Patent ID: 7347044

Claim:
An exhaust water trap assembly comprising a housing extending axially along a vertical axis and having a housing sidewall, said housing having a lower inlet for receiving exhaust from an internal combustion engine, and an upper outlet for discharging said exhaust and spaced above said lower inlet, an internal exhaust tube extending upwardly from said lower inlet and spaced radially inwardly of said housing sidewall by a radial gap defining an annular space therebetween, said internal exhaust tube having a top end vertically spaced below said upper outlet by an axial gap, a dome cap at said top end of and spanning said internal exhaust tube and blocking entry of water axially downwardly therepast into said top end of said internal exhaust tube from said upper outlet and instead diverting and shedding said water radially outwardly into said annular space, a lower annular flange having an inner circumference at said internal exhaust tube and defining said lower inlet, and having an outer circumference at said housing sidewall and spanning and closing said annular space to form a collection space for said water, an upper annular flange spaced above said dome cap and providing said upper outlet, said internal exhaust tube having a lower section of a first outer circumference and extending axially through said lower flange at said inner circumference of said lower flange, said internal exhaust tube having a middle section of a second outer circumference and extending axially upwardly from said lower section and defining at least in part said annular space between said housing sidewall and said second outer circumference, said internal exhaust tube having an upper section of a third outer circumference and extending axially upwardly from said middle section and being perforated to pass exhaust radially outwardly therethrough, said second outer circumference being greater than each of said first and third outer circumferences, and one or more drain holes for draining water from said collection space, and comprising an intermediate annular flange axially spaced between said upper and lower annular flanges and axially spaced below said dome cap, said intermediate flange being formed on said internal exhaust tube and transitioning between said second and third outer circumferences and further diverting water into said annular space.