Hose with tongue, in particular for a vacuum cleaner

摘要

The tubing used as suction hose (9) has inner corrugation troughs (24) which are formed in wall along longitudinal direction. The projecting tongue is provided in the region of the inner corrugation troughs for pneumatic and hydraulic smoothing of the tubing. The projecting tongue is equipped for covering each inner corrugation trough such that length of tongue exceeds the width of inner corrugation trough.