Roller cutting tool with improved sealing
AssigneeSandvik Mining and Construction Tools AB
InventorsJoona Loikkanen, Anders Lindblom
Life of this patent
Estimating the term…
Abstract
A roller cutter for a drill head for raise boring. The roller cutter having a shaft with a longitudinal center line, a hub rotatably mounted on the shaft, and a seal retainer located between the axial ends of the hub and the shaft at least arranged at one end of the roller cutter. The seal retainer supports a primary cutter seal providing sealing between the shaft and the hub in both axial and radial directions. A secondary cutter seal is located between the seal retainer and the hub, such that the secondary cutter seal provides sealing in the axial direction.
Claims8
A roller cutter for a drill head for raise boring, the roller cutter comprising:
- a shaft with a longitudinal center line;
- a hub rotatably mounted on the shaft;
- a seal retainer located between axial ends of the hub, the shaft being arranged at at least one end of the roller cutter, the seal retainer supporting a primary cutter seal providing sealing between the shaft and the hub in both axial and radial directions, wherein the seal retainer includes a radially upward projecting region having an axially outermost end and an axially innermost end;
- and
- a secondary cutter seal located between the seal retainer and the hub, wherein the secondary cutter seal provides sealing in the axial direction, wherein a first surface of the secondary cutter seal is supported by an upper surface of the axially innermost end of the seal retainer and a second surface of the secondary cutter seal is supported by a side surface of the axially outermost end of the seal retainer, and wherein the side surface of the axially outermost end of the seal retainer includes a groove.
Dependencies are inferred from the claim text.