Patent US3248086A successfully refreshed from Google Patents.
US3248086A
Expired / Lapsed
US
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Load lifting devices
Assignee: Hovercraft Development Ltd
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Filing: 1963-01-04
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Granted: 1966-04-26
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Expires: 1983-01-04
Abstract
No abstract record available.
Inventors
- 👤 Cockerell Christopher Sydney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:41
CPC Classifications
B; B60; B60V; B60V1/00; B60V3/00; B60V3/02; B60V3/025; B65; B65G; B65G7/00; B65G7/02; B65G7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
APPARATUS FOR MOVING A LOAD WHICH IS NORMALLY SUPPORTED ON A SURFACE COMPRISING A GAS-RETAINING ENVELOPE OF FLEXIBLE MATERIAL ADAPTED TO BE POSITIONED OVER THE LOAD SO AS TO ENVELOP IT WHILE PRESENTING AN OPEN MOUTH TOWARDS THE SURFACE ON WHICH THE LOAD IS SUPPORTED, SAID ENVELOPE COMPRISING TWO SHEETS OF MATERIAL SPACED APART TO DEFINE A CLOSED SPACE AND COOPERATING WITH SAID SURFACE TO FORM A CUSHION SPACE WHEREIN A GASEOUS PRESSURE MAY BE MAINTAINED, MEANS FOR DETACHABLY CONNECTING THE LOAD TO A PART OF SAID ENVELOPE INTERNALLY THEREOF, MEANS FOR INTRODUCING INTO SAID CUSHION SPACE GAS AT SUFFICIENT PRESSURE TO INFLATE SAID ENVELOPE AND TO RAISE AT LEAST THE PART OF SAID ENVELOPE TO WHICH THE LOAD IS CONNECTED RELATIVE TO THE SURFACE SUFFICIENTLY TO TAKE A MAJOR PART OF THE WEIGHT OF SAID LOAD OFF SAID SURFACE SO THAT THE LOAD MAY BE MORE EASILY MOVED, AND MEANS FOR SUPPLYING GAS UNGER PRESSURE TO SAID CLOSED SPACE.
Claim 2
Dependent Claim
160 words
APPARATUS FOR MOVING A LOAD WHICH IS NORMALLY SUPPORTED ON A SURFACE COMPRISING A GAS-RETAINING ENVELOPE OF FLEXIBLE MATERIAL ADAPTED TO BE POSITIONED OVER THE LOAD SO AS TO ENVELOP IT WHILE PRESENTING AN OPEN MOUTH TOWARDS THE SURFACE ON WHICH THE LOAD IS SUPPORTED, SAID ENVELOPE COMPRISING TWO SHEETS OF MATERIAL SPACED APART TO DEFINE A CLOSED SPACE AND COOPERATING WITH SAID SURFACE TO FORM A CUSHION SPACE WHEREIN A GASEOUS PRESSURE MAY BE MAINTAINED, MEANS FOR DETACHABLY CONNECTING THE LOAD TO A PART OF SAID ENVELOPE INTERNALLY THEREOF, MEANS FOR INTRODUCING INTO SAID CUSHION SPACE GAS AT SUFFICIENT PRESSURE TO INFLATE SAID ENVELOPE AND TO RAISE AT LEAST THE PART OF SAID ENVELOPE TO WHICH THE LOAD IS CONNECTED RELATIVE TO THE SURFACE SUFFICIENTLY TO TAKE A MAJOR PART OF THE WEIGHT OF SAID LOAD OFF SAID SURFACE SO THAT THE LOAD MAY BE MORE EASILY MOVED, AND MEANS FOR SUPPLYING GAS UNGER PRESSURE TO SAID CLOSED SPACE.
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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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |