| 摘要 |
<p>The invention concerns vacuum cleaners of a type having a collection cavity into which air is drawn by a vacuum drive for the collection of air entrained detritus, the cavity being provided with an inlet vent for entry of dirty air, and a base portion in which detritus is collected in use and an outlet formed in an upper region of the cavity and which is in gas communication with the vacuum drive for drawing air into the cavity. A filter bag is disposed in the base portion, the filter bag having an aperture for the entry of air-entrained detritus, wherein the inlet vent comprises a stub pipe which enters into the cavity and wherein the bag aperture is a sliding fit over the stub pipe so that the bag may be engaged with the vent by sliding the aperture at least part of the way along the stub pipe so that a free end of the stub pipe empties into the interior of the bag, characterised in that the bag is provided with a retaining tie which may be clamped to restrict travel of the aperture back along the stub pipe to cause disengagement of the bag with the vent.</p> |
