Internal hydraulic pipe pushing apparatus

Details Internal hydraulic pipe pushing apparatus Internal hydraulic pipe pushing apparatus

1990-07-16

1991-12-03

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Pipe or rod jack

Tie rod tensioner

29234, B23P 1904

Patent

active

050694260

ABSTRACT:
A hydraulic apparatus for pushing pipe into an underground pipe comprises a hydraulic cylinder mounted on two longitudinally spaced sets of three radially extending, equally spaced legs. The legs have adjustable locking devices for locking the hydraulic cylinder in place as required inside the one part of an underground pipe. The hydraulic cylinder also has a lock plate of a length longer than the diameter of the underground pipe which acts to anchor the hydraulic cylinder in place when the hydraulic cylinder is activated. The apparatus has a head or push plate attached to a ram or piston extending from the hydraulic cylinder and a hydraulic control valve controlling actuation of the cylinder. With the two sets of legs attached, the hydraulic cylinder is placed inside one part of an existing underground pipe which is near the part in need of repair and the legs adjusted to center the cylinder in place. The lock plate presses against the end of the underground pipe in which the cylinder is secured. The push plate contacts the end of the section of pipe which is to be pushed into the existing underground pipe in need of repair. The hydraulic cylinder is activated by the control valve and the ram and push plate push the repair pipe into the existing underground pipe.

REFERENCES:
patent: 2615413 (1952-10-01), Adams et al.
patent: 4082248 (1978-04-01), Hinrichsen
patent: 4815695 (1989-03-01), Akesaka

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