Expiratory breathing exercise device

Claim 1

An expiratory breathing exercise device comprising: a substantially enclosed elongate air flow column disposed longitudinally in a generally vertical orientation, said air flow column having a horizontal cross-sectional interior dimension which increases in size upwardly in graduated increments over the length of said column; an air inlet located in said column adjacent the bottom thereof; connecting means for fluidly connecting said air inlet to the mouth of the user so that air expired from the user enters said column through said air inlet; at least one air outlet located in said column above said air inlet through which expired air entering said air inlet is exhausted from said column; an air flotation element movably disposed in said column so as to be lifted in said column by the blowing of air into said column with sufficient force by the user, said air flotation element being sized so as to fit relatively closely within said air flow column such that due to the increase in cross-sectional dimension of said column in increments, a given exhalation effort of the user causes said air flotation element to stabilize at a position in said air flow column relative to the cross-sectional dimension which corresponds to a given exhalation rate of air flow through said column and at a position where said air flotation element is visible to the user through said at least one air outlet; and restriction means for altering the resistance to air flow through said connecting means and into said column whereby the effort expended by the user in the raising of said air flotation element to a predetermined position in said column is increased as the resistance to air flow increases, said restriction means comprising a plurality of plugs having differing sized orifices, said plugs being interchangably insertable into said air inlet, the interior of said plugs being funnel shaped in the direction of flow so that a smooth non-turbulent flow of air enters said column.