Patents by Inventor Hisashi Yoshizaki

Hisashi Yoshizaki 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 swing stopping control and system of swing stopping control of suspended load of crane
    Patent number: 8955701
    Abstract: A method of swing stopping control of a suspended load of a crane including a hoist and a trolley solves an equation of motion, given as an equation with respect to the deviation angle of a suspended load from the vertical direction when the trolley travels, for the trolley acceleration to thereby obtain the value of the acceleration or deceleration of the trolley, obtains speed patterns corresponding to the values of the acceleration or deceleration, drives the trolley according to the obtained speed patterns, and carries out control so that the deviation angle of the suspended load from the vertical direction becomes zero at the time when the acceleration or deceleration of the trolley is ended. Thus, even if the length of a rope holding the suspended load up is changed, a required speed pattern is produced to permit highly accurate positioning.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: February 17, 2015
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Hideto Ueda, Takayuki Kaneko, Hisashi Yoshizaki
  • METHOD OF SWING STOPPING CONTROL AND SYSTEM OF SWING STOPPING CONTROL OF SUSPENDED LOAD OF CRANE
    Publication number: 20120234787
    Abstract: A method of swing stopping control of a suspended load of a crane including a hoist and a trolley solves an equation of motion, given as an equation with respect to the deviation angle of a suspended load from the vertical direction when the trolley travels, for the trolley acceleration to thereby obtain the value of the acceleration or deceleration of the trolley, obtains speed patterns corresponding to the values of the acceleration or deceleration, drives the trolley according to the obtained speed patterns, and carries out control so that the deviation angle of the suspended load from the vertical direction becomes zero at the time when the acceleration or deceleration of the trolley is ended. Thus, even if the length of a rope holding the suspended load up is changed, a required speed pattern is produced to permit highly accurate positioning.
    Type: Application
    Filed: March 9, 2012
    Publication date: September 20, 2012
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Hideto UEDA, Takayuki Kaneko, Hisashi Yoshizaki