Abstract: An improved waterbed safety liner includes a base sheet which underlays the watermattress, and sidewalls extending upwardly from the edges of the base sheet to surround the watermattress and contain any liquid leaking therefrom. In one embodiment, an inflatable air chamber is integrally formed with the upper extent of the sidewalls to overlay a portion of the watermattress and provide buoyant edge support thereon. In another embodiment, a chamber formed integrally with the sidewalls of the safety liner are equal in height to the height of the watermattress, and are inflated either with air or with resilient foam material.

Abstract: A watermattress construction includes upper and lower sheets of waterproof material sealed at their confronting edges to define a liquid containing bladder. A plurality of baffle panels are situated within the bladder and disposed in parallel, spaced apart relationship. Extending from each lateral edge of each baffle panel are a pair of leg panels which are buttwelded to the adjacent upper or lower sheet to define a triangular configuration therewith. The triangular assembly is easily distorted by tensile stress between the baffle and the upper or lower sheet, the stress being converted to shear stress exerted on the buttwelds joining the legs panels to the upper or lower sheets.