Fluid sprinkling – spraying – and diffusing – Serially operated distribution means
Patent
1981-02-23
1983-10-04
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Serially operated distribution means
13762414, 13762415, 1376242, 239 67, A01G 2502
Patent
active
044074514
ABSTRACT:
A water pressure controlled indexing means for an irrigation sprinkler system in which a plurality of pilot valves, each operating an associated sprinkler or group of sprinklers is provided, has a ratchet wheel including a plurality of ratchet teeth and which is associated with one of the pilot valves to control pilot valve operation in response to ratchet position of rotation, a pawl positioned by mounting means advancing the ratchet wheel tooth by tooth increments of advancement, water pressure responsive means for moving the pawl in a forward stroke and spring biasing means for normally moving the pawl in a return stroke of a given amount when system pressure is lowered a predetermined amount which is above a given value, a tooth gap provided on the ratchet wheel for defeating continued rotation thereof while said pawl is continued in driving strokes in response to system pressure drops above said given value and override means including an additional spring means normally holding the pawl against an override retrun stroke whereby a next ratchet tooth beyond tooth gap is engaged, the overriding means being activated by a reduction in system pressure below said given amount to cause the first biasing means to over come the second biasing means to move the pawl a greater extent then the normal return stroke to thereby engage the next ratchet tooth.
REFERENCES:
patent: 3747620 (1973-07-01), Kah
patent: 3783899 (1974-01-01), Fowler et al.
patent: 3797740 (1974-03-01), Kah, Jr.
patent: 3853145 (1974-12-01), Judd
Forman Michael J.
Kashnikow Andres
The Toro Company
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