Patents by Inventor Daisuke Tominaga
Daisuke Tominaga 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: 10302131Abstract: A tapered roller bearing (1) is includes an outer ring (2) having an outer ring raceway surface (2a) on the inner peripheral surface thereof, an inner ring (3) having an inner ring raceway surface (3a) on the outer peripheral surface thereof, and a plurality of tapered rollers (4) arranged in a rollable manner between the outer ring raceway surface (2a) and the inner ring raceway surface (3a). A large flange (3b) is formed on an end portion of the inner ring (3) on a large-diameter side of the inner ring, and the inner ring raceway surface (3a) continuously extends to the end face (3c) of the inner ring (3) on a small-diameter side of the inner ring. The contact angle (?) is 37°30? to 50°. In this manner, the tapered roller bearing having high moment rigidity and long life can be provided.Type: GrantFiled: August 31, 2017Date of Patent: May 28, 2019Assignee: NSK LTD.Inventors: Makoto Koganei, Daisuke Tominaga, Hiroshi Sakamoto, Shunichi Kiyono, Mamoru Aoki
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Patent number: 9995341Abstract: Provided is a resin cage for a tapered roller bearing in which a mold parting line which is extended in an axial direction is formed in a pillar portion defining a pocket. On facing surfaces of adjacent pillar portions, on an outer diameter side from the mold parting line, a first conical surface which slides in contact with an outer peripheral surface of a tapered roller is formed, and a first flat surface in a radial direction is formed in a portion on the outer diameter side from the first conical surface. On an inner diameter side from the mold parting line, a second conical surface which slides in contact with the outer peripheral surface of the tapered roller is formed, and a second flat surface in a radial direction is formed in a portion on the inner diameter side from the second conical surface.Type: GrantFiled: April 27, 2017Date of Patent: June 12, 2018Assignee: NSK LTD.Inventors: Makoto Koganei, Hiroshi Sakamoto, Daisuke Tominaga, Shunichi Kiyono, Mamoru Aoki, Tatsuya Minamiyama, Masayoshi Nakamura, Kiyoshi Yamamoto
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Publication number: 20170363146Abstract: A tapered roller bearing (1) is includes an outer ring (2) having an outer ring raceway surface (2a) on the inner peripheral surface thereof, an inner ring (3) having an inner ring raceway surface (3a) on the outer peripheral surface thereof, and a plurality of tapered rollers (4) arranged in a rollable manner between the outer ring raceway surface (2a) and the inner ring raceway surface (3a). A large flange (3b) is formed on an end portion of the inner ring (3) on a large-diameter side of the inner ring, and the inner ring raceway surface (3a) continuously extends to the end face (3c) of the inner ring (3) on a small-diameter side of the inner ring. The contact angle (?) is 37°30? to 50°. In this manner, the tapered roller bearing having high moment rigidity and long life can be provided.Type: ApplicationFiled: August 31, 2017Publication date: December 21, 2017Applicant: NSK LTD.Inventors: Makoto KOGANEI, Daisuke TOMINAGA, Hiroshi SAKAMOTO, Shunichi KIYONO, Mamoru AOKI
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Publication number: 20170227052Abstract: Provided is a resin cage for a tapered roller bearing in which a mold parting line which is extended in an axial direction is formed in a pillar portion defining a pocket. On facing surfaces of adjacent pillar portions, on an outer diameter side from the mold parting line, a first conical surface which slides in contact with an outer peripheral surface of a tapered roller is formed, and a first flat surface in a radial direction is formed in a portion on the outer diameter side from the first conical surface.Type: ApplicationFiled: April 27, 2017Publication date: August 10, 2017Applicant: NSK LTD.Inventors: Makoto KOGANEI, Hiroshi SAKAMOTO, Daisuke TOMINAGA, Shunichi KIYONO, Mamoru AOKI, Tatsuya MINAMIYAMA, Masayoshi NAKAMURA, Kiyoshi YAMAMOTO
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Publication number: 20170204906Abstract: A tapered roller bearing (1) is includes an outer ring (2) having an outer ring raceway surface (2a) on the inner peripheral surface thereof, an inner ring (3) having an inner ring raceway surface (3a) on the outer peripheral surface thereof, and a plurality of tapered rollers (4) arranged in a rollable manner between the outer ring raceway surface (2a) and the inner ring raceway surface (3a). A large flange (3b) is formed on an end portion of the inner ring (3) on a large-diameter side of the inner ring, and the inner ring raceway surface (3a) continuously extends to the end face (3c) of the inner ring (3) on a small-diameter side of the inner ring. The contact angle (?) is 35° to 55°. In this manner, the tapered roller bearing having high moment rigidity and long life can be provided.Type: ApplicationFiled: March 1, 2017Publication date: July 20, 2017Applicant: NSK LTD.Inventors: Makoto KOGANEI, Daisuke TOMINAGA, Hiroshi SAKAMOTO, Shunichi KIYONO, Mamoru AOKI
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Publication number: 20160040716Abstract: Provided is a resin cage for a tapered roller bearing in which a mold parting line which is extended in an axial direction is formed in a pillar portion defining a pocket. On facing surfaces of adjacent pillar portions, on an outer diameter side from the mold parting line, a first conical surface which slides in contact with an outer peripheral surface of a tapered roller is formed, and a first flat surface in a radial direction is formed in a portion on the outer diameter side from the conical surface. On an inner diameter side from the mold parting line, a second conical surface which slides in contact with the outer peripheral surface of the tapered roller is formed, and a second flat surface in a radial direction is formed in a portion on the inner diameter side from the second conical surface.Type: ApplicationFiled: April 4, 2014Publication date: February 11, 2016Applicant: NSK LTD.Inventors: Makoto KOGANEI, Hiroshi SAKAMOTO, Daisuke TOMINAGA, Shunichi KIYONO, Mamoru AOKI, Tatsuya MINAMIYAMA, Masayoshi NAKAMURA, Kiyoshi YAMAMOTO
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Publication number: 20150323008Abstract: A tapered roller bearing (1) is includes an outer ring (2) having an outer ring raceway surface (2a) on the inner peripheral surface thereof, an inner ring (3) having an inner ring raceway surface (3a) on the outer peripheral surface thereof, and a plurality of tapered rollers (4) arranged in a rollable manner between the outer ring raceway surface (2a) and the inner ring raceway surface (3a). A large flange (3b) is formed on an end portion of the inner ring (3) on a large-diameter side of the inner ring, and the inner ring raceway surface (3a) continuously extends to the end face (3c) of the inner ring (3) on a small-diameter side of the inner ring. The contact angle (?) is 35° to 55°. In this manner, the tapered roller bearing having high moment rigidity and long life can be provided.Type: ApplicationFiled: December 25, 2012Publication date: November 12, 2015Applicant: NSK LTD.Inventors: Makoto KOGANEI, Daisuke TOMINAGA, Hiroshi SAKAMOTO, Shunichi KIYONO, Mamoru AOKI
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Publication number: 20060242214Abstract: There is provided a periodicity judgment apparatus 100 to judge periodicity of time series data. A reception unit 206 receives the time series data and a set value of a period. A DFT transform unit 216 performs a Fourier transform of the time series data to obtain a Fourier coefficient vector. A Fourier coefficient adjustment unit 218 adjusts the Fourier coefficient vector to obtain plural Fourier coefficient vectors different in adjustment level. An inverse DFT transform unit 220 performs inverse Fourier transforms of the Fourier transform vectors to obtain inverse transformed data. A BIC calculation unit 228 calculates a BIC of the inverse transformed data. A periodicity judgment unit 234 judges whether a spectrum of the period of the set value is included in the Fourier coefficient vector corresponding to the inverse transformed data whose BIC is smallest. An output unit 208 outputs a judgment result of the periodicity judgment unit.Type: ApplicationFiled: March 15, 2006Publication date: October 26, 2006Inventor: Daisuke Tominaga
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Patent number: D771166Type: GrantFiled: June 19, 2014Date of Patent: November 8, 2016Assignee: NSK LTD.Inventors: Makoto Koganei, Daisuke Tominaga, Hiroshi Sakamoto, Shunichi Kiyono, Mamoru Aoki