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Pick-up head for a vacuum cleaner

  • US 5,634,238 A
  • Filed: 05/08/1995
  • Issued: 06/03/1997
  • Est. Priority Date: 10/08/1992
  • Status: Expired due to Fees
First Claim
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1. An attachment for connection to a suction hose of a vacuum cleaner for enabling liquid to be picked up from a surface and collected by the attachment, the attachment comprising:

  • a hollow body defining a collection container for receiving and collecting liquid therein;

    an outlet member disposed to be in flow communication with the container, the outlet member defining an outlet and including a connector adapted to be connected to the suction hose;

    a pick-up inlet member disposed to be in flow communication with the container, the inlet member defining an inlet adapted to be applied to the surface for picking up liquid therefrom;

    a flow path member extending in a flow path between the container and the outlet member, the flow path member defining;

    a flow restricting orifice adjacent a side wall of the container and near an upper end of the container, the orifice thereby being disposed upstream of the outlet and further having a cross-sectional area significantly less than that of the outlet and that of the inlet;

    an air expansion chamber disposed in a flow path between the orifice and the outlet;

    a vortex chamber disposed in a flow path upstream of and adjacent the orifice, the vortex chamber including a curved wall defining a concave flow surface extending across the flow path member from a position opposite the orifice to a position adjacent the orifice such that a flow off the concave flow surface is directed generally away from the orifice; and

    a means for reversing the flow off the concave flow surface from a direction generally away from the orifice to a direction toward the orifice.

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