Dispensing assembly with shut off valve, backflow preventer, and methods of operating the same

摘要

A dispensing assembly for dispensing a mixture of fluids is provided. In some embodiments, the dispensing assembly includes a first valve for selectively permitting fluid flow to a mixing chamber in which a second fluid is introduced, wherein the valve is actuated between open and closed positions responsive to fluid pressure downstream of the mixing chamber. In such embodiments, the fluid pressure downstream of the mixing chamber can change based upon whether fluid is dispensed from a spray gun, wand, nozzle, or other dispensing head of the dispensing assembly.

主权项

1. A dispensing assembly for dispensing at least one fluid, the dispensing assembly comprising:
a source of a first fluid; a valve having opened and closed positions in which the valve permits and inhibits flow of the first fluid, respectively; a magnet coupled to the valve; a source of a second fluid; a first chamber in fluid communication with the source of the first fluid via the valve, and in fluid communication with the source of the second fluid; a dispenser outlet through which the first and second fluids are dispensed from the dispenser assembly, the dispenser outlet having opened and closed states in which flow of the first and second fluids from the dispenser outlet is permitted and inhibited, respectively; and a second chamber in fluid communication with the first chamber; the valve movable from the opened position to the closed position responsive to a change in fluid pressure within the second chamber, and movable from the closed position to the opened position responsive to an opposite change in fluid pressure within the second chamber, the magnet positioned to attract another part of the valve in at least one position of the valve.