Mattress having an upper internal material-containing chamber
US4068335A · kind A · utility
Inventor
Key dates
| Filing date | Sep 17, 1976 |
| Grant date | Jan 17, 1978 |
| Priority date | — |
| Expiry date | Sep 17, 1996 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C27/085
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A water bed mattress for supporting an individual in an inclined position which is comprised of an upper sheet and a lower sheet and both of which are formed of a foldable, flexible plastic material. A continuous outer side wall extends between and is secured in operative relationship to the upper and lower sheets. A continuous panel is operatively secured to the upper sheet inwardly of the peripheral end margin of the upper sheet by means of a first continuous seal. This latter panel is also secured to the upper sheet at a point in close proximity to the peripheral margin thereof by a second continuous peripheral seal in order to form a material-containing chamber which is bounded by a portion of the upper sheet between the first and second seals. A liquid chamber is bounded by the lower sheet, the side wall and the remaining portion of the upper sheet and said panel. This material-containing chamber continuously extends around the periphery of the upper sheet so that the peripheral portion of the upper sheet is supported by material in the material-containing chamber. In a preferred aspect of the invention, the material-containing chamber is filled with air and the liquid chamber…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.