Patents by Inventor Christopher John Terlet

Christopher John Terlet 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).

  • Transmission sleeve
    Patent number: 7290626
    Abstract: The invention is a transmission sleeve for the reverse circulation down hole hammer activated by fluid under pressure, the hammer including an outer hammer casing, a drill bit retaining means (17) and a drill bit (10) retaining means (17) and extending forwardly therefrom. The transmission sleeve (25) comprises a transmission sleeve retaining means to retain the transmission sleeve (25) to the hammer, a flange (28) to direct exhaust fluid from the hammer extending from the transmission sleeve retaining means towards the cutting face (14) of the drill bit (10) so that the exhaust fluid is directed towards the cutting face (14) and a chamber (30) that extends circumferentially around the drill bit (10) into which the exhaust fluid flows prior to discharge from the end of the flange (28).
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: November 6, 2007
    Assignee: SDS Digger Tools Pty Ltd
    Inventors: Christopher John Terlet, Fredric Graham Moir, Malcolm Bicknell McInnes, Anthony Joseph Alexander DeBarro