Pulling device and method therefor
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United States of America Patent
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Jul 2, 2013
Issued Date -
N/A
app pub date -
Sep 16, 2009
filing date -
Sep 16, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A puller is provided with a number of advantages. Pullers are described that have a high power to weight ratio, and a high power to volume ratio. Examples of pullers and pulling systems include configurations that provide high cable friction in a small device volume. Examples of pullers and pulling systems also include constant force pulling which is desirable in particular for small diameter pipe replacement. Using pullers and pulling systems as described, minimally invasive pipe replacement operations are possible. Reversible pullers are also provided that decrease the amount of time needed to burst or split multiple segments of pipe.
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