E - Fixed Constructions – 02 – D
Patent
E - Fixed Constructions
02
D
61/89
E02D 7/08 (2006.01)
Patent
CA 1158055
ABSTRACT OF THE DISCLOSURE A device in pile driving machines including a drop hammer which drives down piles into the ground. The problem of preventing crushing and breaking damages to the piles is solved in accordance with the invention in that the drop hammer consists of two or several superposed weight segments arranged, against the action of spring members to be drawn together as a result of their velocity energy when hitting the pile. The velocity energy is adjustable by control of the bias of the spring members with the aid of connecting rods passing through the weight segments.
386158
Fetherstonhaugh & Co.
Goteborgs Betongpdlar Ab
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