Patent Publication Number: US-D850610-S

Title: Ventilation duct insert

Description:
FIG. 1  is a perspective view of a ventilation duct insert, with the flaps closed; 
         FIG. 2  is a top view of the ventilation duct insert of  FIG. 1 , with the flaps closed; 
         FIG. 3  is a bottom view of the ventilation duct insert of  FIG. 1 , with the flaps closed; 
         FIG. 4  is a left side view of the ventilation duct insert shown in  FIG. 1 ; 
         FIG. 5  is a right side view of the ventilation duct insert shown in  FIG. 1 ; 
         FIG. 6  is a front side view of the ventilation duct insert shown in  FIG. 1 ; 
         FIG. 7  is a rear side view of the ventilation duct insert shown in  FIG. 1 ; 
         FIG. 8  is a cross-sectional view through line  8 - 8  of the ventilation duct insert shown in  FIG. 2 ; 
         FIG. 9  is a cross-sectional view through line  9 - 9  of the ventilation duct insert shown in  FIG. 2 ; 
         FIG. 10  is a front perspective view of the ventilation duct insert of  FIG. 1 , with one flap open; and, 
         FIG. 11  is a front perspective view of the ventilation duct insert as shown in  FIG. 1 , with all flaps open.