US4034206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Range top element
Assignee: EHD Inc
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Filing: 1976-05-11
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Granted: 1977-07-05
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Expires: 1996-05-11
Abstract
Abstract A heating element assembly having a thermally conductive ceramic top sheet against the underside of which is positioned a thermally and electrically insulating base pod having a recess containing a loosely secured, planar array of thin, flat strips of apertured, foil-like, electrical resistance material. The array is spaced from the ceramic sheet a predetermined distance and disposed in such a manner as to provide a large amount of heat radiating surface adjacent to the underside of the ceramic top. The spacing between the array and the ceramic top sheet enhances even radiant heating of the ceramic top. Such a heating element assembly is low in cost and high in thermal efficiency, having particular utility as a burner for a ceramic top electric range.
Inventors
- 👤 Glen H. Penrod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:34
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/68; H05B3/74; H05B3/748
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
151 words
A heating element assembly comprising a thermally conducting electrically insulating rigid ceramic sheet; a block of thermally and electrically insulating material, a face of said block having a wall projecting therefrom to define a recess in said block, said block being positioned against said ceramic sheet such that said recess and said sheet define a chamber; and a planar heating element of apertured foil-like electrical resistance material, said element being contained in said chamber and being spaced from and in noncontiguous relationship with said ceramic sheet, the periphery of said element defining a plane parallel to said ceramic sheet, said wall containing a plurality of cavities, said cavities each containing a peripheral portion of said element, said planar heating element of apertured foil-like electrical resistance material being in the form of an array of thin flat strips, said strips being equidistantly spaced from each other and electrically connected to each other.
Claim 2
Dependent Claim
151 words
A heating element assembly comprising a thermally conducting electrically insulating rigid ceramic sheet; a block of thermally and electrically insulating material, a face of said block having a wall projecting therefrom to define a recess in said block, said block being positioned against said ceramic sheet such that said recess and said sheet define a chamber; and a planar heating element of apertured foil-like electrical resistance material, said element being contained in said chamber and being spaced from and in noncontiguous relationship with said ceramic sheet, the periphery of said element defining a plane parallel to said ceramic sheet, said wall containing a plurality of cavities, said cavities each containing a peripheral portion of said element, said planar heating element of apertured foil-like electrical resistance material being in the form of an array of thin flat strips, said strips being equidistantly spaced from each other and electrically connected to each other.
Claim 3
Dependent Claim
17 words
A heating element assembly according to claim 1, wherein said material is an expanded metal foil grid.
Claim 4
Dependent Claim
17 words
A heating element assembly according to claim 1, wherein said element is integrally formed by powder rolling.
Claim 5
Dependent Claim
17 words
A heating element assembly according to claim 1, wherein said element is integrally formed by photographic etching.
Claim 6
Dependent Claim
18 words
A heating element assembly according to claim 1, wherein said strips are electrically connected in end-to-end series relation.
Claim 7
Dependent Claim
18 words
A heating element assembly according to claim 1, wherein said strips are straight and parallel to each other.
Claim 8
Dependent Claim
24 words
A heating element assembly according to claim 1, wherein said strips are circular, said strips being arranged to form a series of concentric circles.
Claim 9
Dependent Claim
36 words
A heating element according to claim 1, wherein said wall defining said recess has at least one aperture, said aperture being useful for electrically connecting said array to an electrical power source external to said chamber.
Claim 10
Dependent Claim
14 words
A heating element assembly according to claim 8, wherein said chamber is generally cylindrical.
Claim 11
Dependent Claim
153 words
A heating element assembly comprising a thermally conducting electrically insulating rigid ceramic sheet; a block of thermally and electrically insulating material, a face of said block having a wall projecting therefrom to define a recess in said block, said block being positioned against said ceramic sheet such that said recess and said sheet define a chamber; and a planar heating element of apertured foil-like electrical resistance material, said element being contained in said chamber and being spaced from and in noncontiguous relationship with said ceramic sheet, said element defining a plane parallel to said ceramic sheet, said heating element of apertured foil-like electrical resistance material being in the form of an array of thin flat strips of constant width, said strips being equidistantly spaced from each other and electrically connected in end to end series relation, said wall containing a plurality of cavities, said cavities each containing a peripheral portion of said array.
Claim 12
Dependent Claim
153 words
A heating element assembly comprising a thermally conducting electrically insulating rigid ceramic sheet; a block of thermally and electrically insulating material, a face of said block having a wall projecting therefrom to define a recess in said block, said block being positioned against said ceramic sheet such that said recess and said sheet define a chamber; and a planar heating element of apertured foil-like electrical resistance material, said element being contained in said chamber and being spaced from and in noncontiguous relationship with said ceramic sheet, said element defining a plane parallel to said ceramic sheet, said heating element of apertured foil-like electrical resistance material being in the form of an array of thin flat strips of constant width, said strips being equidistantly spaced from each other and electrically connected in end to end series relation, said wall containing a plurality of cavities, said cavities each containing a peripheral portion of said array.
References Cited (Backward Citations)
US2231236A
Cited
US2640906A
Cited
US3372487A
Cited
US3710076A
Cited
US3749883A
Cited
US3833793A
Cited
US3798419A
Cited
US3912905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |