Water bed mattress with regulated heating means therefor and controlling the heat loss therefrom and the method of making the same
US4097717A · kind A · utility
Inventor
Key dates
| Filing date | May 17, 1976 |
| Grant date | Jun 27, 1978 |
| Priority date | — |
| Expiry date | May 17, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/0014
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A water bed mattress with means for heating the same and with means for controlling heat losses therefrom. In one embodiment of the invention, the water bed mattress comprises a pair of upper and lower sheets connected by a peripheral side wall to form a water chamber therein. An electrically energizable heating element is located adjacent one of the sheets and is enclosed by a piece of plastic forming a heat-generating chamber therein. An electrical cord extends outwardly from this heat-generating chamber for ultimate connection to a source of electrical power. The actual electrically energizable heating means may adopt a variety of forms including a coil located in the heat generating chamber, or otherwise a strip heater or similar forms of heating elements. A heat sensor may be located within the water chamber and is connected to a feedback controller which is in turn connected through a temperature regulator, such as a variostat, to the heating means. In this way, constant temperature is maintained in the water within the water chamber. The present invention also provides various embodiments with means for reducing heat loss from the water chamber including a heat insulating st…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.