Patent ID: 9605538
Date: 2017-03-28
CPC Classifications: B23K,E21C

Claim:
1. A cutting pick tool comprising: a central axis; a cutting tip of a diamond composite, the tip having an axially forward region including a first conical external surface and a mount portion extending axially rearward toward the central axis, the mount portion including a substantially planar end surface, wherein a first annular curved section forms a junction between the planar end surface and a second conical external surface of the mount portion; and a cemented carbide support body having an axially forward rim and an axially rearward region mounted at a pick body, the support body including an outer surface that extends axially rearward from the forward rim and a recess also extending axially rearward from the forward rim, the mount portion being received and mated within the recess, the recess being defined by a conical sidewall that tapers radially inward in a direction from the forward rim to the rearward region and towards the central axis, an axially rearwardmost region of the recess being defined by a substantially planar base surface, the planar base surface being bordered at its perimeter by a second annular curved section that forms a junction with the conical sidewall, the mount portion having a truncated conical shape profile that is complementary to a profile of the recess to seat the mount portion within the recess, the first annular curved section of the mount portion corresponding to the second annular curved section of the recess and the second conical external surface and planar end surface of the mount portion being arranged in close touching contact with the conical sidewall and the planar base surface of the recess respectively, such that approximately half or just less than half of a volume of the cutting tip is accommodated within the recess, wherein the first external surface of the cutting tip is substantially coplanar with the outer surface of the support body.