Patent US3097721A successfully refreshed from Google Patents.
US3097721A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerial ladder
Assignee: Individual
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Filing: 1962-03-26
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Granted: 1963-07-16
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Expires: 1982-03-26
Abstract
No abstract record available.
Inventors
- 👤 Gordon L Thym
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:39
CPC Classifications
B; B66; B66F; B66F11/00; B66F11/04; B66F11/044; B66F11/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
199 words
AN EXPANSIBLE AERIAL LADDER COMPRISING A LOWER SECTION, AN UPPER SECTION DISPOSED TO TELESCOPE INTO SAID LOWER SECTION, A PEDESTAL, SAID LOWER SECTION MOUNTED AT ONE END ON SAID PEDESTAL TO ROTATE ABOUT A FIRST AXIS, A FIRST LINK ALSO MOUNTED ON SAID PEDESTAL TO ROTATE ABOUT A SECOND AXIS, A SECOND LINK PIN-CONNECTED BY ONE END TO SAID FIRST LINK TO ROTATE ABOUT A THIRD AXIS THEREWITH AND PIN-CONNECTED BY ITS OTHER END TO SAID LOWER SECTION TO ROTATE ABOUT A FOURTH AXIS THEREWITH WHEREBY SAID LOWER SECTION, SAID PEDESTAL, SAID FIRST LINK AND SAID SECOND LINK FROM A PARALLELOGRAM LINKAGE; A LEVER PIN-CONNECTED TO SAID UPPER SECTION AND DISPOSED TO ROTATE THEREWITH ON A FIFTH AXIS; SAID FIRST AND FOURTH AXES BEING SUBSTANTIALLY PARALLEL, AND SAID FIFTH AXIS BEING FREE TO MOVE IN THE PLANE FORMED BY SAID FIRST AND FOURTH AXES AND SUBSTANTIALLY PARALLEL THERETO; AND MEANS FOR SECURING SAID LEVER TO SAID FIRST LINK AT A FIXED SPACED DISTANCE FROM SAID FIFTH AXIS AND IN SLIDING RELATION TO SAID FIRST LINK WHEREBY SAID LEVER REMAINS SUBSTANTIALLY PARALLEL TO SAID SECOND LINK WHEN SAID LADDER IS EXPANDED AND ROTATED TO HIGHER ELEVATIONS AND TO LOWER ELEVATIONS.
Claim 2
Dependent Claim
199 words
AN EXPANSIBLE AERIAL LADDER COMPRISING A LOWER SECTION, AN UPPER SECTION DISPOSED TO TELESCOPE INTO SAID LOWER SECTION, A PEDESTAL, SAID LOWER SECTION MOUNTED AT ONE END ON SAID PEDESTAL TO ROTATE ABOUT A FIRST AXIS, A FIRST LINK ALSO MOUNTED ON SAID PEDESTAL TO ROTATE ABOUT A SECOND AXIS, A SECOND LINK PIN-CONNECTED BY ONE END TO SAID FIRST LINK TO ROTATE ABOUT A THIRD AXIS THEREWITH AND PIN-CONNECTED BY ITS OTHER END TO SAID LOWER SECTION TO ROTATE ABOUT A FOURTH AXIS THEREWITH WHEREBY SAID LOWER SECTION, SAID PEDESTAL, SAID FIRST LINK AND SAID SECOND LINK FROM A PARALLELOGRAM LINKAGE; A LEVER PIN-CONNECTED TO SAID UPPER SECTION AND DISPOSED TO ROTATE THEREWITH ON A FIFTH AXIS; SAID FIRST AND FOURTH AXES BEING SUBSTANTIALLY PARALLEL, AND SAID FIFTH AXIS BEING FREE TO MOVE IN THE PLANE FORMED BY SAID FIRST AND FOURTH AXES AND SUBSTANTIALLY PARALLEL THERETO; AND MEANS FOR SECURING SAID LEVER TO SAID FIRST LINK AT A FIXED SPACED DISTANCE FROM SAID FIFTH AXIS AND IN SLIDING RELATION TO SAID FIRST LINK WHEREBY SAID LEVER REMAINS SUBSTANTIALLY PARALLEL TO SAID SECOND LINK WHEN SAID LADDER IS EXPANDED AND ROTATED TO HIGHER ELEVATIONS AND TO LOWER ELEVATIONS.
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) | 1966-07-15 | 1967-01-14 | 1967-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-15 | 1971-01-14 | 1971-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-15 | 1975-01-14 | 1975-07-16 | $7700.00 | Window Closed / Lapsed |