Patent ID: 9364386
Filing Date: 2016-06-14
CPC Classification: A47C,A61G,A61H

Claim Text:
1. A cell for a support surface, the cell comprising: an outer casing; a lower chamber defined in part by the outer casing, the lower chamber including a support material therein; an upper chamber having an upper surface, at least one perforation being defined in the upper surface, the at least one perforation being located on a patient facing side of the cell, the at least one perforation permitting fluid communication between the upper chamber and an exterior of the cell; and a partition separating the lower chamber and the upper chamber, the partition defining a portion of the lower chamber and a portion of the upper chamber, wherein, when pressure in the lower chamber is above a predetermined threshold pressure, fluid communication between the lower chamber and the upper chamber is permitted such that air from lower chamber enters the upper chamber and is expelled through the at least one perforation, and wherein, when pressure in the lower chamber is below the predetermined threshold pressure, fluid communication between the lower chamber and the upper chamber is restricted.