TELESCOPIC SUCTION TUBE OF VACUUM CLEANER Russian patent published in 2010 - IPC A47L9/24 

FIELD: individual supplies.

SUBSTANCE: telescopic suction tube comprises outer tube and inner tube, which is axially moved versus it and has fixing grooves protruding inside along generatrix from its side surface to middle axis. Fixing grooves interact with at least one stop of blocking mechanism arranged on outer tube with the possibility of alternate disconnection or blocking. Outer tube has the second fixing grooves open outside from its side surface and from middle axis. Outer tube is telescopically surrounded with an additional outer tube, on end of which facing blocking mechanism there is an additional blocking mechanism. At least one stop of additional blocking mechanism interacts with the second fixing grooves of outer tube. Fixing grooves of inner tube and the second fixing grooves of outer tube are arranged in one radial plane and are oriented axially between each other, when both blocking mechanisms are in their blocking position.

EFFECT: provision of increased universality with adjustment of telescopic suction tube length.

8 cl, 8 dwg