Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Method and system for dynamically representing distributed information
Focus adjustment unit and optical scanning microscope
Compositions and methods for concentrating and depleting microorganisms
Testing SQL query writing skills
Method for superconducting connection between MgB2 superconducting wires via a MgB2 matrix made from a boron powder compressed element infiltrated with Mg
Faucet
Automatically selecting a paper with increased dimensions than originally desired for printing and adding advertisement content to the increased dimensional area of the paper
  Randomly Featured Patents
Ultrasound imaging system apparatus and method with ADC saturation monitor
Ornate contact lens
Non-contacting electromagnetic thickness gauge for sheet measurement having improved small distance sensitivity
Gravity feed bottle dispensing device and method of dispensing bottles
Device for adjusting valve timing in an internal combustion engine
Phosphoroamidothioates
Flash fibrillation process
Acrylic SMC or BMC, production thereof, method for producing acrylic artificial marble, and thickening agent
Method of preparing N-substituted 3,5-dicyan-1,4-dihydropyridines
Navigation apparatus for vehicle