Patent ID: 7744019

Claim:
A sprayer capable of providing a first liquid in confluence with a second liquid whereby the second liquid is combined with a pressurized air stream before its introduction to the first liquid, said sprayer comprising: a first liquid passageway for carrying the first liquid through the sprayer; a second liquid passageway for carrying the second liquid through the sprayer; a pressurized air passageway for carrying the pressurized air through the sprayer, wherein the second liquid passageway feeds into the air passageway so that the second liquid combines with the pressurized air stream before its introduction to the first liquid; and a first check valve between the second liquid passageway and the air passageway, wherein said first check valve adapted to close and prevent the second liquid from draining out of the second liquid passageway when the second liquid is not being pumped through the second liquid passageway; wherein the first check valve comprises a bolt frame chamber having walls and a stopper that fits into a seat; and wherein the chamber walls of the frame extend longitudinally outward past the seat so that when the stopper is removed from the seat by pressure thereby allowing the second liquid to pass through the check valve, the stopper remains within the extended chamber walls.