Abstract: A vacuum-blower unit has an intake connected by a flexible hose to a method plastics boot pivotally connected to the discharge portion of a rotary mower deck mounted on a riding tractor. The boot is also supported in horizontally spaced relation to the deck by a caster wheel to form an air gap and is adapted for convenient connection with decks of different sizes and configurations and having either a right or left discharge. The boot is cut to form an opening somewhat larger than the discharge outlet of the mower deck to extend the air gap which cooperates with air intake holes in the boot to avoid clogging of the boot with grass clippings, leaves and other debris transported by the vacuum-blower unit through flexible ducts to a trailing wheel supported cart. The cart includes a body enclosed by a canopy having an elongated top air discharge outlet covered by a screen and a row of independently pivotal louvers.

Abstract: A vacuum-blower unit has an intake connected by a flexible hose to a molded plastics boot pivotally connected to the discharge portion of a rotary mower deck mounted on a riding tractor. The boot is also supported in horizontally spaced relation to the deck by a caster wheel to form an air gap and is adapted for convenient connection with decks of different sizes and configurations and having either a right or left discharge. The boot is cut to form an opening somewhat larger than the discharge outlet of the mower deck to extend the air gap which cooperates with air intake holes in the boot to avoid clogging of the boot with grass clippings, leaves and other debris transported by the vacuum-blower unit through flexible ducts to a trailing wheel supported cart. The cart includes a body enclosed by a canopy having an elongated top air discharge outlet covered by a screen and a row of independently pivotal louvers.

Abstract: An apparatus is described for treating air for use as a coolant for machinery. The treatment includes cooling the air with water without injecting water droplets into the air stream which droplets can visibly be seen to come to rest on the machinery. The principal elements of this water treatment apparatus comprises: low water resistance evaporation means for cooling air passing therethrough; and water dispensing means for uniformly adding water to the water evaporaton means by having water exude from the water dispensing means over an area of mutual contact with the water evaporation means. Improved embodiments employ a temperature sensing mechanism for activating the air treating mechanism dependent upon the temperature of the ambient air. A further embodiment includes a water pressure regulator means for maintaining the required effluence from the water dispensing means to obtain the optimum wetting of the evaporation means.