Earth boring system

Details Earth boring system Earth boring system

2007-11-13

2007-11-13

Bagnell, David (Department: 3672)

Boring or penetrating the earth

With below-ground tool drive prime mover

Plural below-ground drive prime movers

C175S086000, C175S099000, C175S094000, C299S013000

Reexamination Certificate

active

10994200

ABSTRACT:
An earth boring apparatus for sinking shafts and removing shaft material from the shaft, the apparatus having at least two decks; hydraulic means for allowing movement of the decks relative to one another; releasable anchoring means associated with the decks for engaging walls of the shaft to secure the apparatus in a stationary position; whereby the releasable anchoring means of one of the decks engages the wall while the releasable anchoring means of the other deck is released from the wall to allow motion of the other deck along the shaft, in cooperation with the hydraulic means. The apparatus also includes guide means for forcing a bucket for hoisting shaft material from the shaft along a predetermined path, and an in-stage cut-boom drill.

REFERENCES:
patent: 3965995 (1976-06-01), Sugden
patent: 4141414 (1979-02-01), Johansson
patent: 4274675 (1981-06-01), Paurat et al.
patent: 4589502 (1986-05-01), Salter et al.
patent: 4646853 (1987-03-01), Sugden et al.
patent: 4732226 (1988-03-01), Ebeling et al.
patent: 03-241192 (1991-10-01), None
patent: 03-241193 (1991-10-01), None
patent: 11-200763 (1999-07-01), None
patent: WO 8905391 (1989-06-01), None

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