US3102185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duct heater assembly
Assignee: Edwin L Wiegand Co
•
Filing: 1960-03-31
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Granted: 1963-08-27
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Expires: 1980-03-31
Abstract
No abstract record available.
Inventors
- 👤 Robert L Boyd
- 👤 John F Volker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:22
CPC Classifications
F; F24; F24D; F24D5/00; F24D5/06; F24D5/08; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
AN ELECTRIC HEATING ASSEMBLY FOR USE IN A DUCT WORK SYSTEM, COMPRISING A HOUSING ADAPTED TO BE MOUNTED WITHIN THE DUCT WORK SYSTEM WHEREBY AIR FLOWING THROUGH THE SYSTEM ENTERS SAID HOUSING AT ONE PLACE AND EXHAUSTS FROM SAID HOUSING AT A SPACED PLACE, A PLURALITY OF HAIR-PIN TYPE ELECTRIC HEATING ELEMENTS MOUNTED WITHIN SAID HOUSING, EACH HAVING A PAIR OF LEGS EXTENDING TRANSVERSELY TO THE LINE OF AIR FLOW THERETHROUGH, AND THERMAL CUT-OUT MEANS FOR INTERRUPTING FLOW OF ELECTRICAL ENERGY TO SAID HEATING ELEMENTS WHEN A PREDETERMINED TEMPERATURE IS REACHED IN SAID HOUSING, SAID CUT-OUT MEANS INCLUDING A HEAT SENSING ELEMENT LOCATED BETWEEN OPPOSED SIDES OF THE LEGS OF AT LEAST CERTAIN OF SAID HAIR-PIN HEATING ELEMENTS.
Claim 2
Dependent Claim
118 words
AN ELECTRIC HEATING ASSEMBLY FOR USE IN A DUCT WORK SYSTEM, COMPRISING A HOUSING ADAPTED TO BE MOUNTED WITHIN THE DUCT WORK SYSTEM WHEREBY AIR FLOWING THROUGH THE SYSTEM ENTERS SAID HOUSING AT ONE PLACE AND EXHAUSTS FROM SAID HOUSING AT A SPACED PLACE, A PLURALITY OF HAIR-PIN TYPE ELECTRIC HEATING ELEMENTS MOUNTED WITHIN SAID HOUSING, EACH HAVING A PAIR OF LEGS EXTENDING TRANSVERSELY TO THE LINE OF AIR FLOW THERETHROUGH, AND THERMAL CUT-OUT MEANS FOR INTERRUPTING FLOW OF ELECTRICAL ENERGY TO SAID HEATING ELEMENTS WHEN A PREDETERMINED TEMPERATURE IS REACHED IN SAID HOUSING, SAID CUT-OUT MEANS INCLUDING A HEAT SENSING ELEMENT LOCATED BETWEEN OPPOSED SIDES OF THE LEGS OF AT LEAST CERTAIN OF SAID HAIR-PIN HEATING ELEMENTS.
References Cited (Backward Citations)
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US2568278A
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US2712588A
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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) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |