Patents by Inventor Tadashi Watai

Tadashi Watai 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: 9062708
    Abstract: A thrust sliding bearing 1 includes a synthetic resin-made upper casing 100, a synthetic resin-made lower casing 200, and a synthetic resin-made thrust sliding bearing piece 300 interposed between the upper and lower casings 100 and 200, and the thrust sliding bearing piece 300 has inner recessed portions 306 and outer recessed portions 307 which are formed on its upper surface 304 in two rows including an inner row and an outer row and a lubricating oil filled in each of these inner recessed portions 306 and outer recessed portions 307, the inner recessed portions 306 and the outer recessed portions 307 being arranged with a phase difference of an angle ?1=6°.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: June 23, 2015
    Assignee: OILES CORPORATION
    Inventors: Kouichi Morishige, Katsunori Saito, Tadashi Watai
  • Publication number: 20140119682
    Abstract: A thrust sliding bearing 1 includes a synthetic resin-made upper casing 100, a synthetic resin-made lower casing 200, and a synthetic resin-made thrust sliding bearing piece 300 interposed between the upper and lower casings 100 and 200, and the thrust sliding bearing piece 300 has inner recessed portions 306 and outer recessed portions 307 which are formed on its upper surface 304 in two rows including an inner row and an outer row and a lubricating oil filled in each of these inner recessed portions 306 and outer recessed portions 307, the inner recessed portions 306 and the outer recessed portions 307 being arranged with a phase difference of an angle ?1=6°.
    Type: Application
    Filed: May 30, 2012
    Publication date: May 1, 2014
    Applicant: OILES CORPORATION
    Inventors: Kouichi Morishige, Katsunori Saito, Tadashi Watai
  • Patent number: 7993061
    Abstract: A sliding bearing (1) includes an upper casing (3) which is made of polyacetal resin as a synthetic resin, has an annular surface (2), and serves as a first bearing body; a second bearing body (5) which is made of a synthetic resin, is superposed on the upper casing (3) so as to be rotatable about an axis (O), and has an synthetic resin-made annular surface (4) opposed to the annular surface (2); and a synthetic resin-made annular sheet (6) which is interposed between the annular surfaces (2) and (4) and slidably abuts against at least one of the upper casing (3) and the bearing body (5).
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: August 9, 2011
    Assignee: Oiles Corporation
    Inventors: Tadashi Watai, Kazuyuki Miyata, Ryohei Kaneko
  • 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
  • Publication number: 20080310780
    Abstract: A sliding bearing (1) includes an upper casing (3) which is made of polyacetal resin as a synthetic resin, has an annular surface (2), and serves as a first bearing body; a second bearing body (5) which is made of a synthetic resin, is superposed on the upper casing (3) so as to be rotatable about an axis (O), and has an synthetic resin-made annular surface (4) opposed to the annular surface (2); and a synthetic resin-made annular sheet (6) which is interposed between the annular surfaces (2) and (4) and slidably abuts against at least one of the upper casing (3) and the bearing body (5).
    Type: Application
    Filed: June 30, 2008
    Publication date: December 18, 2008
    Applicant: OILES CORPORATION
    Inventors: Tadashi Watai, Kazuyuki Miyata, Ryohei Kaneko
  • Patent number: 7407329
    Abstract: A sliding bearing (1) includes an upper casing (3) which is made of polyacetal resin as a synthetic resin, has an annular surface (2), and serves as a first bearing body; a second bearing body (5) which is made of a synthetic resin, is superposed on the upper casing (3) so as to be rotatable about an axis (O), and has an synthetic resin-made annular surface (4) opposed to the annular surface (2); and a synthetic resin-made annular sheet (6) which is interposed between the annular surfaces (2) and (4) and slidably abuts against at least one of the upper casing (3) and the bearing body (5).
    Type: Grant
    Filed: June 7, 2007
    Date of Patent: August 5, 2008
    Assignee: Oiles Corporation
    Inventors: Tadashi Watai, Kazuyuki Miyata, Ryohei Kaneko
  • Patent number: 7357578
    Abstract: A thrust sliding bearing includes an upper casing having a polyacetal resin-made flat annular surface and a lower casing superposed on the upper casing so as to be rotatable about an axis of the upper casing and having a polyacetal resin-made annular surface opposing the annular surface of the upper casing.
    Type: Grant
    Filed: January 12, 2007
    Date of Patent: April 15, 2008
    Assignee: Oiles Corporation
    Inventors: Tadashi Watai, Kazuyuki Miyata, Atsushi Ueno, Ryohei Kaneko
  • Patent number: 7293918
    Abstract: A sliding bearing (1) includes an upper casing (3) which is made of polyacetal resin as a synthetic resin, has an annular surface (2), and serves as a first bearing body; a second bearing body (5) which is made of a synthetic resin, is superposed on the upper casing (3) so as to be rotatable about an axis (O), and has an synthetic resin-made annular surface (4) opposed to the annular surface (2); and a synthetic resin-made annular sheet (6) which is interposed between the annular surfaces (2) and (4) and slidably abuts against at least one of the upper casing (3) and the bearing body (5).
    Type: Grant
    Filed: January 20, 2003
    Date of Patent: November 13, 2007
    Assignee: Oiles Corporation
    Inventors: Tadashi Watai, Kazuyuki Miyata, Ryohei Kaneko
  • Publication number: 20070237439
    Abstract: A sliding bearing (1) includes an upper casing (3) which is made of polyacetal resin as a synthetic resin, has an annular surface (2), and serves as a first bearing body; a second bearing body (5) which is made of a synthetic resin, is superposed on the upper casing (3) so as to be rotatable about an axis (0), and has an synthetic resin-made annular surface (4) opposed to the annular surface (2); and a synthetic resin-made annular sheet (6) which is interposed between the annular surfaces (2) and (4) and slidably abuts against at least one of the upper casing (3) and the bearing body (5).
    Type: Application
    Filed: June 7, 2007
    Publication date: October 11, 2007
    Applicant: OILES CORPORATION
    Inventors: Tadashi Watai, Kazuyuki Miyata, Ryohei Kaneko
  • Publication number: 20070116391
    Abstract: A thrust sliding bearing includes an upper casing having a polyacetal resin-made flat annular surface and a lower casing superposed on the upper casing so as to be rotatable about an axis of the upper casing and having a polyacetal resin-made annular surface opposing the annular surface of the upper casing.
    Type: Application
    Filed: January 12, 2007
    Publication date: May 24, 2007
    Applicant: OILES CORPORATION
    Inventors: Tadashi Watai, Kazuyuki Miyata, Atsushi Ueno, Ryohei Kaneko
  • Patent number: 7198406
    Abstract: A thrust sliding bearing includes an upper casing having a polyacetal resin-made flat annular surface and a lower casing superposed on the upper casing so as to be rotatable about an axis of the upper casing and having a polyacetal resin-made annular surface opposing the annular surface of the upper casing.
    Type: Grant
    Filed: January 20, 2003
    Date of Patent: April 3, 2007
    Assignee: Oiles Corporation
    Inventors: Tadashi Watai, Kazuyuki Miyata, Atsushi Ueno, Ryohei Kaneko
  • Publication number: 20060215944
    Abstract: A sliding bearing (1) includes an upper casing (3) which is made of polyacetal resin as a synthetic resin, has an annular surface (2), and serves as a first bearing body; a second bearing body (5) which is made of a synthetic resin, is superposed on the upper casing (3) so as to be rotatable about an axis (O), and has an synthetic resin-made annular surface (4) opposed to the annular surface (2); and a synthetic resin-made annular sheet (6) which is interposed between the annular surfaces (2) and (4) and slidably abuts against at least one of the upper casing (3) and the bearing body (5).
    Type: Application
    Filed: January 20, 2003
    Publication date: September 28, 2006
    Inventors: Tadashi Watai, Kazuyuki Miyata, Ryohei Kaneko
  • Publication number: 20040240761
    Abstract: A thrust sliding bearing (1) includes an upper casing (10) having a polyacetal resin-made flat annular surface (2) and a lower casing (20) superposed on the upper casing (10) so as to be rotatable about an axis (O) of the upper casing (10) and having a polyacetal resin-made annular surface (3) opposing the annular surface (2) of the upper casing (10).
    Type: Application
    Filed: June 25, 2004
    Publication date: December 2, 2004
    Inventors: Tadashi Watai, Kazuyuki Miyata, Atsushi Ueno, Ryohei Kaneko
  • 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: 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