Title: Cutter tool for use in a boring head

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Claims: It is claimed:

1. A cutter tool for use in a boring head, said cutter tool being developed as a plate having two faces and six end surfaces, one face of said plate having the form of an irregular hexagon the six sides of which form sections of the three sides of a first equilateral triangle and sections of the three sides of a second equilateral triangle, said triangles being superposed on each other and angularly offset with respect to each other around an acute angle, said sections of said first triangle being developed as primary edges and said sections of said second triangle being developed as secondary edges, said end surfaces bordered by said primary edges being rake and planar, and said end surfaces bordered by said secondary edges being rounded chamfers.

Other info:

Inventors: Weinreich, Siegfried (Bierden, DT)

Application Number: 518526
Filing Date: 1974-10-29
Publication_date: 1976-02-03
Assignee: Firma Gebruder Heller (Bierden, DT)
Primary Class(es): 407/103 408/188, 408/713
Other Classes:
US Patent Ref:

3250154	May, 1966	Breuning	408/199.
3376763	Apr, 1968	Welles	408/713.
3816893	Jun, 1974	Farrow	90/105.
3861010	Jan, 1975	Weinreich	408/239.

Other Refs:
Primary Examiner: McGehee, Travis S.
Assistant Examiner: Bilinsky, Z. R.
Attorney: Wigman & Cohen