Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
October 30, 2007
Patent Application Number
11128531
Date Filed
May 13, 2005
Patent Primary Examiner
Patent abstract
A portable water-driven rotary tool for drilling, grinding and polishing concrete and stone that provides for high torque and that uses water pressures as the power source, the tool including a water control valve, an impeller with blades and a drive shaft that has a longitudinal axial water passage disposed therethrough for diverting water used to power the tool onto a work surface for lubrication and as a cleaning agent.
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