Dual baffle system in automatic air inlets for livestock facilities

An automatic air inlet for livestock facilities, comprising,

• a housing having an air inlet end, air outlet end, a top, a bottom, sides, and an open interior compartment,
• a first baffle pivotally secured to said housing intermediate its ends and having an effective length and width to close one half of said compartment to air flow when in a transverse position with respect to said housing,
• a second baffle opposite to said first baffle and pivotally secured to said housing and having an effective length and width to close one half of said compartment opposite to said first baffle to air flow when in a transverse position with respect to said housing,
• said first and second baffles being interconnected together by a mechanism to pivot in unison with respect to said housing so as to create a widening air passage therebetween when pivoted in one direction, and to create a narrowing air passage therebetween when pivoted in a second direction;
• said mechanism being rigidly connected to one baffle, and slidably secured to the other baffle by means of a curved actuating surface whereby the two baffles will pivot together in unison through equal pivotal arcs.