Rotary percussion bit

Details Rotary percussion bit Rotary percussion bit

1979-06-06

1981-11-10

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

175415, E21B 936

Patent

active

042992974

ABSTRACT:
A rotary percussion bit comprising a shaft, a plate-like member secured to one end of the shaft, a plurality of relatively distributed, raised sections on one surface of the plate-like member, the raised sections containing a plurality of raised cutting elements, a plurality of projecting ribs around the rim of the plate-like member, and a plurality of exhaust holes through the plate-like member. The raised sections comprise rings projecting from the surface of the plate-like member and filler material disposed within the rings, the cutting elements being disposed in the filler material.

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patent: 3355215 (1967-11-01), Haspert et al.
patent: 3382940 (1968-05-01), Stebley
patent: 3460867 (1969-08-01), Cameron et al.
patent: 3696734 (1972-09-01), Richmond

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