Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method of installing replacement pipe and apparatus therefor










Image Number 3 for United States Patent #6382877.

The invention concerns the replacement of underground pipes (52) wherein a former/cutting blade device (10) is pulled along the line of the existing pipe (52) by a cable fed (30) previously into the existing pipe (52). As the device (10) is so pulled it cuts and spreads the existing pipe (52). At the same time a new pipe (26) attached to the rear of the former (12) is pulled into place. The invention is of particular use in the replacement of small size lead water pipes which lead to consumer dwellings, and provides that the cable (30) which must be as large a diameter as possible to take the loads involved, is connected to the former (12) by having a ferrule (28) at one end which is located in a recess (27) in the former (12) so as not to interfere with the former profile. Also, the recess (27) is to the rear of the cutting blade (40) so that the ferrule (28) does not to cause an obstruction to the cutting operation.








 
 
  Recently Added Patents
Process and apparatus for producing composite material that includes carbon nanotubes
Method and apparatus for error correction in MBMS receipt system
Mono-body defibrillation probe
Wireless refrigerant scale platform
Method for isomerisation of hop alpha-acids using heterogeneous alkaline earth metal based catalysts
Resin composition and molded article
Image forming apparatus having a primary transfer unit, a secondary transfer unit, and a direct transfer unit
  Randomly Featured Patents
Electronic controller for automatic transmission
Preventing air film between web and roller
Tunable infrared detector with narrow bandwidth
Multichannel communication system with an amplifier in each channel
Spice grinder
Method and system for accessing a file
Non-aqueous polar aprotic peptide formulations
Laminate for making tubes
Foot mat
Use of pendant free-radically polymerizable moieties with polar polymers to prepare hydrophilic pressure sensitive adhesive compositions