Internally adjustable spray angle rotary nozzle

A rotary nozzle apparatus comprising:

• a cup shaped outer housing having a central axis, the outer housing having a wall portion and a bottom portion;
• a tubular inner housing centered on the central axis within the outer housing having a feature engaging the wall portion of the outer housing;
• and
• an elongated nozzle body carried within the inner housing, the nozzle body having a tubular stem, a distal end of the stem carrying a nozzle head extending through a passage out of the inner housing to the bottom portion of the outer housing, wherein the nozzle body is configured to rotate around the central axis along a conical inner wall portion of the inner housing and direct fluid through the nozzle body and out through the nozzle head, and wherein an angle of the nozzle body with respect to the central axis may be adjusted by changing orientation of the feature engaging the wall portion of the outer housing to change an axial spacing between the bottom portion of the outer housing and the inner housing.