Cutting section for a core bit
AssigneeHilti Aktiengesellschaft
InventorsFlorian SCHROEDER, Guenter DOMANI, Pingyan RONG
Life of this patent
Estimating the term…
Abstract
A cutting section (11) which is connectable to a drill shaft section via a releasable connecting device. The cutting section includes a first closed tubular element (14) which is in the form of a first hollow cylinder having a first waved, trapezoidal or zigzag-shaped cross-sectional area, a second closed tubular element (15) which is in the form of a second hollow cylinder having a circular ring-shaped cross-sectional area, and one or more drill segments (16) which are connected to the first closed tubular element (14).
Claims10
1-9 (canceled)
A cutting section for a drill bit, the cutting section being connectable to a drill shaft section of the drill bit via a releasable connection, the cutting section comprising:
- a first closed tubular element in the form of a first hollow cylinder having a first waved, trapezoidal or zigzag-shaped cross-sectional area and having a first hollow cylinder height, a first inside diameter and a first outside diameter;
- a second closed tubular element in the form of a second hollow cylinder having a second circular ring-shaped cross-sectional area and having a second hollow cylinder height, a second inside diameter and a second outside diameter, wherein the first inside diameter is smaller than the second inside diameter, and the first outside diameter is larger than or equal to the second outside diameter;
- and
- at least one drill segment connected to the first closed tubular element;
- a first upper end surface of the first closed tubular element being connected to a second lower end surface of the second closed tubular element.
Dependencies are inferred from the claim text.