Apparatus and method for driving bulb piles

Details Apparatus and method for driving bulb piles Apparatus and method for driving bulb piles

1974-09-19

1976-02-17

Purser, Ernest R.

Tool driving or impacting

Processes

173 11, 173 87, 254173R, E21B 104

Patent

active

039385957

ABSTRACT:
Method and apparatus for forming piles in the earth with a pile hammer rig having a crane, a hoisting drum carried by the crane, a driving mechanism for driving the drum through a clutch assembly, a braking assembly for the drum, a hoisting rope leading from the drum for lifting a drop-weight, an automatic sensor for sensing the top of the drop-weight stroke for disengaging the clutch mechanism, a second automatic sensor for sensing the bottom of the drop-weight stroke for engaging the drum braking assembly, and in one form of the invention an automatic sensor for sensing the rotation of the hoisting drum for disengaging the braking assembly and engaging the clutch assembly.

REFERENCES:
patent: 2241274 (1941-05-01), Severson
patent: 3073124 (1963-01-01), Nadal

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