Fram Corporation

Charles L Deschenes

A precleaner assembly for the air intake system of a heavy duty vehicle ejects duct particles and other heavy material from the incoming air stream so that the heavy particles will not clog the normal vehicle air cleaner, thereby greatly increasing its life. The precleaner assembly includes an inlet which faces the direction of vehicle movement, so ambient air is rammed into the inlet of the precleaner. The rammed air is directed through turning vanes located in a diverging portion of the assembly to induce a vortex or spiral flow component to the fluid. Centrifugal force generated by movement of the dust particles in the spiral path causes the latter to be centrifuged radially outwardly with respect to the direction of movement of the flow stream. These heavy particles therefore are concentrated in the radial outermost portion of the flow stream, which is ejected from the assembly, so that the remaining portion of the flow stream will be relatively free of the heavy particles. This remaining portion of the flow stream is then communicated directly to the vehicle air cleaner.

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N. Attleboro, MA, United States of America

Charles L Deschenes