Rotary cutter assembly

Details Rotary cutter assembly Rotary cutter assembly

1985-04-15

1986-12-23

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175374, F21B 1020

Patent

active

046306935

ABSTRACT:
A rotary cutter assembly employs a wear sleeve to improve the durability of the drill head and to seal off a fluid passageway in the shank of a drill bit which is mounted to the drill head. The shank of the drill bit is releasably secured to the drill head by means of lock pins received in intersecting complementary longitudinally and transversely extending grooves. A lock ring is also employed to axially secure the drill bit to the drill head.

REFERENCES:
patent: 2065743 (1936-12-01), Reed
patent: 2648526 (1953-08-01), Lanchester
patent: 3921734 (1975-12-01), Goodfellow
patent: 4036313 (1977-07-01), Dixon et al.
patent: 4036314 (1977-07-01), Dixon et al.
patent: 4202418 (1980-05-01), Waddell

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