Patents by Inventor Hiroshi Kiyosugi

Hiroshi Kiyosugi 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).

  • Magnetic brake system and elevator trouble detection system
    Patent number: 6742634
    Abstract: To accurately detect a trouble of a magnetic brake (2) by eliminating any effect of a temperature of a location at which an elevator is installed, a temperature sensor (3) is arranged to measure a temperature of the magnetic brake (2). When an armature (2c) has been attracted responsive to a brake release command, the temperature of the magnetic brake is measured as a first temperature, and before the armature returns responsive to a brake actuation command, the temperature of the magnetic brake is measured as a second temperature. The first and second temperatures are compared with each other. When a result of the comparison between the first and second temperatures is determined to be greater than a predetermined value, the magnetic brake (2) is determined to have been locked and hence, to have developed a trouble.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: June 1, 2004
    Assignee: Hitachi Building Systems Co., Ltd.
    Inventors: Yasushi Watanabe, Hiroshi Kiyosugi, Mikio Nakai, Yuki Ishida, Toshiaki Matsuo, Takashi Sekiya
  • Magnetic brake system and elevator trouble detection system
    Publication number: 20030111306
    Abstract: To accurately detect a trouble of a magnetic brake (2) by eliminating any effect of a temperature of a location at which an elevator is installed, a temperature sensor (3) is arranged to measure a temperature of the magnetic brake (2). When an armature (2c) has been attracted responsive to a brake release command, the temperature of the magnetic brake is measured as a first temperature, and before the armature returns responsive to a brake actuation command, the temperature of the magnetic brake is measured as a second temperature. The first and second temperatures are compared with each other. When a result of the comparison between the first and second temperatures is determined to be greater than a predetermined value, the magnetic brake (2) is determined to have been locked and hence, to have developed a trouble.
    Type: Application
    Filed: December 10, 2002
    Publication date: June 19, 2003
    Applicant: Hitachi Building Systems Co., Ltd.
    Inventors: Yasushi Watanabe, Hiroshi Kiyosugi, Mikio Nakai, Yuki Ishida, Toshiaki Matsuo, Takashi Sekiya