Ventilation Valve

1. Ventilation valve

2. Ventilation valve

Figure 1 . 1 of a first embodiment of a ventilation valve showing our new design;

Figure 1 . 2 is another perspective view thereof is another perspective view thereof;

Figure 1 . 3 is a front elevation view thereof, the rear elevation view being the minor image of Figure 1 . 3 ;

Figure 1 . 4 is side elevation view thereof, the other side elevation view being the mirror image of Figure 1 . 4 ;

Figure 2 . 1 of a second embodiment of a ventilation valve showing our new design;

Figure 2 . 2 is another perspective view thereof is another perspective view thereof;

Figure 2 . 3 is a front elevation view thereof, the rear elevation view being the minor image of Figure 2 . 3 ; and

Figure 2 . 4 is side elevation view thereof, the other side elevation view being the mirror image of Figure 2 . 4 .