Drilling and/or chiseling tool
AssigneeHilti Aktiengesellschaft
InventorsUdo Hauptmann, Martin Richter, Konrad Artmann
Life of this patent
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AssigneeHilti Aktiengesellschaft
InventorsUdo Hauptmann, Martin Richter, Konrad Artmann
Estimating the term…
A drilling and/or chiseling tool (1) comprises a shaft (2) and a cylindrical insertion end (4) connected with the shaft (2) with at least one elongated recess (5 to 8), open toward the outer surface of and toward the free end of the insertion end (9) and forming a rotationally locking groove. A collar (3) is disposed between the shaft (2) and the insertion end (4) and extends at least partially around the tool (1) and projects at least radially outwardly of the shaft (2) and of the insertion end (4). The cylindrical insertion end (4)has a diameter not less than 18 mm and preferably larger than 22 mm. The at least one recess (5 to 8) has a cross-sectional area, extending perpendicularly to the axis of the tool (1), and expands toward the outer surface and is provided essentially in the form of an arc of a circle. A tool chuck of a drilling and/or chiseling device, matched to the insertion end, is provided to receive the insertion end (4) of the tool (1) and fit rotationally locking bodies into the at least one elongated recess (5to 8).
A drilling and/or chiseling tool has an axially extending shaft (2), said shaft having a cylindrical insertion end (4) with an outer axially extending surface having at least one axially elongated recess (5 to 8) open toward the outer surface of and toward a free end (9) of the insertion end (4) and forming a rotationally locking groove, and a collar (3) is disposed between the shaft (2) and the insertion end (4) and extends at least partially around the tool (1) and projects at least outwardly from the shaft (2) and the insertion end (4), said insertion end has a diameter (d) of at least 18 mm, and said recess (5 to 8) has a cross-sectional area, extending perpendicularly to the axis of said shaft (2) and expanding toward the outer surface and is formed essentially in the form of an arc of a circle and is arranged to receive similarly shaped means for transferring torque to said recess in said tool, said insertion end (4) has four recesses (5, 6, 7, 8), which are arranged at the same angular distance from one another around the circumference of said insertion end (4), and said recesses (5 to 8) each have a length (l), in the range of about 2 times to about 4 times the diameter (d) of said insertion end (4).
Dependencies are inferred from the claim text.