Reaction drive sprinkler

Fluid sprinkling – spraying – and diffusing – Distributor continuously moves relative to support during... – With impact motive means

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Details

239233, B05B 308

Patent

active

044349378

ABSTRACT:
A reaction drive sprinkler, particularly of the large gun type, is provided with an improved drive assembly adapted for full- or part-circle rotation of the sprinkler in steps about the axis of a water supply standpipe. The sprinkler includes a relatively large and outwardly inclined range tube from which a relatively high energy water stream is projected a substantial distance for irrigation purposes. The drive assembly comprises a drive nozzle mounted on the range tube for bleed passage of a relatively low energy portion of the irrigation water supplied to the range tube and for directing this low energy stream into engagement with one of a pair of oppositely angled deflector spoons at the end of a counterbalanced and pivotally mounted reaction drive arm. The drive nozzle is movable with respect to the range tube and is mechanically shifted by a reversing mechanism for aligning the low energy stream first for cyclic interruption by one of the deflector spoons to rotate the sprinkler stepwise in one direction through a preselected arcuate path and then for cyclic interruption by the other deflector spoon to rotate the sprinkler stepwise in an opposite rotational direction back through the preselected path. In one preferred form, the range tube is supported for rotation by a bearing assembly which includes a force-biased seal member responsive to increasing water pressure for increasing frictional resistance to rotation whereby the stepwise movement of the sprinkler is maintained substantially uniform throughout a range of water pressures. Moreover, the range tube is advantageously provided with a discharge nozzle assembly which is adjustable to select the angle of inclination of the projected high energy water stream.

REFERENCES:
patent: 2877053 (1959-03-01), Kennard
patent: 3924809 (1975-12-01), Troup
patent: 4103828 (1978-08-01), Ridgway
patent: 4161286 (1979-07-01), Beamer
patent: 4177944 (1979-12-01), Wichman
patent: 4235379 (1980-11-01), Beamer
National Rain Bird Sales & Eng. Corp. Model No. 100B Adjustable Nozzle "Instructions for Adjustment" 6-12-61.
National Rain Bird Sales & Eng. Corp. Sales Publication, No. 62-A9, Dec. 1962.
pp. 21-23, 1979-1980, Rain Bird Irrigation Equipment Catalogue.
Johns Manville Sales Publication Dec. 1977 (Model 211G/221G/250G).
Johns Manville Sales Publication Dec. 1977 (Model 5910).
Sime Sales Publication "Mod. Farmer".
Sime Sales Publication "Mod. Super Farmer".

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