Patent US3185239A successfully refreshed from Google Patents.
US3185239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicles for travelling over land and/or water
Assignee: Hovercraft Development Ltd
•
Filing: 1961-04-03
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Granted: 1965-05-25
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Expires: 1981-04-03
Abstract
No abstract record available.
Inventors
- 👤 Cockerell Christopher Sydney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:51
CPC Classifications
B; B60; B60V; B60V1/00; B60V1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
IN A VEHICLE FOR TRAVELLING OVER A SURFACE OF THE TYPE ADAPTED TO BE AT LEAST PARTLY SUPPORTED ABOVE THAT SURFACE BY A CUSHION OF PRESSURISED GAS, THE CUSHION BEING CONTAINED FOR AT LEAST PART OF ITS PERIHPERY BY A CURTAIN OF FLUID ISSUING FROM A SUPPLY PORT FORMED IN THE BOTTOM SURFACE OF THE VEHICLE ADJACENT TO THE PERIPHERY THEREOF, THE IMPROVEMENT WHICH CONSISTS IN THE PROVISION OF A PLURALITY OF ROTARY PUMPS POSITIONED ADJACENT TO THE PERIPHERY OF THE VEHICLE FOR ENERGISING THE CURTAIN FORMING FLUID WHICH ISSUED FROM THE SUPPLY PORT, EACH OF SAID PUMPS INCLUDING AN AXIALLY ELONGATED ROTOR EXTENDING ALONG A SUBSTANTIAL PORTION OF THE PERIPHERY OF THE CUSHION CONTAINED BY SAID CURTAIN AND HAVING ITS AXIS OF ROTATION SUBSTANTIALLY PARALLEL TO THE ADJACENT PORTION OF SAID CURTAIN.
Claim 2
Dependent Claim
133 words
IN A VEHICLE FOR TRAVELLING OVER A SURFACE OF THE TYPE ADAPTED TO BE AT LEAST PARTLY SUPPORTED ABOVE THAT SURFACE BY A CUSHION OF PRESSURISED GAS, THE CUSHION BEING CONTAINED FOR AT LEAST PART OF ITS PERIHPERY BY A CURTAIN OF FLUID ISSUING FROM A SUPPLY PORT FORMED IN THE BOTTOM SURFACE OF THE VEHICLE ADJACENT TO THE PERIPHERY THEREOF, THE IMPROVEMENT WHICH CONSISTS IN THE PROVISION OF A PLURALITY OF ROTARY PUMPS POSITIONED ADJACENT TO THE PERIPHERY OF THE VEHICLE FOR ENERGISING THE CURTAIN FORMING FLUID WHICH ISSUED FROM THE SUPPLY PORT, EACH OF SAID PUMPS INCLUDING AN AXIALLY ELONGATED ROTOR EXTENDING ALONG A SUBSTANTIAL PORTION OF THE PERIPHERY OF THE CUSHION CONTAINED BY SAID CURTAIN AND HAVING ITS AXIS OF ROTATION SUBSTANTIALLY PARALLEL TO THE ADJACENT PORTION OF SAID CURTAIN.
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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) | 1968-05-24 | 1968-11-23 | 1969-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-24 | 1972-11-23 | 1973-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-24 | 1976-11-23 | 1977-05-25 | $7700.00 | Window Closed / Lapsed |