Vacuum cleaners

A vacuum cleaning apparatus of the kind comprising a suction device connected to a suction inlet and to a filtration device whereby contaminated fluid can be drawn through said inlet and passed through said filtration device to remove contaminants therefrom, said apparatus having:

• an elongated chamber having first and second ends, said first end being connected to said suction inlet;
• a resiliently extensible and contractable flexible hose self-biased to an extended state having first and second ends, said first end of the hose being held captive within said chamber and in sealed communication with the first end of the chamber and said second end of the hose being extendable beyond the outlet end of the chamber and being adapted for detachable attachment of a contaminated fluid pick-up tool thereto;
• cooperating retention means on the second end of the chamber and on the second end of the hose for releasably holding the second end of hose in retracted position at the second end of the chamber against said self-bias;
• and closure means at said second end of the hose which is opened on connection of said tool to said second end and which can be closed to seal the hose on detachment of the tool;
• whereby on release of said retention means and opening of said closure means the hose is extended from the chamber in response to the extensive self-bias thereof and on closure of said closure means the hose is contracted and drawn back into said chamber by suction from the suction device overcoming said extensive self-bias to be held therein by the retention means.