Detergent and wetting agent dispenser for dishwashing machines

Claim 1

In a dishwashing machine having a wash water sump, a wash water spray head, a pump for re-circulating wash water to the wash water spray head, a fill water supply line for the sump, a rinse water spray head, a rinse water supply line for the rinse water spray head, and fill water and rinse water control valves for said supply lines, and separate reservoirs for wetting agent and detergent, the improvement which comprises a first variable delivery pump having an intake line leading from the wetting agent reservoir and an output line leading into the rinse water supply line, a second variable delivery pump having an intake line leading from the wetting agent reservoir and an output line leading to the sump, third and fourth variable delivery pumps each having an intake line leading from the detergent reservoir and an output line leading to the sump, each of said variable delivery pumps being driven by an electric motor normally open electrical circuits for energizing said motors, a first switch for closing the circuits to the motors for said second and fourth variable delivery pumps in response to opening of said fill water control valve, and a second switch for closing the circuits to the motors for said first and third variable delivery pumps in response to opening of said rinse water control valve.