US Patent 6902668 Chemical dispensing apparatus

An chemical dispensing apparatus, which has a dispenser head member and a chemical holding container for holding chemical, the dispenser head member having a flow entry means for directing fluid flow into the chemical holding container and a flow exit means for directing fluid flow out of the chemical holding container, the flow entry means being in fluid connection with a center-mounted, elongated perforated tubular member extending at least partway into the chemical holding container, the chemical holding container having an opening which is releasably engageable with the dispenser head member for refilling.