Patents by Inventor Christer Ring

Christer Ring 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).

  • Pump drive system for recirculation of coolant flow in a nuclear reactor vessel
    Patent number: 5621777
    Abstract: The invention relates to a drive system for internal recirculation of coolant in a nuclear reactor (1), wherein the drive system for a main recirculation pump (10) for the coolant recirculation comprises a pump motor (11) connected to the main recirculation pump (10) and a static frequency converter (F) for connection to an alternating voltage network (16) and for feeding the pump motor (11). The frequency converter (F) comprises a rectifier (12) for connection between the alternating voltage network (16) and a d.c. intermediate link (15) and a first inverter (13) for connection between the d.c. intermediate link (15) and the pump motor (11). The invention is characterized in that the energy storage magazine, for example a flywheel (18), is connected to the d.c. intermediate link (15) via a second inverter (14).
    Type: Grant
    Filed: February 7, 1995
    Date of Patent: April 15, 1997
    Assignee: ABB Atom AB
    Inventor: Christer Ring