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US 5,513,401 AGranted
Watermattress apparatus
AssigneeFrance Bed Co., Ltd.
InventorsTakeo Abe, Shoji Kawamura
Life of this patent
Estimating the term…
Abstract
A watermattress apparatus has a cushion body which is elastically compressed when a load has been exerted thereon. A case is laminated on the upper surface of the cushion body. The case has upper and lower surfaces and a receiving portion opening to the upper surface. A water bag formed of a flexible waterproof sheet and containing a liquid therein is received in the receiving portion. An envelope covers the laminated cushion body and case.
Claims15
A watermattress apparatus comprising:
- a cushion body being elastically compressed when a load has been exerted thereon;
- a case having an upper and a lower surface and a receiving portion opening to the upper surface, the lower surface being provided on an upper surface of the cushion body;
- a water bag formed of a flexible waterproof sheet, containing a liquid therein, and received in the receiving portion of the case;
- the water bag having a double structure including an inner bag containing the liquid, and an outer bag receiving the inner bag, and further comprising absorbing means provided between the inner and outer bags for absorbing liquid that leaks from the inner bag;
- and
- an envelope covering the cushion body and case.
3 more elements
A watermattress apparatus comprising:
- a case having upper and lower surfaces and a receiving portion opening to the upper surface;
- a water bag formed of a flexible waterproof sheet, containing a liquid therein, and received in the receiving portion;
- inner absorbent means provided in the receiving portion for absorbing a liquid which has leaked from the water bag to the receiving portion;
- a waterproof sheet covering the upper side of the case for preventing the liquid from leaking from the receiving portion to an outside thereof;
- and
- an envelope covering the case.
3 more elements
Dependencies are inferred from the claim text.