Maximum expiratory flow meter device (Machine-translation by Google Translate, not legally binding)

摘要

Maximum expiratory flow measuring device, essentially characterized by comprising a cylindrical body with one of its bases coupled to a tubular component forming radial entry holes and coupled to a nozzle intended to receive the flow of expiration, figuring inside the cylinder a fixed axial rod serving as a guide for the displacement of a discoidal component derived in a tubular appendix acting as a piston, requested with tendency to retraction by a nelicoidal spring disposed around the axial rod, the side wall of the cylinder having a longitudinal opening provided with an index displaceable by the thrust of the disc-piston in conjugation with a scale graduated in units of volume per unit of time located parallel to said opening, while the other base presents orifices for the outlet of the air. (Machine-translation by Google Translate, not legally binding)