Cube X Incorporated

Mauro F. Dobran

Dino L. Ryan

Kerry C. Willett

Dino L Ryan

Mauro F Dobran

Kerry C Willett

A rock drill bit comprising a main body arranged to drill at the end of a shaft of the drilling assembly, the main body having a diameter larger than that of the shaft, a front face on the main body arranged to engage an area for drilling and an outer surface extending rearwards from the front face. A flush channel extends through the main body to the front face and at least one open end of the flush channel at the front face is arranged to provide a fluid to an area at the front face. A plurality of contact points on the front face for engaging the area. A flush groove extends from the open end of the flush channel outwards to the outer surface and at least one relief bore extends from the front face rearwards to a relief area behind the outer surface for providing a release for the fluid from the front face to the relief area. The relief bore is located within the flush channel between the open end and the outer surface such that the debris is flushed from the drilling area to an area behind the main body.

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CA

Dino L Ryan