Cutter mounting extension apparatus

Details Cutter mounting extension apparatus Cutter mounting extension apparatus

1975-11-05

1977-09-20

Purser, Ernest R.

Boring or penetrating the earth

Bit or bit element

Noncutting portion forwardly of cutting portion

175 53, 175384, 175391, E21B 922

Patent

active

040490670

ABSTRACT:
The apparatus comprises means for coupling to a standard raise boring head for extending the radius of the head. The apparatus comprises a support which is bolted or welded to a terminal end of the raise boring stem and to the underlying surface of the principal cutter bracket mounting platform of the head, and the support has means for selectively coupling thereto cutter mounting extension elements each of which comprise ancillary cutter bracket mounting platforms.

REFERENCES:
patent: 2745650 (1956-05-01), Smith
patent: 2818242 (1957-12-01), Smith
patent: 2887300 (1959-05-01), Meredith
patent: 3659659 (1972-05-01), Lichte
patent: 3659660 (1972-05-01), Conn
patent: 3858667 (1975-01-01), Goodfellow
patent: 3902562 (1975-09-01), Pessier et al.
patent: 3917009 (1975-11-01), Dyer
patent: 3921734 (1975-11-01), Goodfellow

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