Structure smoke exhauster

A structure of a smoke exhauster comprising:

• an enclosure having a top plate, a pair of lateral side plates, and a front panel;
• an exhaust vent passing through a central portion of said top plate;
• at least one motor secured under said top plate;
• at least one suction fan, each said at least one suction fan being coupled to the shaft of a corresponding said at least one motor and disposed thereunder;
• a fan housing disposed within said enclosure and surrounding each said at least one suction fan and said exhaust vent, said fan housing having at least one first circular aperture formed thereon, each said at least one first circular aperture being positioned below the fan rotor of a corresponding said at least one suction fan;
• a first releasable securing means for attaching said fan housing to the underside of said top plate;
• a concave lower hood plate disposed under said enclosure, said hood plate having at least one second circular aperture formed thereon, each said second circular aperture being positioned under a corresponding said at least one first circular aperture in registry therewith and having substantially equal diameter;
• a second releasable securing means for attaching said hood plate under said enclosure;
• a pair or roughly angle iron shaped pivoting bars pivotably mounted above said hood plate about respective corner portions thereof, each said pivoting bars having a release rod protruding downward from a horizontal arm thereof through a corresponding slot on said hood plate;
• a generally L shaped catch formed on the end portion of a vertical arm of each said pivoting bar, having a sloped upper cam surface and a substantially level lower abutment surface;
• a torsion spring biasing each said pivoting bar in a predetermined rotational direction;
• a pair of sloped locking bars fixedly secured at predetermined positions in a rear portion of said enclosure for engaging corresponding said pivoting bars;
• wherein, when the rear portion of said hood plate is raised upwards in said enclosure, each said locking bars engages said cam surface of a corresponding said catch, causing the rotation of said pivoting bar against said spring, said spring subsequently causing said pivoting bar to rotate in an opposite direction so that each said locking bars engages said abutment surface of a corresponding said catch.