Device for transferring an impact to an elongate member

Details Device for transferring an impact to an elongate member Device for transferring an impact to an elongate member

B - Operations, Transporting

25

D

138/40.14

B25D 9/12 (2006.01) E02D 7/08 (2006.01) E02D 7/14 (2006.01) E02D 13/10 (2006.01)

Patent

CA 1048896

A PILE DRIVING DEVICE Abstract of the disclosure A gas cushion impact cap, used in connection with pile driving, is connected to an external pressure chamber holding an additional volume of gas, whereby there will be no appreciable change in the gas pressu- re during the impact. The gas pressure is primarily determined by varying the volume of a liquid contained in the pressure chamber, in response to the resistance met by the pile while penetrating the ground. The impact cap may be pre-loaded during an upwards movement, the pre-load being released upon the impact, to throw the hammer up- wards again.

272230

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