US3604894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical infrared radiation system
Assignee: Individual
•
Filing: 1968-05-22
•
Granted: 1971-09-14
•
Expires: 1988-05-22
Abstract
Abstract A heating assembly of improved efficiency wherein electrically energized heating elements are disposed between the peaks of ridged heat-absorbing and re-radiating surfaces and preferably combined with a convection-reducing wire screen in immediate proximity to the peaks of the surfaces, the angularly disposed ridges and the wire screen cooperating to increase the radiant heat output by a more effective utilization of the heated air and by improved infrared radiation capability.
Inventors
- 👤 William G Milligan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:06
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/0014
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
81 words
A heating assembly comprising a housing, a pair of unconnected ridged plates supported in said housing, said plates being composed of a metal which absorbs infrared radiation efficiently and which becomes an efficient infrared radiator at the operating temperature of the assembly, an electrical heating element disposed below the peaks of the ridges in said plates, a wire screen in closely spaced relation to the peaks of said ridges, and thermal-insulating means spacing said plates from the rear of said housing.
Claim 2
Dependent Claim
81 words
A heating assembly comprising a housing, a pair of unconnected ridged plates supported in said housing, said plates being composed of a metal which absorbs infrared radiation efficiently and which becomes an efficient infrared radiator at the operating temperature of the assembly, an electrical heating element disposed below the peaks of the ridges in said plates, a wire screen in closely spaced relation to the peaks of said ridges, and thermal-insulating means spacing said plates from the rear of said housing.
Claim 3
Dependent Claim
37 words
The heating assembly of claim 1 in which said ridges are formed on a plate extending across said housing, and the assembly includes a mat of ceramic wool spacing said plate from the rear of said housing.
Claim 4
Dependent Claim
22 words
The assembly of claim 1 in which the included angle in the ridges is in the range from 50* to 90* .
Claim 5
Dependent Claim
22 words
The heating assembly of claim 1 in which said plates are laterally supported within said housing on a mat of ceramic wool.
Claim 6
Dependent Claim
16 words
The heating assembly of claim 1 in which said ridged plates are composed of stainless steel.
Claim 7
Dependent Claim
31 words
The assembly of claim 1 in which said screen has from four to 100 openings per square inch and is positioned within about one-half inch of the peaks of said ridges.
References Cited (Backward Citations)
US619314A
Cited
US1061332A
Cited
US1399428A
Cited
US1479819A
Cited
US1652686A
Cited
US2035306A
Cited
US2152934A
Cited
US2469234A
Cited
US2631216A
Cited
FR1078795A
Cited
US2826669A
Cited
US2879369A
Cited
US3246121A
Cited
US3436524A
Cited
US3493724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |