Expiratory Resistor

FIG. 1 is a top perspective view of an expiratory resistor according to a first embodiment.

FIG. 2 is a front elevation view of the expiratory resistor shown in FIG. 1 .

FIG. 3 is a side elevation view of the expiratory resistor shown in FIG. 1 .

FIG. 4 is a top end view of the expiratory resistor shown in FIG. 1 .

FIG. 5 is a bottom end view of the expiratory resistor shown in FIG. 1 .

FIG. 6 is a bottom perspective view of the expiratory resistor shown in FIG. 1 .

FIG. 7 is a top perspective view of an expiratory resistor according to a second embodiment.

FIG. 8 is a front elevation view of the expiratory resistor shown in FIG. 7 .

FIG. 9 is a side elevation view of the expiratory resistor shown in FIG. 7 .

FIG. 10 is a top end view of the expiratory resistor shown in FIG. 7 .

FIG. 11 is a bottom end view of the expiratory resistor shown in FIG. 7 .

FIG. 12 is a bottom perspective view of the expiratory resistor shown in FIG. 7 .

FIG. 13 is a top perspective view of an expiratory resistor according to a third embodiment.

FIG. 14 is a front elevation view of the expiratory resistor shown in FIG. 13 .

FIG. 15 is a side elevation view of the expiratory resistor shown in FIG. 13 .

FIG. 16 is a top end view of the expiratory resistor shown in FIG. 13 .

FIG. 17 is a bottom end view of the expiratory resistor shown in FIG. 13 .

FIG. 18 is a bottom perspective view of the expiratory resistor shown in FIG. 13 .

FIG. 19 is a top perspective view of an expiratory resistor according to a fourth embodiment.

FIG. 20 is a front elevation view of the expiratory resistor shown in FIG. 19 .

FIG. 21 is a side elevation view of the expiratory resistor shown in FIG. 19 .

FIG. 22 is a top end view of the expiratory resistor shown in FIG. 19 .

FIG. 23 is a bottom end view of the expiratory resistor shown in FIG. 19 ; and,

FIG. 24 is a bottom perspective view of the expiratory resistor shown in FIG. 19 .

As is evident from FIGS. 4 and 5 , the expiratory resistor of the first embodiment has reflective symmetry between front and rear sides, and left and right sides; therefore FIGS. 2 and 3 represent the views of front and rear sides, and left and right sides, respectively. As is evident from FIGS. 10 and 11 , the expiratory resistor of the second embodiment has reflective symmetry between front and rear sides, and left and right sides; therefore FIGS. 8 and 9 represent the views of front and rear sides, and left and right sides, respectively. As is evident from FIGS. 16 and 17 , the expiratory resistor of the third embodiment has reflective symmetry between front and rear sides, and left and right sides; therefore FIGS. 14 and 15 represent the views of front and rear sides, and left and right sides, respectively. As is evident from FIGS. 22 and 23 , the expiratory resistor of the fourth embodiment has reflective symmetry between front and rear sides, and left and right sides; therefore FIGS. 20 and 21 represent the views of front and rear sides, and left and right sides, respectively.