Patent ID: 6626375
Filing Date: 2003-09-30
Classification: B64D

Abstract:
A system for aerial spray marking of ground surfaces, said system comprising:a storage tank for holding a marking substance; a cylinder of compressed gas for pressurizing said storage tank; a pressure regulator; a high pressure line connecting said cylinder to said pressure regulator; a first regulated gas line connecting said pressure regulator to said storage tank; a spray nozzle assembly, said spray nozzle assembly including a first valve, a spray nozzle connected to said first valve, and a second valve arranged to open and close said fist valve; a feed line connecting said storage tank and said first valve so as to deliver pressurized substance to said spray nozzle assembly; a second regulated gas line connecting said pressure regulator to said second valve; and first and second pneumatic control ports fluidly connecting said second valve to said first valve, wherein said second valve is a solenoid valve having a first state in which said first pneumatic control port is pressurized by said second regulated gas line and a second state in which said second pneumatic control port is pressurized by said second regulated gas line, and wherein said first valve is closed when said first pneumatic control port is pressurized and said first valve is opened when said second pneumatic control port is pressurized.