Patent ID: 7886941

Claim:
A manual pump dispenser including a discharge head reciprocable between pressure and return strokes, said pump dispenser comprising: a spout valve assembly located within an opening in said discharge head, an annular groove located within said discharge head opening; said spout valve assembly permitting outletting of liquid product through a passage in fluid communication with said discharge head opening during each of said pressure strokes, the assembly including a spout valve retained substantially within said discharge head opening by a retainer, said retainer having on an outer surface an annular rib, said annular rib being disposed within said annular groove, said spout valve being disposed within an opening in said retainer, and including a slit at a first end thereof and an orifice at a second opposite end thereof, said slit including slit lips directly engageable with each other to define a slit closed configuration and disengageable from each other to define a slit opened configuration, said spout valve being made of a material for permitting predetermined opening of said slit under pressure from the liquid product during each of said pressure strokes for thereby allowing the liquid product to be discharged out through said slit when in said slit opened configuration, and for otherwise permitting rapid closing of said slit to prevent the liquid product from being discharged through said slit when in said slit closed configuration, wherein said spout valve includes a tapered section that tapers to the first end of said spout valve and said retainer opening includes a tapered wall that extends in a complementary manner adjacent the tapered section of the spout valve during both the pressure and return strokes of the pump dispenser, wherein the tapered section and the tapered wall have the same taper angle.