Direct drive water-driven rotary tool

An improved direct drive water-driven rotary tool, comprising:

• a substantially annular rigid metal housing having a cylindrical cavity;
• a drive shaft having first and second ends wherein said first end is centrally mounted for rotation in said metal housing;
• a water-driven impeller mounted rotatably in said cylindrical cavity, said impeller having a central hole to allow for said first end of said drive shaft to be inserted therethrough;
• a substantially elongated annular inlet conduit removably connected at one end to and protruding from said housing and removably connected at a second end to a water supply under high pressure, said inlet conduit including a first nozzle having a nozzle tip in fluid communication with said impeller to rotatably drive said impeller;
• a cylindrically-shaped dish removably affixed to said housing including a central orifice for said second end of said drive shaft to protrude therethrough;
• an annular backing pad removably affixed to said second end of said drive shaft to be rotated thereby;
• a disposable working disk for sanding or grinding, attached to said backing pad via a strip of hooks and loops fastening tape situated upon attaching surfaces of said backing pad and said working disk;
• said dish comprises a support plate having a plurality of apertures disposed on its outer face such that water that is used to drive said impeller is able to flow through the support plate apertures and escape through centrifugal action;
• a shroud sized strategically to fit around the periphery of said dish having predetermined spacing between periphery of said dish, for deflecting said water that is used to drive said impeller away from said backing pad, said shroud having a substantially annular flange around its periphery;
• a handle connected to said housing wherein said handle is a substantially U-shaped saddle-handle having a protrusion, said rotary tool further comprising an elongated pool pole removably affixed to said protrusion and to opposing ends pivotally secured to an outer rim portion of said housing via securing means thereby allowing a user to control said rotary tool from a standing position, or a substantially D-shaped handle removably affixed to said housing thereby allowing a user to control said rotary tool from a position in close proximity to an operating surface;
• operating means connected to said conduit, wherein said operating means is in fluid communication with said conduit, said operating means includes a trigger for regulating the flow of water therefrom and to shut off the flow of water;
• said first nozzle is removable and additional nozzles interchangeable with said first nozzle and each having different inside diameters than said first nozzle, may be inserted within said conduit, said changeable nozzles allowing for the use of high pressure water sources of different pressure to obtain the same tool operational RPM;
• a circular bearing securing said first end of said drive shaft within said cylindrical cavity of said housing;
• said impeller having a plurality of curved, beveled blades around its periphery to allow for more precise directioning of water exiting said first or second nozzle toward each said impeller blade thereby increasing torque, wherein said impeller is situated strategically within said cylindrically-shaped dish to be in close proximity to water escaping from said nozzle;
• and
• said backing pad is removably threaded upon said drive shaft such that there exists sufficient space between said support plate and said backing pad to allow for the insertion of a wrench or similar tool between said backing pad and said support plate in order to facilitate removal of said backing pad.