US3835832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-cleaning burner cover, especially for household appliances
Assignee: Individual
•
Filing: 1973-05-21
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Granted: 1974-09-17
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Expires: 1993-05-21
Abstract
Abstract The present burner cover is provided on its top surface with a sheet metal cover layer which is either flanged or crimped around the edge of the cover or the cover has a recess in its top to receive the sheet metal layer, whereby the edge of the cover is preferably upset inwardly to hold the layer in position. The layer is made of a material having an expansion coefficient and heat conductivity larger than the cover itself, whereby an air space is formed between the cover layer during heating due to the bulging of the cover layer which will contract again when the burner is shut off to facilitate the removal of food spills.
Inventors
- 👤 F Welcker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:17
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
130 words
A burner cover, especially for household appliances, comprising a burner cover body made of a metal having a given temperature expansion coefficient, a cover sheet on said burner cover body made of a metal having a larger temperature expansion coefficient than said first mentioned coefficient and also a larger heat conductivity than said burner cover body, said cover sheet further having a central portion and a circumferential edge portion, and means for rigidly securing said circumferential edge portion of the cover sheet to the burner cover body to substantially prevent relative movement between the burner cover body and the circumferential edge portion of the cover sheet, whereby the cover shEet bulges upwardly with its central portion in response to heat and flattens out again when the burner is shut off.
Claim 2
Dependent Claim
130 words
A burner cover, especially for household appliances, comprising a burner cover body made of a metal having a given temperature expansion coefficient, a cover sheet on said burner cover body made of a metal having a larger temperature expansion coefficient than said first mentioned coefficient and also a larger heat conductivity than said burner cover body, said cover sheet further having a central portion and a circumferential edge portion, and means for rigidly securing said circumferential edge portion of the cover sheet to the burner cover body to substantially prevent relative movement between the burner cover body and the circumferential edge portion of the cover sheet, whereby the cover shEet bulges upwardly with its central portion in response to heat and flattens out again when the burner is shut off.
Claim 3
Dependent Claim
25 words
The burner cover according to claim 1, wherein said burner cover body is made of cast iron and the cover sheet is made of aluminum.
Claim 4
Dependent Claim
24 words
The burner cover according to claim 1, wherein said burner cover body is made of brass and the cover sheet is made of aluminum.
Claim 5
Dependent Claim
50 words
The burner cover according to claim 1, wherein said means for rigidly securing said cover sheet to the burner cover body comprise a radially outwardly extending flange rim around said burner cover body, said cover sheet having an outer rim crimped around said flange rim of said burner cover body.
Claim 6
Dependent Claim
59 words
The burner cover according to claim 1, wherein said burner cover body has a top surface, said means for ridigly securing said cover sheet to said burner cover body comprising a relatively flat recess in said top surface and an upwardly extending rim surrounding said recess for providing a rigid location fit of said cover sheet in said recess.
Claim 7
Dependent Claim
23 words
The burner cover according to claim 5, wherein said upwardly extending rim is slightly upset inwardly for holding the cover sheet in place.
Claim 8
Dependent Claim
30 words
The burner cover according to claim 1, wherein said cover sheet is provided with grooves or recesses in one side thereof, said grooves or recesses facing said burner cover body.
Claim 9
Dependent Claim
22 words
The burner cover according to claim 1, wherein said cover sheet has a polished surface facing away from said burner cover body.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |