Invention Grant
US08640786B2 Percussive augmenter of rotary drills for operating as a rotary-hammer drill 有权
旋转钻机的冲击增强器作为旋转锤钻机操作

Percussive augmenter of rotary drills for operating as a rotary-hammer drill
Abstract:
A percussive augmenter bit includes a connection shaft for mounting the bit onto a rotary drill. In a first modality, an actuator percussively drives the bit, and an electric slip-ring provides power to the actuator while being rotated by the drill. Hammering action from the actuator and rotation from the drill are applied directly to material being drilled. In a second modality, a percussive augmenter includes an actuator that operates as a hammering mechanism that drives a free mass into the bit creating stress pulses that fracture material that is in contact with the bit.
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