Patent Number: 6,490,505

Title: Irrigation timer with multiplexing watering mode

Abstract: An irrigation timer (2) includes a controller (8), including output signal terminals (18) coupleable to irrigation valve actuators (20) and an internal clock, and user inputs (12). Each irrigation valve actuator is coupleable to an irrigation valve for a watering zone with a watering period setting for each of the watering zones during a watering cycle (96). The controller divides the watering period for each watering zone by an integer n greater than 1 to obtain fractional watering periods (98). This permits each zone to be watered for its fractional watering period during a first fractional watering cycle (100) prior to beginning a second fractional watering cycle n of the fractional watering cycles constitute the watering cycle. The use of fractional watering periods help to spread out watering over a long period of time in each zone.

Inventors: Simon; Timothy M. (San Francisco, CA), Smith; Blaine M. (Portland, OR)

Assignee: Tim Simon, Inc.

International Classification: A01G 25/16 (20060101); G05D 007/00 ()

Expiration Date: 12/03/2019