Apparatus for dispensing a water treating composition into the recirculating water of an evaporative system

Claim 1

An evaporative cooler assembly, comprising a housing having an air inlet and an air outlet, a blower disposed within the housing, a plurality of evaporative pads enclosing said air inlet, a reservoir disposed in the lower portion of said housing, recirculating means for recirculating water from the reservoir and distributing said water to said pads, a container disposed within the housing and having a closed upper end and an outlet in the lower end, said container containing a liquid water treating composition, said container composed of generally flexible material and having a central waist portion of reduced cross section, a cap enclosing said outlet, conduit means having an inner end extending through the cap and having an outer end disposed in spaced relation above the level of water in said reservoir, said composition being fed by gravity from said container through said conduit means to the reservoir, a conical valve seat with a small diameter upper end and a large diameter lower end disposed in said conduit means with the axis of said seat being disposed at an acute angle with respect to the axis of said conduit means, a conical valve means disposed to engage said seat for regulating the flow of said composition through said conduit means, and manually engageable means located outside of said conduit means and operably connected to said valve means for adjusting the position of said valve means.