Cutting bit with a face cutting edge, in particular for face...

Details Cutting bit with a face cutting edge, in particular for face... Cutting bit with a face cutting edge, in particular for face...

2007-05-21

2008-08-12

Fridie, Jr., Willmon (Department: 3722)

Cutters, for shaping

Including tool having plural alternatively usable cutting edges

C407S114000

Reexamination Certificate

active

07410332

ABSTRACT:
A cutting bit (10), in particular for face milling cutters, having an upper and a lower surface (3) which are connected by circumferential edge surfaces (4), wherein the cutting bit in plan view on to the upper surface (3) is of an approximately octagonal basic shape with alternately small and large corner angles, wherein formed between the respective corners (6, 7) at the transition of the circumferential surfaces (4) to the upper and/or lower surface (3) are respective cutting edges (1a, 1b, 1c, 1d,2a, 2b, 2c, 2d) of which a part (2a, 2b, 2c, 2d) in a top view appear as in a slightly broken or curved over a relatively smaller radius for use as roughing cutting edges and another part extends between adjacent corners (6, 7) straight or with a relatively larger radius for use as finishing cutting edges (1a, 1b, 1c, 1d). In order to provide a cutting bit having the afore mentioned features, which may also be used as wide finishing cutter, but which nonetheless has at least two and preferably at least four finishing cutting edges which can be used for either direction of rotation, there is suggested that in the top view perpendicularly onto the upper surface the cutting bit is of a symmetrical configuration only with respect to a rotation by 180° but not with respect to a rotation by 90°.

REFERENCES:
patent: 4475851 (1984-10-01), Hale
patent: 5525016 (1996-06-01), Paya et al.
patent: 5827016 (1998-10-01), Strand
patent: 5971676 (1999-10-01), Kojima
patent: 6543970 (2003-04-01), Qvarth et al.
patent: 6733214 (2004-05-01), Scherbarth

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