Patent US3874570A successfully refreshed from Google Patents.
US3203473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft heating system
Assignee: Lockheed Martin Corp
•
Filing: 1960-10-05
•
Granted: 1965-08-31
•
Expires: 1980-10-05
Abstract
No abstract record available.
Inventors
- 👤 Archie E Goode
- 👤 Thomas G Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:35
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06; B64D13/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
A WARM AIR HEATING SYSTEM FOR AN AIRCRAFT COMPARTMENT COMPRISING: A PRESSURIZED HOT AIR SOURCE, A TWO BRANCH DUCT MEANS CONNECTED TO SAID AIR SOURCE FOR RECEIVING A FLOW OF HOT AIR THEREFROM, THE ENTIRE FLOW INTO THE TWO BRANCH DUCT MEANS BEING PRESSURIZED HOT AIR FROM SAID AIR SOURCE, FIRST AIR DISTRIBUTION MEANS BENEATH THE COMPARTMENT FLOOR FOR HEATING THEREOF AND CONNECTED TO ONE OF THE BRANCH DUCTS TO RECEIVE A PORTION OF THE AIR FLOW THEREFROM, AIR FLOW DISCHARGES MEANS PROXIMATE THE FLOOR LEVEL OF THE COMPARTMENT PASSING AT LEAST SOME OF THE AIR FLOW FROM SAID FIRST AIR DISTRIBUTION MEANS INTO THE COMPARTMENT, A SECOND AIR DISTRIBUTION MEANS LOCATED AT A LEVEL ABOVE THE COMPARTMENT FLOOR, SAID SECOND AIR DISTRIBUTION MEANS CONNECTED TO THE OTHER DUCT BRANCH FOR DISCHARGING THE REMAINING PORTION OF THE AIR FLOW INTO THE UPPER PORTION OF THE COMPARTMENT, A THROTTLING VALVE IN SAID OTHER DUCT BRANCH CONTROLLING THE RELATIVE AIR FLOW PORTIONS IN THE TWO BRANCHES OF THE DUCT MEANS, AND MEANS THERMALLY RESPONSIVE TO THE UNDERFLOOR AIR FLOW ADJUSTING THE THROTTLING VALVE TO VARY THE RELATIVE AIR FLOWS THROUGH THE FIRST AND SECOND AIR DISTRIBUTION MEANS.
Claim 2
Dependent Claim
195 words
A WARM AIR HEATING SYSTEM FOR AN AIRCRAFT COMPARTMENT COMPRISING: A PRESSURIZED HOT AIR SOURCE, A TWO BRANCH DUCT MEANS CONNECTED TO SAID AIR SOURCE FOR RECEIVING A FLOW OF HOT AIR THEREFROM, THE ENTIRE FLOW INTO THE TWO BRANCH DUCT MEANS BEING PRESSURIZED HOT AIR FROM SAID AIR SOURCE, FIRST AIR DISTRIBUTION MEANS BENEATH THE COMPARTMENT FLOOR FOR HEATING THEREOF AND CONNECTED TO ONE OF THE BRANCH DUCTS TO RECEIVE A PORTION OF THE AIR FLOW THEREFROM, AIR FLOW DISCHARGES MEANS PROXIMATE THE FLOOR LEVEL OF THE COMPARTMENT PASSING AT LEAST SOME OF THE AIR FLOW FROM SAID FIRST AIR DISTRIBUTION MEANS INTO THE COMPARTMENT, A SECOND AIR DISTRIBUTION MEANS LOCATED AT A LEVEL ABOVE THE COMPARTMENT FLOOR, SAID SECOND AIR DISTRIBUTION MEANS CONNECTED TO THE OTHER DUCT BRANCH FOR DISCHARGING THE REMAINING PORTION OF THE AIR FLOW INTO THE UPPER PORTION OF THE COMPARTMENT, A THROTTLING VALVE IN SAID OTHER DUCT BRANCH CONTROLLING THE RELATIVE AIR FLOW PORTIONS IN THE TWO BRANCHES OF THE DUCT MEANS, AND MEANS THERMALLY RESPONSIVE TO THE UNDERFLOOR AIR FLOW ADJUSTING THE THROTTLING VALVE TO VARY THE RELATIVE AIR FLOWS THROUGH THE FIRST AND SECOND AIR DISTRIBUTION MEANS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |