Rolling assembly and pick assembly mounted on a trencher
OwnerDavid R. Hall, Ronald Crockett +1inventors
InventorsDavid R. Hall, Ronald Crockett, Sigmar Tobias
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Abstract
In one aspect of the present invention, a roller assembly on an excavator for degrading natural and man-made formations has a plurality of pointed inserts disposed along its outer diameter. The inserts have a tip adapted to impact the formation and at least one of the tips has polycrystalline diamond bonded to a cemented metal carbide segment. The diamond also has a substantially conical geometry with a 0.50 to 0.200 inch radius and a thickness greater that 100 inches at the apex. The diamond also has a volume that is 75 to 150 percent of a volume of a carbide substrate.
Claims19
A excavator for degrading natural and man-made formations, comprising:
- a roller assembly comprising a plurality of pointed inserts disposed along an outer diameter;
- at least one of the inserts comprising a tip adapted to impact the formation;
- at least one of the tips comprising polycrystalline diamond bonded to a cemented metal carbide segment;
- the diamond comprising a substantially conical geometry with a 0.50 to 0.200 inch radius and comprising a thickness greater than 0.100 inches at an apex;
- and
- the diamond also comprising a volume that is 75 to 150 percent of a volume of the carbide segment.
Dependencies are inferred from the claim text.