KNAPSACK BLOWER-SPRAYER

摘要

A knapsack blower-sprayer has its load bearing structure constituted by an hollow body (1) of molded plastic material that extends for the whole height of the machine, has a broadened base portion (3) compared to the narrower top portion (4), forming a quarter-moon shaped rest basement, rearwise and frontwise extended flanks (5, 6) in proximity of the broadened base (3) to which they join partially wrapping the flanks of the bearer, and has a concave or recessed area on the outer surface of the back wall of the hollow body (1), at the centre of which is defined a ventilation tube (11) or nest of tubes passing through the molded body (1), open on the outer surfaces of the front and back walls of the hollow body. The hollow body has two liquid filling openings at the rims of respective tubular appendices (7, 8) that extend from the two sides of the top (4) of the molded hollow body, closed by screw caps (2, 19). Through a first filling opening, access is provided to a fuel tank (18) defined within the inner space of the hollow body (1) f Dr containing the fuel that is delivered through a hose to the internal­combustion engine (24) of the centrifugal fan (23). The second liquid filling opening accesses the internal volume of the hollow body (1) that is fillable with a liquid to be sprayed that substantially surrounds the outer surface of the fuel tank (18) defined or installed inside the hollow body shielding it from external heat. T