Device for forming underground pipelines

Details Device for forming underground pipelines Device for forming underground pipelines

1978-02-17

1980-01-01

McQuade, John

Plastic article or earthenware shaping or treating: apparatus

Utilizing subterranean feature as shaping means

425 95, 425262, 425290, 425460, B28B 2142

Patent

active

041814843

ABSTRACT:
Apparatus for building underground pipelines by forming a casing in a hole from a forming material which is compacted in the direction from the center of the hole towards its walls. The hole is first filled with the forming material throughout its cross-sectional area and then the material is compacted in the direction towards the walls of the hole. Compaction is effected by a device comprising a rod-shaped body adapted for moving through the hole, the front end of the body being provided with a system of radial ribs.

REFERENCES:
patent: 618418 (1899-01-01), Keyes
patent: 1867837 (1932-07-01), Jackson
patent: 3723041 (1973-03-01), Brown
patent: 3886242 (1975-05-01), McGregor

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