Plural station resuscitator

Claim 1

Apparatus for resuscitating a plurality of patients comprising a plurality of face mask assemblies each of which is operable to be operatively connected with a patient so as to permit fresh air to be supplied to the lungs of such patient, means for delivering successive volumes of fresh air under pressure to each of said face mask assemblies at a desired cyclical frequency wherein each cycle includes said fresh air delivery as a minor part thereof, stale air exhaust valve means for permitting air expelled from the lungs of each patient during the remaining major part of each cycle associated therewith to be exhausted to atmosphere through the associated face mask assembly, means operatively associated with each face mask assembly for selectively supplying a respiratory medicament dosage into the fresh air delivered to each face mask assembly, and means operatively associated with each face mask assembly for indicating a minor part of each cycle associated therewith during which fresh air is delivered thereto so that the associates selective medicament delivering means is selected to deliver medicament only during the minor cycle part when said fresh air is delivered, said fresh air delivering means comprising a frame, a plurality of expandable and retractable positive displacement air chamber assemblies carried by said frame, cam track means movably carried by said frame, means for operatively connecting said cam track means with each of said air chamber assemblies so that each air chamber assembly is moved during the movement thereof through repetitive cycles each of which includes an expanded movement and a retracted movement during a time period of less than one-half of the time period of the entire cycle, fresh air inlet check valve means for controlling the flow of fresh air into each air chamber assembly during each expanded movement thereof, means for conducting fresh air from each of said air chamber assemblies to an associated face mask assembly during each retracted movement of the associated air chamber assembly and for preventing air flow therebetween in the opposite direction, means for moving said cam track means so that each of said air chamber assemblies is moved through repetitive cycles each of which includes (1) an expanded movement to cause fresh air to flow therein past the associated fresh air inlet check valve means and (2) a retracted movement during the aforesaid less than one-half cycle time period to cause fresh air therein to flow therefrom through the associated face mask assembly into the lungs of a patient operatively connected therewith so as to be expellable from the lungs of the patient through the associated face mask assembly and past the associated stale air exhaust valve means during the greater than one-half cycle time period when the associated air chamber assembly is not being moved through a retracted movement.