Patents by Inventor Rupert John Sidney McBean

Rupert John Sidney McBean 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).

  • Tunnelling shields
    Patent number: 3969906
    Abstract: A tunnelling shield has a rearward rotatable part having a spiral rearward end to engage a forward end of a spiral tunnel lining. A drive mechanism rotates the rearward shield part as further tunnel segments are laid one by one in the shield end against the previous segment to be erected. Rams advance the shield as the rearward end rotates to allow a newly erected segment to engage the tunnel wall.
    Type: Grant
    Filed: September 13, 1974
    Date of Patent: July 20, 1976
    Assignee: Charcon Tunnels Limited
    Inventor: Rupert John Sidney McBean