Seawater hydraulic rotary disk tool

A pressurized seawater powered rotary disk tool having an abrasive saw/grinding disk tool connected thereto and which may be removed therefrom, said seawater powered rotary disk tool comprising:

• a gear and pinion housing;
• a seawater powered vane motor rotatably mounted on said gear and pinion housing and removable from said housing, said seawater powered vane motor having a shaft Journaled within said housing, an inlet port and an outlet port;
• control means having a trigger and a passageway connected to the inlet port of said seawater powered vane motor, the trigger of said control means when engaged allowing pressurized seawater to pass through said control to the inlet port of said seawater powered vane motor so as to rotate the shaft of said vane motor;
• a receiving plate affixed to said gear and pinion housing, said receiving plate having on an inner cylindrical surface thereof four indents spaced ninety degrees apart;
• a motor/housing interface plate attached to said vane motor and having a cylindrical shaped opening and an outer cylindrical surface, said outer cylindrical surface having four locking tabs spaced ninety degrees apart and shaped respectively the same as the four indents of said receiving plate;
• said four locking tabs when aligned respectively with the four indents of said receiving allowing for the insertion of the front portion of said motor interface plate within said receiving plate and for the removal of said motor interface plate from said receiving plate;
• means for locking said motor/housing interface plate in a fixed position with respect to said receiving plate;
• a drive gear rotatably mounted in said housing in axial alignment with the shaft of said seawater powered vane motor, said drive gear being coupled to and removable from the shaft of said seawater powered vane motor;
• a driven shaft rotatably mounted in said gear and pinion housing perpendicular to the axis of said drive gear, said driven shaft having a square shaped end portion extending from said gear and pinion housing;
• means positioned in the square shaped end portion of said driven shaft for connecting said abrasive saw/grinding disk tool to said rotary disk tool and for allowing said abrasive saw/grinding disk tool to be disconnected from said rotary disk tool;
• a driven pinion affixed to said driven shaft, said driven pinion being in operative engagement with said drive gear;
• and
• means for directing pressurized seawater exhausted from said seawater powered vane motor onto the back side of said saw/grinding disk tool so as to reduce the drag of said saw/grinding disk tool when said saw/grinding disk tool engages a work surface and to flush away loose material from said work surface.