Grooving bucket

Details Grooving bucket Grooving bucket

1974-11-07

1976-04-27

Purser, Ernest R.

Boring or penetrating the earth

Cutter element laterally shiftable below ground

With shifting mechanism spring biased to operative position

61 536, E21B 926

Patent

active

039528189

ABSTRACT:
A grooving bucket for forming grooves or bells in the ground around a previously drilled hole to allow casting of a concrete pile, the grooving bucket consisting of a cylindrical bucket portion fitted at the upper end with a boot or connecting box to fit the appropriate drilling machine kelly bar. Pivoted cutter arms protrude from each side of the bucket and are held in the horizontal or cutting position preferably by heavy duty tension springs. The cutters are hollow or channeled and are angled to cut a groove or bell in the ground on rotation of the bucket and to lead spoil or rock cuttings into the interior of the bucket. The bucket may be provided with a bottom hinged door to facilitate removal of spoil from inside the bucket.

REFERENCES:
patent: 165376 (1875-07-01), Summers
patent: 1133398 (1915-03-01), Pippin
patent: 2228709 (1941-01-01), Ruddell et al.
patent: 2585369 (1952-02-01), Caruthers
patent: 2621898 (1952-12-01), Brodhead et al.

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