Reamer apparatus for ground boring machine

Details Reamer apparatus for ground boring machine Reamer apparatus for ground boring machine

2006-10-31

2006-10-31

Bagnell, David (Department: 3672)

Boring or penetrating the earth

Enlargement of existing pilot throughbore requiring...

C175S406000, C405S184100

Reexamination Certificate

active

07128168

ABSTRACT:
The invention provides a reamer apparatus for a ground boring machine that is capable of restricting increase in drawing resistance when performing drawing of a buried pipe by using a reamer and of efficiently performing drawing operations of the buried pipe without degrading properties such as flexibility and rotatability. The reamer apparatus includes a reamer main body of substantially hollow conical shape that reduces in diameter towards a drawing side, and a rod connecting portion that provided at a narrow diameter end portion of the reamer main body and connected with a rod. The reamer main body is connected to a buried pipe through a coupling structure disposed on an opposite side to the rod connecting portion. The coupling structure has a Swivel joint that allows rotation of the reamer main body with respect to the buried pipe, wherein a main portion of the Swivel joint is substantially accumulated in the reamer main body.

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