Oscillating sprinkler

An oscillating sprinkler comprising:

• a sprinkler housing including an inlet connected to a supply of water;
• a nozzle assembly configured to direct water out of the sprinkler;
• an output shaft mounted in the sprinkler housing and connected to the nozzle assembly;
• a movable gear cage mounted in the sprinkler housing and movably contacting the output shaft,
• the movable gear cage including:
• a toggle configured to change a direction of rotation of the output shaft;
• and
• a first drive gear on one side of a center position and a second drive gear on a second side of the center position, the first and second drive gears alternately engageable with the output shaft in a first position and a second position to rotate the nozzle assembly in opposite directions,
• wherein both the first drive gear and the second drive gear are out of engagement with the output shaft when the movable gear cage is in a center position between the first position and the second position;
• an over-center spring configured to bias at least one of the first drive gear and the second drive gear into engagement with the output shaft wherein the over-center spring moves the first drive gear toward the output shaft or the second drive gear toward the output shaft;
• two extensions rotatable with the output shaft for contacting the toggle to change the direction of rotation of the output shaft and move the movable gear cage over its center position;
• a first torsion spring provided on a first side of the over-center spring;
• and
• a second torsion spring position on a second side of the over-center spring,
• the first torsion spring and the second torsion spring biasing the movable gear cage into the first position when the first drive gear is engaged and into the second position when the second drive gear is engaged;
• the first torsion spring including a first lateral projection formed at a bottom of the first torsion spring and the second torsion spring including a second lateral projection formed at a bottom of the second torsion spring, at least one of the first lateral projection of the first torsion spring and the second lateral projection of the second torsion spring extending into a first slot formed below a top surface of a gear cage support surface on which the movable gear cage moves;
• and
• the over-center spring including:
• a coil with a center axis, wherein the center axis of the coil extends in a direction substantially perpendicular to a central axis of the sprinkler housing;
• and
• a respective lateral projection extending laterally from a bottom portion thereof and configured to be received in a respective slot formed in a vertical tab extending substantially parallel to the central axis of the sprinkler housing.