Pile driving

Details Pile driving Pile driving

1977-05-10

1978-10-24

Hafer, Robert A.

Tool driving or impacting

Impacting devices

Impact transmitting anvil

173103, 173139, B25D 900

Patent

active

041216717

ABSTRACT:
Disclosed is an apparatus for increasing the effectiveness of hammer-type pile drivers by making possible the use of higher hammer velocities without damaging the pile or the equipment. The apparatus includes a pair of aligned cylinders of unequal diameter, the smaller of which contains an anvil piston and the larger of which contains a driving piston, connected to a pile cap engageable with a pile. Means are provided for applying a deadweight load to the apparatus and for maintaining the space lying between the pistons full of liquid. In addition to enabling use of higher hammer velocities, the apparatus effectively incorporates the deadweight load into driving force when the hammer strikes.

REFERENCES:
patent: 3205790 (1965-09-01), Bollar
patent: 3498391 (1970-03-01), Guild et al.
patent: 3797585 (1974-03-01), Ludvigson

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