Patents by Inventor Masayoshi Ojima

Masayoshi Ojima 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).

  • Publication number: 20240004380
    Abstract: A data analysis unit includes a validity determination unit that calculates a determination factor for determining the validity of a data analysis process to determine the validity of the data analysis process, and displays the validity determination result on a display device.
    Type: Application
    Filed: August 24, 2021
    Publication date: January 4, 2024
    Inventors: Masayoshi OJIMA, Masahiro YAMAZAKI, Kenji SATO, Yutaka KOBAYASHI, Hideyuki GOTOU
  • Patent number: 11372048
    Abstract: The invention provides a diagnostic device including: an input/output unit that receives an input of a current value indicating a value of a current of an electric motor measured by a sensor; a frequency analysis unit that converts the current value measured by the sensor into a frequency intensity; a deterioration mode decomposition unit that uses a state mode model indicating a change situation of a frequency intensity in a part constituting the electric motor to calculate an activity level indicating a time series change of a deterioration intensity for each state mode model from the frequency intensity; and an abnormality determination unit that determines a deterioration and an abnormality of each part using the activity level.
    Type: Grant
    Filed: November 17, 2020
    Date of Patent: June 28, 2022
    Assignee: HITACHI, LTD.
    Inventors: Akari Kubo, Masayoshi Ojima, Hiroaki Kojima
  • Publication number: 20210165045
    Abstract: The invention provides a diagnostic device including: an input/output unit that receives an input of a current value indicating a value of a current of an electric motor measured by a sensor; a frequency analysis unit that converts the current value measured by the sensor into a frequency intensity; a deterioration mode decomposition unit that uses a state mode model indicating a change situation of a frequency intensity in a part constituting the electric motor to calculate an activity level indicating a time series change of a deterioration intensity for each state mode model from the frequency intensity; and an abnormality determination unit that determines a deterioration and an abnormality of each part using the activity level.
    Type: Application
    Filed: November 17, 2020
    Publication date: June 3, 2021
    Inventors: Akari KUBO, Masayoshi OJIMA, Hiroaki KOJIMA
  • Publication number: 20140042863
    Abstract: In a brushed direct current motor including a stator that is provided with 2×P magnetic poles (P is odd and greater than or equal to three), an armature core rotatably held with respect to the stator and includes P×N±2 teeth (N is an even and greater than or equal to four) in a circumferential direction, a commutator held so as to integrally rotate with the armature core and includes commutator segments, the number of the commutator segments being the same as that of the teeth, a winding wound around the teeth in a double-wave form, and two anode brushes and two cathode brushes arranged in sliding contact with the commutator, a width angle WB of each of the brushes in sliding contact with the commutator is set so as to satisfy a relation of “WB>WP+WI”.
    Type: Application
    Filed: July 12, 2013
    Publication date: February 13, 2014
    Inventors: Masayoshi OJIMA, Kohji MAKI
  • Patent number: 4771132
    Abstract: A cuprophthalocyanine type compound represented by formula [1] in the form of free acid ##STR1## (wherein D is a cuprophthalocyanine radical; B is an alkylene group of 2 to 4 carbon atoms or a phenylene group which may have one or two carboxyl group(s) or sulfonic acid group(s) as a substituent(s); R is a lower alkyl group or a lower alkoxy-lower alkyl group; X is a carboxyl group or a carbamoyl group and combines with the 3- or 4-position of the pyridine ring; l is 1, 2 or 3; m is 0, 1 or 2; n is 1 or 2; and the sum of l, m and n is 2, 3 or 4) as well as a method for dyeing cellulosic fiber materials using the said compounds.
    Type: Grant
    Filed: May 22, 1986
    Date of Patent: September 13, 1988
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Ryuzo Orita, Masayoshi Ojima, Shigeo Yamamura
  • Patent number: 4453945
    Abstract: The present invention relates to a process for dyeing cellulose fibers or its union fibers which is effected according to an exhaustion dyeing method using a reactive dye containing at least one s-triazinyl group having a group of the formula: ##STR1## wherein M represents a hydrogen or an alkali metal, in an aqueous dyeing bath having a pH in the range of 4 to 10 and a dyeing temperature in the range of 110.degree. C. to below 140.degree. C.
    Type: Grant
    Filed: April 19, 1983
    Date of Patent: June 12, 1984
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Masakatsu Miyamoto, Yoshiharu Suzuki, Masayoshi Ojima, Yutaka Iizuka, Ryuzo Orita, Tadashi Matsuo