Fluid sprayer system using modulated control valve and a...

Details Fluid sprayer system using modulated control valve and a... Fluid sprayer system using modulated control valve and a...

2005-04-26

2005-04-26

Trieu, Thai-Ba (Department: 3748)

Fluid sprinkling, spraying, and diffusing

With mobile tank-type supply means

Spray boom or bar type distributor

C239S001000, C239S172000, C239S071000, C239S163000

Reexamination Certificate

active

06883726

ABSTRACT:
A fluid sprayer system using a modulated hydraulic control valve and a positive displacement pump to control the amount of fluid sprayed by the system. The modulated hydraulic control valve may be controlled using pulse width modulation and may be provided with a substantially constant source of hydraulic fluid. The pulse width modulated hydraulic control valve provides the hydraulic fluid to a hydraulic motor as a controlled flow. The controlled flow serves to control the hydraulic motor that controls a positive displacement pump. The position displacement pump is used to control the amount of fluid sprayed by the system. The control system changes the signal to the control valve so as to mitigate pressure changes otherwise caused by said positive displacement pump.

REFERENCES:
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patent: 3512714 (1970-05-01), Phelps et al.
patent: 3599866 (1971-08-01), Bolton
patent: 3662953 (1972-05-01), Wiens
patent: 3782634 (1974-01-01), Herman
patent: 4530463 (1985-07-01), Hiniker et al.
patent: 5028017 (1991-07-01), Simmons et al.
patent: 5134961 (1992-08-01), Giles et al.
patent: 5433380 (1995-07-01), Hahn
patent: 5704546 (1998-01-01), Henderson et al.
patent: 5911362 (1999-06-01), Wood et al.

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