| 摘要 |
<p>A sprayer assembly for connection to a container of liquid chemical to be sprayed has a manually operable rotary valve (11) mounted within a housing of the assembly (10). The valve (11) has a carrier liquid duct (27) and a product duct (28) opening into the liquid duct (27). The valve is selectively rotatable to an ON position in which the carrier liquid duct (27) is connected with a liquid product inlet opening and an OFF position in which the carrier liquid duct (27) is not connected with the liquid product inlet opening. The housing has a vent port, and an external vent control member (34) is mounted on the housing for movement by the valve to close the vent port in the OFF position and to open the vent port in the ON position.</p> |
