Fractional inspiratory oxygen monitoring valve apparatus

Claim 2

Monitoring valve apparatus for use in respiratory systems and the like, comprising a tubular body member having a through passage adapted for connection in a communication through which a controlled gas is delivered to a patient, a tubular sleeve member Generally radially on said body member having a branch passage opening out of said through passage, a normally closed valve in said branch passage; and a tubular activating stem insertable in the open end of said branch passage having means for opening said valve to bleed controlled gas under pressure from said through passage through said activating stem for a desired purpose, one of said sleeve and stem being of resilient plastic dimensioned to resiliently interfit and engage the other in frictionally held sealing relationship upon a predetermined amount of engagement.

Claim 3

Monitoring valve apparatus according to claim 1, wherein said valve has a valve stem projecting outwardly of said branch passage and engaged by the inner end of said activating stem, when inserted inwardly from the outer end of said branch passage, to effect unseating of said valve.

Claim 4

Monitoring valve apparatus according to claim 2, wherein said activating stem has a tapered end portion frictionally held in the outer end of said branch passage upon a predetermined amount of insertion thereinto, in which position the inner end of said activating stem engages said valve stem to hold said valve unseated.

Claim 5

Monitoring valve apparatus according to claim 1, wherein one end of said tubular body portion is circularly tapered toward the outer end thereof to sealingly engage in the end bore of a hose.

Claim 6

Monitoring valve apparatus according to claim 1, wherein the end of said tubular body portion opposite said one end is cylindrical and has in spaced relation to the outer end of said cylindrical end an external peripheral groove, and wherein a tubular connecting member of resilient material is provided having at one end an interior sealing rib which is expandible over said cylindrical end for engagement in said peripheral groove and having at its opposite end an expandible interior sealing rib for connection to another member in said system.

Claim 7

Monitoring valve apparatus according to claim 1, wherein said activating stem has a longitudinal passage therein and a transverse passage therethrough intersecting said longitudinal passage, through which controlled gas under pressure is bled from said through passage in said fitting when said valve is unseated by said activating stem.

Claim 8

Monitoring valve apparatus for use in respiratory systems and the like, comprising a fitting having a through passage adapted for connection in a communication through which a controlled gas is delivered to a patient, a branch passage opening out of said through passage, and a normally closed valve in said branch passage; and a tubular activating stem insertable in the open end of said branch passage for opening said valve to bleed controlled gas under pressure from said through passage through said activating stem for a desired purpose, said fitting comprising a tubular body portion containing said through passage, a transverse opening through the wall of said tubular portion, and a sleeve sealingly secured in said opening and providing said branch passage, wherein the end of said tubular body portion opposite said one end is cylindrical and has in spaced relation to the outer end of said end portion an external peripheral groove, and wherein a tubular connecting member of resilient material is provided with a pair of axially spaced interior sealing ribs, one of which is expandible over the cylindrical end of said tubular body portion to engage in said peripheral groove and the other of which sealingly engages the outer end face of said cylindrical end of the tubular body portion.

Claim 9

Monitoring valve apparatus for use in respiratory systems and the like, comprising a fitting having a through passage adapted for connection in a communication through which a controlled gas is delivered to a patient, a branch passage opening out of said through passage, and a normally closed valve in said branch passage; and a tubular activating stem insertable in the open end of said branch passage for opening said valve to bleed controlled gas under pressure from said through passage through said activating stem for a desired purpose, said fitting comprising a tubular body portion containing said through passage, a transverse opening through the wall of said tubular portion, and a sleeve sealingly secured in said opening and providing said branch passage, wherein the end of said tubular body portion opposite said one end is cylindrical and has in spaced relation to the outer end of said end portion an external peripheral groove, and wherein a tubular connecting member of resilient material is provided with a pair of axially spaced interior sealing ribs, one of which is expandible over the cylindrical end of said tubular body portion to engage in said peripheral groove and the other of which sealingly engages the outer end face of said cylindrical end of the tubular body portion.