초록 ▼

A dual valve for an inhalation device which permits air to be withdrawn from the device upon inhalation but which prevents the flow of air into the device upon exhalation. The valve includes a central opening in communication with the device, and a plurality of openings about the central opening in

A dual valve for an inhalation device which permits air to be withdrawn from the device upon inhalation but which prevents the flow of air into the device upon exhalation. The valve includes a central opening in communication with the device, and a plurality of openings about the central opening in communication with the surrounding environment. The valve also includes a central flexible flapper valve which extends across and controls the flow of air through the central opening, and a plurality of outer flexible flapper valves which extend across and control the flow of air through the outer openings. In use, inhalation by a user opens the central flexible flapper valve to allow the free flow of air from the inhalation device while the outer flapper valves remain closed. Correspondingly, exhalation by the user opens the outer flexible flapper valves from their seats to exhaust air to the surrounding atmosphere while the central flexible valve remains closed.

대표청구항 ▼

In an inhalation device having an outlet tubing having one end connected to the outlet of the device and a mouthpiece connected to the other end of said tubing, a dual valve for inhalation and exhalation connected in said tubing which permits air to be withdrawn from the device upon inhalation but w

In an inhalation device having an outlet tubing having one end connected to the outlet of the device and a mouthpiece connected to the other end of said tubing, a dual valve for inhalation and exhalation connected in said tubing which permits air to be withdrawn from the device upon inhalation but which prevents the flow of air into the device upon exhalation, comprising: one disk having a central opening in communication with said tubing and said device, valve seat means operatively connected to the periphery of said central opening, and a plurality of openings about said central opening in communication with the surrounding environment, another disk having a central opening in communication with said tubing and said mouthpiece, a plurality of openings about said central opening in communication with said tubing and said mouthpiece, and a plurality of valve seats operatively connected to the periphery of each of said outer openings, said disks being juxtaposed to one another with said central openings and outer openings in axial alignment, a flexible disk between and in contact with said disks including a central, flexible flapper valve which extends across said central openings and seats on said valve seat means to control the flow of air therethrough, and a plurality of outer flexible flapper valves which extend across said outer openings and seat on said plurality of valve seats, respectively, to control of flow of air therethrough, said central opening in said another disk being of a size to allow said central flexible flapper valve to pass therethrough and each of said one disk being of a size to allow said outer flexible flapper valves to pass therethrough, connecting means for connecting said disks between the tubing and mouthpiece with said one disk in communication with the device through the tubing and with said another disk in communication with said mouthpiece, wherein said central flexible valve is urged from said central valve seat to open said central openings upon inhalation to allow the flow of air from the inhalation device while said outer flexible flapper valves close said outer openings, and wherein said outer flexible flapper valves are urged from their seats to open said outer openings upon exhalation to exhaust air to the surrounding atmosphere upon exhalation while said central flexible flapper valve closes said central openings and prevents the flow of air into the inhalation device, to thereby inhibit excessive carbon dioxide and water vapor build up therewithin.