Point chisel
AssigneeHilti Aktiengesellschaft
InventorsJozsef Szendrovari, Werner Britten, Jozsef Varga
Life of this patent
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Abstract
A point chisel for use with a power tool includes an elongate stem (1) having, at its power tool side a shank (2) for securing the chisel in the power tool and, at its workpiece side, a useful region (3) having its outer diameter (H) tapering toward its workpiece end and having a cross-section (5) formed as a concave polygon by a plurality of axial grooves (4) extending radially toward a core diameter (K) that likewise tapers toward the workpiece side end of the useful region (3).
Claims11
A point chisel for use with a power tool, comprising a power tool side formed as a shank (2) for securing the chisel to the power tool;
- and a workpiece side adjoining the power tool side and forming working region having a cross-section inscribed in a circle (3) being provided at a workpiece end thereof with a chipping tip (3′) and having a core along an entire longitudinal extent thereof, the working region (3) having an outer diameter (H) tapering along a substantially entire axial extent thereof toward the workpiece end thereof and having a cross-section (5) formed as a concave polygon by a plurality of axial grooves (4) extending axially over substantially the entire longitudinal extent of the working region and up to the chipping tip (3′) and radially toward the core of the working region, wherein a core diameter (K) likewise tapers toward the workpiece end of the working region (3) along a substantially entire axial extent of the core, whereby cross-sectional surfaces of the cross-section (5) of the working region are similar in different cross-sectional locations (I, II, III, IV, V) of the working region.
Dependencies are inferred from the claim text.