Drilling device having a radially displacable drill shank
Assigneefischerwerke Artur Fischer GmbH & Co. KG
InventorsHartmut Bohnet, Stefan Lind, Willi Haug
Life of this patent
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Abstract
The drilling device has a radially resilient shaft (3) which allows radial displacement of the drill bit (4) and the drill head (5). The radial displacement can be caused by a vibration device (8), but a self-excited oscillation of the resilient shaft (3) can also provide the desired radial displacement of the drill bit and the drill head. The drill shank (2) has a sleeve-shaped shank extension (17) provided with a damping chamber (18) filled with a damping agent (19) and the resilient shaft (3) is in the damping chamber (18) which is sealed by a radially resilient seal (21) surrounding the resilient shaft (3).
Claims10
A drilling device for making a drilled hole in a panel, said drilling device comprising a driven drill shank (2) connected with a drill bit chuck (23), an axially projecting drill bit (4) held in the drill bit chuck (23) and having a front end abrasive face (6) for engagement with the panel (10) to form the drilled hole (15), means for relative displacement of at least one of the panel (10) and the drill bit (4) radially with respect to a center line of the drill shank (2) and radially resilient bearing means for radially resiliently mounting the drill bit chuck (23) holding the drill bit (4), wherein said radially resilient bearing means comprises a radially resilient shaft (3) connecting the drill bit chuck (23) and the drill shank (2).
Dependencies are inferred from the claim text.