Patent ID: 8225785

Claim:
An oscillatory positive expiratory pressure therapy device comprising: an air-flow tube having a path of air flow movement from an inlet opening for receiving expiratory air passed thereto by a user receiving respiratory therapy, through an outlet opening for discharging the expiratory air passed through said inlet opening; said air-flow tube including expiratory air responsive closure means positioned in said path of air flow movement and actuable between an open position and a closed position in response to the pressure of expiratory air passed thereto; said expiratory air responsive closure means including a normally closed non-linear discharge outlet which is opened in response to the presence of a predeterminded pressure of expiratory air being passed in said path of air flow movement, and which closes in response to a predetermined rate of air pressure decrease through said non-linear discharge opening; said expiratory air responsive closure means further including a closure member movable in response to the expiratory air in said path of air flow movement between a closed position blocking the flow of expiratory air and an open positions permitting the flow of expiratory air in said path of air flow movement wherein said closure member is cone-shaped and said non-linear discharge outlet is bell-shaped; and nebulizer coupling means for connecting a nebulizer into fluid communication with said air-flow path from said inlet opening to a user; said nebulizer coupling means being formed in said air-flow tube in fluid communication between said inlet opening into said air-flow tube through which inspiratory air is received there into and said outlet opening for discharging expiratory air.