US3683058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared burners and high efficiency radiant plates
Assignee: Individual
•
Filing: 1969-08-25
•
Granted: 1972-08-08
•
Expires: 1989-08-25
Abstract
Abstract The disclosure relates to radiant ceramic plates for gas burners having a multiplicity of passages therethrough for conducting a combustible gas mixture from one surface of the plate to an opposite surface adjacent which combustion of the gas takes place. Both surfaces of the plate are provided with a repetitive pattern of indentation and the patterns of the two surfaces may be the same or different, thereby enabling the plates to be used with either side facing outwardly in the direction of desired infrared radiation.
Inventors
- 👤 Maurice Partiot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:54
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
A method of manufacture of a ceramic plate for use in an infrared gas heater, said plate having an oblong shape and being formed of an abrasive ceramic material and having a multiplicity of through passages for conducting a combustible gas mixture between its opposite faces for combustion at a radiant face thereof, said method comprising in combination the steps of, molding said plate in said oblong shape from said abrasive ceramic material, forcing a multiplicity of pins through said material from one of said faces toward and through the opposite face, guiding the tips of said pins adjacent said opposite face into respective apertures of a die plate and forming in said opposite surface of said plate a plurality of indentations which intersect at least some of said through passages at an acute angle to their axes and to a depth greater than the depth of wear of the said pins adjacent their tips to thereby cut away a portion of the ends of said through passages which may be formed by the abraded ends of said pin so as to form an effective increase in the opening of said passages which at least partially compensates for the partial obturation resulting from pin wear.
Claim 2
Independent Claim
205 words
A method of manufacture of a ceramic plate for use in an infrared gas heater, said plate having an oblong shape and being formed of an abrasive ceramic material and having a multiplicity of through passages for conducting a combustible gas mixture between its opposite faces for combustion at a radiant face thereof, said method comprising in combination the steps of, molding said plate in said oblong shape from said abrasive ceramic material, forcing a multiplicity of pins through said material from one of said faces toward and through the opposite face, guiding the tips of said pins adjacent said opposite face into respective apertures of a die plate and forming in said opposite surface of said plate a plurality of indentations which intersect at least some of said through passages at an acute angle to their axes and to a depth greater than the depth of wear of the said pins adjacent their tips to thereby cut away a portion of the ends of said through passages which may be formed by the abraded ends of said pin so as to form an effective increase in the opening of said passages which at least partially compensates for the partial obturation resulting from pin wear.
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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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |