초록 ▼

A multi-layered heating device including a first container having a top layer and a bottom layer. A second container, containing heat retaining fluid, is positioned inside the first container and adjacent to the top layer thereof. Adjacent to the second container is an electrical heating element, an

A multi-layered heating device including a first container having a top layer and a bottom layer. A second container, containing heat retaining fluid, is positioned inside the first container and adjacent to the top layer thereof. Adjacent to the second container is an electrical heating element, and a layer of padding material is positioned between the electrical heating element and the bottom layer of the first container. A preferred embodiment of the heating device includes at least one thermostat, with the second container having a first layer and a second layer wherein at least one portion of each of the layers are secured together to form at least one depression which is devoid of the heat retaining fluid and which coincides with the at least one thermostat.

대표청구항 ▼

[ What is claimed is:] [1.] A heating device, comprising:a first container having a top layer and a bottom layer, said top layer and bottom layer secured together to form a first inner recess;a second container containing a heat retaining fluid, said second container having at least one area which i

[ What is claimed is:] [1.] A heating device, comprising:a first container having a top layer and a bottom layer, said top layer and bottom layer secured together to form a first inner recess;a second container containing a heat retaining fluid, said second container having at least one area which is devoid of said heat retaining fluid, said second container positioned inside said first inner recess and adjacent said top layer of said first container;an electrical heating element positioned inside said first inner recess of said first container and adjacent said second container for heating said heat retaining fluid;at least one thermostat connected to said heating element and positioned to coincide with said at least one area in said second container; andpadding material positioned inside said first inner recess and between said electrical heating element and said bottom layer of said first container.