Back to results
US 5,397,203 AGranted
Tool and tool holder for hand-tool apparatus
AssigneeHilti Aktiengesellschaft
InventorsWerner Kleine, Wolfgang Lange, Reinhard Schulz, Holger Meinke
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeHilti Aktiengesellschaft
InventorsWerner Kleine, Wolfgang Lange, Reinhard Schulz, Holger Meinke
Estimating the term…
The tool for a tool holder of hand tools used for chiseling and/or percussion drilling has a chucking shank (9). This chucking shank (9) is provided with two rotary driving grooves (10) which are located diametrically opposite one another and open axially toward the free end of the chucking shank (9). Also, the chucking shank (9) has two diametrically opposite, axially closed locking grooves (11). In order to increase the total working surface decisive for the transmission of torque, two longitudinal grooves (12) are provided which are likewise arranged diametrically opposite one another and open axially toward the free end of the chucking shank (9). The length of these longitudinal grooves (12) exceeds the length of the locking grooves (11). The axes of symmetry (L) of the longitudinal grooves (12) are arranged at an acute angle (a) to the axes of symmetry (V) of the locking grooves (11). In addition, the flanks (12a) of the longitudinal grooves on the driving side extend in a straight line and tangentially relative to the base of the locking grooves (11) so as to form optimal working surfaces for the transmission of torque.
Tool for insertion in a tool holder for a hand-tool apparatus used for chiseling, percussion drilling or both, with a chucking shank having at least one axially closed locking groove and at least two rotary driving grooves, which open axially toward a free end of the chucking shank, comprising at least one longitudinal groove which opens axially toward the free end of the chucking shank and is arranged in such a way that, on the one hand, there are unequal distances in the circumferential direction relative to the rotary driving grooves adjacent to the grooves following in both circumferential directions;
A tool holder with a receptacle opening for a tool used for chiseling, percussion drilling or both, comprising at least one radially displaceable locking member cooperating with axially closed locking grooves,
Dependencies are inferred from the claim text.