfaces arranged opposite to the double row outer raceway surfaces. Double row rolling elements are freely rollably contained between the outer and inner raceway surfaces. Outer side rolling elements of the double row rolling elements are balls and inner side rolling elements of the double row rolling elements are tapered rollers. A pitch circle diameter of the inner side tapered rollers is set smaller than that of the outer side balls. A substantially conical recess is formed at an outer side end portion of the wheel hub. The depth of the recess extends to at least near the bottom of the inner raceway surface of the wheel hub. The thickness of a portion of the wheel hub where the inner raceway surface is formed is set within a predetermined range.
    Type: Application
    Filed: October 24, 2008
    Publication date: February 26, 2009
    Applicant: NTN Corporation
    Inventors: Kazuo Komori, Kazuhiro Baba, Kazunori Kubota, Takayuki Norimatsu, Akira Fujimura, Shinji Morita
  • Publication number: 20080311471
    Abstract: A method for producing a non-aqueous electrolyte secondary battery comprising the steps of: (i) mixing a positive electrode active material, a first binder A and a dispersion medium to prepare a paste A, the active material comprising a lithium-containing transition metal oxide; (ii) mixing a conductive agent, a second binder B and a dispersion medium to prepare a paste B, the conductive agent comprising carbon black; (iii) mixing the paste A and the paste B to prepare a positive electrode material paste C; (iv) applying the positive electrode material paste C onto a positive electrode core member and rolling and drying the resultant member to prepare a positive electrode; and (v) fabricating a battery using the positive electrode, a negative electrode and a non-aqueous electrolyte, wherein contact angle ?A between the non-aqueous electrolyte and the binder A and contact angle ?B between the non-aqueous electrolyte and the binder B satisfy the formula (1): ?B??A?15°.
    Type: Application
    Filed: January 24, 2008
    Publication date: December 18, 2008
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Kohei Suzuki, Masao Fukunaga, Toshihide Murata, Kazunori Kubota, Tsumoru Ohata
  • Publication number: 20080292965
    Abstract: The present invention relates to a rechargeable lithium ion battery having an electrode plate with a high active material density and high electrolyte permeability. Upon producing the rechargeable lithium ion battery, hollow resin particles that can be collapsed by rolling are incorporated in a positive electrode mixture layer or a negative electrode mixture layer before the electrode mixture layer is rolled. The hollow resin particles are collapsed in the course of rolling the positive electrode mixture layer or the negative electrode mixture layer, so that the active material density can be easily increased. Further, the collapsed resin particles form unevenness on the surface of the electrode plate and also form open pores in the electrode plate, so that electrolyte permeability can be enhanced. As a result, the discharge capacity and rate characteristics of rechargeable lithium ion batteries can be increased.
    Type: Application
    Filed: May 19, 2008
    Publication date: November 27, 2008
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Kazunori KUBOTA, Yasuhiro UEYAMA
  • Publication number: 20080247700
    Abstract: A vehicle wheel bearing apparatus has an outer member (10) formed with double row outer raceway surfaces (10a, 10a) on its inner circumferential surface. An inner member (1) includes a wheel hub (2) with an integrally formed wheel mounting flange (4) at one end and a cylindrical portion (2b) axially extending from the wheel mounting flange (4). An inner ring (3) is press fit onto the cylindrical portion (2b). The inner ring includes one of the double row inner raceway surfaces (2a, 3a) formed on its outer circumferential surface. The double row inner raceway surface (2a) is arranged opposite to one of the double row outer raceway surfaces (10a, 10a). Double row rolling elements (6, 6) are freely rollably retained and held by cages (7, 7) between the double row outer raceway surfaces (10a, 10a) of the outer member (10) and the double row inner raceway surfaces (2a, 3a) of the inner member (1).
    Type: Application
    Filed: August 15, 2005
    Publication date: October 9, 2008
    Applicant: NTN Corporation
    Inventors: Kazuo Komori, Masahiro Kiuchi, Kazunori Kubota, Yasuhiro Aritake, Takayuki Owada
  • Publication number: 20070155634
    Abstract: The present invention provides a grease composition for automobile wheel bearings, which contains (a) an urea thickener represented by general formula (1): R1—NHCONH—R2—NHCONH—R3 (wherein R1 and R3 may be the same or different from each other and are each independently an aromatic hydrocarbon group having 6 to 12 carbon atoms, and R2 represents an aromatic hydrocarbon group having 6 to 15 carbon atoms); (b) an organic molybdenum compound; and (c) a base oil. The composition of the present invention can extend the flaking life and lubrication life, and reduce the fretting wear.
    Type: Application
    Filed: March 2, 2007
    Publication date: July 5, 2007
    Applicants: NTN CORPORATION, KYODO YUSHI CO., LTD.
    Inventors: Kazunori Kubota, Makoto Oishi
  • Patent number: 7150937
    Abstract: A non-aqueous electrolyte battery is provided, which exhibits good high-rate discharge characteristics and low-temperature characteristics and ensures high safety when the negative electrode contains 0.6 to 1.7 parts by weight of a particulate modified styrene-butadiene rubber as a binder and 0.7 to 1.2 parts by weight of a thickening agent so that the total amount of the binder and thickening agent is 1.3 to 2.4 parts by weight per 100 parts by weight of a carbon material as an active material, and the concentration of LiPF6 in the non-aqueous electrolyte is 0.6 to 1.05 mole/liter. The surface area of the active material effectively contributable to charging and discharging reaction is sufficient when the surface area of the carbon material per 1 g of the binder contained in the negative electrode is 300 to 600 m2.
    Type: Grant
    Filed: September 20, 2004
    Date of Patent: December 19, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kohei Suzuki, Kazunori Kubota, Motoi Kawamura, Akira Kuroda, Masao Fukunaga, Tsumoru Ohata
  • Patent number: 7147964
    Abstract: A non-aqueous electrolyte battery is provided, which exhibits good high-rate discharge characteristics and low-temperature characteristics and ensures high safety when the negative electrode contains 0.6 to 1.7 parts by weight of a particulate modified styrene-butadiene rubber as a binder and 0.7 to 1.2 parts by weight of a thickening agent so that the total amount of the binder and thickening agent is 1.3 to 2.4 parts by weight per 100 parts by weight of a carbon material as an active material, and the concentration of LiPF6 in the non-aqueous electrolyte is 0.6 to 1.05 mole/liter. The surface area of the active material effectively contributable to charging and discharging reaction is sufficient when the surface area of the carbon material per 1 g of the binder contained in the negative electrode is 300 to 600 m2.
    Type: Grant
    Filed: July 6, 2004
    Date of Patent: December 12, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kohei Suzuki, Kazunori Kubota, Motoi Kawamura, Akira Kuroda, Masao Fukunaga, Tsumoru Ohata
  • Publication number: 20060274986
    Abstract: To provide a wheel support bearing assembly, in which the sufficient proof strength of an inner race during assemblage onto the vehicle body can be secured without its function being lowered, the wheel support bearing assembly includes an outer member, an inner member, and rows of rolling elements interposed therebetween. The inner member includes an hub axle having a flange and an inner race on an inner race mount, with raceways defined in the hub axle and the inner race. The inner race has a counterbore at its inboard end. The hub axle has a plastically deformed portion which engages an axially oriented surface of the counterbore when radially outwardly crimped and does not protrude outwardly beyond an inboard end face of the inner race. The difference P between the inner race mount and an outer peripheral face of the plastically deformed portion is 0.13 mm or more.
    Type: Application
    Filed: June 1, 2006
    Publication date: December 7, 2006
    Applicant: NTN CORPORATION
    Inventors: Kazuo Komori, Kazunori Kubota, Hiroshi Matsunaga, Akira Fujimura, Tetsuya Hashimoto, Jun Numamoto, Masahiro Kiuchi
  • Publication number: 20050198815
    Abstract: A method for producing a non-aqueous electrolyte secondary battery comprising the steps of: (i) mixing a positive electrode active material, a first binder A and a dispersion medium to prepare a paste A, the active material comprising a lithium-containing transition metal oxide; (ii) mixing a conductive agent, a second binder B and a dispersion medium to prepare a paste B, the conductive agent comprising carbon black; (iii) mixing the paste A and the paste B to prepare a positive electrode material paste C; (iv) applying the positive electrode material paste C onto a positive electrode core member and rolling and drying the resultant member to prepare a positive electrode; and (v) fabricating a battery using the positive electrode, a negative electrode and a non-aqueous electrolyte, wherein contact angle ?A between the non-aqueous electrolyte and the binder A and contact angle ?B between the non-aqueous electrolyte and the binder B satisfy the formula (1): ?B??A?15°.
    Type: Application
    Filed: May 9, 2005
    Publication date: September 15, 2005
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kohei Suzuki, Masao Fukunaga, Toshihide Murata, Kazunori Kubota, Tsumoru Ohata
  • Patent number: 6942946
    Abstract: Disclosed is a positive electrode for a non-aqueous electrolyte secondary battery, comprising: a positive electrode mixture layer; and a positive electrode current collector which carries the positive electrode mixture layer, with the positive electrode mixture layer comprising: at least one positive electrode active material; at least one conductive agent; at least one binder; and at least one thickening agent, and the thickening agent comprising a polymer containing at least one acrylonitrile unit and at least one —(CH2)n— structure portion where 6?n.
    Type: Grant
    Filed: July 23, 2002
    Date of Patent: September 13, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masao Fukunaga, Takao Kuromiya, Kazunori Kubota, Kohei Suzuki, Tsumoru Ohata
  • Patent number: 6869724
    Abstract: A non-aqueous electrolyte secondary battery comprises: a positive electrode sheet comprising a positive electrode mixture containing a lithium-containing transition metal oxide as an active material and a particulate binder; a negative electrode sheet comprising a negative electrode mixture containing a carbon material; a separator interposed between the positive electrode sheet and the negative electrode sheet; and a non-aqueous electrolyte containing a lithium salt, wherein the positive electrode sheet and the negative electrode sheet are wound with the separator interposed therebetween to form an electrode assembly, and the positive electrode mixture has an active material density of 3.0 to 4.0 g/ml. The battery has a long life, high energy density and high output.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: March 22, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kohei Suzuki, Kazunori Kubota, Akira Kuroda, Motoi Kawamura, Masao Fukunaga, Tsumoru Ohata
  • Publication number: 20050031955
    Abstract: A non-aqueous electrolyte battery is provided, which exhibits good high-rate discharge characteristics and low-temperature characteristics and ensures high safety when the negative electrode contains 0.6 to 1.7 parts by weight of a particulate modified styrene-butadiene rubber as a binder and 0.7 to 1.2 parts by weight of a thickening agent so that the total amount of the binder and thickening agent is 1.3 to 2.4 parts by weight per 100 parts by weight of a carbon material as an active material, and the concentration of LiPF6 in the non-aqueous electrolyte is 0.6 to 1.05 mole/liter. The surface area of the active material effectively contributable to charging and discharging reaction is sufficient when the surface area of the carbon material per 1 g of the binder contained in the negative electrode is 300 to 600 m2.
    Type: Application
    Filed: September 20, 2004
    Publication date: February 10, 2005
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD
    Inventors: Kohei Suzuki, Kazunori Kubota, Motoi Kawamura, Akira Kuroda, Masao Fukunaga, Tsumoru Ohata
  • Publication number: 20040253513
    Abstract: A non-aqueous electrolyte battery is provided, which exhibits good high-rate discharge characteristics and low-temperature characteristics and ensures high safety when the negative electrode contains 0.6 to 1.7 parts by weight of a particulate modified styrene-butadiene rubber as a binder and 0.7 to 1.2 parts by weight of a thickening agent so that the total amount of the binder and thickening agent is 1.3 to 2.4 parts by weight per 100 parts by weight of a carbon material as an active material, and the concentration of LiPF6 in the non-aqueous electrolyte is 0.6 to 1.05 mole/liter. The surface area of the active material effectively contributable to charging and discharging reaction is sufficient when the surface area of the carbon material per 1 g of the binder contained in the negative electrode is 300 to 600 m2.
    Type: Application
    Filed: July 6, 2004
    Publication date: December 16, 2004
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD
    Inventors: Kohei Suzuki, Kazunori Kubota, Motoi Kawamura, Akira Kuroda, Masao Fukunaga, Tsumoru Ohata
  • Patent number: 6773838
    Abstract: A non-aqueous electrolyte battery is provided, which exhibits good high-rate discharge characteristics and low-temperature characteristics and ensures high safety when the negative electrode contains 0.6 to 1.7 parts by weight of a particulate modified styrene-butadiene rubber as a binder and 0.7 to 1.2 parts by weight of a thickening agent so that the total amount of the binder and thickening agent is 1.3 to 2.4 parts by weight per 100 parts by weight of a carbon material as an active material, and the concentration of LiPF6 in the non-aqueous electrolyte is 0.6 to 1.05 mole/liter. The surface area of the active material effectively contributable to charging and discharging reaction is sufficient when the surface area of the carbon material per 1 g of the binder contained in the negative electrode is 300 to 600 m2.
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: August 10, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kohei Suzuki, Kazunori Kubota, Motoi Kawamura, Akira Kuroda, Masao Fukunaga, Tsumoru Ohata
  • Publication number: 20030068551
    Abstract: Disclosed is a positive electrode for a non-aqueous electrolyte secondary battery, comprising: a positive electrode mixture layer; and a positive electrode current collector which carries the positive electrode mixture layer, with the positive electrode mixture layer comprising: at least one positive electrode active material; at least one conductive agent; at least one binder; and at least one thickening agent, and the thickening agent comprising a polymer containing at least one acrylonitrile unit and at least one —(CH2)n— structure portion where 6≦n.
    Type: Application
    Filed: July 23, 2002
    Publication date: April 10, 2003
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masao Fukunaga, Takao Kuromiya, Kazunori Kubota, Kohei Suzuki, Tsumoru Ohata
  • Publication number: 20030054243
    Abstract: A method for producing a non-aqueous electrolyte secondary battery comprising the steps of: (i) mixing a positive electrode active material, a first binder A and a dispersion medium to prepare a paste A, the active material comprising a lithium-containing transition metal oxide; (ii) mixing a conductive agent, a second binder B and a dispersion medium to prepare a paste B, the conductive agent comprising carbon black; (iii) mixing the paste A and the paste B to prepare a positive electrode material paste C; (iv) applying the positive electrode material paste C onto a positive electrode core member and rolling and drying the resultant member to prepare a positive electrode; and (v) fabricating a battery using the positive electrode, a negative electrode and a non-aqueous electrolyte, wherein contact angle &thgr;A between the non-aqueous electrolyte and the binder A and contact angle &thgr;B between the non-aqueous electrolyte and the binder B satisfy the formula (1): &thgr;B−&thgr;A≧15°.
    Type: Application
    Filed: August 30, 2002
    Publication date: March 20, 2003
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kohei Suzuki, Masao Fukunaga, Toshihide Murata, Kazunori Kubota, Tsumoru Ohata
  • Publication number: 20020061440
    Abstract: A non-aqueous electrolyte battery is provided, which exhibits good high-rate discharge characteristics and low-temperature characteristics and ensures high safety when the negative electrode contains 0.6 to 1.7 parts by weight of a particulate modified styrene-butadiene rubber as a binder and 0.7 to 1.2 parts by weight of a thickening agent so that the total amount of the binder and thickening agent is 1.3 to 2.4 parts by weight per 100 parts by weight of a carbon material as an active material, and the concentration of LiPF6 in the non-aqueous electrolyte is 0.6 to 1.05 mole/liter. The surface area of the active material effectively contributable to charging and discharging reaction is sufficient when the surface area of the carbon material per 1 g of the binder contained in the negative electrode is 300 to 600 m2.
    Type: Application
    Filed: May 1, 2001
    Publication date: May 23, 2002
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kohei Suzuki, Kazunori Kubota, Motoi Kawamura, Akira Kuroda, Masao Fukunaga, Tsumoru Ohata
  • Publication number: 20020037450
    Abstract: A non-aqueous electrolyte secondary battery comprises: a positive electrode sheet comprising a positive electrode mixture containing a lithium-containing transition metal oxide as an active material and a particulate binder; a negative electrode sheet comprising a negative electrode mixture containing a carbon material; a separator interposed between the positive electrode sheet and the negative electrode sheet; and a non-aqueous electrolyte containing a lithium salt, wherein the positive electrode sheet and the negative electrode sheet are wound with the separator interposed therebetween to form an electrode assembly, and the positive electrode mixture has an active material density of 3.0 to 4.0 g/ml. The battery has a long life, high energy density and high output.
    Type: Application
    Filed: July 26, 2001
    Publication date: March 28, 2002
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kohei Suzuki, Kazunori Kubota, Akira Kuroda, Motoi Kawamura, Masao Fukunaga, Tsumoru Ohata