Bit holder with a detachably fixed bit bushing

Details Bit holder with a detachably fixed bit bushing Bit holder with a detachably fixed bit bushing

1994-11-09

1996-03-12

Dang, Hoang C.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Cleansing fluid passage

175413, 299106, B23B 3110

Patent

active

054980690

ABSTRACT:
The bit holder (1) is nonpositively connected to a bit bushing (3) with adherence to a pressure per unit of surface area of >100N/mm.sup.2 between the conical outer surface of the bit bushing (3) and the inner wall of the receiving bore (2) of the bit holder (1). After the bushing has been driven into the receiving bore (2), the conical outer surface of the bit bushing (3), formed by rectilinear generatrices, protrudes beyond the bore (2) by an excess amount (a).

REFERENCES:
patent: 3499685 (1970-03-01), Kniff
patent: 3841707 (1974-10-01), Kniff et al.
patent: 4247150 (1981-01-01), Wrulich et al.
patent: 4333687 (1982-06-01), Barnstorf
patent: 4337980 (1982-07-01), Krekeler
patent: 4678238 (1987-07-01), Emmerich
patent: 5088797 (1992-02-01), O'Neill
patent: 5370448 (1994-12-01), Sterwerf, Jr.

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