Patent ID: 7891583

Claim:
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.