Lighting and ventilating troffer assembly

Claim 1

A LIGHTING AND VENTILATING TROFFER ASSEMBLY INCLUDING A TROFFER MEMBER HAVING A TOP WALL AND SIDE WALLS, A VENT HOUSING HAVING A GENERALLY CORRESPONDING TOP WALL AN SIDE WALLS IN NESTING RELATION TO SAID TROFFER MEMBER, AN ELECTRICAL CONNECTION ACCESS OPENING IN THE TOP WALL OF SAID TROFFER MEMBER, A CORRESPONDING ACCESS OPENING IN THE TOP WALL OF SAID VENT HOUSING AND A ROTATABLY REMOVABLE ACCESS PLATE FORMED OF RESILIENT MATERIAL AND COOPERATING WITH ONE OF SAID TOP WALLS TO CLOSE SAID OPENING, SAID PLATE HAVING A MAI BODY ADAPTED TO COVER SUB STANTIALLY COMPLETELY SAID OPENING, TWO TAB MEANS LOCATED OPPOSITELY FROM THE CENTER OF ROTATION OF SAID PLATE, SAID TAB MEANS ADAPTED TO BE INSERTED AND ENGAGE SIMULTANEOUSLY THE UNDERSIDE OF THE WALL, AND TWO PROJECTION MEANS ON SAID PLATE LOCATED OPPOSITELY FROM THE CENTER OF ROTATION OF SAID PLATE AND SPACED FROM SAID TAB MEANS, SAID PROJECTION MEANS CONSTRUCTED AND ARRANGED TO RIDE UPON THE SURFACE OF SAID WALL AND RESILIENTLY DEFORM SAID PLATE AS SAID TAB MEANS MOVE TO LOCKING POSITION, SAID PROJECTION MEANS ADAPTED TO SLIDE FROM SAID WALL OVER EDGES OF SAID OPENING INTO SAID OPENING UPON TERMINAL MOVEMENT OF SAID PLATE, ALLOWING SAID PLATE TO STRAIGHTEN, SAID PROJECTIONS COOPERATING WITH SAID EDGES OF SAID OPENING OVER WHICH THEY SLIDE TO LOCK SAID ACCESS PLATE AGAINST INADVERTENT REMOVAL.