Patents by Inventor Sadakazu Enomoto

Sadakazu Enomoto 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).

  • Secondary battery charging circuit
    Patent number: 5483145
    Abstract: A secondary battery charging circuit of this invention includes a charging source for supplying a charging current to a secondary battery, a temperature detection unit for generating an output which changes almost linearly with respect to a change in temperature of the secondary battery during a charging operation, a differential unit for obtaining a differential value of an output from the temperature detection unit, a comparator unit for comparing the differential value during the charging operation with a setting value, and for, when the relationship between the two values is reversed, generating an inverted output, a timer circuit unit, started simultaneously with start of the charging operation of the secondary battery, for generating a timer output after an elapse of a predetermined period of time, and a charge control unit for controlling the charging operation of the secondary battery in response to one, generated earlier, of the inverted output from the comparator unit, and the timer output from the
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: January 9, 1996
    Assignee: Toshiba Battery Co., Ltd.
    Inventors: Nobuo Shiojima, Sadakazu Enomoto
  • Secondary battery charging circuit
    Patent number: 5477127
    Abstract: A secondary battery charging circuit of this invention includes a charging source for supplying a charging current to a secondary battery, a temperature detection unit for generating an output which changes almost linearly with respect to a change in temperature of the secondary battery during a charging operation, a differential unit for obtaining a differential value of an output from the temperature detection unit, a comparator unit for comparing the differential value during the charging operation with a setting value, and for, when the relationship between the two values is reversed, generating an inverted output, a timer circuit unit, started simultaneously with start of the charging operation of the secondary battery, for generating a timer output after an elapse of a predetermined period of time, and a charge control unit for controlling the charging operation of the secondary battery in response to one, generated earlier, of the inverted output from the comparator unit, and the timer output from the
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: December 19, 1995
    Assignee: Toshiba Battery Co., Ltd.
    Inventors: Nobuo Shiojima, Sadakazu Enomoto
  • Secondary battery charging circuit
    Patent number: 5391974
    Abstract: A secondary battery charging circuit of this invention includes a charging source for supplying a charging current to a secondary battery, a temperature detection unit for generating an output which changes almost linearly with respect to a change in temperature of the secondary battery during a charging operation, a differential unit for obtaining a differential value of an output from the temperature detection unit, a comparator unit for comparing the differential value during the charging operation with a setting value, and for, when the relationship between the two values is reversed, generating an inverted output, a timer circuit unit, started simultaneously with start of the charging operation of the secondary battery, for generating a timer output after an elapse of a predetermined period of time, and a charge control unit for controlling the charging operation of the secondary battery in response to one, generated earlier, of the inverted output from the comparator unit, and the timer output from the
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: February 21, 1995
    Assignee: Toshiba Battery Co., Ltd.
    Inventors: Nobuo Shiojima, Sadakazu Enomoto