Resources Contact Us Home
Shield tunneling machine

Image Number 5 for United States Patent #5393172.

A shield tunneling machine comprises a shield body having a soil chamber, an inside chamber and a partition wall. The soil chamber has a conical peripheral surface converging gradually rearward. A crankshaft having an eccentric portion is rotatably supported by the partition wall at the center of the partition wall corresponding to the axis of the shield body. A cutter disc with roller bits is secured to a front end of the crankshaft, and a conical rotor is rotatably mounted on the eccentric portion of the crankshaft behind the cutter disc. Since the cutter disc is rotated at an increased rotary velocity by five to ten times as many as that of a cutter disc in a conventional shield tunneling machine, crushing of gravel can be efficiently carried out by the cutter disc with roller bits in cooperation with the conical rotor mounted on the crankshaft.

  Recently Added Patents
Wide-range clock multiplier
System and method for forming a support article
Animal waste disposal system
Integrated circuit having field effect transistors and manufacturing method
Compact closed-loop electrolyzing process and apparatus
Method and system for validating site data
Planar light-emitting device
  Randomly Featured Patents
Resin sealed ceramic package and semiconductor device
Dynamic storage element
Hydrodesulfurization process with upstaged reactor zones
Audience segment selection
Peptides with organo-protective activity, a process for preparation thereof and their use in therapy
Passenger slide
Composition for microstructured screens
Apparatus for determining the oscillation parameters of a band
Fuel rail vent system
Axial movement linear gauging head