Inflatable cushion and air valve for same
AssigneeIpx Pty Ltd
InventorMohammed Helou
Life of this patent
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Abstract
An inflatable cushion including: an inflatable body, having an upper surface and a lower surface, said body including an air-impermeable skin defining a chamber, an elastic foam core within said chamber and a sealable air valve; and an external elastic foam layer substantially covering at least one of said upper and lower of surfaces; wherein: the foam core is formed of a foam having a density of between about 15 kg/m3 and about 35 kg/ma and a hardness of between about 25 newtons and about 45 newtons; and the foam layer is formed of a foam having a density of between about 35 kg/m3 and about 65 kg/m3 and a hardness of between about 35 newtons and about 95 newtons.
Claims12
A valve assembly including:
- a housing having a first chamber extending from a first open end and a second chamber extending from a second open end, said second chamber being in open communication with the first chamber;
- a valve plug, at least a portion of which is located within the second chamber, and which is adapted to seal the second open end, wherein the valve plug includes a plurality of ribs extending radially from an intermediate section;
- a valve actuator, at least a portion of which is located within the first chamber, wherein the valve actuator includes a plurality of radially extending ribs adjacent a first end of the valve plug;
- and
- a first biasing means adapted to bias the valve actuator back towards its original position after being pressed by a user;
- wherein said valve plug and said valve actuator are adapted so that, upon a single push of the valve actuator, the valve plug moves from a valve-open position to a valve-closed position and upon a subsequent push of the valve actuator, the valve plug moves from a valve-closed position to a valve-open position;
- wherein the second chamber includes an internal surface having a plurality of substantially uniform channels adapted to receive the ribs of the valve plug and the ribs of the valve actuator;
- wherein the channels, the ribs of the valve plug and the ribs of the valve actuator are configured so as to enable the ribs to move along said channels when valve actuator is pushed;
- and
- wherein the channels and the ribs of the valve plug are configured so that, when the valve plug moves a predetermined distance along the channels, the ribs of the valve plug exit the channels and the valve plug is caused to rotate within the second chamber under the influence of a second biasing means.
Dependencies are inferred from the claim text.