Dispensing device for respiration apparatus having one or more floating valves operating according to an improved system with pivots free from mechanical connections

Claim 1

A dispensing device for a respiration apparatus, which comprises: (a) a compressed gas inlet means for connection to a source of compressed gas, a compressed gas outlet means for delivering compressed gas to a person and an expiration outlet means for exhausting gas during expiration thereof; and (b) control valve means for controlling the flow of compressed gas in response to the respiration of the user, comprising: (i) a first chamber, a blind supply diaphragm in said first chamber reciprocably movable between a normally closed position and an open position, an annular wall means enclosing said chamber and having an irregular engagement surface and an annular washer means in abutting engagement with said wall means engagment surface, said abutting wall means and washer means providing a labyrinth-like passage for seepage therethrough of said compressed gas from said gas inlet means into said chamber, the pressure of said seeped compressed gas acting upon one side of the supply diaphragm; first conduit means leading from said gas inlet to the other side of the supply diaphragm; second conduit means leading from said other side of the supply diaphragm to said gas outlet; said supply diaphragm being operable to establish communication between said first and second conduit means when moved to the open position and to cut off such communication when in said closed position; and an outlet in said first chamber; and (ii) a second chamber having an inlet and an outlet, third conduit means for establishing communication between said first chamber outlet and said second chamber inlet; service valve means for controlling flow of gas through said third conduit means and having an operating arm urged by spring force to a first position in which said service valve closes said third conduit, said operating arm being reciprocably movable between said first position and a second position in which said service valve means opens said third conduit means, and a control diaphragm in contact with said operating arm; and a fourth conduit means for establishing communication between said second chamber outlet and said compressed gas outlet means and said expiration outlet means, said control diaphragm being operable to move said operating arm against the spring force to the second position whenever the user of the device inhales compressed gas through said gas outlet means.