Dome pump spray assembly
View Patent ↗A dome pump spray assembly employing a known structure of a liquid dome pump in association with a uniquely configured spray spout to achieve atomization of liquids such as soaps, sanitizers, disinfectants and the like. The spray spout includes a deflector which is in juxtaposition to a spout spray tip having angled partial depth passages therein that extend to a central tapered outlet orifice, the passages and orifices generating a vortex of cyclonic action that serves to achieve atomization of the liquid as it passes therethrough.
1. A dome actuated spray pump, comprising:
a pump housing having a valved inlet and a valved outlet;
a flexible dome received by said pump housing and defining a cavity therebetween, said inlet and outlet communicating with said cavity;
a spray spout connected to said outlet, said spray spout comprising:
a valve for said outlet at a first end of said spray spout and in operative engagement with said outlet;
a deflector comprising a disk defining passages between outer peripheral edges of said disk and an inner wall of said spray spout; and
a spout spraying nozzle at a second opposite end of said spray spout, said spout spraying nozzle comprising a cup-shaped member defined by a cylindrical wall encompassing a bottom plate and having an orifice passing through said bottom plate, wherein a first surface of said bottom plate defines an outer end surface of said spray spout, a second opposite surface of said bottom plate is in juxtaposition to said deflector, and said second opposite surface is characterized by a plurality of substantially identical partial depth passages interconnecting with said orifice and uniformly spaced about said orifice, wherein said partial depth passages extend from said inner wall of said spray spout to said orifice and increase in cross section as they extend away from said inner wall, wherein each of said partial depth passages comprises a pair of separated walls and a passage floor, wherein one wall of each of said pair of walls of said partial depth passages is substantially straight, and the other wall is dog-legged.
2. The dome actuated spray pump according to claim 1 , wherein said inner wall of said spray spout is cylindrical.
3. The dome actuated spray pump according to claim 2 , wherein said disk of said deflector is further characterized by uniformly spaced radial arms extending therefrom and defining said passages therebetween.
4. The dome actuated spray pump according to claim 1 , wherein a top edge of each of said walls is beveled.
5. The dome actuated spray pump according to claim 4 , wherein said dog-legged wall has a first section spaced from said first wall and separating therefrom at an angle of 5-10°, and a second section connected to said first section and extending substantially parallel to said first wall.
6. The dome actuated spray pump according to claim 5 , wherein said first section is more than three times the length of said second section.
7. The dome actuated spray pump according to claim 5 , wherein said orifice diminishes in diameter as it extends from said second side to said first side of said spout spray tip.
8. The dome actuated spray pump according to claim 7 , wherein said plurality of partial depth passages comprises three such passages.
9. The dome actuated spray pump according to claim 5 , wherein said dog-legged walls generate a vortex of cyclonic action into said orifice and which continues through said orifice.
10. The dome actuated spray pump according to claim 9 , wherein said partial depth passages are in communication with said passage defined between said peripheral edges of said deflector and said inner wall of said spray spout.