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1. (WO2018024882) TABLE SAW WITH CUTTING BLADE SAFETY FEATURE

Pub. No.:    WO/2018/024882    International Application No.:    PCT/EP2017/069792
Publication Date: Fri Feb 09 00:59:59 CET 2018 International Filing Date: Sat Aug 05 01:59:59 CEST 2017
IPC: B23D 45/06
B23D 47/08
B27G 19/02
Applicants: ROBERT BOSCH GMBH
Inventors: FROLOV, Andrew
VOONG, Gary L.
Title: TABLE SAW WITH CUTTING BLADE SAFETY FEATURE
Abstract:
A power tool has a base defining a work surface (15), a rotary cutting blade (20) extending through an opening in the work surface, a drive motor (28) for imparting rotational movement to the cutting blade and a power train (26) coupled between the drive motor and the cutting blade to transmit rotation movement from the drive motor to the cutting blade. A swing arm assembly (40) carries the cutting blade and is pivotably supported on the base at a pivot axis. A latch (49) support the swing arm assembly in an operating condition in which the cutting blade extends through the opening in the work surface and is configured to be released to permit the swing arm assembly to pivot about the pivot axis to a safety position in which the cutting blade is beneath the work surface. In one aspect of the present disclosure, the power tool includes a safety system operable in response to an emergency signal that includes a mechanism for stopping the rotation of the cutting blade, whereby the rotational inertia of the cutting blade is converted after the rotation is stopped to pivoting of the swing arm assembly carrying the blade when the rotation of the blade is stopped.