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
Light-emitting device package structure
Multi-wired antenna for mobile apparatus
Method for the analysis of solid objects
Monitoring heap in real-time by a mobile agent to assess performance of virtual machine
Managing aging of silicon in an integrated circuit device
Display screen or portion thereof with icon
Business flow processing method and apparatus
  Randomly Featured Patents
Method and apparatus for transmitter for universal garage door opener
Putter blade
Poly(arylene sulfide) coating compositions containing polyoxyethylated vegetable oil
Electrophotographic photoreceptor containing asymmetrical naphthalenetetracarboxylic acid diimide derivatives and electrophotographic imaging apparatus employing the photoreceptor
Door stop
Automatic control channel planning in adaptive channel allocation systems
Logic analyzer probe assembly with probe and interface boards
Five-layered, biaxially-oriented, sealable tubular film for the packaging and wrapping of paste-like foodstuffs meat and meat with bones and use thereof
Inductive coupling data send/receive circuit
Accessing different application data via a common data structure