Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and device for controlling the trajectory of a shield-type tunnelling machine










Image Number 6 for United States Patent #4904115.

Method of controlling the trajectory of a shield-type tunnelling machine equipped with displacement control hydraulic rams (3), characterized in that, these rams being divided into at least three groups of rams (6A, 6B, 6C), the theoretical instantaneous flowrates of fluid to be applied to each of these groups are continuously determined (40) from the curvature characteristics and the overall rate of advance set point trajectory and these groups (7-26-27-28) are supplied with instantaneous flowrates, the values of which correspond to the theoretical values.








 
 
  Recently Added Patents
Semiconductor device having a triple gate transistor and method for manufacturing the same
Distortion compensation device, distortion compensation method, and radio transmitter
Portable communication terminal, communication method and control program
Escutcheon
Treatment of influenza
Selected alert delivery in a distributed processing system
Plants and seeds of hybrid corn variety CH979678
  Randomly Featured Patents
Multiple control standard for blood analysis
Automatic coordinate determining device
Method for using gel package structure enhancing thermal dissipation between compressed printed circuit board and heat sink mechanical stiffener
Cable connector
Open cable set-top box diagnosing system and method thereof
Collectable card-based game in a massively multiplayer role-playing game that dynamically filters player communications
Piezoelectric thin film resonators
Method and apparatus for backspill prevention
Apparatus and method for unilateral topology discovery in network management
Filter sealing apparatus