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
Process to extract quassinoids
Pharmaceutical and diagnostic compositions for use in the treatment and diagnosis of neurodegenerative diseases or amyloid diseases
Normalized contextual performance metric for the assessment of fatigue-related incidents
Method and apparatus for allocating and obtaining IP address
Plants and seeds of hybrid corn variety CH336383
Fixing device, fixing device control method, and image forming apparatus
System and method of detecting and locating intermittent and other faults
  Randomly Featured Patents
Swing-frame motor flow and sensed load pressure control system for hydraulic excavator
Preparation of diagnostic agents by spray drying
Multi-furcated ePTFE grafts and stent-graft prostheses and methods of making the same
Maneuvering robotic vehicles
Method and apparatus for team play of slot machines
Method for determining whether or not a mammal is affected with a lung cancer
Convertible combination batter mixer and applicator machine
Method and apparatus for achieving dynamic path control of multiple robots
Network system, node device and management server
Transdermal release system for pharmaceutical preparation