Safety improvements for power tool

摘要

A hand-held power tool is described comprising a cutting blade within a housing (5) and a guard (10) placed over the operating head of the tool. The guard is movable in the direction (1) in order to expose the blade during cutting. The sliding mechanism is improved by maintaining alignment between the guard and the head over a larger distance. In one embodiment, this is achieved by sliders (figure 8) in grooves (9). Contact over a larger range reduces the likelihood of jamming and improves handle precision. <??>Also described are means for indicating the blade position (23), and a frangible retaining washer for disengaging a cutting blade (figures 13 to 15). <IMAGE>