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
Herbicide composition having improved effectiveness, method of preparation and use
Dual-leadframe multi-chip package and method of manufacture
Implant free extremely thin semiconductor devices
Sensor system
Universal data-driven computer proxy
Defect detection system and method
Termite tubing preventative for non-wood materials
  Randomly Featured Patents
Reloadable cassette
Cassette using tape-marking elements
Tool for fixation of cable or line
Method for producing L-lactic acid with high optical purity using bacillus strains
Adhesive connection between the marginal area of a glass pane and a window frame
Integral master system for monitoring food service requirements for compliance at a plurality of food service establishments
Articles including thin film monolayers and multilayers
Method and device for manufacturing a tubular lithographic printing blanket
Television receiver
Interferometer apparatus and method for determining the spatial relationship of two or more objects