Wet and dry suction cleaner with rotary coupling - has two axially-spaced annular grooves in extension tube for locking bolt and cleansing liq. supply

摘要

The cleansing liq. (e.g. water) is supplied through an inner tube integrated into the wall (4) of the suction tube (3) and running into an outer tube (8) to the end where it is closed. A bore (9) connects the outer tube (8) to the inner surface of the suction tube (3) whose extension (10) features an annular groove (13) connected by another bore (14) to the inner tube (12). Another annular groove (15) is provided for a locking bolt (16) through the outer wall. ADVANTAGE - Relatively simple coupling allows rotation with uninterrupted simultaneous and opposite flows of air and cleansing liq.