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
Synergistic welding system
Feature management of a communication device
Processes for producing caprolactam and derivatives thereof from fermentation broths containing diammonium adipate, monoammonium adipate and/or adipic acid
Refill container
Wireless field device with removable power source
Beverage dispenser
Solid-state imaging device, method of manufacturing the same, and electronic equipment
  Randomly Featured Patents
Systems for assessing and enhancing the performance of scanning probe microscopes by quantifying and enforcing symmetries and periodicities in two dimensions
Method for making non-dehiscent sesame
Methods of coating and surface finishing articles made of metals and their alloys
Label
Image forming apparatus with transfer material separating means
Seamed spacer sleeve for electrical connector housing
Unit for fixing and pivoting an optical assembly
Antisense modulation of PDK-1 expression
Portable fire hydrant lantern and nightlight
Remote drive with powershift transmission