Pick with a bearing
OwnerDavid R. Hall, Ronald B. Crockett +2inventors
InventorsDavid R. Hall, Ronald B. Crockett, Jeff Jepson, Francis Leany
Life of this patent
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Abstract
In one aspect of the invention, a degradation assembly comprises a holder. The holder is attached to a driving mechanism and comprises a longitudinal central bore. A pick comprises a body intermediate a shank and an impact tip, and the shank is disposed in the central bore of the holder. The impact tip comprises an impact surface diamond or cubic boron nitride. At least one rolling element is disposed intermediate an inner bore surface and the shank, and is adapted for low-friction rotation with respect to both the inner bore surface and the shank.
Claims15
A degradation assembly, comprising:
- a holder attached to a driving mechanism and comprising a longitudinal central bore;
- a pick comprising a body intermediate a shank and an impact tip, the shank being disposed in the central bore of the holder;
- the impact tip comprising diamond;
- and
- a bearing assembly with at least one rolling element disposed intermediate a central bore surface and the shank;
- wherein the shank is retained in the holder by a resilient keeper ring.
A pick holder, comprising:
- a longitudinal central bore with an opening at a distal end of the holder;
- an attachment to a driving mechanism at a proximal end of the holder;
- a bearing assembly disposed within the central bore;
- the bearing assembly comprising a plurality of rolling elements disposed intermediate an outer diameter and an inner diameter;
- wherein the bearing assembly is adapted to allow low-friction rotation with respect to the central bore of a shank disposed within the inner diameter;
- wherein the shank is retained in the holder by a resilient keeper ring.
A degradation assembly, comprising:
- a holder attached to a driving mechanism and comprising a longitudinal central bore;
- a pick comprising a body intermediate a shank and an impact tip, the shank being disposed in the central bore of the holder;
- the impact tip comprising a diamond or cubic boron nitride surface;
- and
- a bearing assembly disposed within the bore and around the shank;
- wherein the bearing assembly is adapted for low-friction rotation with respect to both the bore and the shank;
- wherein the shank is retained in the holder by a resilient keeper ring.
Dependencies are inferred from the claim text.