Driving tips for forming cast-in-place caseless concrete piles

Details Driving tips for forming cast-in-place caseless concrete piles Driving tips for forming cast-in-place caseless concrete piles

1975-07-18

1977-03-22

Gilliam, Paul R.

61 5352, E02D 572

Patent

active

040129152

ABSTRACT:
Driving tips for forming cast-in-place caseless piles by driving a vertically elongated mandrel having one of the driving tips releasably fitted on the bottom of the mandrel, to thereby produce the pile-forming hole in the earth to be filled with flowable concrete or other fill material. The driving tips have a lower leading end plate of circular cross-section of larger diameter than the mandrel, and include straight parallel rod members rising perpendicularly from the end plate paralleling the center axis of the end plate and located at circumferentially spaced locations along a circular path having a diameter slightly smaller than the inner diameter of the mandrel and concentric with said center axis, rods or cylindrical members to interfit in the hollow interior bore in the mandrel and thereby center the tip relative thereto.

REFERENCES:
patent: 262569 (1882-08-01), Case
patent: 903441 (1908-11-01), Brace
patent: 1275470 (1918-08-01), Pruyn
patent: 3034304 (1962-05-01), Upson
patent: 3540225 (1970-11-01), Muller
patent: 3638433 (1972-02-01), Sherard

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