Vacuum cleaner telescopic suction hose has inner and outer tubes with inner pierced with row of holes to lock axial movement with peg and inner plate to seal holes against suction

摘要

The outer tube (8) has a locking arrangement (20) with a plunger (6) engaging one of a number of holes (9) in the inner tube (1) to lock axial movement until a lever (7) is pressed to release the plunger. An inner plate (14) prevents a loss of vacuum pressure through the holes.