US3174572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicles for travelling over land and/or water
Assignee: HOVERERAFT DEV Ltd
•
Filing: 1961-07-25
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Granted: 1965-03-23
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Expires: 1981-07-25
Abstract
No abstract record available.
Inventors
- 👤 Eggington Wilfred James
- 👤 Tattersall Edward Gunston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:53
CPC Classifications
B; B60; B60V; B60V1/00; B60V1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A VEHICLE FOR TRAVELLING OVER A SURFACE WHICH IS AT LEAST PARTLY SUPPORTED ABOVE THAT SURFACE BY A CUSHION OF PRESSURISED GAS AT LEAST PARTLY FORMED AND CONTAINED BENEATH THE VEHICLE BY A CURTAIN OF FLUID ISSUING FROM A SUPPLY PORT FORMED IN THE BOTTOM OF THE VEHICLE COMPRISING A RETO THE PERIPHERY THEREOF, SAID VEHICLE COMPRISING A RECOVERY PORT FORMED IN THE BOTTOM OF THE VEHICLE, INBOARD OF AND SUBSTANTIALLY PARALLEL TO THE SUPPLY PORT, THROUGH WHICH PART OF THE CURTAIN FORMING FLUID IS NORMALLY RECOVERED FOR RE-USE, THE RECOVERY PORT BEING ADJACENT TO THE SUPPLY PORT AND BOUNDING AN AREA OF THE BOTTOM SURFACE OF THE VEHICLE INBOARD OF SAID RECOVERY PORT AGAINST WHICH THE CUSHION PRESSURE IS EXERTED DURING NORMAL OPERATION OF THE VEHICLE, AND MEANS FOR CONTROLLING THE FLOW OF CURTAIN FORMING FLUID INTO THE RECOVERY PORT.
Claim 2
Dependent Claim
141 words
A VEHICLE FOR TRAVELLING OVER A SURFACE WHICH IS AT LEAST PARTLY SUPPORTED ABOVE THAT SURFACE BY A CUSHION OF PRESSURISED GAS AT LEAST PARTLY FORMED AND CONTAINED BENEATH THE VEHICLE BY A CURTAIN OF FLUID ISSUING FROM A SUPPLY PORT FORMED IN THE BOTTOM OF THE VEHICLE COMPRISING A RETO THE PERIPHERY THEREOF, SAID VEHICLE COMPRISING A RECOVERY PORT FORMED IN THE BOTTOM OF THE VEHICLE, INBOARD OF AND SUBSTANTIALLY PARALLEL TO THE SUPPLY PORT, THROUGH WHICH PART OF THE CURTAIN FORMING FLUID IS NORMALLY RECOVERED FOR RE-USE, THE RECOVERY PORT BEING ADJACENT TO THE SUPPLY PORT AND BOUNDING AN AREA OF THE BOTTOM SURFACE OF THE VEHICLE INBOARD OF SAID RECOVERY PORT AGAINST WHICH THE CUSHION PRESSURE IS EXERTED DURING NORMAL OPERATION OF THE VEHICLE, AND MEANS FOR CONTROLLING THE FLOW OF CURTAIN FORMING FLUID INTO THE RECOVERY PORT.
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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |