Device for cutting loose hard ground material
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United States of America Patent
Stats
-
May 27, 1980
Grant Date -
N/A
app pub date -
Mar 8, 1978
filing date -
Mar 8, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Hard ground beneath a water surface is controllably cut away by a device ch includes a buoyant body having a work support depending therefrom and forced against the hard ground so as partially to support the weight of the body. A cutter assembly is releasably clamped to the work support and the clamp has arms connecting it to a short, rigid carrier which mounts a rotatable cutter head at one end. The arms allow the carrier to swing about a horizontal axis and a vertical axis and hydraulic motors are provided to sweep the carrier about such axes in controlled fashion. A winch on the body allows the carrier to be clamped at desired vertical positions on the work support.
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