Patent ID: 8449688

Claim:
A high-pressure washing liquid sprayer for use in a washing machine for washing a substrate, comprising: (a) an entry opening for washing liquid and (b) an exit opening for liquid in a jet, the entry and exit openings connected by a channel crossed by a stream of liquid, said channel having a rectangular cross section having a central constriction, giving that channel an X shape, so as to form, (i) downstream of the constriction, an expanded exit cavity ending in a slit forming the exit opening, the exit cavity being free of any obstruction, and, (ii) upstream of the constriction, an entry cavity having a frustum of pyramid shape with a rectangular base forming the entry opening of the channel, and wherein, across the entire distance between the exit opening to the entry opening, the width of the rectangular cross section of the channel gradually increases from the exit opening towards the entry opening of the channel, and wherein the sprayer enables the stream of liquid crossing the channel to be devoid of bubbles.