Wiper

Claim 2

In an apparatus for filling containers with liquids comprising a tubular filling probe arranged for relative axial movement with respect to a container to be filled so as to allow its insertion into the container for delivering fluid into the container and to allow its withdrawal from the container after delivery of fluid has been completed, the improvement comprising a wiper block formed with a bore the end of which to be positioned adjacent the container is enlarged to provide a pressure chamber, said probe being slidable within said bore and through said pressure chamber, said block being formed with a plurality of inwardly directed jets opening into said pressure chamber, and means adapted to connect said jets to a sOurce of gaseous fluid under pressure, whereby gaseous fluid from said jets and said pressure chamber forces liquid on the outside of said probe downwardly along said probe and off the delivery end thereof and into said container upon the withdrawal of the probe therefrom through said wiper block.

Claim 3

The improvement according to claim 1 wherein a portion of said bore extends above said pressure chamber and provides a loose-fit mounting for said probe to thereby to allow a small volume of said gaseous fluid to escape upwardly through said bore, the gaseous fluid pressure in said pressure chamber being sufficient to inhibit the entry of liquid wetting the outside of said probe into said pressure chamber.

Claim 4

The improvement according to claim 1 wherein said jets extend radially and perpendicularly to the axis of said bore.

Claim 5

The improvement according to claim 3 comprising an annular chamber disposed radially outwardly of said jets and in fluid communication therewith, and an inlet duct extending between said annular chamber and an outside surface of the block to allow connection with said source of gaseous fluid.

Claim 6

The improvement according to claim 1 wherein the probe is formed with a cap on its lower end, said cap having a cusp-shaped profile.

Claim 7

In an apparatus for filling containers with liquids the improvement comprising a wiper block formed with a bore, a probe slidable within said bore and being formed on its lower end with a cap having a cusp-shaped profile with an extreme tip at its lower end, said block being formed with a plurality of radially inwardly directed jets disposed in a plane perpendicular to the axis of said bore, said bore being enlarged at the lower end thereof to form a pressure chamber and said jets opening into said chamber adjacent its upper end, an annular chamber disposed radially outwardly of said jets and in fluid communication therewith, a duct connecting said annular chamber with an outside surface of the block and means adapted to connect said duct to a source of gaseous fluid under pressure, whereby upon the withdrawal of the probe from a container through said wiper block, gaseous fluid under pressure from said jets and said pressure chamber forces liquid adhering to the outside of said probe downwardly off said cap extreme tip and into said container.

Claim 8

In an apparatus for filling containers with liquids the improvement comprising a wiper block formed with a bore, a probe slidable within said bore and being formed on its lower end with a cap having a cusp-shaped profile with an extreme tip at its lower end, said block being formed with a plurality of radially inwardly directed jets disposed in a plane perpendicular to the axis of said bore, said bore being enlarged at the lower end thereof to form a pressure chamber and said jets opening into said chamber adjacent its upper end, an annular chamber disposed radially outwardly of said jets and in fluid communication therewith, a duct connecting said annular chamber with an outside surface of the block and means adapted to connect said duct to a source of gaseous fluid under pressure, whereby upon the withdrawal of the probe from a container through said wiper block, gaseous fluid under pressure from said jets and said pressure chamber forces liquid adhering to the outside of said probe downwardly off said cap extreme tip and into said container.