Heat retaining appliance
US4198559A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1977 |
| Grant date | Apr 15, 1980 |
| Priority date | — |
| Expiry date | Dec 20, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47J36/2494
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An appliance is provided which is capable of transmitting heat retained therein to cooked food placed in the appliance, so that the food can be kept hot when an electrical cord used for initially causing the appliance to be electrically heated is disconnected therefrom. The appliance includes an outer casing and a removable cover, both of which are made of materials that retard heat loss from the appliance, preferably non-metallic materials. It further includes a housing enclosed by the casing and cover and made of a non-metallic material, such as plastic, in which a non-metallic heat retaining material, such as wax, is confined. Disposed throughout the heat retaining material is a resistance heater, which is removably connected to the electrical cord for melting the material, so that the heat of fusion of the melted material may be transmitted into the food to reduce its cooling rate after the heater is disconnected from the cord.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.