Patents by Inventor James E. Forfar

James E. Forfar 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).

  • Patent number: 7159872
    Abstract: A seal arrangement (73) is provided in which seal elements (77) incorporate passages (90) allowing an air flow to be presented to tip edges (78) of the seal elements, in order to create air suspension and diminish excessive wear. These passages (90) are created by recesses in the respective adjacent juxtaposed seal elements (77). In a seal assembly (71) a seal arrangement (73) is secured within a float chamber (70) whereby radial movement is allowed to accommodate for movements in the shaft (72). The radial movement is resisted by a bias created by air flow (86) into the float chamber (70). The air flow (86) may also be presented through the passages (90) in order to create the desired air suspension of the seal elements (77).
    Type: Grant
    Filed: September 28, 2005
    Date of Patent: January 9, 2007
    Assignee: Rolls-Royce plc
    Inventors: Richard Nicholson, James E. Forfar