Device for washing and rinsing

Claim 1

An improved device for washing and rinsing, comprising: a. a portable mobile cart having means for rolling said cart thereon; b. a liquid pump mounted on said cart, said pump having an inlet for receiving liquid, an outlet for discharging said received liquid under a higher pressure, and mechanical means for operating said pump; c. an electric motor mounted on said cart, said motor having an output shaft connected to said mechanical means of said liquid pump, and having means for connecting said electric motor to a source of electric power; d. a flow distribution device having first, second, and third liquid connections; e. meanS for connecting said first connection of said flow distribution device to a source of water; f. means connecting said second connection of said flow distribution device to said inlet of said liquid pump; g. an unloader valve having a liquid inlet, a first liquid outlet, and a second liquid outlet, said unloader valve being arranged so that its liquid inlet is normally connected to its first liquid outlet, and so that its liquid inlet is disconnected from its first liquid outlet and connected to its second liquid outlet in response to a selected pressure differential between said liquid inlet and said second liquid outlet; h. means connecting said liquid inlet of said unloader valve to said outlet of said liquid pump; i. means connecting said first liquid outlet of said unloader valve to said third liquid connection of said flow distribution device; j. a venturi injector device mounted on said cart and having a main liquid inlet connected to a main liquid outlet, and a liquid injection inlet connected to said connected main liquid inlet and main liquid outlet; k. means connecting said main liquid inlet of said venturi injector device to said second outlet of said unloader valve; l. a container mounted on said cart for storing liquid detergents and the like; m. means connecting said container to said liquid injection inlet of said venturi injector device; and n. manually operable spray means connected to said main liquid outlet of said venturi injector device comprising a nozzle, a handle and a manually operable flow control valve whereby adjustment of said valve produces a variable ratio of detergent to water, said ratio varying directly as a function of the rate of liquid dispensed from said spray means, said ratio being approximately zero for small dispensing rates and increasing as the dispensing rate increases.