Heat storage dish

Claim 2

A heat storage dish comprising upper and lower dish walls having a generally complementary peripheral configuration, said walls being secured together at their peripheries with the remainder of the walls being spaced from each other to define a cavity therebetween, a heat storage plate positioned in said cavity between said walls, said plate having at least two elongated generally rectangular openings formed therein; means respectively associated with said openings and secured to said upper wall and extending through said openings for supporting said plate against said upper wall, said means each comprising an inverted U-shaped channel having a base and a pair of spaced leg portions, said base being secured to said upper wall and said legs extending downwardly therefrom through their associated openings; said legs having lower ends, including a pair of oppositely directed flanges extending outwardly from said legs below said plate and on which said dish is supported; and heat insulating material positioned in said cavity between said plate and said bottom wall extending entirely across said plate and beneath said channels to resist heat transfer from the plate through said bottom wall.

Claim 3

A heat storage dish as defined in claim 1 wherein said plate has a bottom surface including recesses adjacent said opening for receiving said flanges.

Claim 4

A heat storage dish as defined in claim 1 wherein said bottom wall includes a concave base portion curving towards said upper wall.

Claim 5

A heat storage dish as defined in claim 3 wherein said concave bottom wall has an expansion deformation formed therein aligned with and extending into said opening.

Claim 6

A heat storage dish as defined in claim 4 wherein said expansion deformation comprises a heat section of the wall defining a triangular channel in cross section opening outwardly of the bottom wall.

Claim 7

A heat storage dish as defined in claim 3 wherein said dish is circular in plan and said base portion is also circular in plan, said bottom wall having an annular support shoulder formed therein about the periphery of said base portion and an outwardly slanting peripheral wall portion extending from said shoulder to the peripheral edge of the bottom wall wherein the bottom wall is secured to said top wall.

Claim 8

A heat storage dish comprising upper and lower dish walls having a generally complementary peripheral configuration, said walls being secured together at their peripheries with the remainder of the walls being spaced from each other to define a cavity therebetween; a heat storage plate positioned in said cavity between said walls, said plate having a pair of elongated generally rectangular openings formed therein; a pair of inverted U-shaped channels respectively associated with said openings and located in said cavity, said channels each having a base portion secured to said upper wall and a pair of spaced leg portions extending downwardly through its associated opening, said channels each having a pair of opposed flanges integrally formed with said legs and extending perpendicularly outwardly therefrom below said plate thereby to support said plate against said upper wall; said legs having a length substantially equal to the thickness of said plate whereby said plate is held closely against the upper wall throughout substantially its entire extent to insure uniform heat transfer therebetween; said bottom wall being spaced from said plate throughout its entire extent; and a layer of heat insulating material positioned in said cavity and extending entirely across said plate beneath said channels between the plate and the bottom wall.

Claim 9

A heat storage dish comprising upper and lower dish walls having a generally complementary peripheral configuration, said walls being secured together at their peripheries with the remainder of the walls being spaced from each other to define a cavity therebetween; a heat storage plate positioned in said cavity between said walls, said plate having a pair of elongated generally rectangular openings formed therein; a pair of inverted U-shaped channels respectively associated with said openings and located in said cavity, said channels each having a base portion secured to said upper wall and a pair of spaced leg portions extending downwardly through its associated opening, said channels each having a pair of opposed flanges integrally formed with said legs and extending perpendicularly outwardly therefrom below said plate thereby to support said plate against said upper wall; said legs having a length substantially equal to the thickness of said plate whereby said plate is held closely against the upper wall throughout substantially its entire extent to insure uniform heat transfer therebetween; said bottom wall being spaced from said plate throughout its entire extent; and a layer of heat insulating material positioned in said cavity and extending entirely across said plate beneath said channels between the plate and the bottom wall.

Claim 10

A heat storage dish as defined in claim 7 wherein said plate has a bottom surface including recesses formed therein on opposite sides of said openings for receiving said flanges.

Claim 11

A heat storage dish as defined in claim 7 wherein said bottom wall includes a concave base below said plate which curves towards the plate and opens outwardly of the dish.

Claim 12

A heat storage dish as defined in claim 9 wherein said concave bottom wall has an expansion deformation formed therein aligned with and extending into said opening.

Claim 13

A heat storage dish as defined in claim 10 wherein said expansion deformation comprises a heat section of the wall defining a triangular channel in cross section opening outwardly of the bottom wall.

Claim 14

A heat storage dish as defined in claim 9 wherein said dish is circular in plan and said base portion is also circular in plan, said bottom wall having an annular support shoulder formed therein about the periphery of said base portion and an outwardly slanting peripheral wall portion extending from said shoulder to the peripheral edge of the bottom wall wherein the bottom wall is secured to said top wall.

Claim 15

A heat storage dish as defined in claim 8 including heat insulating material positioned in said cavity between said plate and said bottom wall extending entirely across said plate to resist heat transfer from the plate through said bottom wall.