Drilling device having a radially displacable drill shank

Details Drilling device having a radially displacable drill shank Drilling device having a radially displacable drill shank

1994-12-05

1996-07-30

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool-support with means to move tool relative to tool-support

To move radially

408236, B23B 4100

Patent

active

055405274

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).

REFERENCES:
patent: 2441158 (1948-05-01), Krasnow
patent: 5076743 (1991-12-01), Mark
patent: 5226763 (1993-07-01), Lind
patent: 5316419 (1994-05-01), Bohnet et al.

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