Hand-held power tool with a rotary driven tool

Details Hand-held power tool with a rotary driven tool Hand-held power tool with a rotary driven tool

1991-03-01

1992-03-10

Watts, Douglas D.

Cutlery

Powered planer

30382, 188 711, B27C 100, B23D 5700, F16D 5100

Patent

active

050940007

ABSTRACT:
A hand-held power tool with a rotary driven tool, in particular a planer or a circular saw, is arranged so that on switching off the drive, which can be switched on and off by means of a trigger (15), a brake element (34), which is ineffective when the drive is switched on, is brought into braking engagement with a brake part (51) rotatingly driven by the drive. The tool comprises a safety element (21) which co-operates with the trigger (15) and which can be displaced between a safety position in which the trigger (15) cannot be moved to switch on the drive, and a release position in which the trigger (15) can be moved into the position to switch on the drive. The safety element (21) is urged by spring pressure towards the safety position and is held in the release position when the trigger (15)L is in the switch-on position. The safety element (21) is coupled mechanically with the brake element (34) so that in the release position of the safety element the brake element is not in the braking engagement, and in the safety position it is in braking engagement.

REFERENCES:
patent: 3074517 (1963-01-01), Kohli
patent: 3313379 (1967-04-01), Dence
patent: 3679027 (1972-07-01), Jansson
patent: 4335514 (1982-06-01), Overy et al.
patent: 4433710 (1984-02-01), Posta
patent: 4487294 (1984-12-01), Geeck
patent: 4625406 (1986-12-01), Fushiya et al.

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