Patents by Inventor Takashi Nakamaru

Takashi Nakamaru 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: 20110148064
    Abstract: A multilayered sliding member 51 includes: a backing plate 52 formed of a steel plate; a porous metal sintered layer 53 formed integrally on the surface of the backing plate 52; and a sliding layer 54 constituted of a synthetic resin composition filling pores of, and coating the surface of, the porous metal sintered layer 53, the synthetic resin composition being composed of 5 to 30% by weight of a barium sulfate, 1 to 15% by weight of a magnesium silicate, 1 to 25% by weight of a phosphate, 0.5 to 3% by weight of a titanium oxide, and the balance of a polytetrafluoroethylene resin.
    Type: Application
    Filed: August 26, 2009
    Publication date: June 23, 2011
    Inventors: Sumihide Yanase, Takashi Nakamaru, Tadashi Watai, Satoshi Takamura, Eiichi Yamashita
  • Patent number: 7361395
    Abstract: A synchronizer ring 1 has an annular ring body 2; a friction material 4 joined integrally to a cylindrical inner peripheral surface 3 of the ring body 2; a conical surface 5 formed on an inner surface of the friction material 4; and a plurality of annular grooves 6 formed in the conical surface 5 of the friction material 4.
    Type: Grant
    Filed: June 7, 2004
    Date of Patent: April 22, 2008
    Assignees: Oiles Corporation, Chuetsu Metal Works Co., Ltd.
    Inventors: Takashi Nakamaru, Satoshi Takamura, Kunio Nakashima, Wataru Yago, Kenichi Ichida, Atsushi Yasukawa, Shigeyuki Aburatani
  • Publication number: 20070021544
    Abstract: There are provided a lead-free resin composition for sliding member which is capable of exhibiting friction and wear characteristics identical to or more excellent than those of lead-containing resin compositions for sliding member even under various different use conditions such as dry frictional condition, in-oil or oil-lubricating condition and grease-lubricating condition, as well as a sliding member using the resin composition. The resin composition for sliding member comprises 5 to 30% by weight of barium sulfate, 1 to 15% by weight of magnesium silicate, 1 to 25% by weight of a phosphate, and the balance of a tetrafluoroethylene resin.
    Type: Application
    Filed: July 8, 2004
    Publication date: January 25, 2007
    Applicant: OILES CORPORATION
    Inventors: Sumihide Yanase, Takashi Nakamaru, Eiichi Yamashita, Satoshi Takamura
  • Publication number: 20060121235
    Abstract: A synchronizer ring 1 has an annular ring body 2; a friction material 4 joined integrally to a cylindrical inner peripheral surface 3 of the ring body 2; a conical surface 5 formed on an inner surface of the friction material 4; and a plurality of annular grooves 6 formed in the conical surface 5 of the friction material 4.
    Type: Application
    Filed: June 7, 2004
    Publication date: June 8, 2006
    Inventors: Takashi Nakamaru, Satoshi Takamura, Kunio Nakashima, Wataru Yago, Kenichi Ichida, Atsushi Yasukawa, Shigeyuki Aburatani
  • Patent number: 6548188
    Abstract: A resin composition for a sliding member of the present invention comprises 5 to 40% by weight of barium sulfate; 1 to 30% by weight of a phosphate; 1 to 10% by weight of at least one selected from the group consisting of a polyimide resin, a phenol resin-calcined product and a polyphenylene sulfone resin; and the balance of a polytetrafluoroethylene resin, and a sliding member produced from the resin composition. Such a resin composition suitable for producing a sliding member capable of exhibiting a stable low friction coefficient and an extremely low wear amount under dry frictional condition, or under oil-immersed or oil-lubricated condition.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: April 15, 2003
    Assignee: Oiles Corporation
    Inventors: Sumihide Yanase, Takashi Nakamaru
  • Patent number: 6467961
    Abstract: A lubricating coating compound used for forming a thermosetting synthetic resin lubricating film, wherein a resin composition composed of an epoxy resin, a curing agent, a reactive silicone oil with an epoxy group, and a triazinethiol is dissolved in an organic solvent, wherein if the sum of the epoxy resin and the curing agent is set to 100 parts by weight, the sum of the reactive silicone oil with an epoxy group and the triazinethiol is 2 to 30 parts by weight.
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: October 22, 2002
    Assignee: Oiles Corporation
    Inventors: Takashi Nakamaru, Yoshiaki Yamamoto, Namiko Kaneko
  • Publication number: 20010039305
    Abstract: A lubricating coating compound used for forming a thermosetting synthetic resin lubricating film, wherein a resin composition composed of an epoxy resin, a curing agent, a reactive silicone oil with an epoxy group, and a triazinethiol is dissolved in an organic solvent, wherein if the sum of the epoxy resin and the curing agent is set to 100 parts by weight, the sum of the reactive silicone oil with an epoxy group and the triazinethiol is 2 to 30 parts by weight.
    Type: Application
    Filed: April 13, 2001
    Publication date: November 8, 2001
    Applicant: Oiles Corporation.
    Inventors: Takashi Nakamaru, Yoshiaki Yamamoto, Namiko Kaneko
  • Patent number: 6245836
    Abstract: A lubricating coating compound used for forming a thermosetting synthetic resin lubricating film, wherein a resin composition composed of an epoxy resin, a curing agent, a reactive silicone oil with an epoxy group, and a triazinethiol is dissolved in an organic solvent, wherein if the sum of the epoxy resin and the curing agent is set to 100 parts by weight, the sum of the reactive silicone oil with an epoxy group and the triazinethiol is 2 to 30 parts by weight.
    Type: Grant
    Filed: March 4, 1999
    Date of Patent: June 12, 2001
    Assignee: Oiles Corporation
    Inventors: Takashi Nakamaru, Yoshiaki Yamamoto, Namiko Kaneko
  • Patent number: 5732322
    Abstract: The disclosure describes a resin composition for a sliding member, comprising 1 to 25 wt % of component A selected from the group consisting of phosphates and barium sulfate, 1 to 15 wt % of component B selected from the group consisting of magnesium silicate and mica, and 5 to 50 wt % of component C selected from the group consisting of lead, tin, lead-tin alloy and mixtures thereof, the balance of polytetrafluoroethylene.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: March 24, 1998
    Assignee: Oiles Corporation
    Inventors: Takashi Nakamaru, Sumihide Yanase, Akihiko Okimura
  • Patent number: 5624887
    Abstract: Multilayered sliding members made of a lubricating composition containing polytetrafluoroethylene and 1 to 40 wt % of zinc oxide whiskers as a filler; and a porous sintered metal layer formed on a steel backing are disclosed, in which the lubricating composition is impregnated in and coated on the porous sintered metal layer.
    Type: Grant
    Filed: January 30, 1995
    Date of Patent: April 29, 1997
    Assignee: Oiles Corporation
    Inventors: Takashi Nakamaru, Tadashi Watai, Akihiko Okimura, Sumihide Yanase
  • Patent number: 5616406
    Abstract: The disclosure describes sliding member comprising a metal mesh and a resin composition is filled and covered in the mesh and on the surface of the metal mesh, wherein the resin composition comprises 5 to 30% by weight of at least one reinforcing filler selected from the group consisting of glass fibers and wollastonite, 1 to 15% by weight of at least one phosphate selected from the group consisting of calcium pyrophosphate and calcium hydrogen phosphate, 1 to 20% by weight of barium sulfate and the balance of polytetrafluoroethylene,the total content of the reinforcing filler, phosphate and barium sulfate being not more than 60% by weight.
    Type: Grant
    Filed: August 18, 1995
    Date of Patent: April 1, 1997
    Assignee: Oiles Corporation
    Inventors: Takashi Nakamaru, Sumihide Yanase, Akihiko Okimura
  • Patent number: 5433870
    Abstract: Disclosed herein is a multilayered sliding member comprising a lubricating composition comprising polytetrafluoroethylene and 1 to 40 wt % of (i) zinc oxide whiskers or (ii) zinc oxide whiskers and fibrous magnesium oxysulfate, fan-shaped magnesium oxysulfate or a mixture thereof used as a filler; and a porous sintered metal layer formed on a steel backing,the lubricating composition being impregnated in and coated on the porous sintered metal layer formed on a steel backing.
    Type: Grant
    Filed: September 23, 1993
    Date of Patent: July 18, 1995
    Assignee: Oiles Corporation
    Inventors: Takashi Nakamaru, Tadashi Watai, Akihiko Okimura, Sumihide Yanase
  • Patent number: 5354622
    Abstract: Disclosed herein is a multilayered sliding member comprising a lubricating composition comprising polytetrafluoroethylene and, as filler, 1-25 wt % of fibrous magnesium oxysulfate, fan-shaped magnesium oxysulfate or a mixture thereof, and a porous sintered metal layer formed on a steel backing,the lubrication composition being impregnated in and coated on a porous sintered metal layer formed on the steel backing.
    Type: Grant
    Filed: July 28, 1993
    Date of Patent: October 11, 1994
    Assignee: Oiles Corporation
    Inventors: Takashi Nakamaru, Tadashi Watai, Akihiko Okimura, Sumihide Yanase
  • Patent number: 5300366
    Abstract: Disclosed herein are a fluororesin composition for a sliding member comprising a fluororesin, at least one of fillers selected from the group consisting of glass fiber, glass powder, carbon fiber and carbon powder, and a phosphate, and a sliding member thereof.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: April 5, 1994
    Assignee: Oiles Corporation
    Inventors: Takashi Nakamaru, Tadashi Watai, Masayuki Rokugawa, Kouichi Tsunoda, Tadayoshi Umeki, Takayuki Miyaji, Kenji Yamada