Patents by Inventor Yoji Nagayasu

Yoji Nagayasu 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).

  • Method of predicting residual service life for rolling bearings and a device for predicting residual service life for rolling bearings
    Patent number: 7813906
    Abstract: A method that utilizes signals from an accelerometer in resonant frequency bands or high frequency bands to, in a cost-effective manner, measure wear particle penetration of lubricant and lubricant degradation, both of which greatly affect prediction of residual service life; and, using as a basis these measurements of wear particle penetration and lubricant degradation, enables accurate estimation of residual service life for rolling bearings in the early stages.
    Type: Grant
    Filed: May 28, 2003
    Date of Patent: October 12, 2010
    Assignees: The Chugoku Electric Power Co., Inc.
    Inventors: Isao Shiromaru, Makoto Tanaka, Yoshinobu Akamatsu, Yoji Nagayasu, Shingo Boda, Takuzo Iwatsubo
  • Method and device for assessing residual service life of rolling bearing
    Patent number: 7559240
    Abstract: Degradation of the lubricant due to contamination of the lubricant with wear particles or moisture, which greatly affects the service life of rolling bearings, can be detected in a cost-effective manner through the use of a resonance frequency band signal or high-frequency signal of an accelerometer, and the service life of a rolling bearing can be estimated with high precision at an early stage on the basis of the detected state of the wear particles and lubricant.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: July 14, 2009
    Assignees: Chugoku Electric Power Co., Inc.
    Inventors: Takuzo Iwatsubo, Isao Shiromaru, Makoto Tanaka, Yoshibobu Akamatsu, Hideko Nagayasu, legal representative, Shingo Boda, Yoji Nagayasu
  • Method And Device For Assessing Residual Service Life Of Rolling Bearing
    Publication number: 20070277613
    Abstract: Degradation of the lubricant due to contamination of the lubricant with wear particles or moisture, which greatly affects the service life of rolling bearings, can be detected in a cost-effective manner through the use of a resonance frequency band signal or high-frequency signal of an accelerometer, and the service life of a rolling bearing can be estimated with high precision at an early stage on the basis of the detected state of the wear particles and lubricant.
    Type: Application
    Filed: March 29, 2005
    Publication date: December 6, 2007
    Inventors: Takuzo Iwatsubo, Isao Shiromaru, Makoto Tanaka, Yoshinobu Akamatsu, Yoji Nagayasu, Hideko Nagayasu, Shingo Boda
  • Method and apparatus for diagnosing residual life of rolling element bearing
    Publication number: 20050246150
    Abstract: An invention that utilizes signals from an accelerometer in resonant frequency bands or high frequency bands to, in a cost-effective manner, measure wear particle penetration of lubricant and lubricant degradation, both of which greatly affect prediction of residual service life; and, using as a basis these measurements of wear particle penetration and lubricant degradation, enables accurate estimation of residual service life for rolling bearings in the early stages.
    Type: Application
    Filed: May 28, 2003
    Publication date: November 3, 2005
    Applicant: THE CHUGOKU ELECTRIC POWER CO., LTD
    Inventors: Isao Shiromaru, Makoto Tanaka, Yoshinobu Akamatsu, Yoji Nagayasu, Shingo Boda, Takuzo Iwatsubo