Patent ID: 9532563
Date: 2017-01-03
CPC Classifications: A01M

Claim:
1. A liquid spraying apparatus comprising a spray nozzle assembly having a nozzle support body forming a liquid inlet section and a liquid outlet section, the liquid outlet section leading fluidly to a nozzle; a check valve disposed in a check valve supporting hub section connected to the nozzle support body, the check valve selectively fluidly connecting the liquid inlet section with the liquid outlet section; wherein the check valve supporting hub section has an annular passage communicating with said liquid inlet section and a tube supported within said annular passage defining a return passage communicating between said annular passage and said liquid outlet section when said check valve is in said open position; a liquid supply for directing liquid to said liquid inlet section of the nozzle, through the check valve, through a flow metering passage disposed downstream of the check valve, and through the liquid outlet section for discharge from the nozzle as a liquid spray; a liquid flow monitoring system disposed within the flow metering passage and configured for monitoring liquid flow through said flow metering passage; said monitoring system including a turbine disposed in said flow metering passage and being rotatable as an incident and in relation to liquid flow through said flow metering passage; said turbine having a magnet for generating changing magnetic fields incident to rotation thereof; a sensor for sensing the changing magnetic fields generated by rotation of said turbine and producing responsive signals; and a control module communicating with said sensor for monitoring a flow rate through said flow metering passage based upon signals received from said sensor; and a global positioning system (GPS) associated with the control module; wherein the control module is programmed to: