Dust extractor for mechanical drill or chisel - comprises telescopic sleeves with bands of brushes between faces of tubes

摘要

The sleeves (3,4) are spring loaded (7) at the machine (1) ends and telescope within limits set by stops (2,8). Bands of brushes (5,6) seal the gap between the two sleeves. The outer sleeve (4) presses against the work (13) and telescopes as the drill (1a) penetrates. It also has a connection (9) for the hose of a vacuum machine (9a).The bristle elements can be distributed in bands over the same circumference of the inner sleeve. ADVANTAGE - Prevents clogging of the drill.