Patent US3235278A successfully refreshed from Google Patents.
US3235278A
Expired / Lapsed
US
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Obstacle or stair-climbing trailer
Assignee: Individual
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Filing: 1963-10-28
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Granted: 1966-02-15
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Expires: 1983-10-28
Abstract
No abstract record available.
Inventors
- 👤 Ilon Bengt Erland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:18
CPC Classifications
B; B62; B62B; B62B3/00; B62B5/00; B62B5/02; B62B9/00; B62B9/02; B62D; B62D21/00; B62D21/18; B62D63/00; B62D63/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A VEHICLE COMPRISING A FRAME HAVING A DRAGPOINT, A PAIR OF PIVOT ARMS PIVOTALLY CONNECTED TO AND DEPENDING FROM THE FRAME, A BEAM PIVOTALLY CONNECTED TO THE ARMS, THE DISTANCE BETWEEN THE PIVOTAL CONNECTIONS OF THE ARMS TO THE FRAME BEING GREATER THAN THE DISTANCE BETWEEN THE PIVOTAL CONNECTIONS OF THE BEAM TO THE ARMS, AND FRONT AND REAR GROUND TRAVERSING MEANS PIVOTALLY CONNECTED TO SAID BEAM, WITH THE VEHICLE ON LEVEL GROUND SAID ARMS LYING IN PLANES WHICH INTERSECT BELOW A PLANE PASSING THROUGH THE DRAGPOINT AND THE CENTER OF THE PIVOTAL CONNECTION OF THE REAR GROUND TRAVERSING MEANS TO THE BEAM AND ABOVE A PLANE PASSING THROUGH THE DRAGPOINT AND THE CENTER OF THE PIVOTAL CONNECTION OF THE FRONT GROUND TRAVERSING MEANS TO THE BEAM.
Claim 2
Dependent Claim
127 words
A VEHICLE COMPRISING A FRAME HAVING A DRAGPOINT, A PAIR OF PIVOT ARMS PIVOTALLY CONNECTED TO AND DEPENDING FROM THE FRAME, A BEAM PIVOTALLY CONNECTED TO THE ARMS, THE DISTANCE BETWEEN THE PIVOTAL CONNECTIONS OF THE ARMS TO THE FRAME BEING GREATER THAN THE DISTANCE BETWEEN THE PIVOTAL CONNECTIONS OF THE BEAM TO THE ARMS, AND FRONT AND REAR GROUND TRAVERSING MEANS PIVOTALLY CONNECTED TO SAID BEAM, WITH THE VEHICLE ON LEVEL GROUND SAID ARMS LYING IN PLANES WHICH INTERSECT BELOW A PLANE PASSING THROUGH THE DRAGPOINT AND THE CENTER OF THE PIVOTAL CONNECTION OF THE REAR GROUND TRAVERSING MEANS TO THE BEAM AND ABOVE A PLANE PASSING THROUGH THE DRAGPOINT AND THE CENTER OF THE PIVOTAL CONNECTION OF THE FRONT GROUND TRAVERSING MEANS TO THE BEAM.
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |