Router bit

Details Router bit Router bit

1984-08-24

1986-02-25

Briggs, William R.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having peripherally spaced cutting edges

407 53, 407 54, B23B 5100, B26D 112

Patent

active

045727147

ABSTRACT:
A router bit comprises a shank and a fluted portion, for example two or four fluted bit. The two fluted bit comprises two upper cutting edges higher than a predetermined standard line and two lower cutting edges lower than the standard point. Helixes of the upper and lower cutting edges are twisted in the opposite direction relative to each other. Helix angles of the upper and lower cutting edges are equal or different in absolute angle.

REFERENCES:
patent: 2778252 (1957-01-01), Oxford, Jr.
patent: 3701188 (1972-10-01), Wall et al.
patent: 3749189 (1973-07-01), Boehm
patent: 3913196 (1975-09-01), Maday
patent: 4227837 (1980-09-01), Yodoshi
patent: 4274771 (1981-06-01), Nishimura
patent: 4395167 (1983-07-01), Maternus
patent: 4475850 (1984-10-01), Penoza et al.
patent: 4480949 (1984-11-01), De Bogart

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