Operation safety device for a portable power tool

Details Operation safety device for a portable power tool Operation safety device for a portable power tool

1991-11-15

1993-02-09

Watts, Douglas D.

Cutting

Interrelated tool actuating means and guard means

Work guard

83478, 83490, 83DIG1, 30391, B27G 1902

Patent

active

051845342

ABSTRACT:
A power miter box includes a power driven blade which is lowered onto a workpiece. A main switch must be actuated manually by an operator to drive the blade. A separate safety switch operates to prevent the blade from being driven until it has been lowered onto the workpiece. The safety switch is operated by relative movement occurring between two guard members which encompass the blade.

REFERENCES:
patent: 3922785 (1975-12-01), Fushiya
patent: 4033218 (1977-07-01), Donatelle

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