Patent AT78118B successfully refreshed from Google Patents.
Patent US3309502A successfully refreshed from Google Patents.
US3309502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damper control and assembly for heating and ventilating apparatus
Assignee: CEILHEAT Inc
•
Filing: 1964-10-30
•
Granted: 1967-03-14
•
Expires: 1984-10-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Jack Witherspoon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:30
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405; F24H3/0411
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A ROOM HEATING AND VENTILATING UNIT COMPRISING IN COMBINATION A HOUSING HAVING A PLURALITY OF PASSAGES, ONE OF WHICH IS ADAPTED TO DELIVER AIR INTO THE ROOM, EXHAUST MEANS CONNECTED TO ANOTHER OF SAID PASSAGES, AN ELECTRICAL HEATING ELEMENT IN SAID HOUSING ADAPTED TO BE ENERGIZED FOR HEATING THE ROOM, A FAN AND A UNIDIRECTIONAL MOTOR FOR DRIVING SAID FAN DISPOSED IN SAID HOUSING, MEANS FOR SELECTIVELY DRIVING SAID MOTOR AT ONE OF TWO SPEEDS FOR ESTABLISHING A PREDETERMINED FORCED AIR FLOW THROUGH SAID PASSAGES FOR HEATING AND VENTILATING THE ROOM, AND A BIASED DAMPER MOVABLE BETWEEN A FIRST AND A SECOND POSITION AND OPERABLE IN RESPONSE TO THE FORCE OF THE AIR FLOW FOR DIRECTING THE AIR FLOW THROUGH A SELECTED ONE OF SAID PASSAGES.
Claim 2
Dependent Claim
126 words
A ROOM HEATING AND VENTILATING UNIT COMPRISING IN COMBINATION A HOUSING HAVING A PLURALITY OF PASSAGES, ONE OF WHICH IS ADAPTED TO DELIVER AIR INTO THE ROOM, EXHAUST MEANS CONNECTED TO ANOTHER OF SAID PASSAGES, AN ELECTRICAL HEATING ELEMENT IN SAID HOUSING ADAPTED TO BE ENERGIZED FOR HEATING THE ROOM, A FAN AND A UNIDIRECTIONAL MOTOR FOR DRIVING SAID FAN DISPOSED IN SAID HOUSING, MEANS FOR SELECTIVELY DRIVING SAID MOTOR AT ONE OF TWO SPEEDS FOR ESTABLISHING A PREDETERMINED FORCED AIR FLOW THROUGH SAID PASSAGES FOR HEATING AND VENTILATING THE ROOM, AND A BIASED DAMPER MOVABLE BETWEEN A FIRST AND A SECOND POSITION AND OPERABLE IN RESPONSE TO THE FORCE OF THE AIR FLOW FOR DIRECTING THE AIR FLOW THROUGH A SELECTED ONE OF SAID PASSAGES.
References Cited (Backward Citations)
US2133188A
Cited
US2583754A
Cited
US2647198A
Cited
US2870319A
Cited
US2875316A
Cited
US3097287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |