Drilling device for producing drilled holes with undercuts

Details Drilling device for producing drilled holes with undercuts Drilling device for producing drilled holes with undercuts

1992-09-24

1993-08-10

Howell, Daniel W.

Cutting by use of rotating axially moving tool

With product handling or receiving means

175209, 175213, 408 81, 408226, 408230, B23B 4100

Patent

active

052342948

ABSTRACT:
A drilling device for producing drilled holes with an undercut has a drill bit having a drilling head, a depth stop, an enlargement provided between the the drilling head and the depth stop and acting as a swivel bearing, a suction bell rotatably mounted on the depth stop, a bearing washer, and a resilient, ring-shaped cushioning element provided on the depth stop. The cushioning element abuts against the bearing washer and is connected to the suction bell. The depth stop of the drill shank has a concavely curved end face and the bearing washer has a convexly curved sliding face which rests on the concavely curved end face of the depth stop.

REFERENCES:
patent: 4372401 (1983-02-01), Fischer
patent: 4993894 (1991-02-01), Fischer et al.
patent: 5092717 (1992-03-01), Fischer

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