Cleaning of submerged surfaces by discharge of pressurized cavitating fluids

Abstract

A fluid discharge apparatus adapted to discharge a cavitating stream of pressurized liquid along with the selective discharge of a secondary material, such as sand, for removing dirt, debris, barnacles, marine growth, and other substances from surfaces is provided. More particularly, the invention contemplates a secondary hose inlet and nozzle outlet for discharging abrasive material, such as silica, to improve cleaning effectiveness. The combination of a secondary fluid or abrasive substance with the gas bubbles within the cavitating liquid stream that essentially explode upon impacting debris resulting in tremendous pressure fluxuations provides improved effectiveness in removing debris and aquatic growth from the submerged surface. The invention further improves upon the control of such devices with controls that allow the diver/operator to adjust flow rates and thrust without releasing his grasp. An improved hand-held apparatus is disclosed with a pistol grip and trigger actuator, and an improved wheeled vehicle is disclosed with improved control handles adapted to actuate valves and closure ports.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a continuation-in-part of U.S. patent application Ser. No. 10 / 396,981, filed Mar. 25, 2003.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] N / A COPYRIGHT NOTICE [0003] A portion of the disclosure of this patent document contains material that is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or patent disclosure as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all copyrights. BACKGROUND OF THE INVENTION [0004] 1. Field of the Invention [0005] The present invention relates generally to fluid discharging apparatus, and, more particularly, to an apparatus and method of commingling two pressurized fluids, such as a liquid and a gas, and discharging the commingled fluids in concentric spiral streams at a user controlled flow rate, whereby the commingled fluids are usefu...

AI Technical Summary

Benefits of technology

[0012] The present invention improves upon the prior art devices by providing an improved fluid discharge apparatus adapted to discharge a cavitating stream of pressurized liquid along with the selective discharge of an abrasive material, such as sand, for removing dirt, debris, barnacles, marine growth, and other substances from surfaces. More particularly, the invention contemplates a secondary hose inlet and nozzle outlet for discharging abrasive material, such as silica, to improve cleaning effectiveness. The combination of a secondary fluid or abrasive substance with the gas bubbles within the cavitating liquid stream that essentially explode upon impacting debris resulting in tremendous pressure fluxuations provides improved effectiveness in removing debris and aquatic growth from the submerged surface.

Problems solved by technology

The two specifically referenced devices of the prior art, however, are each burdended with similar disadvantages.

More particularly, both the hand-held and wheeled devices are limited to discharging cavitating water flow, and are not adapted for the additional discharge of a an abrasive material, such as sand, for more effective removal of debris and marine growth from submerged surfaces.

In addition, each of the specifically referenced devices include control levers that have proven difficult to manipulate by an operator in a diving suit.

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