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5330011 |
A free fall stroker for raising and dropping a drop hammer for soils bearing testing or the like includes a housing through which a drop hammer cable extends from one side to the bottom thereof. A pair of guide pulleys guide the cable th...
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5107934 |
A relatively simple pile driver includes a tubular holder with a closed top end and an open bottom end for receiving a pile; a tubular hammer with a closed bottom end and an open top end, the hammer containing lead and being mounted on t...
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4993500 |
An automatic drive hammer system includes an automatic drive hammer apparatus which is carried by a bucket pivotally mounted to a drill rig. The drive hammer apparatus may be pivoted in the bucket from an off-hole storage position to an ...
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4291780 |
A mobile generator for producing seismic waves in the ground, which includes a mobile four-sided frame, a boom having its lower end pivotally connected to the frame, and a worm gear mounted on the frame such that by rotating the worm gea...
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3768575 |
There is disclosed herein a sectional lead for a pile driver apparatus. The lead is of skeletal truss construction having parallel corner members providing front guideways for the pile driver and rear guideways for slides carried by a bo...
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3750765 |
A pile driving rig mounted on a free standing transportable frame. A sound reducing casing is provided on the frame which comprises a chamber for enclosing a pile driving means and all of a pile above ground. An aperture is provided in t...
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