Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and apparatus for producing underground pipes










Image Number 2 for United States Patent #4647256.

A method of producing underground pipes, with pipe sections being pressed ahead into the ground. For each pipe section, at least two partial pipe shells are used which are separated from one another in the longitudinal direction, and are joined about supply lines which are guided through the pipe. The joining process is effected before the pipe section is pressed into the ground. With this method, the supply lines do not have to be interrupted when a new pipe section is introduced. The apparatus for carrying out the method is provided with at least one joining station for joining the partial pipe shells in a precisely fitting manner, and a combining station for interconnecting the partial pipe shells.








 
 
  Recently Added Patents
System and method for associating financial transaction data with a user's project data using a portable electronic device
Energy storage device package
LED illumination control using a simple digital command structure
Circuit breakers
System for purifying air through germicidal irradiation and method of manufacture
Bacterial superantigen vaccines
Universal tablet and smartphone holder
  Randomly Featured Patents
Mapping highlight colors to black-and-white textures
Brunnera plant named `Emerald Mist`
Dissimilar metal joining method
Electrical connector apparatus for planar solid oxide fuel cell stacks
Adhesive composition and surface protection films produced therewith
Animal training system
Zwitterionic biscyclopentadienyl complexes
Quinoline derivatives for modulating DNA methylation
Oil cooler control
Unity for the emptying and refilling of gases of installations