| 摘要 |
Apparatus for replacing buried pipe includes a body including a first cylindrical portion having a diameter small enough to fit within an existing pipe, a second cylindrical portion having a larger diameter than the first cylindrical portion and sufficient to enclose a replacement pipe, and a frustro-conical portion joining the first and second cylindrical portions. The bursting head includes protrusions extending along the first cylindrical section, the frustro-conical section, and at least partially along the second cylindrical section. The protrusions are tapered such that at the narrowest point they may fit within an existing pipe and at the widest point will extend outward beyond the second cylindrical portion of the body. A replacement pipe is attached to the head and the head is drawn through an existing pipe. The protrusions break up the existing pipe and break up the surrounding earth to facilitate the passage of the head.
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