Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Apparatus for and a method of tunnelling










Image Number 3 for United States Patent #4084386.

A drive shield of a tunnelling apparatus has elongate drive members supported and guided for longitudinal movement in a manner known per se. The drive members are connected to rear members or tails forming a rear shield and fluid concrete is introduced into a reception space within the rear shield to create a permanent lining for the tunnel. The rear members are shaped or profiled to provide recesses which are closed-off over a certain zone with the aid of covers. Reinforcing bars or the like can be inserted into the recesses to become cast into the concrete lining and means for delimiting the front end of the concrete reception space, such as a ring component, engages on the covers which form a smooth continuous bearing surface therefor.








 
 
  Recently Added Patents
Method and apparatus for managing backup channel in multi-channel environment
Wrench
Liquid crystal shutter glasses
Vehicle driving assistance apparatus
Sperm factor sequences
Security patch update processor
Control apparatus for autonomous operating vehicle
  Randomly Featured Patents
Method of operating cordless telephone system
Luminescent device having thin film transistor
Process for the treatment of dyed cellulosic fiber material
Iron type golf club head with an integral sighting means
Haptic feedback device and electronic device having the same
Keyed electrical connector with sealing boot
Automobile tire
Method and apparatus for inserting sheet piles within highly resistant earth formations
Ion sources
Power factor correction system