High Temperature Rock Drill (U.S. Patent 3,357,505)

Government Record · Tier 1 — Primary Document · D. E. Armstrong et al.; U.S. Atomic Energy Commission · December 12, 1967

A 1967 Atomic Energy Commission patent, filed in 1965, for a high temperature rock drill with a heated tungsten shoe, built for drilling holes in the earth. It discusses the energy needed to melt rock.

This invention describes an apparatus for drilling holes in the earth.

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A 1967 Atomic Energy Commission patent, filed in 1965, for a high temperature rock drill with a heated tungsten shoe, built for drilling holes in the earth. It discusses the energy needed to melt rock.

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