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
Plants and seeds of corn variety CV778791
Fabric-backplane enterprise servers with pluggable I/O sub-system
Host route convergence based on sequence values
Basket for a dishwasher
Mobile device mode control based on dual mapping of availability (presence) information
Method and system for network configuration for virtual machines
Method and system for encrypting data in a wireless communication system
  Randomly Featured Patents
Distributor device for a ventilation system in a vehicle
Conduit piece for the absorption of foreign bodies
Medical timing system for use during pregnancy and method of using same
Apparatus and method for partitioning and managing subsystem logics
R-T-B rare earth sintered magnet having improved squareness ratio and method for producing same
Delay-locked loop and a method of testing a delay-locked loop
Method for inputting and acquiring requirement
Method for treating fecal incontinence
Loudspeaker system
Magnetic recording medium with laser-formed differential zone lubrication