Pipe for pipe jacking

Details Pipe for pipe jacking Pipe for pipe jacking

1991-01-24

1992-03-24

Bryant, III, James E.

Pipes and tubular conduits

Distinct layers

With intermediate insulation layer

138109, F16L 1102

Patent

active

050978713

ABSTRACT:
In pipe jacking wherein a pipe line is formed by horizontally inserting pipes one by one from a vertical pit without moling the ground, a pipe of spigot and socket type to be used is coated with such material as concrete to form an uniform common external diameter from a flange section with its external diameter enlarged to a spigot section, a pipe whose external surface is covered with another smooth outer pipe so as to make the external surface smooth and reduce frictional resistance is provided.

REFERENCES:
patent: 3279003 (1966-10-01), Yates
patent: 3516447 (1970-06-01), Pittman
patent: 3864908 (1975-02-01), LaHaye
patent: 4114657 (1978-09-01), Longenfeld
patent: 4240470 (1980-12-01), McPherson et al.
patent: 4345625 (1982-08-01), Mayumi et al.
patent: 4361336 (1982-11-01), Rech et al.
patent: 4432396 (1984-02-01), Dausson et al.
patent: 4778202 (1988-10-01), Schulke

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