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
Methods and systems for enabling community-tested security features for legacy applications
Subcarrier cluster-based power control in wireless communications
Method and apparatus for efficiently inserting fills in an integrated circuit layout
Silicas and alkali metal salt compositions, detergents formed from such compositions and method of forming such compositions and detergents
Dental plier
System, apparatus, and method for fast startup of USB devices
Energy drink package
  Randomly Featured Patents
Uniformly mixed dry photographic developing composition containing antioxidant
Dual drive co-axial disperser
Impulse detection and reduction in a frequency modulation radio receiver
Long chained beta glucan isolates derived from viscous barley grain, and the process of making
Photovoltaic cell system and an optical structure therefor
Vehicle fuel theft prevention assembly
Coupler for use in an oil cooling system
Guided wave pipeline inspection system with enhanced focusing capability
Storage system
Sample and hold demodulator with feedback for reduced riffle