Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1987-05-18
1988-08-02
Massie, IV, Jerome
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175 53, 175364, E21B 1010, E21B 1020
Patent
active
047608900
ABSTRACT:
A cutter assembly for rotary boring of earth. The assembly comprises a rotating cutter having a shaft protruding from the ends of the cutter; and a mounting member for the rotating cutter. The mounting member comprises two legs the ends of which are provided with counter surfaces for the ends portions of the shaft. The assembly further comprises fastening elements provided with a counter surface, the fastening elements being fitted at the ends of the legs for fastening the shaft to the mounting member. In order to provide a self-adjusting and reliable assembly which prevents the turning movement of the shaft, the curvature of the middle portion of the counter surface of the fastening element is so formed that a gap narrowing in the direction of the periphery of the shaft is defined between the shaft and the middle portion of the counter surface of the fastening element. A clutching part extending in the radial direction is arranged at the end of the shaft. When the shaft turns, the clutching part is pressed against the counter surface, thus preventing the turning of the shaft in this direction.
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Dang Hoang C.
Massie IV Jerome
Tamrock Inc.
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