Patent ID: 7063277

Claim:
A sprayer head assembly for connection to a container that defines a cavity for storing a chemical to be sprayed; the sprayer head assembly comprising: a chemical passage configured to be in communication with the cavity; a carrier fluid passage configured to be in communication with a carrier fluid source; a housing that has an outer surface and an inner surface, which defines a valve chamber configured to be in communication with the chemical and carrier fluid passages; a valve moveably positioned within the valve chamber between at least a first position, a second position and a third position, the valve defining a first passage, a second passage and a chemical inlet passage that is in communication with the second passage, the valve being configured such that, in the first position, the valve blocks the chemical and carrier fluid passages, in the second position, the first passage is configured to be in communication with the carrier fluid passage while the valve blocks the chemical passage, and in the third position, the second passage is configured to be in communication with the carrier fluid passage and the chemical inlet passage is configured to be in communication with the chemical passage; and a single sealing member positioned within a recess on the inner surface, the sealing member defining a sealing portion which extends around a first interface between the carrier fluid passage and the valve and a second interface between the chemical passage and the valve.