US3335876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible tower crane
Assignee: Richier SA
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Filing: 1965-10-24
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Granted: 1967-08-15
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Expires: 1985-10-24
Abstract
No abstract record available.
Inventors
- 👤 Durand Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:49
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/18; B66C23/26; B66C23/34; B66C23/344
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
A COLLAPSIBLE TOWER CRANE COMPRISING A CHASSIS, A FRAMEWORK CARRIED BY SAID CHASSIS FOR ROTATION ABOUT AN UPRIGHT AXIS, A LOWER TOWER SECTION PIVOTALLY MOUNTED ON THE FRAMEWORK FOR VERTICAL SWINGING MOVEMENT ABOUT A FIXED HORIZONTAL AXIS DISPOSED A SUBSTANTIAL DISTANCE ABOVE THE LOWER END OF THE LOWER TOWER SECTION, AN UPPER TOWER SECTION PIVOTALLY CONNECTED TO THE UPPER END OF THE LOWER TOWER SECTION ABOUT A HORIZONTAL AXIS, A CONNECTING ROD ONE END OF WHICH IS PIVOTALLY SECURED TO THE FRAMEWORK FOR VERTICAL SWINGING MOVEMENT ABOUT A FIXED HORIZONTAL AXIS AND THE OTHER END OF WHICH IS PIVOTALLY SECURED TO THE UPPER TOWER SECTION ABOUT A HORIZONTAL AXIS SO THAT THE FRAMEWORK AND THE CONNECTING ROD AND THE TWO TOWER SECTIONS FORM A QUADRILATERAL LINKAGE HAVING TWO FIXED PIVOTS CARRIED BY THE FRAMEWORK AND TWO VERTICALLY SWINGING PIVOTS CARRIED BY THE TOWER SECTIONS, AND MEANS ACTING AGAINST THE LOWER END OF THE LOWER TOWER SECTION A DISTANCE FROM ITS FIXED HORIZONTAL AXIS TO DEFORM A QUADILATERAL LINKAGE TO RAISE AND LOWER THE TOWER SECTIONS.
Claim 2
Dependent Claim
175 words
A COLLAPSIBLE TOWER CRANE COMPRISING A CHASSIS, A FRAMEWORK CARRIED BY SAID CHASSIS FOR ROTATION ABOUT AN UPRIGHT AXIS, A LOWER TOWER SECTION PIVOTALLY MOUNTED ON THE FRAMEWORK FOR VERTICAL SWINGING MOVEMENT ABOUT A FIXED HORIZONTAL AXIS DISPOSED A SUBSTANTIAL DISTANCE ABOVE THE LOWER END OF THE LOWER TOWER SECTION, AN UPPER TOWER SECTION PIVOTALLY CONNECTED TO THE UPPER END OF THE LOWER TOWER SECTION ABOUT A HORIZONTAL AXIS, A CONNECTING ROD ONE END OF WHICH IS PIVOTALLY SECURED TO THE FRAMEWORK FOR VERTICAL SWINGING MOVEMENT ABOUT A FIXED HORIZONTAL AXIS AND THE OTHER END OF WHICH IS PIVOTALLY SECURED TO THE UPPER TOWER SECTION ABOUT A HORIZONTAL AXIS SO THAT THE FRAMEWORK AND THE CONNECTING ROD AND THE TWO TOWER SECTIONS FORM A QUADRILATERAL LINKAGE HAVING TWO FIXED PIVOTS CARRIED BY THE FRAMEWORK AND TWO VERTICALLY SWINGING PIVOTS CARRIED BY THE TOWER SECTIONS, AND MEANS ACTING AGAINST THE LOWER END OF THE LOWER TOWER SECTION A DISTANCE FROM ITS FIXED HORIZONTAL AXIS TO DEFORM A QUADILATERAL LINKAGE TO RAISE AND LOWER THE TOWER SECTIONS.
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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |