Patent ID: 9545642
Date: 2017-01-17
CPC Classifications: A01C,B05B

Claim:
1. A chemical dispensing apparatus for use in delivery of a treatment solution to a lawn, the apparatus comprising: a housing; said housing defining a main fluid passage, said main fluid passage fitted with an inlet hose coupling at one end thereof and fitted with an outlet hose coupling at an opposite end thereof, said inlet hose coupling permitting connection of said main fluid passage to a source of pressurized water, said outlet hose coupling permitting connection of said main fluid passage to a fluid distribution system; said housing further defining a chemical mixing fluid passage connected at a first end to said main fluid passage and connected at a second end to said main fluid passage, whereby fluid flowing through said main fluid passage can be diverted to flow through said chemical mixing fluid passage and then returned to said main fluid passage; a first control valve fluidically connected to said main fluid passage and to said first end of said chemical mixing passage, said first control valve selectively positionable between a first position wherein fluid flowing through said main fluid passage is diverted to flow through said chemical mixing passage and a second position wherein fluid flowing through said main fluid passage is precluded from flowing through said chemical mixing passage; a flap valve fluidically connected to said main fluid passage and to said second end of said chemical mixing passage, said flap valve positionable between a first position where said main fluid passage is sealed by a flow of fluid through said chemical mixing passage and a second position where said chemical mixing passage is sealed by a flow of fluid through said main fluid passage disposed across said main fluid passage at a downstream location of said main fluid passage; a fluid accumulator for containing a liquid chemical; and a siphon tube connecting said fluid accumulator and said chemical mixing fluid passage such that a flow of fluid through said chemical mixing passage results in a quantity of liquid chemical contained in said fluid accumulator being drawn through said siphon tube and into the flow of fluid through chemical mixing fluid passage.