Patent ID: 6131212
Filing Date: 2000-10-17
Classification: A61H

Abstract:
An extendible and retractable air/water jet apparatus for use in fluid containing enclosures which have at least one side wall and a pressurized water distribution system, the jet apparatus comprising:an elongate housing having first and second ends, a hollow interior surrounded by a side wall, a first water outlet conduit at said first end adapted to be secured to the exterior of said enclosure side wall to place said housing interior in fluid communication with said enclosure interior, a first water port near said first end, and a second water port near said second end;a piston slidably disposed within said elongate housing interior engaged in reciprocating relation with the interior of said housing side wall, and having a water passageway extending therethrough, said piston being movable between said housing first and second ends; anda second water outlet conduit slidably disposed inside said first water outlet conduit and connected at a first end in fluid communication with said piston water passageway;a water discharge nozzle connected in fluid communication with a second end of said second water outlet conduit to move therewith, said second water outlet conduit having an outer diameter smaller than the interior diameter of said first water outlet conduit to define a water annulus therebetween; whereinwhen water under pressure fills said housing through said first water port, said piston is moved to a position near said housing second end, said second water outlet conduit and nozzle is retracted within said first water outlet conduit, and water flows through said water annulus and is discharged around said second water outlet conduit and nozzle into said enclosure; andwhen water under pressure fills said housing through said second water port, said piston is moved to a position near said housing first end, said second water outlet conduit and nozzle is extended outwardly relative to said first water outlet conduit, said piston closes off water flow through said water annulus, and water flows through said piston water passageway, through the interior of said second water outlet conduit and nozzle, and is discharged into said enclosure.