Low energy animal heating pad with directional heat transfer

Claim 1

A heating device for animals comprising: a) a top sheet including a generally flat surface with a downwardly sloped section terminating in a peripheral bonding section, said sheet being formed of a durable non-porous plastic member, said generally flat surface having grooves therein for draining urine and liquids therefrom; b) a bottom sheet having a generally flat surface, said top sheet and bottom sheets being bonded together at their periphery to define a hollow shell means for encapsulating a heating system and for providing a thermal chamber for storing heat; c) a heating system including a reflective insulation means substantially filling said shell means, said reflective insulation having a foil layer arranged to reflect, store and distribute heat to the top sheet of said shell means, and a bubble insulation layer below said foil layer for absorbing and precluding heat flow towards the bottom sheet; d) an electric heating circuit mounted on said first foil layer receiving electrical energy and converting said energy into heat to be reflected to the top sheet of said case means; e) connecting means connected to said circuit for connecting said circuit to a source of electric power, f) a thermal responsive switch interconnected between said heating circuit and said connecting means for detecting the temperature above said insulation and for interrupting the delivery of electric power to said circuit when the temperature of said pad reaches a preset maximum; and g) indicating means connected to said circuit for indicating when said heating device is drawing electric power.