Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Tunnel excavating machine










Image Number 3 for United States Patent #6644754.

A tunnel excavating machine having an excavating machine body can be moved forward by shield jacks. A rotatable cutter head is mounted in a front portion of the excavating machine body. An erector device for assembling segments in a ring form is mounted in a rear portion of the excavating machine body. A rest extends rearward from the rear portion of the excavating machine body. A shape retainer for making pressurized contact with inner peripheral surfaces of the assembled segments to retain the segments in a predetermined shape is supported on the rest so as to be movable along a fore-and-aft direction. Also, a revolving frame is located between the erector device and the shape retainer, and supported on the rest so as to be movable along the fore-and-aft direction such that the revolving frame does not interfere with the erector device and the shape retainer. A cage is supported on the revolving frame so as to be revolvable in a circumferential direction of an existing tunnel.








 
 
  Recently Added Patents
Communication apparatus, communication method, and program for exchanging data with a target
Cache memory control device, semiconductor integrated circuit, and cache memory control method
Semiconductor device
Light modulators and optical apparatuses including the same
Compositions and methods for inhibition of MMP13:MMP-substrate interactions
Control of protein activity using a conducting polymer
Stable file system
  Randomly Featured Patents
Optical disc system and method for controlling movement of an optical pickup to an innermost perimeter of an optical disc using track information
Method and apparatus for removing earthworms from soil using electric pulses
Door guard
Ion source, ion implantation apparatus, and ion implantation method
Ultrasonic transceiver and remote controlled devices for pets
Hydroxyalkanyl amides as modulators of chemokine receptor activity
Cationic polymerizable resin composition
Beam steering controller for a curved surface phased array antenna
Wide-range clock multiplier
Plants and seeds of corn variety CV350669