Wood router bit

Details Wood router bit Wood router bit

1992-12-11

1994-06-28

Terrell, William E.

Woodworking

Rotary cutter

End thrust

144221, 407 54, 407 63, 408227, 408230, B27G 1302, B23C 510, B23B 5102, B23D 1300

Patent

active

053238230

ABSTRACT:
A router bit for laterally cutting through sheets of wood product, such as plywood and the like. The bit includes a shank portion adapted to be gripped in the chuck of a router, a fluted portion, and a tip. The fluted portion has two helical left-hand flutes. Each flute has a cutting edge and a web portion having a convex surface that extends rearwardly and immediately inwardly from the cutting edge, without a land, in a continuous curve. The flutes are formed by parabolic grinding. In one embodiment the tip is conical in shape and has two diametrically opposed tip flutes for cutting axially into a workpiece. In another embodiment the tip is flat and the bit is adapted only to cut laterally through the workpiece.

REFERENCES:
patent: 1702812 (1929-02-01), Cochran
patent: 1963611 (1934-06-01), Brumell et al.
patent: 3003224 (1961-10-01), Ribich
patent: 3701188 (1972-10-01), Wall et al.
patent: 4480949 (1984-11-01), Van De Bogart
patent: 4655650 (1987-04-01), Crawford et al.
patent: 4712984 (1987-12-01), Kidani
patent: 4893968 (1990-01-01), Levy
patent: 5004384 (1991-04-01), Hosoi
patent: 5046902 (1991-09-01), Zubov et al.
patent: 5049009 (1991-09-01), Beck et al.
patent: 5143490 (1992-09-01), Kopras

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