Patent US4031353A successfully refreshed from Google Patents.
US4031353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric radiant heater
Assignee: EMPRESA DE REPRESENTACIONES UNIDAS SA
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Filing: 1975-04-09
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Granted: 1977-06-21
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Expires: 1995-04-09
Abstract
Abstract An improved radiant heater has a metal heating plate formed with at least one bulged portion surrounded by a flat transversely extending peripheral flange. Each of the bulged portions has a concave curved inner surface and a convex curved outer heat radiating surface. At least the entire concave surface of each bulged portion is covered with a coating of vitrified enamel and a printed circuit electric heating element is deposited on the enamel coating. A peripheral transition area is provided adjacent the intersection of each of the bulged portions and its surrounding flange. The transition areas are so shaped as to impart stress upon thermal deformation of the heating plate such that the enamel coating is compressed thereby increasing the dielectric resistance of the coating.
Inventors
- 👤 Eduardo Rueda Segura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:47
CPC Classifications
F; F24; F24C; F24C7/00; F24C7/04; F24C7/043; F24C15/00; F24C15/10; H; H05; H05B; H05B3/00; H05B3/20; H05B3/22; H05B3/26; H05B3/262
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
246 words
An electric heater comprising: metal heating plate having at least one curved bulged portion, each of said curved bulged portions being surrounded by a flat transversely extending peripheral flange, each of said curved bulged portions having a completely concave curved inner surface and a completely convex curved outer heat radiating surface, at least said concave curved inner surface having thereon a coating of dielectric vitrified enamel covering the whole of said concave curved inner surface and a printed circuit electrical resistance heating element deposited on said enamel coating; a thermal reflector plate having a bulged portion surrounded by a transversely extending flange; said heating plate and said thermal reflector plate being joined with the concavities of said heating plate and said thermal reflector plate facing each other, the thus joined heating plate and thermal reflector plate forming a heating assembly; means for energizing said heating element for heating said heating plate to radiate heat from said convex outer surface; means for supporting said heating assembly with said convex outer surface being exposed to a zone to be heated; said heating plate undergoing deformation of a thermal origin upon operation of said resistance heating element; and a peripheral transition area, adjacent the intersection of each of said bulged portions and its surrounding flange of said heating plate, said transition area being so shaped as to comprise means for imparting a stress, upon deformation of said heating plate, always compressing said enamel coating covering said concave inner surface.
Claim 2
Dependent Claim
246 words
An electric heater comprising: metal heating plate having at least one curved bulged portion, each of said curved bulged portions being surrounded by a flat transversely extending peripheral flange, each of said curved bulged portions having a completely concave curved inner surface and a completely convex curved outer heat radiating surface, at least said concave curved inner surface having thereon a coating of dielectric vitrified enamel covering the whole of said concave curved inner surface and a printed circuit electrical resistance heating element deposited on said enamel coating; a thermal reflector plate having a bulged portion surrounded by a transversely extending flange; said heating plate and said thermal reflector plate being joined with the concavities of said heating plate and said thermal reflector plate facing each other, the thus joined heating plate and thermal reflector plate forming a heating assembly; means for energizing said heating element for heating said heating plate to radiate heat from said convex outer surface; means for supporting said heating assembly with said convex outer surface being exposed to a zone to be heated; said heating plate undergoing deformation of a thermal origin upon operation of said resistance heating element; and a peripheral transition area, adjacent the intersection of each of said bulged portions and its surrounding flange of said heating plate, said transition area being so shaped as to comprise means for imparting a stress, upon deformation of said heating plate, always compressing said enamel coating covering said concave inner surface.
Claim 3
Dependent Claim
38 words
An electric heater as claimed in claim 1, further comprising a plurality of clips joining said flanges of said heating plate and said thermal reflector plate, each of said clips having a U-shaped configuration with bent outer ends.
Claim 4
Dependent Claim
166 words
An electric heater as claimed in claim 1, wherein said means for supporting said heating assembly comprises a frame, said frame comprises a front plate and a rear plate, said front plate having a rearwardly extending peripheral flange, said rear plate having a forwardly extending peripheral flange, said front and rear plates being joined with said respective flanges thereof overlapping to form a casing enclosing said heating assembly; screws extending through holes in said flanges of said heating plate and said thermal reflector and threading into connector elements fixed to said rear plate, said heating assembly thus being joined to said rear plate; said front plate having an opening therein through which extends said bulged portion of said heating plate; and a grate positioned over said bulged portion of said heating plate, said grate having bent threaded ends extending through holes in said front and rear plates and nuts threaded to said threaded ends, said front and rear plates thereby being joined to form said frame.
Claim 5
Dependent Claim
59 words
An electric heater as claimed in claim 3, wherein said front and rear plates are elongated on one side thereof to form a space laterally of said heating assembly; and further comprising a switch and thermostat mounted on said rear plate within said space, and controls arranged on said front plate and operatively connected to said switch and thermostat.
Claim 6
Dependent Claim
62 words
An electric heater as claimed in claim 1, wherein said heating plate has, around the periphery of said transversely extending flange thereof a rearwardly extending flange; said thermal reflector plate has, around the periphery of said transversely extending flange thereof, a forwardly extending flange; said heating plate and said thermal reflector plate being joined with said rearwardly and forwardly flanges thereof overlapping.
Claim 7
Dependent Claim
19 words
An electric heater as claimed in claim 5, wherein said heating plate has therein plural such curved bulged portions.
Claim 8
Dependent Claim
62 words
An electric heater as claimed in claim 1, wherein said heating assembly is supported with said flange of said heating plate aligned substantially vertically; and further comprising openings formed in upper and lower areas of said bulged portion of said heating plate, at positions therein adjacent said peripheral transition area, said openings permitting air to flow by convection through the heating assembly.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |