Patents by Inventor Hideyuki Hidaka

Hideyuki Hidaka 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: 9394583
    Abstract: A rolling bearing in which at least one of the bearing rings is obtained by applying a induction heat treatment to a spheroidizing annealed steel material having a DI value of 1.0 or more to form a hardened layer having a hardness of 550 HV or more on at least a raceway surface and a fitting surface. In the induction heat-treated bearing ring, (A) an average retained austenite amount is 12 vol % or less, (B) the raceway surface has a retained austenite amount of 12 vol % or more and a residual compressive stress of ?100 MPa or less, and (C) a difference between a hardness of the raceway surface and a minimum hardness of a region having a hardness of less than 550 HV is 150 HV or more.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: July 19, 2016
    Assignee: NSK LTD.
    Inventors: Hideyuki Hidaka, Daisuke Watanuki, Kazuki Tamura
  • Publication number: 20160108491
    Abstract: A rolling bearing in which at least one of the bearing rings is obtained by applying a induction heat treatment to a spheroidizing annealed steel material having a DI value of 1.0 or more to form a hardened layer having a hardness of 550 HV or more on at least a raceway surface and a fitting surface. In the induction heat-treated bearing ring, (A) an average retained austenite amount is 12 vol % or less, (B) the raceway surface has a retained austenite amount of 12 vol % or more and a residual compressive stress of ?100 MPa or less, and (C) a difference between a hardness of the raceway surface and a minimum hardness of a region having a hardness of less than 550 HV is 150 HV or more.
    Type: Application
    Filed: December 22, 2015
    Publication date: April 21, 2016
    Applicant: NSK LTD.
    Inventors: Hideyuki HIDAKA, Daisuke WATANUKI, Kazuki TAMURA
  • Patent number: 9249476
    Abstract: In the rolling bearing of the present invention, at least one of the bearing rings is obtained by applying a induction heat treatment to a spheroidizing annealed steel material having a DI value of 1.0 or more to form a hardened layer having a hardness of 550 HV or more on at least a raceway surface and a fitting surface, and in the induction heat-treated bearing ring, (A) an average retained austenite amount is 12 vol % or less, (B) the raceway surface has a retained austenite amount of 12 vol % or more and a residual compressive stress of ?100 MPa or less, and (C) a difference between a hardness of the raceway surface and a minimum hardness of a region having a hardness of less than 550 HV is 150 HV or more.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: February 2, 2016
    Assignee: NSK LTD.
    Inventors: Hideyuki Hidaka, Daisuke Watanuki, Kazuki Tamura
  • Publication number: 20150259764
    Abstract: In the rolling bearing of the present invention, at least one of the bearing rings is obtained by applying a induction heat treatment to a spheroidizing annealed steel material having a DI value of 1.0 or more to form a hardened layer having a hardness of 550 HV or more on at least a raceway surface and a fitting surface, and in the induction heat-treated bearing ring, (A) an average retained austenite amount is 12 vol % or less, (B) the raceway surface has a retained austenite amount of 12 vol % or more and a residual compressive stress of ?100 MPa or less, and (C) a difference between a hardness of the raceway surface and a minimum hardness of a region having a hardness of less than 550 HV is 150 HV or more.
    Type: Application
    Filed: August 7, 2013
    Publication date: September 17, 2015
    Applicant: NSK LTD.
    Inventors: Hideyuki Hidaka, Daisuke Watanuki, Kazuki Tamura
  • Publication number: 20100027890
    Abstract: An eye-gaze direction calculation unit calculates the eye-gaze direction in an input facial image of a person by carrying out prescribed operation processing based on iris shape data output from an iris detection unit and face-direction measurement data output from a face-direction measurement unit. The eye-gaze direction of the facial image of the person can be measured on the basis of accurate iris shape information obtained by an iris shape detection unit. The iris and sclera regions can be estimated on the basis of the detected eyelid contour information, thereby making it possible to accurately estimate the shape of the iris.
    Type: Application
    Filed: June 10, 2009
    Publication date: February 4, 2010
    Inventors: Tomoaki YOSHINAGA, Shigeki Nagaya, Chiharu Sayama, Hideyuki Hidaka, Hiroyuki Shimokawa, Hiroshi Watanabe