A fluid distribution system and method for mobile applications. The system includes a power source, a pump driven by the power source, and a motor driven by the pump. The system also includes a spray head with a fluid inlet passage, a fluid outlet passage, a fluid piston disposed in a chamber for co
A fluid distribution system and method for mobile applications. The system includes a power source, a pump driven by the power source, and a motor driven by the pump. The system also includes a spray head with a fluid inlet passage, a fluid outlet passage, a fluid piston disposed in a chamber for controlled access between the inlet and outlet passages and defining a variable orifice, and a hydraulic cylinder controllably engaged to the orifice. The fluid piston and the hydraulic cylinder are aligned with a common longitudinal axis, and the inlet passage is offset from the axis in a direction opposed to the location of the outlet passage.
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1. A spray head for a fluid distribution system comprising: a fluid inlet passage;a fluid outlet passage;a piston disposed in a chamber of a spray head body for controlled access between the inlet and outlet passages and defining a variable orifice;an internal diverter joined to the piston and dispo
1. A spray head for a fluid distribution system comprising: a fluid inlet passage;a fluid outlet passage;a piston disposed in a chamber of a spray head body for controlled access between the inlet and outlet passages and defining a variable orifice;an internal diverter joined to the piston and disposed within the variable orifice, the internal diverter having a wedge shape projecting outwardly from a base adjacent the piston to an internal diverter surface spaced upstream of the piston and facing the inlet passage, a ratio of an area of the internal diverter surface and an area of the inlet passage is between about 2:3 and about 1:10, wherein the internal diverter is disposed in the inlet passage when the variable orifice is closed; anda double acting hydraulic cylinder controllably engaged to the orifice. 2. The spray head of claim 1, wherein the piston is oriented within the chamber such that there is a blow-by gap between the piston and the spray head body around the circumference of the piston of at least about 0.25 mm. 3. The spray head of claim 1, wherein the piston is oriented within the chamber such that there is a blow-by gap between the piston and the spray head body around the circumference of the piston of between about 0.75 mm and about 1.5 mm. 4. The spray head of claim 1, wherein the ratio of the area of said internal diverter surface to the area of the inlet passage is between about 1:3 and about 1:4. 5. The spray head of claim 1, the spray head further including a fluid deflector connected to the spray head and configured to control a fluid distribution pattern from the outlet passage. 6. The spray head of claim 5, wherein the fluid deflector is configured to control a fluid distribution pattern in a laminar flow from the outlet passage. 7. The spray head of claim 6, the spray head further including a second fluid deflector. 8. The spray head of claim 1, wherein the hydraulic cylinder includes: a hydraulic piston having a head end and a rod end;a rod connecting the hydraulic piston to the fluid piston;a first hydraulic port positioned to allow hydraulic fluid in the hydraulic cylinder at the rod end; anda second hydraulic port positioned to allow hydraulic fluid in the hydraulic cylinder at the head end. 9. The spray head of claim 8, wherein the hydraulic cylinder further includes a spring disposed in the hydraulic cylinder at the head end. 10. The spray head of claim 1, wherein the hydraulic cylinder is fluidly isolated from the chamber. 11. A fluid distribution system, comprising: a power source;a pump driven by the power source;a motor driven by the pump; anda spray head configured to receive fluid from a fluid source associated with the motor, the spray head including; a fluid inlet passage;a fluid outlet passage;a piston disposed in a chamber of a spray head body for controlled access between the inlet and outlet passages and defining a variable orifice;an internal diverter joined to the piston and disposed within the variable orifice, the internal diverter having a wedge shape projecting outwardly from a base adjacent the piston to an internal diverter surface spaced upstream of the piston and facing the inlet passage, a ratio of an area of the internal diverter surface and an area of the inlet passage is between about 2:3 and about 1:10, wherein the internal diverter is disposed in the inlet passage when the variable orifice is closed; anda double acting hydraulic cylinder controllably engaged to the orifice. 12. The fluid distribution system of claim 11, wherein the motor is a variable displacement motor. 13. The fluid distribution system of claim 12 further comprising: a ground speed sensor;a fluid pressure sensor; anda controller receivably connected to the ground speed sensor and the fluid pressure sensor, and controllably connected to the variable displacement motor and the spray head. 14. The fluid distribution system of claim 13, wherein the spray head includes a plurality of independently controllable spray heads. 15. The fluid distribution system of claim 11, wherein the variable orifice is a continuously variable orifice. 16. The fluid distribution system of claim 11, wherein the power source includes a prime mover for a mobile machine. 17. The fluid distribution system of claim 16, wherein the prime mover includes an engine drivingly connected to the mobile machine and a transmission driven by the engine. 18. The fluid distribution system of claim 17, wherein the pump is a hydraulic pump driven by one of the engine and the transmission. 19. A spray head for a fluid distribution system comprising: a fluid inlet passage;a fluid outlet passage;a piston disposed in a chamber of a spray head body for controlled access between the inlet and outlet passages and defining a variable orifice, wherein the piston is oriented within the chamber such that there is a blow-by gap between the piston and the spray head body around the circumference of the piston of at least about 0.25 mm;an internal diverter joined to the piston and disposed within the variable orifice, the internal diverter having a wedge shape projecting outwardly from a base adjacent the piston to an internal diverter surface spaced upstream of the piston and facing the inlet passage, wherein the internal diverter is disposed in the inlet passage when the variable orifice is closed, and wherein the internal diverter surface faces the inlet passage and a ratio of the area of said internal diverter surface to the area of the inlet passage is between about 2:3 and about 1:10; anda double acting hydraulic cylinder controllably engaged to the orifice.
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