Moisture-removing low-restriction air intake system

Claim 1

A moisture-removing, low-restriction, engine-air intake for a truck having a cab and an internal combustion engine with an air cleaner supplying cleaned air to the engine, comprising: an obstruction-free, substantially vertical pipe portion behind the cab, said vertical pipe portion having an inlet end positioned generally above the upper end of the cab and an interior passage free from internal structures and obstructions extending down to a footpipe portion defining a substantially right angle passageway leading from the vertical pipe portion to a horizontal outlet below said cab and connected to said air cleaner, said footpipe portion having a sunken water-trap on its bottom where said right angle becomes horizontal, said water-trap being vertically in line with the lower portion of said vertical pipe portion and a bottom wall leading upwardly therefrom to said outlet, the abrupt change in direction of flow of the air at said right angle tending to separate entrained water from the air and deposit it in said water-trap, an obstruction-free forced-air cap on said inlet end, and drain means in said water-trap for evacuating collected water from said air-trap without leaking any substantial amount of air therefrom.