Reversing rotary drive sprinkler

Fluid sprinkling – spraying – and diffusing – Distributor continuously moves relative to support during... – Spray fluid motor drive means

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Details

239240, B05B 316

Patent

active

053301030

ABSTRACT:
The epicyclic gear train for the sprinkler includes a sun gear coupled to an impeller for rotation about a central axis. A planetary gear has a single set of teeth meshing with the teeth of the sun gear for revolving about the central axis while pivoting about a revolving planetary gear axis. A first ring gear is fixed relative to the sprinkler housing and has teeth meshing with the teeth of the planetary gear. Second and third ring gears are adjacent to the first ring gear and rotate about the central axis. The respective teeth of the second and third ring gears mesh with the planetary gear teeth. There is one less tooth on the second ring gear than on the first ring gear, and one more tooth on the third ring gear than on the first ring gear. As a result, the second and third ring gears rotate in opposite directions relative to the first ring gear. The second and third ring gears each have an outer surface with a plurality of protrusions spaced around the circumference. A drive pin is mounted to the sprinkler spray head adjacent to the outer surfaces of the second and third ring gears. The drive pin is rotatable between a first position in which it contacts a protrusion of the second ring gear without contacting the protrusion of the third ring gear, and a second position in which it contacts a protrusion of the third ring gear without contacting the protrusion of the second ring gear. The rotational drive force of the ring gear having the contacted protrusion is transferred through the drive pin to the spray head.

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