초록 ▼

A pressure control apparatus (10) for CPAP treatment or assisted respiration. The apparatus (10) includes an inlet chamber (20) for connection to a primary supply of air or other breathable gas at a pressure at or above a maximum treatment pressure, an outlet chamber (30) for communication with a ma

A pressure control apparatus (10) for CPAP treatment or assisted respiration. The apparatus (10) includes an inlet chamber (20) for connection to a primary supply of air or other breathable gas at a pressure at or above a maximum treatment pressure, an outlet chamber (30) for communication with a mask (14) or the like, a diaphragm (32) for communication with a portion of the outlet chamber (30), means (22) to provide a predetermined force to the diaphragm (32), a first valve means (36) operable to open a flow path between the outlet chamber (30) and the inlet chamber (20) in response to deflection of the diaphragm (32) in a first direction and a second valve means (40) operable to provide an exhaust path from the outlet chamber (30) to atmosphere in response to deflection of the diaphragm (32) in a second direction opposite to the first direction. When the pressure of gas in the outlet chamber (30) produces a force on the diaphragm (32) below the predetermined force the force differential on the diaphragm (32) causes it to deflect in the first direction and cause the first valve means (36) to open and to cause an equilibrating flow of gas from the inlet chamber (20). When the pressure of gas in the outlet chamber (30) produces a force on the diaphragm (32) above the predetermined force the force differential on the diaphragm (32) causes it to deflect in the second direction and cause the second valve means (40) to open.

대표청구항 ▼

[ What is claimed is:] [1.]1. A pressure control apparatus for CPAP treatment or assisted respiration, said apparatus comprising:an inlet chamber for connection to a primary supply of air or other breathable gas at a pressure at or above a minimum treatment pressure;an outlet chamber for communicati

[ What is claimed is:] [1.]1. A pressure control apparatus for CPAP treatment or assisted respiration, said apparatus comprising:an inlet chamber for connection to a primary supply of air or other breathable gas at a pressure at or above a minimum treatment pressure;an outlet chamber for communication with a mask;a diaphragm for communication with a portion of said outlet chamber;means to provide a predetermined force to said diaphragm;a first valve means operable to open a flow path between said outlet chamber and said inlet chamber in response to deflection of said diaphragm in a first direction; anda second valve means operable to provide an exhaust path from said outlet chamber to atmosphere in response to deflection of said diaphragm in a second direction opposite to said first direction;wherein when the pressure of gas in said outlet chamber produces a force on the diaphragm below said predetermined force the force differential on said diaphragm causes it to deflect in said first direction and cause said first valve means to open and to case an equilibrating flow of gas from said inlet chamber, and further wherein when the pressure of gas in said outlet chamber produces a force on the diaphragm above said predetermined force the force differential on said diaphragm causes it to deflect in said second direction and cause said second valve means to open;wherein said reference force providing means comprises a predetermined mass adapted to urge said diaphragm in said first direction;wherein said apparatus includes a control valve member slidable within a control valve member housing; andwherein said apparatus includes weights adapted to be added to said control valve member to vary said mass.