Shock absorbing apparatus and method for a vibratory pile driving machine
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United States of America Patent
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Jun 2, 1992
Issued Date -
N/A
app pub date -
Jan 16, 1990
filing date -
Jan 12, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A shock absorbing apparatus for a vibratory pile driving/pulling device having a base section connected to a vibrating device, a connecting section connected to a carrying member such as a lifting cable and an intermediate section operatively connecting the base section and the connecting section. First shock absorbing members are provided for resisting force of relatively small magnitude between the base section and the intermediate section and second shock absorbing members are provided for resisting force of relatively greater magnitude between the intermediate section and the connecting section. A limit stop is provided to limit the relative vertical displacement between the base section and the intermediate section such that the second shock absorbing members absorb much of the load when the apparatus is under a substantial external load.
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