APPARATUS FOR MULTIPLE AUTOMATIC IRRIGATION OF PLANTS Russian patent published in 1997 - IPC

FIELD: plant growing, in particular, growing of plants in closed ground in green houses. SUBSTANCE: apparatus has reservoir-doser, regulating device 4, tie-rod 5 connected through lever 6 with float 7, two-level retainer 8. Regulating device 4 has housing 12 with spring-loaded stem 13 having plug 10 fixed on its one end and two slides interconnected by spring and positioned on its other end. One slide is rigidly fixed on stem and other slide is mounted for movement relative to stem. Two-level retainer 8 has plate 17 rigidly connected with movable slide and provided with upper restrictor 18 and lower restrictor 19. When water level in reservoir-doser reaches predetermined level, retainer 8 is released by restrictor 18. Upon releasing of first slide by restrictor 19, stem 13 with plug 10 are lifted to provide water discharge. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 3 dwg