Drill bit

Details Drill bit Drill bit

1995-10-18

1997-08-12

Neuder, William P.

Boring or penetrating the earth

Bit or bit element

Core forming type

299107, B28D 114

Patent

active

056556136

ABSTRACT:
A drill bit is formed of an insertion end part (1) and carrier part (2) containing drilling cutter members (8). The insertion end part (1) and the carrier part (2) are joined together by a threaded connection. The two parts are secured by a radially flexible spring washer (7) for preventing an unintended detachment of the two parts.

REFERENCES:
patent: 4427326 (1984-01-01), Hobson et al.
patent: 4470735 (1984-09-01), Salisbury
patent: 5328311 (1994-07-01), Knohl
patent: 5352056 (1994-10-01), Chandler
European Search Report, No. EP 95 810 519.9 dated Mar. 4, 1996.

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