Resources Contact Us Home
Apparatus for and a method of tunnelling

Image Number 3 for United States Patent #4084386.

A drive shield of a tunnelling apparatus has elongate drive members supported and guided for longitudinal movement in a manner known per se. The drive members are connected to rear members or tails forming a rear shield and fluid concrete is introduced into a reception space within the rear shield to create a permanent lining for the tunnel. The rear members are shaped or profiled to provide recesses which are closed-off over a certain zone with the aid of covers. Reinforcing bars or the like can be inserted into the recesses to become cast into the concrete lining and means for delimiting the front end of the concrete reception space, such as a ring component, engages on the covers which form a smooth continuous bearing surface therefor.

  Recently Added Patents
NMR, instrumentation, and flow meter/controller continuously detecting MR signals, from continuously flowing sample material
Data portal for concurrent assessment
Flood protection apparatus and container data center including the same
Synchronization scheduling apparatus and method in real-time multi-core system
Blur correction device and imaging apparatus
System and method for providing radio communication in a land mobile radio system
Fixing apparatus
  Randomly Featured Patents
Method and device for tissue resection
Desk-top communications radio unit or similar article
Development of raster scan images from independent cells of imaged data
Casting mould for manufacturing a cooling element and cooling element in said mould
Transparent recording film
Arylene sulfide polymer prepared from aminoalkanoate
Electron beam generating apparatus and optical sampling apparatus using the same
Nuclear power generating station equipment qualification method and apparatus
Piezoelectric/electrostrictive device
Information carrier, device for reading and device for providing the information carrier and method of transmitting picture information