Cutting bit and compact
AssigneeChina Pacificarbide, Inc.
InventorRonald D. Mills
Life of this patent
Estimating the term…
Abstract
A replaceable cutting bit for insertion in a bit holder. The cutting bit includes a carbide ballistic compact having polycrystalline diamond layer brazed into a cavity defined in a protective ring. The cutting bit further includes a steel base having a hexagonal portion adapted for engagement with a wrench of other tool. The steel base defines a cavity into which a first hardened washer coated with abrasion resistant material is provided. The cutting bit further includes a second hardened washer coated with abrasion resistant material that is adapted to rotate relative to the first washer when the cutting bit is in operation in a bit holder.
Claims16
A cutting bit comprising:
- a base protective ring having a top portion and a bottom portion;
- a top protective ring coupled to the top portion of the base protective ring;
- a compact provided in a cavity of the top protective ring;
- and
- a cutting bit holding assembly coupled to the bottom portion of the base protective ring, the cutting bit holding assembly comprising a baseplate provided around a top portion of a central shaft, with a cavity defined in a bottom portion of the baseplate;
- a first washer provided in the cavity and around the top portion of the central shaft;
- and
- a second washer provided around the central shaft;
- wherein the second washer is rotatable or spinnable relative to the first washer.
A cutting bit comprising:
- a top protective ring coupled the top portion of a rumbler shank;
- and
- a compact provided in a cavity of the top protective ring;
- wherein the rumbler shank comprises a holding assembly having a central shaft and a baseplate.
Dependencies are inferred from the claim text.