Patents by Inventor Masaaki Yamashita

Masaaki Yamashita 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: 7573008
    Abstract: A PTC element comprising a PTC element body containing a polymer matrix and conductive particles, a pair of electrodes in contact with the PTC element body, and a protective layer composed of a cured epoxy resin composition containing an epoxy resin and a thiol-based curing agent, and covering the PTC element body so as to seal the PTC element body.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: August 11, 2009
    Assignee: TDK Corporation
    Inventors: Masaaki Yamashita, Yasuhide Yamashita, Tsuyoshi Sugiyama, Hisanao Tosaka
  • Publication number: 20090085714
    Abstract: A thermistor is provided that is capable of sufficiently protecting a thermistor element without increasing the thickness of the element and that prevents separation of the sealed section during installation and shipment. A thermistor 10 includes a thermistor layer 2 composed of conductive particles dispersed in a matrix resin; paired electrodes 1 facing each other and sandwiching the thermistor layer 2, the peripheries of the paired electrodes 1 protruding from the thermistor layer 2 in the planar direction; and a sealing resin 3 surrounding the thermistor layer 2 within an area where the paired electrodes 1 overlap with each other.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 2, 2009
    Applicant: TDK CORPORATION
    Inventor: Masaaki YAMASHITA
  • Publication number: 20090077958
    Abstract: A hydraulic circuit structure of a work vehicle capable of solving a problem in a conventional structure wherein, in a machine attitude control in back hoe operation, pressure oil is preferentially fed to light-loaded machines and some work machines are slowly moved or stopped and, accordingly, the attitudes of the machines cannot be rapidly controlled and work performance is affected. To solve this problem, the hydraulic circuit of the work vehicle comprises two valve groups for loader and back hoe having circuits to supply the pressure oil from one hydraulic pump P1 to a valve group 150 for back hoe control through a valve group 130 for loader control and the pressure oil from the other hydraulic pump P2 directly to the valve group 150 for back hoe control. The pressure oil is independently supplied from the hydraulic pumps P1 and P2 to valve sections 152 for controlling right and left stabilizer cylinders installed in the valve group 150 for back hoe control.
    Type: Application
    Filed: January 23, 2006
    Publication date: March 26, 2009
    Inventor: Masaaki Yamashita
  • Publication number: 20080250917
    Abstract: An object of the invention is to propose a hydraulic lift structure which prevents a malfunction of a hydraulic cylinder or the like and improves a supplying and discharging efficiency of a working fluid. In a hydraulic lift structure formed by arranging a hydraulic cylinder case internally provided with a hydraulic cylinder for moving up and down a working machine (a rotary power tiller) in an upper portion of a transmission case of a working vehicle, an oil reservoir of a working fluid for the hydraulic cylinder is provided in a boundary portion between the transmission case and the hydraulic cylinder case in such a manner as to be isolated from an inner portion of the transmission case.
    Type: Application
    Filed: September 14, 2004
    Publication date: October 16, 2008
    Applicant: Yanmar Co., Ltd.
    Inventor: Masaaki Yamashita
  • Publication number: 20080149228
    Abstract: A method for producing a hot-dip galvanized steel sheet which includes a hot-dip galvanization step, a temper rolling step and an oxidation step.
    Type: Application
    Filed: January 8, 2008
    Publication date: June 26, 2008
    Applicant: JFE STEEL CORPORATION
    Inventors: Shoichiro Taira, Masaki Tada, Yoshiharu Sugimoto, Masayasu Nagoshi, Takashi Kawano, Etsuo Hamada, Satoru Ando, Shinji Ootsuka, Masaaki Yamashita
  • Patent number: 7357386
    Abstract: A paper feed apparatus of the present invention includes a pick mechanism for successively taking out, by use of a pick roller 1, a plurality of sheets of paper stacked on a chute from the bottom side thereof, leading ends of the sheets being aligned by means of a stopper block 2 in a state in which the sheets are stacked on the chute. Moreover, the apparatus includes a roller guide 11 and an abutment guide 12. When the roller guide 11 is raised to a paper setting position in a direction away from the pick roller 1, the roller guide 11 raises the leading ends of the sheets stacked on the chute to thereby prevent contact between the sheets and the pick roller 1. The abutment guide 12 aligns the leading ends of the sheets when the roller guide 11 is raised.
    Type: Grant
    Filed: March 9, 2004
    Date of Patent: April 15, 2008
    Assignee: PFU Limited
    Inventors: Mitsuhiro Shikan, Masaaki Yamashita, Takumi Nakayama, Satoshi Ishida
  • Patent number: 7338718
    Abstract: A hot-dip galvanized steel sheet includes a plating layer substantially composed of the ? phase and an oxide layer disposed on a surface of the plating layer. The oxide layer has an average thickness of 10 nm or more and includes a Zn-based oxide layer and an Al-based oxide layer. A method for producing the hot-dip galvanized steel sheet includes a hot-dip galvanization step, a temper rolling step, and an oxidation step.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: March 4, 2008
    Assignee: JFE Steel Corporation
    Inventors: Shoichiro Taira, Masaki Tada, Yoshiharu Sugimoto, Masayasu Nagoshi, Takashi Kawano, Etsuo Hamada, Satoru Ando, Shinji Ootsuka, Masaaki Yamashita
  • Patent number: 7291402
    Abstract: The invention is to provide a surface-treated steel sheet of good white rust resistance with no chromium in its surface treatment film, and it has realized a surface-treated steel sheet of higher-level corrosion resistance by forming a reaction layer of plating metal with a barrier layer effective for anticorrosion not in a two-layered film but in a single-layered film.
    Type: Grant
    Filed: February 14, 2003
    Date of Patent: November 6, 2007
    Assignees: JFE Steel Corporation, Kansai Paint Co., Ltd.
    Inventors: Okai Kazuhisa, Akira Matsuzaki, Naoto Yoshimi, Takahiro Kubota, Masaaki Yamashita, Hisato Noro, Haruo Nakamichi, Kaoru Sato, Hiroyasu Matsuki, Reijiro Nishida, Masahiro Murata, Shoichi Tanaka, Yoshikazu Morohoshi, Shingo Amaki
  • Patent number: 7273653
    Abstract: A resin film of a two-layer-construction comprising: (a) a resin layer R1 including a non-stretched resin film which contains a thermoplastic polyester resin containing 3 to 30 percent by weight in a weight fraction in the entire resin of a granular resin with a grain diameter of 0.1 to 5 ?m, the granular resin being a modified polyolefin resin containing 2 to 20 percent by weight of a functional group derived from carboxylic acid in terms of carboxylic acid, and (b) a polyester resin layer R0 containing at least one of polyethylene terephthalate and isophthalic acid copolymerized polyethylene terephthalate, as a basic skeleton, wherein the resin layer R1 and the resin layer R2 are laminated to each other.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: September 25, 2007
    Assignee: JFE Steel Corporation
    Inventors: Yasuhide Yoshida, Hiroki Iwasa, Hiroshi Kubo, Takeshi Suzuki, Akihiro Furuta, Keiji Sugawara, Masaaki Yamashita
  • Publication number: 20070151968
    Abstract: A PTC element comprising a PTC element body containing a polymer matrix and conductive particles, a pair of electrodes in contact with the PTC element body, and a protective layer composed of a cured epoxy resin composition containing an epoxy resin and a thiol-based curing agent, and covering the PTC element body so as to seal the PTC element body.
    Type: Application
    Filed: December 22, 2006
    Publication date: July 5, 2007
    Applicant: TDK CORPORATION
    Inventors: Masaaki Yamashita, Yasuhide Yamashita, Tsuyoshi Sugiyama, Hisanao Tosaka
  • Patent number: 7128518
    Abstract: A lift arm (9) includes a first arm (11) and a second arm (12). A pivot joint portion (32) where the first arm (11) is pivoted on a bracket (8) stood at a vehicle side portion substantially corresponds to the rear end of an operation control portion. A rod (15) as a swing motion-limiting member is interposed between the bracket (8) and the second arm (12). An angle of bend formed by the first arm (11) and the second arm (12) is set to be large at a lowered position of the lift arm and small at a lifted position.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: October 31, 2006
    Assignee: Yanmar Co., Ltd.
    Inventor: Masaaki Yamashita
  • Publication number: 20060182988
    Abstract: The present invention provides a surface treated steel sheet including a steel sheet; a plating layer containing at least one metal selected from the group consisting of zinc and aluminum on a surface of the steel sheet; and a film on the plating layer, the film containing at least one metal selected from the group consisting of Al, Mg, and Zn, a tetravalent vanadium compound, and a phosphoric acid group. This surface treated steel sheet exhibits excellent corrosion resistance and excellent surface appearance without containing hazardous substances, such as hexavalent chromium, in the film.
    Type: Application
    Filed: July 28, 2004
    Publication date: August 17, 2006
    Inventors: Takafumi Yamaji, Akira Matsuzaki, Kazuhisa Okai, Keiji Yoshida, Masaaki Yamashita, Yuichi Fukeshima, Toshiyuki Okuma
  • Patent number: 7063889
    Abstract: [Problem] The object is to provide a resin film for metal sheet laminate which endures severe forming owing to excellent formability and impact resistance, and also to excellent adhesion after forming and heating, further gives stable performance independent of forming conditions, and also provides a laminated metal sheet, and a method for manufacturing the same. [Means for Resolution] The resin film for metal sheet laminate has a mixed resin in which a granular resin mainly existing in a state of grains having 0.1 to 5 ?m in diameter is dispersed in a polyester resin having a main basic skeleton of polyethylene terephthalate and/or isophthalic acid copolymerized polyethylene terephthalate, in a range from 3 to 30% by weight in entire resin. The granular resin is a modified polyolefin resin containing a functional group derived from carboxylic acid in a range from 2 to 20% by weight as carboxylic acid.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: June 20, 2006
    Assignee: JFE Steel Corporation
    Inventors: Yasuhide Yoshida, Hiroki Iwasa, Hiroshi Kubo, Takeshi Suzuki, Akihiko Furuta, Keiji Sugawara, Masaaki Yamashita
  • Publication number: 20060097441
    Abstract: A paper feed apparatus of the present invention includes a pick mechanism for successively taking out, by use of a pick roller 1, a plurality of sheets of paper stacked on a chute from the bottom side thereof, leading ends of the sheets being aligned by means of a stopper block 2 in a state in which the sheets are stacked on the chute. Moreover, the apparatus includes a roller guide 11 and an abutment guide 12. When the roller guide 11 is raised to a paper setting position in a direction away from the pick roller 1, the roller guide 11 raises the leading ends of the sheets stacked on the chute to thereby prevent contact between the sheets and the pick roller 1. The abutment guide 12 aligns the leading ends of the sheets when the roller guide 11 is raised.
    Type: Application
    Filed: March 9, 2004
    Publication date: May 11, 2006
    Inventors: Mitsuhiro Shikan, Masaaki Yamashita, Takumi Nakayama, Satoshi Ishida
  • Publication number: 20060083908
    Abstract: A resin film of a two-layer-construction comprising: (a) a resin layer R1 including a non-stretched resin film which contains a thermoplastic polyester resin containing 3 to 30 percent by weight in a weight fraction in the entire resin of a granular resin with a grain diameter of 0.1 to 5 ?m, the granular resin being a modified polyolefin resin containing 2 to 20 percent by weight of a functional group derived from carboxylic acid in terms of carboxylic acid, and (b) a polyester resin layer R0 containing at least one of polyethylene terephthalate and isophthalic acid copolymerized polyethylene terephthalate, as a basic skeleton, wherein the resin layer R1 and the resin layer R2 are laminated to each other.
    Type: Application
    Filed: November 18, 2005
    Publication date: April 20, 2006
    Applicant: JFE STEEL CORPORATION
    Inventors: Yasuhide Yoshida, Hiroki Iwasa, Hiroshi Kubo, Takeshi Suzuki, Akihiko Furuta, Keiji Sugawara, Masaaki Yamashita
  • Publication number: 20050196262
    Abstract: A lift arm (9) includes a first arm (11) and a second arm (12). A pivot joint portion (32) where the first arm (11) is pivoted on a bracket (8) stood at a vehicle side portion substantially corresponds to the rear end of an operation control portion. A rod (15) as a swing motion-limiting member is interposed between the bracket (8) and the second arm (12). An angle of bend formed by the first arm (11) and the second arm (12) is set to be large at a lowered position of the lift arm and small at a lifted position.
    Type: Application
    Filed: April 11, 2005
    Publication date: September 8, 2005
    Inventor: Masaaki Yamashita
  • Publication number: 20050191483
    Abstract: [Problem] The object is to provide a resin film for metal sheet laminate which endures severe forming owing to excellent formability and impact resistance, and also to excellent adhesion after forming and heating, further gives stable performance independent of forming conditions, and also provides a laminated metal sheet, and a method for manufacturing the same. [Means for Resolution] The resin film for metal sheet laminate has a mixed resin in which a granular resin mainly existing in a state of grains having 0.1 to 5 ?m in diameter is dispersed in a polyester resin having a main basic skeleton of polyethylene terephthalate and/or isophthalic acid copolymerized polyethylene terephthalate, in a range from 3 to 30% by weight in entire resin. The granular resin is a modified polyolefin resin containing a functional group derived from carboxylic acid in a range from 2 to 20% by weight as carboxylic acid.
    Type: Application
    Filed: September 18, 2003
    Publication date: September 1, 2005
    Applicant: JFE STEEL CORPORATION
    Inventors: Yasuhide Yoshida, Hiroki Iwasa, Hiroshi Kubo, Takeshi Suzuki, Akihiko Furuta, Keiji Sugawara, Masaaki Yamashita
  • Publication number: 20050147832
    Abstract: The invention is to provide a surface-treated steel sheet of good white rust resistance with no chromium in its surface treatment film, and it has realized a surface-treated steel sheet of higher-level corrosion resistance by forming a reaction layer of plating metal with a barrier layer effective for anticorrosion not in a two-layered film but in a single-layered film.
    Type: Application
    Filed: February 14, 2003
    Publication date: July 7, 2005
    Inventors: Kazuhisa Okai, Akira Matsuzaki, Naoto Yoshimi, Takahiro Kubota, Masaaki Yamashita, Hisato Noro, Haruo Nakamichi, Kaoru Sato, Hiroyasu Matsuki, Reijiro Nishida, Masahiro Murata, Shoichi Tanaka, Yoshikazu Morohoshi, Shingo Amaki
  • Patent number: D523027
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: June 13, 2006
    Assignee: Yanmar Co. Ltd.
    Inventors: Masaaki Yamashita, Kunihiko Sakamoto, Hiroaki Ayabe, Seiji Sakada, Makiko Tajima
  • Patent number: D529932
    Type: Grant
    Filed: December 9, 2004
    Date of Patent: October 10, 2006
    Assignee: Yanmar Co., LTD
    Inventors: Masaaki Yamashita, Kunihiko Sakamoto, Hiroaki Ayabe, Seiji Sakada, Makiko Tajima