Patents by Inventor John N. Calvin

John N. Calvin 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).

  • Hydraulic hold-down for nuclear reactor fuel
    Patent number: 4174257
    Abstract: A fuel assembly for a nuclear reactor has a pressure plate attached to the lower end thereof. The upper side of the pressure plate is exposed to the ambient pressure of the reactor coolant. The lower side of the pressure plate is exposed to a pressure from another location in the reactor, selected so that the pressure above the pressure plate is greater than that below the pressure plate.
    Type: Grant
    Filed: June 1, 1978
    Date of Patent: November 13, 1979
    Assignee: Combustion Engineering, Inc.
    Inventor: John N. Calvin
  • Hydraulic hold-down for nuclear reactor fuel
    Patent number: 4135971
    Abstract: A fuel assembly for a nuclear reactor has a pressure plate attached to the upper or lower end thereof. The side of the pressure plate adjacent the fuel elements is exposed to the ambient pressure of the reactor coolant. The alternate side of the pressure plate is exposed to a pressure from another location in the reactor, selected so that the pressure above the pressure plate is greater than that below the pressure plate.
    Type: Grant
    Filed: April 4, 1977
    Date of Patent: January 23, 1979
    Assignee: Combustion Engineering, Inc.
    Inventor: John N. Calvin