Patents by Inventor Daniel Gratton

Daniel Gratton 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).

  • Method of surge detection
    Patent number: 5402632
    Abstract: The double derivative of the gas generator shaft (16) is sensed and compared to upper and lower limits to determine breaches of these limits within a first predetermined time, in which case a first potential surge condition is declared. The derivative of torque, or the double derivative of shaft speed, of the power shaft (22) is sensed and compared to upper and lower limits to determine breaches of these limits within a second predetermined time, in which case a second potential surge condition is declared. If both a first and second potential surge condition is declared within a third predetermined time, an actual surge condition is declared.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: April 4, 1995
    Assignee: Pratt & Whitney Canada, Inc.
    Inventors: Anthony Nobre, Daniel Gratton