Patents by Inventor Christopher D Jack

Christopher D Jack 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).

  • Clearance control apparatus
    Patent number: 7819623
    Abstract: A clearance control apparatus for controlling the clearance between a rotary assembly (17) and a casing (24) surrounding the rotary assembly (17) is disclosed. The clearance control apparatus comprises a temperature measuring device (34) to measure the temperature of a radially outer portion of the rotary assembly and a cooling arrangement (28) to cool the casing (24). A control system (36) is associated with the temperature measuring device (34) and the cooling arrangement (28) to control the extent of cooling of the casing (24). The extent of cooling is dependent upon the temperature of the aforesaid portion.
    Type: Grant
    Filed: May 8, 2007
    Date of Patent: October 26, 2010
    Assignee: Rolls-Royce plc
    Inventors: Roger A Sutherland, Colin R Barnfather, Jonathan E Holt, Christopher D Jack, Ralph W Hill