Spray marking assembly

Fluid sprinkling – spraying – and diffusing – With system fluid relief or return to supply

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Details

239163, 239164, 239170, 239172, 239176, 248 75, B05B 1300

Patent

active

042276497

ABSTRACT:
The spray marking assembly is mounted on an agricultural or horticultural spraying or spreading implement to show visually, the area traversed so that the overlap or skip may be avoided. Usually, a pump sprays a dye from a tank through hoses to the extremity of the spray boom. This often causes poor markings due to scatter and loss as the pump has to move the fluid through the relatively long lines when demanded and the fluid and/or pressure tends to leak from the lines when not marking. The present device uses a motor and pump which run all the time when in use thus maintaining a constant pressure of fluid in the lines. A solenoid valve is situated at the extremity of the lines adjacent the discharge nozzle so that as soon as the valve is opened, the fluid under pressure is available at the nozzle. An accumulator is also provided adjacent the solenoid valve to give the necessary storage of extra fluid for dispersal through the discharge nozzle and to maintain the necessary pressure during opening of the discharge nozzle. A solid state timer in the cab of the tractor permits the operator to select the duration of spraying of the marking fluid, and the frequency of marking. An over-ride control enables the operator to mark manually on corners, knolls, and the like independently of the automatic actuation of the solenoid valve.

REFERENCES:
patent: 2800365 (1957-07-01), Hodges
patent: 2896862 (1959-07-01), Bede
patent: 3825185 (1974-07-01), Moon et al.

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