Sanitary rotary tank cleaning apparatus

A rotary tank cleaning spray nozzle assembly comprising:

• a stationary outer housing;
• a liquid inlet disposed at an upper end of said stationary outer housing for connection to a liquid supply and for direction of liquid into said stationary outer housing;
• a rotary housing disposed below said stationary outer housing for rotation relative to said stationary outer housing about a central axis of said stationary outer housing;
• a nozzle hub having at least one liquid spray nozzle, said nozzle hub being mounted on said rotary housing for rotation relative to said rotary housing about an axis transverse to the central axis of said stationary outer housing;
• a fluid driven drive mechanism including a rotor associated with said rotary housing for rotating said rotary housing relative to said stationary outer housing as an incident to the direction of liquid through said stationary outer housing;
• said rotary housing and said nozzle hub having cooperating gears for rotating said nozzle hub relative to said rotary housing as an incident to rotation of said rotary housing with respect to said stationary outer housing;
• a first one piece retaining clip positionable through aligned openings in components of said stationary outer housing and said rotary housing for releasably coupling said rotary housing to said stationary outer housing, said first one piece retaining clip being removable from said aligned openings of said components of said stationary outer housing and said rotary housing for disassembling of said rotary housing from said stationary outer housing;
• a hub cap having an enlarged diameter outer end for retaining said nozzle hub on said rotary housing for rotation relative to said rotary housing, a second one piece retaining clip positionable through aligned openings in said rotary housing and said hub cap for releasably securing said hub cap to said rotary housing and in turn retaining said nozzle hub on said rotary housing;
• and said second one piece retaining clip being removable from said rotary housing and said hub cap for permitting removal of said hub cap from said rotary housing and in turn removal of said nozzle hub from said rotary housing, and also permitting removal of said hub cap from said nozzle hub.