Split helix router bit

Details Split helix router bit Split helix router bit

1981-08-16

1984-10-09

Briggs, William R.

Cutters, for shaping

Rotary cutting tool

Face or end mill

407 53, 408229, B26D 112

Patent

active

044758502

ABSTRACT:
A router especially adapted for cutting plastic fibrous materials cleanly. The router design is a cylindrical body having two sets of cutting edges extending the full length of the bit except for the shank. The cutting edges are helically oriented along the shaft of the router and one set of cutting edges extends helically right-handed while the other set of the cutting edges extends helically left-handed. The two cutting edges are separated by a pair of flutes or grooves diametrically opposed to each other. The cutting edges are also diametrically opposed to each other along the shaft of the cylinder. The router bit is used to trim plastic laminated materials reinforced with fibers.

REFERENCES:
patent: 121059 (1871-11-01), Moeller et al.
patent: 1630602 (1927-05-01), Blanco
patent: 2778252 (1957-01-01), Oxford
patent: 3749189 (1973-07-01), Boehm
patent: 3913196 (1975-10-01), Maday
patent: 4227837 (1980-10-01), Yodoshi
patent: 4274771 (1981-06-01), Nishimura
patent: 4338050 (1982-07-01), Ozer et al.
patent: 4395167 (1983-07-01), Maternus

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