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US 4,047,665 AGranted
Spray control system
OwnerWilliam N. Moynihaninventor
Life of this patent
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OwnerWilliam N. Moynihaninventor
Estimating the term…
The control system is utilized in a high pressure liquid spraying system including an internal combustion engine, a pump driven by the engine, a source of liquid connected to the pump and a spray nozzle assembly connected by a high pressure conduit to the output of the pump. The control system includes an enclosure and a valve assembly mounted near the pump. The valve assembly is operated by an electric switch mounted on the nozzle assembly and connected to a first solenoid valve in a hydraulic system for operating the valve assembly. The valve assembly includes a hydraulic cylinder which is mounted on the enclosure and which has a plunger positioned to open a ball valve of the valve assembly which is mounted within the enclosure and which is connected to the output of the pump. At engine idle, the first solenoid valve supplies engine oil pressure to the hydraulic cylinder whereby the plunger is urged against the ball valve to open the same to permit water to be dumped, with the enclosure cushioning the discharge of water from the ball valve. The control system also includes a second solenoid valve in a hydraulic system including a cylinder for advancing the engine throttle to increase the pressure of the water being pumped. At engine idle, this second solenoid valve connects the throttle advancing cylinder to an engine oil return manifold. Operation of the electric switch causes the first solenoid valve to connect the hydraulic cylinder to the engine oil return manifold whereby the ball valve can close so that pressurized water is supplied to the spray nozzle assembly. Operation of the switch also causes the second solenoid valve to connect the throttle advancing cylinder to engine oil pressure to accelerate the engine to increase the water pressure.
In a high pressure, liquid spraying system including an internal combustion engine, a pump driven by the engine, a source of liquid connected to the pump and a spray nozzle assembly connected by a high pressure conduit to the output of the pump, the improvement comprising spray control means for controlling the pressure of liquid in and the flow of liquid to the spray nozzle assembly, for causing dumping of unneeded pressurized liquid at a location adjacent the pump and for cushioning the discharge of dumped liquid, said control means being electrically operated and including dump valve means adjacent the pump for dumping pressurized liquid, an enclosure surrounding said dump valve means and having openings therethrough, said enclosure serving to cushion the dumping of pressurized liquid from said dump valve means and said openings permitting easy flow of dumped liquid from said enclosure into the ambient environment, and hand manipulatable electric switch means mounted on the nozzle assembly for operating said dump valve means.
Dependencies are inferred from the claim text.