US3113501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air door
Assignee: Individual
•
Filing: 1961-09-15
•
Granted: 1963-12-10
•
Expires: 1981-09-15
Abstract
No abstract record available.
Inventors
- 👤 George K Cargo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:00
CPC Classifications
F; F24; F24F; F24F9/00; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/76; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1927; G05D23/193; G05D23/1931; G05D23/20; G05D23/24; Y; Y10; Y10S; Y10S55/00; Y10S55/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
213 words
AN AIR DOOR FOR A BUILDING OR THE LIKE COMPRISING A PORTAL OPENING, A DUCT HAVING AN INLET END AND AN OUTLET END DISPOSED AT OPPOSITE SIDES OF SAID PORTAL OPENING, FOR CONDUCTING AIR IN A PRESCRIBED PATH WHICH INCLUDES SAID PORTAL OPENING, MEANS FOR PROPELLING AIR THROUGH SAID DUCT AND AT A PREDETERMINED VELOCITY THEREIN, TEMPERATURE CONTROL MEANS INCLUDING HEAT EXCHANGER MEANS TO WHICH THE AIR IS SUBJECTED TO EFFECT A PREDETERMINED TEMPERATURE VALUE THEREOF, MEANS IN THE OUTLET OF SAID DUCT FOR DIRECTING THE FLOW OF AIR ACROSS SAID PORTAL OPENING AS AN INVISIBLE THERMAL SHIELD, TWO TEMPERATURE SENSITIVE ELEMENTS, ONE OF SAID ELEMENTS BEING IN THE FLOW OF AIR ACROSS SAID PORTAL OPENING AND THE OTHER BEING OUTSIDE OF THE PORTAL OPENING AND OUTSIDE THE BUILDING, BRIDGE CIRCUIT MEANS COUPLED TO SAID ELEMENTS FOR PRODUCING AN ELECTRICAL SIGNAL WHICH VARIES AS A FUNCTION OF THE TEMPERATURE DIFFERENTIAL MEASURED BY SAID ELEMENTS, AND CONTROL MEANS OPERATIVELY CONNECTED TO SAID BRIDGE CIRCUIT MEANS AND RESPONSIVE TO SAID ELECTRICAL SIGNAL FOR REGULATING SAID TEMPERATURE CONTROL MEANS TO INCREASE THE TEMPERATURE OF THE FLOW OF AIR ACROSS SAID PORTAL OPENING WHEN THE OUTSIDE TEMPERATURE DECREASES AND TO DECREASE THE TEMPERATURE OF THE FLOW OF AIR ACROSS SAID PORTAL OPENING WHEN THE OUTSIDE TEMPERATURE INCREASES.
Claim 2
Dependent Claim
213 words
AN AIR DOOR FOR A BUILDING OR THE LIKE COMPRISING A PORTAL OPENING, A DUCT HAVING AN INLET END AND AN OUTLET END DISPOSED AT OPPOSITE SIDES OF SAID PORTAL OPENING, FOR CONDUCTING AIR IN A PRESCRIBED PATH WHICH INCLUDES SAID PORTAL OPENING, MEANS FOR PROPELLING AIR THROUGH SAID DUCT AND AT A PREDETERMINED VELOCITY THEREIN, TEMPERATURE CONTROL MEANS INCLUDING HEAT EXCHANGER MEANS TO WHICH THE AIR IS SUBJECTED TO EFFECT A PREDETERMINED TEMPERATURE VALUE THEREOF, MEANS IN THE OUTLET OF SAID DUCT FOR DIRECTING THE FLOW OF AIR ACROSS SAID PORTAL OPENING AS AN INVISIBLE THERMAL SHIELD, TWO TEMPERATURE SENSITIVE ELEMENTS, ONE OF SAID ELEMENTS BEING IN THE FLOW OF AIR ACROSS SAID PORTAL OPENING AND THE OTHER BEING OUTSIDE OF THE PORTAL OPENING AND OUTSIDE THE BUILDING, BRIDGE CIRCUIT MEANS COUPLED TO SAID ELEMENTS FOR PRODUCING AN ELECTRICAL SIGNAL WHICH VARIES AS A FUNCTION OF THE TEMPERATURE DIFFERENTIAL MEASURED BY SAID ELEMENTS, AND CONTROL MEANS OPERATIVELY CONNECTED TO SAID BRIDGE CIRCUIT MEANS AND RESPONSIVE TO SAID ELECTRICAL SIGNAL FOR REGULATING SAID TEMPERATURE CONTROL MEANS TO INCREASE THE TEMPERATURE OF THE FLOW OF AIR ACROSS SAID PORTAL OPENING WHEN THE OUTSIDE TEMPERATURE DECREASES AND TO DECREASE THE TEMPERATURE OF THE FLOW OF AIR ACROSS SAID PORTAL OPENING WHEN THE OUTSIDE TEMPERATURE INCREASES.
References Cited (Backward Citations)
GB481991A
Cited
DE1013051B
Cited
US3021775A
Cited
US3021776A
Cited
US3018712A
Cited
US3023689A
Cited
US3068775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-09 | 1967-06-10 | 1967-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-09 | 1971-06-10 | 1971-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-09 | 1975-06-10 | 1975-12-10 | $7700.00 | Window Closed / Lapsed |