Boring head

Details Boring head Boring head

1981-05-27

1983-08-23

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175 53, 384 95, E21B 1022, F16C 1940, F16C 1949

Patent

active

043998798

ABSTRACT:
A boring head for reaming a pre-drilled hole in raise boring or for similar earth cutting operations comprising a plurality of roller cutters (13, 14), each of which being rotatably journalled over a bearing system. The bearing system comprises a split roller bearing (60) having axially spaced rollers (62, 63) which are separated by a loose guide ring (69).

REFERENCES:
patent: 2047112 (1936-07-01), Reed
patent: 3612197 (1971-10-01), Motoyama
patent: 4142598 (1979-03-01), Maxsted
patent: 4213656 (1980-07-01), Olschewski et al.
patent: 4258806 (1981-03-01), Kunkel et al.

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