Pressure regulator and filter for irrigation systems

Details Pressure regulator and filter for irrigation systems Pressure regulator and filter for irrigation systems

2005-08-17

2009-12-08

Cecil, Terry K (Department: 1797)

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Filter cleaning

C210S137000

Reexamination Certificate

active

07628910

ABSTRACT:
A control device for use with irrigation systems includes one or more of a solenoid-actuated valve, a pressure regulating valve, and a self-cleaning filter assembly. The filter assembly filters water flowing to the pressure regulating valve and the solenoid actuated valve. The filter assembly reciprocates a wiper over a filter screen to clean the screen. The wiper is on a shaft with one or more grooves that provides a pathway for unfiltered water to remove particulate matter from the filter assembly. The solenoid actuated valve controls the filter assembly and the pressure regulating valve. When the solenoid actuated valve is off, the pressure regulating valve is closed. When the solenoid actuated valve is on, water flows through the pressure regulating valve and also to a control chamber of the filter assembly.

REFERENCES:
patent: 4081171 (1978-03-01), Morgan et al.
patent: 4353385 (1982-10-01), Maisch et al.
patent: 4360037 (1982-11-01), Kendall
patent: 4671485 (1987-06-01), Saarem
patent: 5118072 (1992-06-01), Sakamoto et al.
patent: 5996608 (1999-12-01), Hunter et al.
patent: 6139727 (2000-10-01), Lockwood
patent: 6575307 (2003-06-01), Lockwood

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