Rotatable cutting bit shield

Details Rotatable cutting bit shield Rotatable cutting bit shield

1985-08-06

1987-04-28

Novosad, Stephen J.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

299 86, 29520, E21C 2512, E21C 3518

Patent

active

046608907

ABSTRACT:
A rotatable cutting bit shield and method and apparatus for attaching the shield onto cylindrical cutting bit shafts uses an annular metal ring having the shape of an inverted dish, and a centrally located hole through the ring. The diameter of the hole is initially larger than the diameter of the cutting bit shank. Compressive pressure exerted on the annular upper and lower faces of the ring by the apparatus according to the method causes the ring to deform into a flatter, more disc-shaped structure. This deformation causes the diameter of the central hole in the ring to shrink, captivating the ring axially between larger diameter annular flanges on the cutting bit shank.

REFERENCES:
patent: 3331637 (1967-07-01), Krekeler
patent: 3342531 (1967-09-01), Krekeler
patent: 3512838 (1970-05-01), Kniff
patent: 3746396 (1973-07-01), Radd
patent: 3778112 (1973-12-01), Krekeler
patent: 3841708 (1974-10-01), Kniff et al.
patent: 4201421 (1980-05-01), Den Besten
patent: 4470210 (1984-09-01), Hahn
patent: 4489986 (1984-12-01), Dziak
patent: 4561698 (1985-12-01), Beebe

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