Abstract: A connector for use with threaded and push-on outlet couplings of pressurized gas supplies, the former having an exteriorly threaded cylindrical pipe termination and the latter having a tapering pipe termination, the connector comprising: a resilient tubular member, having a flat annular flange at one end and a narrower middle section; and, a cylindrical cap member having a threaded bore for engaging a threaded outlet coupling, partially closed at one end by an annular shoulder for pressing the flange into a sealing position between the cap member and the threaded coupling, the annular shoulder defining a bore enabling the cap member to be slidably retained in the narrower section and having an inwardly directed circular edge which can press a portion of the narrower section into a sealing position between the cap member and a push-on coupling after the flanged end of the tubular member has been pushed thereover, whereby the connector may be used with both threaded and push-on couplings.

Abstract: A breathing exerciser, comprising: first and second tubes; a lower cap member having bores for receiving one end of each of the tubes, the lower cap member having a passageway communicating between the first tube and a lower inlet/outlet opening; an upper cap member having bores for receiving the other ends of the tubes, and having a passageway communicating between both the tubes and an upper inlet/outlet opening; a floor member closing the lower end of the second tube; a floatable indicating member disposed in the second tube, the indicating member being upwardly movable during fluid flow into the upper inlet/outlet opening, through the first tube and out of the lower inlet/outlet opening, the amount of upward movement depending upon the rate of fluid flow; a valve assembly for adjusting the effective size of at least one of the inlet/outlet openings, for controlling the fluid flow rate required to move the indicating member over an effective range; and, openings in the second tube for calibrating the effec