Patent ID: 6540157
Filing Date: 2003-04-01
Classification: A47K,B05B

Abstract:
A fluid pump comprising a piston chamber forming member having an inner end and an outer end,the inner end to be placed in fluid communication with a source of fluid, a piston forming element received in the piston chamber forming member axially slidable inwardly and outwardly therein, the piston forming element having an axially extending hollow stem which extends out of said outer end of the piston chamber forming member, the stem having a central passageway ending at a nozzle, the piston forming element cooperating with the piston chamber forming member whereby in a stroke of inward and outward reciprocal sliding of the piston forming element in the piston chamber forming member between a retracted position and an extended position the piston forming element pumps fluid from the inner end through the piston chamber forming member via the passageway in the stem and out the nozzle, the nozzle including an inner tubular portion and an outer tubular portion, the inner tubular portion having an opening opening into the outer tubular portion and the outer tubular portion having an outlet, wherein a fluid passageway is formed passing through the inner tubular portion into the outer tubular portion and subsequently out of the outer tubular portion via the outlet, the outlet of the outer tubular portion is directed generally vertically downwardly, the opening of the inner tubular portion is directed generally vertically downwardly in alignment with the outlet of the outer tubular portion, the inner tubular portion having a maximum cross-sectional area for flow therethrough smaller than a minimum cross-sectional area for flow through the outer tubular portion.