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US 4,357,725 AGranted
Body-support devices
AssigneeAB Wilh. Becker
InventorLars G. W. Ahlm
Life of this patent
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AssigneeAB Wilh. Becker
InventorLars G. W. Ahlm
Estimating the term…
A body-support device for use as a mattress or cushion for hospital beds comprises an inner core (10) of soft, resilient plastics material having predominantly open cells, said core having two mutually opposite major surfaces (10a,10b) connected together by side surfaces (10c). Each major surface (10a,10b) is covered with a thin layer (11,12) of soft, resilient plastics material having predominantly closed cells, said thin layers (11,12) also covering at least two side surfaces of said inner core. The surfaces of the thin layers (11,12) remote from the core (10) are covered with a plastics foil (14,15). The uncovered side surfaces of the inner core serve to enable air to pass into and out of the inner core. The plastics foil provides the body-support device with a surface which can readily be kept clean. The thin layers (11,12) afford a better and stronger bonding of the plastics foil to the body-support device.
A bed mattress or cushion, comprising a relatively thick core made of a soft, resilient plastics material with predominantly open cells and having a substantially parallelepipedic shape with two, substantially rectangular, mutually opposite major surfaces and two longside surfaces and two shortside surfaces extending between said major surfaces, said major surfaces and said longside surfaces of said core being covered with a relatively thin layer of a soft, resilient plastics material with predominantly closed cells bonded to said major surfaces and said longside surfaces of said core, said relatively thin layer of a soft, resilient plastics material being covered with a thin, substantially impermeable, plastics foil bonded to said thin layer of a soft, resilient plastics material with predominantly closed cells, and said shortside surfaces of said core being exposed to the ambient air.
Dependencies are inferred from the claim text.