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).
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Patent number: 9062708Abstract: 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: GrantFiled: May 30, 2012Date of Patent: June 23, 2015Assignee: OILES CORPORATIONInventors: Kouichi Morishige, Katsunori Saito, Tadashi Watai
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Publication number: 20140119682Abstract: 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: ApplicationFiled: May 30, 2012Publication date: May 1, 2014Applicant: OILES CORPORATIONInventors: Kouichi Morishige, Katsunori Saito, Tadashi Watai
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Patent number: 7993061Abstract: 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: GrantFiled: June 30, 2008Date of Patent: August 9, 2011Assignee: Oiles CorporationInventors: Tadashi Watai, Kazuyuki Miyata, Ryohei Kaneko
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Publication number: 20110148064Abstract: 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: ApplicationFiled: August 26, 2009Publication date: June 23, 2011Inventors: Sumihide Yanase, Takashi Nakamaru, Tadashi Watai, Satoshi Takamura, Eiichi Yamashita
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Publication number: 20080310780Abstract: 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: ApplicationFiled: June 30, 2008Publication date: December 18, 2008Applicant: OILES CORPORATIONInventors: Tadashi Watai, Kazuyuki Miyata, Ryohei Kaneko
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Patent number: 7407329Abstract: 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: GrantFiled: June 7, 2007Date of Patent: August 5, 2008Assignee: Oiles CorporationInventors: Tadashi Watai, Kazuyuki Miyata, Ryohei Kaneko
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Patent number: 7357578Abstract: 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: GrantFiled: January 12, 2007Date of Patent: April 15, 2008Assignee: Oiles CorporationInventors: Tadashi Watai, Kazuyuki Miyata, Atsushi Ueno, Ryohei Kaneko
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Patent number: 7293918Abstract: 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: GrantFiled: January 20, 2003Date of Patent: November 13, 2007Assignee: Oiles CorporationInventors: Tadashi Watai, Kazuyuki Miyata, Ryohei Kaneko
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Publication number: 20070237439Abstract: 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: ApplicationFiled: June 7, 2007Publication date: October 11, 2007Applicant: OILES CORPORATIONInventors: Tadashi Watai, Kazuyuki Miyata, Ryohei Kaneko
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Publication number: 20070116391Abstract: 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: ApplicationFiled: January 12, 2007Publication date: May 24, 2007Applicant: OILES CORPORATIONInventors: Tadashi Watai, Kazuyuki Miyata, Atsushi Ueno, Ryohei Kaneko
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Patent number: 7198406Abstract: 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: GrantFiled: January 20, 2003Date of Patent: April 3, 2007Assignee: Oiles CorporationInventors: Tadashi Watai, Kazuyuki Miyata, Atsushi Ueno, Ryohei Kaneko
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Publication number: 20060215944Abstract: 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: ApplicationFiled: January 20, 2003Publication date: September 28, 2006Inventors: Tadashi Watai, Kazuyuki Miyata, Ryohei Kaneko
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Publication number: 20040240761Abstract: 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: ApplicationFiled: June 25, 2004Publication date: December 2, 2004Inventors: Tadashi Watai, Kazuyuki Miyata, Atsushi Ueno, Ryohei Kaneko
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Patent number: 5624887Abstract: 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: GrantFiled: January 30, 1995Date of Patent: April 29, 1997Assignee: Oiles CorporationInventors: Takashi Nakamaru, Tadashi Watai, Akihiko Okimura, Sumihide Yanase
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Patent number: 5433870Abstract: 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: GrantFiled: September 23, 1993Date of Patent: July 18, 1995Assignee: Oiles CorporationInventors: Takashi Nakamaru, Tadashi Watai, Akihiko Okimura, Sumihide Yanase
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Patent number: 5354622Abstract: 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: GrantFiled: July 28, 1993Date of Patent: October 11, 1994Assignee: Oiles CorporationInventors: Takashi Nakamaru, Tadashi Watai, Akihiko Okimura, Sumihide Yanase
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Patent number: 5300366Abstract: 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: GrantFiled: April 29, 1991Date of Patent: April 5, 1994Assignee: Oiles CorporationInventors: Takashi Nakamaru, Tadashi Watai, Masayuki Rokugawa, Kouichi Tsunoda, Tadayoshi Umeki, Takayuki Miyaji, Kenji Yamada