Patent ID: 7124962

Claim:
A sprayer for cleaning a surface, the sprayer comprising: a carrier fluid supply channel; a control valve in fluid communication with the carrier fluid supply channel; a mixing channel in fluid communication with the control valve; a housing suitable to contain a chemical to facilitate cleaning of the surface, the housing being in fluid communication with the mixing channel such that a flow of carrier fluid through the mixing channel can mix the chemical into the carrier fluid if carrier fluid passes through the mixing channel and the chemical is in the housing; a rinse fluid channel in fluid communication with the control valve; and a filtered fluid channel in fluid communication with the control valve; wherein the control valve has a flow selector that is configured such that, if the carrier fluid supply channel is linked to a carrier fluid supply, rotation of the selector in a single direction can selectively supply the carrier fluid to the mixing channel, or to the rinse fluid channel, or to the filtered fluid channel, or to none of the mixing channel, rinse fluid channel, and filtered fluid channel; and wherein the flow selector is configured such that if the carrier fluid supply channel is linked to a carrier fluid supply rotation of the selector in a single direction can selectively and sequentially supply the carrier fluid to none of the mixing channel, rinse fluid channel and filtered fluid channel in a first position, then to the rinse fluid channel in a second position, then to the mixing channel in a third position, then to none of the mixing channel, rinse fluid channel and filtered fluid channel in a fourth position, then to the rinse fluid channel in a fifth position, and then to the filtered fluid channel in a sixth position.