US D465848 S1
The illustrated ergospirometer is an instrument for measuring the air which enters and leaves the lungs of a person.
FIG. 1 is a front view of an ergospirometer incorporating our new design;
FIG. 2 is a rear elevation thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a left side view of the left paddle with the cord cut-way for ease of illustration;
FIG. 6 is a right side view of the left paddle thereof;
FIG. 7 is a left side view of the right paddle thereof; and,
FIG. 8 is a right side view of the right paddle thereof.