Router with dust suction hood

Details Router with dust suction hood Router with dust suction hood

1997-11-25

1998-12-08

Coan, James F.

Woodworking

Cutter hood or dust conveyor

1442522, 409137, B27G 2100

Patent

active

058456880

ABSTRACT:
A device for cutting a workpiece by means of a rotatingly driven tool bit has a suction hood surrounding the tool bit in annular manner with a through-opening for the tool bit to pass through. The suction hood forms a suction duct open to the tool bit which is limited by an outer wall. At least a part of the outer wall is curved in a perpendicular plane in the form of a parabola, and the focal point of the parabola lies beneath the workpiece engagement surface formed by the suction hood. Because of this parabola shape, chips thrown by the tool bit against the outer wall are reflected essentially parallel to the workpiece engagement surface and thus do not escape up through the through-opening.

REFERENCES:
patent: 3837383 (1974-09-01), Ko
patent: 3935678 (1976-02-01), Marton
patent: 3987589 (1976-10-01), Marton
patent: 4750536 (1988-06-01), Grisley
patent: 4805353 (1989-02-01), Keith et al.
patent: 4813462 (1989-03-01), Linn
patent: 4821365 (1989-04-01), Charters
patent: 4946422 (1990-08-01), Colligan
patent: 4986703 (1991-01-01), Hampl et al.
patent: 5031678 (1991-07-01), Remmele et al.

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