US3330221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-cushion supported vehicles with drag inhibiting means for travelling on rails
Assignee: Hovercraft Development Ltd
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Filing: 1964-12-14
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Granted: 1967-07-11
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Expires: 1984-12-14
Abstract
No abstract record available.
Inventors
- 👤 Trillo Robert Longley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:09
CPC Classifications
B; B60; B60V; B60V3/00; B60V3/02; B60V3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A GAS-CUSHION SUPPORTED VEHICLE WHICH, IN OPERATION, IS SUPPORTED RELATIVE TO A SURFACE BY AT LEAST ONE CUSHION OF PRESSURISED GAS FORMED AND CONTAINED IN A SPACE BETWEEN THE SURFACE AND THE VEHICLE COMPRISING A VEHICLE BODY, BOUNDARY LAYER AIR INTAKE MEANS EXTENDING AROUND AT LEAST THE TOP AND SIDES OF THE VEHICLE BODY IN A DIRECTION SUBSTANTIALLY NORMAL TO AMBIENT AIR FLOW OVER THE VEHICLE BODY, AN AXIAL FLOW FAN MOUNTED WITHIN THE VEHICLE BODY WITH ITS ROTATIONAL AXIS SUBSTANTIALLY PARALLEL TO THE FORE AND AFT AXIS OF THE VEHICLE, SAID FAN HAVING AN AIR INLET AND AN AIR OUTLET, FIRST DUCT MEANS CONNECTING THE INTAKE MEANS WITH SAID AIR INLET, AND SECOND DUCT MEANS CONNECTING SAID AIR OUTLET WITH THE CUSHION SPACE, WHEREBY BOUNDARY LAYER AIR DRAWN INTO SAID INTAKE MEANS PROVIDES AT LEAST PART OF THE GAS CUSHION SUPPORTING THE VEHICLE.
Claim 2
Dependent Claim
144 words
A GAS-CUSHION SUPPORTED VEHICLE WHICH, IN OPERATION, IS SUPPORTED RELATIVE TO A SURFACE BY AT LEAST ONE CUSHION OF PRESSURISED GAS FORMED AND CONTAINED IN A SPACE BETWEEN THE SURFACE AND THE VEHICLE COMPRISING A VEHICLE BODY, BOUNDARY LAYER AIR INTAKE MEANS EXTENDING AROUND AT LEAST THE TOP AND SIDES OF THE VEHICLE BODY IN A DIRECTION SUBSTANTIALLY NORMAL TO AMBIENT AIR FLOW OVER THE VEHICLE BODY, AN AXIAL FLOW FAN MOUNTED WITHIN THE VEHICLE BODY WITH ITS ROTATIONAL AXIS SUBSTANTIALLY PARALLEL TO THE FORE AND AFT AXIS OF THE VEHICLE, SAID FAN HAVING AN AIR INLET AND AN AIR OUTLET, FIRST DUCT MEANS CONNECTING THE INTAKE MEANS WITH SAID AIR INLET, AND SECOND DUCT MEANS CONNECTING SAID AIR OUTLET WITH THE CUSHION SPACE, WHEREBY BOUNDARY LAYER AIR DRAWN INTO SAID INTAKE MEANS PROVIDES AT LEAST PART OF THE GAS CUSHION SUPPORTING THE VEHICLE.
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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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |