Air bag

Claim 1

A manually operable resuscitator bag of one piece integral molded construction, formed of thermoplastic material, and comprising: a generally elongated football shape, defining an enlarged center portion of maximum diameter, and two tapering end portions of progressively reducing diameter; an opening at each end and inlet means at one said end, and outlet means at the other said end; first fold-rings formed at about the transition from said centre portion to each of said tapering end portions, said first fold-rings comprising wall portions of reduced thickness and defining flex zones; second fold-rings in each said tapering end portion comprising wall portions of reduced thickness, defining flex zones in said tapering end portions whereby said end portions may be telescoped, said second fold-rings being of reduced diameter relative to said first fold-rings; ridges of thickened wall section between such fold-rings; said centre portion having a wall thickness substantially equal to the thickness of said ridges in said tapering end portions between said rings; a plurality of longitudinal ribs formed on the outer surface of said centre portion at spaced intervals around the circumference thereof, and terminating short of said first fold-rings, and further reinforcing ribs formed in said two tapering end portions, said further ribs extending from said first to said second fold-rings, providing increased resiliency and a rapid recovery for the shape of the bag after compressing whereby the bag may be gradually manually compressed, and rapidly released without substantial delay caused by a delayed recovery of the shape of said bag.