Belling apparatus

Details Belling apparatus Belling apparatus

1975-05-14

1976-02-17

Leppink, James A.

Boring or penetrating the earth

With below-ground tool drive prime mover

With means to anchor prime movers support to bore wall

175102, 175267, 175310, E21B 308, E02D 1714

Patent

active

039385981

ABSTRACT:
The present invention relates to belling apparatus for forming a bell shaped recess at the lower end of a pier bore and is concerned primarily with such apparatus in which spoil generated by cutting the recess is continuously removed by an auger.

REFERENCES:
patent: 902517 (1908-10-01), Wittich
patent: 2000195 (1935-05-01), Siebel
patent: 2091779 (1937-08-01), Gooder
patent: 2250670 (1941-07-01), Joy
patent: 2769614 (1956-11-01), Zeni
patent: 2798707 (1957-07-01), Kandle

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