Cuttable drilling tool, and a cuttable self drilling rock bolt
AssigneeSandvik Intellectual Property AB
InventorsJohn Horsch, Simon Daniel Hardwicke Knight
Life of this patent
Estimating the term…
Abstract
The present invention relates to a drilling tool incorporating first and second ends, a cuttable and/or processable shaft extending between the ends. The first end has a drill bit to penetrate rock. The drill bit and the shaft have complementary threads. The drill bit and the shaft comprise a relative rotation stop means that ensures that the drill bit remains loose during drilling in a first direction. The invention further relates to a self drilling rock bolt, a drill bit, drill shaft and shaft coupling, and an anchoring device per se.
Claims14
A shaft of a drilling tool extending between opposing ends, one of the ends being associated with a drill bit to penetrate rock, the other end being associated with a drilling apparatus to allow rotation of the shaft, the shaft comprising:
- a shaft section fabricated from glass reinforced polymer;
- a connector piece fabricated from a metal;
- and
- a mechanical joint joining the connector piece to the shaft section,
- wherein the shaft section has opposing shaft section ends, the shaft section being arranged to be cut and/or processed by a mining machine,
- wherein the connector piece is mechanically attached adjacent one of the shaft section ends, the connector piece being arranged to connect one of the drill bit, the drilling apparatus or an anchoring device to the shaft section, and
- wherein the mechanical joint is a deformable member swaged, crimped and/or pressed around both the connector piece and the shaft section to secure the connector piece to the shaft section.
Dependencies are inferred from the claim text.