Piling hammer

Details Piling hammer Piling hammer

1986-02-20

1989-02-07

Kazenske, E. R.

Tool driving or impacting

Processes

173 2, 173115, 173139, B21J 706

Patent

active

048025380

ABSTRACT:
A hammer for driving a pile into the ground has a cylindrical barrel and an anvil sealed to an end of the barrel, a hammer piston mounted for reciprocation within the barrel towards and away from the anvil, hydraulic cylinders to lift the hammer piston away from the anvil, and a switch, responsive to an increase in fluid pressure in the space between the hammer piston and the anvil, to activate the lift means. The invention includes a method of driving a pile into the ground, in which the pile-driving impact is transmitted to the pile via a confined quantity of hydraulic fluid and the weight by which the impact is applied is lifted, to a position from which to apply a further impact, in response to an increase in pressure in the hydraulic fluid.

REFERENCES:
patent: 3721095 (1973-03-01), Chelminski
patent: 3744578 (1973-07-01), Lisenby
patent: 3797585 (1974-03-01), Ludvigson
patent: 4109621 (1978-08-01), Hashimoto et al.
patent: 4580640 (1986-04-01), Boldt
patent: 4660655 (1987-04-01), Wilner

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