Air register

Claim 1

A ONE-PIECE LOUVER FOR ASSEMBLY WITH SIMILAR LOUVERS IN AN AIR REGISTER COMPRISING A RESILIENT SHEET HAVING A FIRST SUBSTANTIALLY PLANAR BODY PORTION, A SECOND SUBSTANTIALLY PLANAR BODY PORTION MAKING A DIHEDRAL ANGLE WITH SAID FIRST SUBSTANTIALLY PLANAR BODY PORTION, A PROJECTION AT EACH END OF EACH SUBSTANTIALLY PLANAR BODY PORTION AND EXTENDING SUBSTANTIALLY NORMAL TO THE PLANE OF THE SUBSTANTIALLY PLANAR BODY PORTION FROM WHICH IT EXTENDS, EACH OF SAID PROJECTIONS HAVING AN ENGAGING EDGE SUBSTANTIALLY NORMAL TO THE PLANE OF THE SUBSTANTIALLY PLANAR BODY PORTION FROM WHICH THE PROJECTION EXTENDS, SAID BODY PORTION HAVING A SUBSTANTIALLY COPLANAR EXTENSION HAVING A LONGITUDINALLY EXTENDING ENGAGING EDGE AT EACH END, EACH SAID BODY PORTION EDGE HAVING AN EXTENT IN A DIRECTION PARALLEL TO THE INTERSECTION OF SAID SUBSTANTIALLY PLANAR BODY PORTIONS SUFFICIENT TO RECEIVE AND SUPPORT THE ENGAGING EDGE OF A PROJECTION OF A NEXT ADJACENT LOUVER, SAID ENGAGING EDGES AND SAID BODY PORTION EDGES EACH HAVING COOPERATING MEANS THEREON SO POSITIONED THAT THE ENGAGING EDGES OF ONE LOUVER WILL NORMALLY NOT PASS THE BODY PORTION EDGES OF THE NEXT ADJACENT LOUVER AS THE LOUVERS ARE MOVED TOWARD EACH OTHER FOR ASSEMBLY WITH THE DIHEDRAL ANGLES OF THE LOUVERS SIMILARLY DIRECTED, SUBSTANTIALLY COEXTENSIVE AND FACING IN THE SAME DIRECTION, SAID ENGAGING EDGES AND SAID BODY PORTION EDGES BEING SO POSITIONED THAT A FORCE RESILIENTLY DEFORMING ONE OF THE LOUVERS TO CHANGE ITS DIHEDRAL ANGLE WILL ALLOW THE LOUVERS TO BE MOVED TOWARD EACH OTHER SO THAT SAID COOPERATING MEANS OF SAID ONE LOUVER ENGAGE THE COOPERATING MEANS OF THE BODY PORTION EDGES OF THE NEXT ADJACENT LOUVER, WHEREBY UPON RELEASE OF THE DEFORMING FORCE, THE ENGAGING EDGE OF EACH LOUVER WILL FRICTIONALLY ENGAGE AND BE INTERLOCKED WITH THE BODY PORTION EDGES OF THE NEXT ADJACENT LOUVER.