Resources Contact Us Home
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
Method and system of a sensor interface having dynamic automatic gain control
Firewall-tolerant voice-over-internet-protocol (VoIP) emulating SSL or HTTP sessions embedding voice data in cookies
Blueberry plant named `DrisBlueFour`
Down-drawable, chemically strengthened glass for cover plate
Adaptive frame scanning scheme for pulsed X-ray imaging
Methods and apparatus for monitoring communication through identification of priority-ranked keywords
Uplink synchronization management in wireless networks
  Randomly Featured Patents
Superpixel segmentation methods and systems
System and method for delay equalization of multiple transmission paths
Gaming machine with superimposed display image
Accessory for attenuated total internal reflectance (ATR) spectroscopy
Reclosable side-opening box
Method and apparatus for continuously coating discrete particles in turning fluidized bed
Angled slot foam dispenser
Case for portable electronic device
Path planning apparatus and method for robots
Self-lubricating device