Pipe burster

Details Pipe burster Pipe burster

1990-06-08

1991-10-08

Phan, Hien H.

Severing by tearing or breaking

Breaking or tearing apparatus

Web restrainer

138 97, F16L 5518

Patent

active

050546775

ABSTRACT:
A pipe burster for cracking gas and other pipes preparatory to inserting a replacement pipe in the passage so formed. The burster comprises an elongated body tapering in the lengthwise direction and made up first and second parts 2,14 extending in said direction. The parts are connected by a transverse pivot pin 20. The first part 12 is received within the second part and carries a piston and cylinder 22 by which the parts are separable. The circumference of the body is substantially a closed curve and within the length of the first part the circumference is increased by said separation. Therefor the burster makes a clearance by said separation into which the burster can be advanced. In a modification more than one piston and cylinder is provided.

REFERENCES:
patent: 4505302 (1985-03-01), Streatfield et al.
patent: 4928866 (1990-05-01), Carruthers

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